1 /* 2 * Copyright (c) 2000 3 * Bill Paul <wpaul@ee.columbia.edu>. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Bill Paul. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 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 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 * $FreeBSD: src/sys/dev/mii/xmphy.c,v 1.1.2.5 2002/11/08 21:53:49 semenu Exp $ 33 */ 34 35 /* 36 * driver for the XaQti XMAC II's internal PHY. This is sort of 37 * like a 10/100 PHY, except the only thing we're really autoselecting 38 * here is full/half duplex. Speed is always 1000mbps. 39 */ 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/socket.h> 45 #include <sys/bus.h> 46 47 #include <machine/clock.h> 48 49 #include <net/if.h> 50 #include <net/if_media.h> 51 52 #include "mii.h" 53 #include "miivar.h" 54 #include "miidevs.h" 55 56 #include "xmphyreg.h" 57 58 #include "miibus_if.h" 59 60 static int xmphy_probe (device_t); 61 static int xmphy_attach (device_t); 62 63 static device_method_t xmphy_methods[] = { 64 /* device interface */ 65 DEVMETHOD(device_probe, xmphy_probe), 66 DEVMETHOD(device_attach, xmphy_attach), 67 DEVMETHOD(device_detach, ukphy_detach), 68 DEVMETHOD(device_shutdown, bus_generic_shutdown), 69 DEVMETHOD_END 70 }; 71 72 static const struct mii_phydesc xmphys[] = { 73 MII_PHYDESC(xxXAQTI, XMACII), 74 MII_PHYDESC(JATO, BASEX), 75 MII_PHYDESC_NULL 76 }; 77 78 static devclass_t xmphy_devclass; 79 80 static driver_t xmphy_driver = { 81 "xmphy", 82 xmphy_methods, 83 sizeof(struct mii_softc) 84 }; 85 86 DRIVER_MODULE(xmphy, miibus, xmphy_driver, xmphy_devclass, NULL, NULL); 87 88 static int xmphy_service(struct mii_softc *, struct mii_data *, int); 89 static void xmphy_status(struct mii_softc *); 90 91 static int xmphy_mii_phy_auto(struct mii_softc *, int); 92 93 static int 94 xmphy_probe(device_t dev) 95 { 96 struct mii_attach_args *ma = device_get_ivars(dev); 97 const struct mii_phydesc *mpd; 98 99 mpd = mii_phy_match(ma, xmphys); 100 if (mpd != NULL) { 101 device_set_desc(dev, mpd->mpd_name); 102 return (0); 103 } 104 return (ENXIO); 105 } 106 107 static int 108 xmphy_attach(device_t dev) 109 { 110 struct mii_softc *sc; 111 struct mii_attach_args *ma; 112 struct mii_data *mii; 113 const char *sep = ""; 114 115 sc = device_get_softc(dev); 116 ma = device_get_ivars(dev); 117 mii_softc_init(sc, ma); 118 sc->mii_dev = device_get_parent(dev); 119 mii = device_get_softc(sc->mii_dev); 120 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 121 122 sc->mii_inst = mii->mii_instance; 123 sc->mii_service = xmphy_service; 124 sc->mii_reset = mii_phy_reset; 125 sc->mii_pdata = mii; 126 127 sc->mii_flags |= MIIF_NOISOLATE; 128 mii->mii_instance++; 129 130 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 131 #define PRINT(s) kprintf("%s%s", sep, s); sep = ", " 132 133 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 134 BMCR_ISO); 135 #if 0 136 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 137 BMCR_LOOP|BMCR_S100); 138 #endif 139 140 mii_phy_reset(sc); 141 142 device_printf(dev, " "); 143 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst), 144 XMPHY_BMCR_FDX); 145 PRINT("1000baseSX"); 146 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst), 0); 147 PRINT("1000baseSX-FDX"); 148 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0); 149 PRINT("auto"); 150 151 kprintf("\n"); 152 #undef ADD 153 #undef PRINT 154 155 MIIBUS_MEDIAINIT(sc->mii_dev); 156 return(0); 157 } 158 159 static int 160 xmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 161 { 162 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 163 int reg; 164 165 switch (cmd) { 166 case MII_POLLSTAT: 167 /* 168 * If we're not polling our PHY instance, just return. 169 */ 170 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 171 return (0); 172 break; 173 174 case MII_MEDIACHG: 175 /* 176 * If the media indicates a different PHY instance, 177 * isolate ourselves. 178 */ 179 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 180 reg = PHY_READ(sc, MII_BMCR); 181 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 182 return (0); 183 } 184 185 /* 186 * If the interface is not up, don't do anything. 187 */ 188 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 189 break; 190 191 switch (IFM_SUBTYPE(ife->ifm_media)) { 192 case IFM_AUTO: 193 #ifdef foo 194 /* 195 * If we're already in auto mode, just return. 196 */ 197 if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN) 198 return (0); 199 #endif 200 xmphy_mii_phy_auto(sc, 1); 201 break; 202 case IFM_1000_SX: 203 mii_phy_reset(sc); 204 if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) { 205 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX); 206 PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX); 207 } else { 208 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX); 209 PHY_WRITE(sc, XMPHY_MII_BMCR, 0); 210 } 211 break; 212 case IFM_100_T4: 213 case IFM_100_TX: 214 case IFM_10_T: 215 default: 216 return (EINVAL); 217 } 218 break; 219 220 case MII_TICK: 221 /* 222 * If we're not currently selected, just return. 223 */ 224 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 225 return (0); 226 227 /* 228 * Is the interface even up? 229 */ 230 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 231 return (0); 232 233 /* 234 * Only used for autonegotiation. 235 */ 236 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 237 break; 238 239 /* 240 * Check to see if we have link. If we do, we don't 241 * need to restart the autonegotiation process. Read 242 * the BMSR twice in case it's latched. 243 */ 244 reg = PHY_READ(sc, XMPHY_MII_BMSR) | 245 PHY_READ(sc, XMPHY_MII_BMSR); 246 if (reg & XMPHY_BMSR_LINK) { 247 sc->mii_ticks = 0; 248 break; 249 } 250 251 /* 252 * Only retry autonegotiation every mii_anegticks seconds. 253 */ 254 if (++sc->mii_ticks <= sc->mii_anegticks) 255 return (0); 256 257 sc->mii_ticks = 0; 258 259 mii_phy_reset(sc); 260 if (xmphy_mii_phy_auto(sc, 0) == EJUSTRETURN) 261 return(0); 262 break; 263 } 264 265 /* Update the media status. */ 266 xmphy_status(sc); 267 268 /* Callback if something changed. */ 269 mii_phy_update(sc, cmd); 270 return (0); 271 } 272 273 static void 274 xmphy_status(struct mii_softc *sc) 275 { 276 struct mii_data *mii = sc->mii_pdata; 277 int bmsr, bmcr, anlpar; 278 279 mii->mii_media_status = IFM_AVALID; 280 mii->mii_media_active = IFM_ETHER; 281 282 bmsr = PHY_READ(sc, XMPHY_MII_BMSR) | 283 PHY_READ(sc, XMPHY_MII_BMSR); 284 if (bmsr & XMPHY_BMSR_LINK) 285 mii->mii_media_status |= IFM_ACTIVE; 286 287 /* Do dummy read of extended status register. */ 288 bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS); 289 290 bmcr = PHY_READ(sc, XMPHY_MII_BMCR); 291 292 if (bmcr & XMPHY_BMCR_LOOP) 293 mii->mii_media_active |= IFM_LOOP; 294 295 if (bmcr & XMPHY_BMCR_AUTOEN) { 296 if ((bmsr & XMPHY_BMSR_ACOMP) == 0) { 297 if (bmsr & XMPHY_BMSR_LINK) { 298 mii->mii_media_active |= IFM_1000_SX|IFM_HDX; 299 return; 300 } 301 /* Erg, still trying, I guess... */ 302 mii->mii_media_active |= IFM_NONE; 303 return; 304 } 305 306 mii->mii_media_active |= IFM_1000_SX; 307 anlpar = PHY_READ(sc, XMPHY_MII_ANAR) & 308 PHY_READ(sc, XMPHY_MII_ANLPAR); 309 if (anlpar & XMPHY_ANLPAR_FDX) 310 mii->mii_media_active |= IFM_FDX; 311 else 312 mii->mii_media_active |= IFM_HDX; 313 return; 314 } 315 316 mii->mii_media_active |= IFM_1000_SX; 317 if (bmcr & XMPHY_BMCR_FDX) 318 mii->mii_media_active |= IFM_FDX; 319 else 320 mii->mii_media_active |= IFM_HDX; 321 } 322 323 static int 324 xmphy_mii_phy_auto(struct mii_softc *sc, int waitfor) 325 { 326 int bmsr, anar = 0, i; 327 328 anar = PHY_READ(sc, XMPHY_MII_ANAR); 329 anar |= XMPHY_ANAR_FDX | XMPHY_ANAR_HDX; 330 PHY_WRITE(sc, XMPHY_MII_ANAR, anar); 331 DELAY(1000); 332 PHY_WRITE(sc, XMPHY_MII_BMCR, 333 XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG); 334 335 if (waitfor) { 336 /* Wait 500ms for it to complete. */ 337 for (i = 0; i < 500; i++) { 338 bmsr = PHY_READ(sc, XMPHY_MII_BMSR); 339 if (bmsr & XMPHY_BMSR_ACOMP) 340 return (0); 341 DELAY(1000); 342 } 343 return (EIO); 344 } 345 return (EJUSTRETURN); 346 } 347