amphy.c revision 139749
1/*- 2 * Copyright (c) 1997, 1998, 1999 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 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: head/sys/dev/mii/amphy.c 139749 2005-01-06 01:43:34Z imp $"); 35 36/* 37 * driver for AMD AM79c873 PHYs 38 * This driver also works for the Davicom DM9101 PHY, which appears to 39 * be an AM79c873 workalike. 40 */ 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/kernel.h> 45#include <sys/module.h> 46#include <sys/socket.h> 47#include <sys/bus.h> 48 49#include <net/if.h> 50#include <net/if_media.h> 51 52#include <dev/mii/mii.h> 53#include <dev/mii/miivar.h> 54#include "miidevs.h" 55 56#include <dev/mii/amphyreg.h> 57 58#include "miibus_if.h" 59 60static int amphy_probe(device_t); 61static int amphy_attach(device_t); 62 63static device_method_t amphy_methods[] = { 64 /* device interface */ 65 DEVMETHOD(device_probe, amphy_probe), 66 DEVMETHOD(device_attach, amphy_attach), 67 DEVMETHOD(device_detach, mii_phy_detach), 68 DEVMETHOD(device_shutdown, bus_generic_shutdown), 69 { 0, 0 } 70}; 71 72static devclass_t amphy_devclass; 73 74static driver_t amphy_driver = { 75 "amphy", 76 amphy_methods, 77 sizeof(struct mii_softc) 78}; 79 80DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0); 81 82static int amphy_service(struct mii_softc *, struct mii_data *, int); 83static void amphy_status(struct mii_softc *); 84 85static int 86amphy_probe(dev) 87 device_t dev; 88{ 89 struct mii_attach_args *ma; 90 91 ma = device_get_ivars(dev); 92 93 if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxAMD || 94 MII_MODEL(ma->mii_id2) != MII_MODEL_xxAMD_79C873) && 95 (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxDAVICOM || 96 MII_MODEL(ma->mii_id2) != MII_MODEL_xxDAVICOM_DM9101)) 97 return(ENXIO); 98 99 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxAMD) 100 device_set_desc(dev, MII_STR_xxAMD_79C873); 101 else if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDAVICOM) 102 device_set_desc(dev, MII_STR_xxDAVICOM_DM9101); 103 104 return(0); 105} 106 107static int 108amphy_attach(dev) 109 device_t dev; 110{ 111 struct mii_softc *sc; 112 struct mii_attach_args *ma; 113 struct mii_data *mii; 114 115 sc = device_get_softc(dev); 116 ma = device_get_ivars(dev); 117 sc->mii_dev = device_get_parent(dev); 118 mii = device_get_softc(sc->mii_dev); 119 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 120 121 sc->mii_inst = mii->mii_instance; 122 sc->mii_phy = ma->mii_phyno; 123 sc->mii_service = amphy_service; 124 sc->mii_pdata = mii; 125 126 sc->mii_flags |= MIIF_NOISOLATE; 127 mii->mii_instance++; 128 129#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 130 131 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 132 BMCR_ISO); 133#if 0 134 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 135 BMCR_LOOP|BMCR_S100); 136#endif 137 138 mii_phy_reset(sc); 139 140 sc->mii_capabilities = 141 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 142 device_printf(dev, " "); 143 mii_add_media(sc); 144 printf("\n"); 145#undef ADD 146 MIIBUS_MEDIAINIT(sc->mii_dev); 147 return(0); 148} 149 150static int 151amphy_service(sc, mii, cmd) 152 struct mii_softc *sc; 153 struct mii_data *mii; 154 int cmd; 155{ 156 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 157 int reg; 158 159 switch (cmd) { 160 case MII_POLLSTAT: 161 /* 162 * If we're not polling our PHY instance, just return. 163 */ 164 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 165 return (0); 166 break; 167 168 case MII_MEDIACHG: 169 /* 170 * If the media indicates a different PHY instance, 171 * isolate ourselves. 172 */ 173 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 174 reg = PHY_READ(sc, MII_BMCR); 175 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 176 return (0); 177 } 178 179 /* 180 * If the interface is not up, don't do anything. 181 */ 182 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 183 break; 184 185 switch (IFM_SUBTYPE(ife->ifm_media)) { 186 case IFM_AUTO: 187 /* 188 * If we're already in auto mode, just return. 189 */ 190 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 191 return (0); 192 (void) mii_phy_auto(sc); 193 break; 194 case IFM_100_T4: 195 /* 196 * XXX Not supported as a manual setting right now. 197 */ 198 return (EINVAL); 199 default: 200 /* 201 * BMCR data is stored in the ifmedia entry. 202 */ 203 PHY_WRITE(sc, MII_ANAR, 204 mii_anar(ife->ifm_media)); 205 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 206 } 207 break; 208 209 case MII_TICK: 210 /* 211 * If we're not currently selected, just return. 212 */ 213 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 214 return (0); 215 if (mii_phy_tick(sc) == EJUSTRETURN) 216 return (0); 217 break; 218 } 219 220 /* Update the media status. */ 221 amphy_status(sc); 222 223 /* Callback if something changed. */ 224 mii_phy_update(sc, cmd); 225 return (0); 226} 227 228static void 229amphy_status(sc) 230 struct mii_softc *sc; 231{ 232 struct mii_data *mii = sc->mii_pdata; 233 int bmsr, bmcr, par, anlpar; 234 235 mii->mii_media_status = IFM_AVALID; 236 mii->mii_media_active = IFM_ETHER; 237 238 bmsr = PHY_READ(sc, MII_BMSR) | 239 PHY_READ(sc, MII_BMSR); 240 if (bmsr & BMSR_LINK) 241 mii->mii_media_status |= IFM_ACTIVE; 242 243 bmcr = PHY_READ(sc, MII_BMCR); 244 if (bmcr & BMCR_ISO) { 245 mii->mii_media_active |= IFM_NONE; 246 mii->mii_media_status = 0; 247 return; 248 } 249 250 if (bmcr & BMCR_LOOP) 251 mii->mii_media_active |= IFM_LOOP; 252 253 if (bmcr & BMCR_AUTOEN) { 254 /* 255 * The PAR status bits are only valid of autonegotiation 256 * has completed (or it's disabled). 257 */ 258 if ((bmsr & BMSR_ACOMP) == 0) { 259 /* Erg, still trying, I guess... */ 260 mii->mii_media_active |= IFM_NONE; 261 return; 262 } 263 264 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 265 anlpar = PHY_READ(sc, MII_ANAR) & 266 PHY_READ(sc, MII_ANLPAR); 267 if (anlpar & ANLPAR_T4) 268 mii->mii_media_active |= IFM_100_T4; 269 else if (anlpar & ANLPAR_TX_FD) 270 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 271 else if (anlpar & ANLPAR_TX) 272 mii->mii_media_active |= IFM_100_TX; 273 else if (anlpar & ANLPAR_10_FD) 274 mii->mii_media_active |= IFM_10_T|IFM_FDX; 275 else if (anlpar & ANLPAR_10) 276 mii->mii_media_active |= IFM_10_T; 277 else 278 mii->mii_media_active |= IFM_NONE; 279 return; 280 } 281 282 /* 283 * Link partner is not capable of autonegotiation. 284 */ 285 par = PHY_READ(sc, MII_AMPHY_DSCSR); 286 if (par & DSCSR_100FDX) 287 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 288 else if (par & DSCSR_100HDX) 289 mii->mii_media_active |= IFM_100_TX; 290 else if (par & DSCSR_10FDX) 291 mii->mii_media_active |= IFM_10_T|IFM_HDX; 292 else if (par & DSCSR_10HDX) 293 mii->mii_media_active |= IFM_10_T; 294 } else 295 mii->mii_media_active = mii_media_from_bmcr(bmcr); 296} 297