bmtphy.c revision 164827
1/*- 2 * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 7 * NASA Ames Research Center. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the NetBSD 20 * Foundation, Inc. and its contributors. 21 * 4. Neither the name of The NetBSD Foundation nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38/* 39 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * This product includes software developed by Manuel Bouyer. 52 * 4. The name of the author may not be used to endorse or promote products 53 * derived from this software without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 56 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 57 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 58 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 59 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 60 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 64 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 * from: NetBSD: bmtphy.c,v 1.8 2002/07/03 06:25:50 simonb Exp 67 * 68 */ 69 70#include <sys/cdefs.h> 71__FBSDID("$FreeBSD: head/sys/dev/mii/bmtphy.c 164827 2006-12-02 15:32:34Z marius $"); 72 73/* 74 * Driver for the Broadcom BCM5201/BCM5202 "Mini-Theta" PHYs. This also 75 * drives the PHY on the 3Com 3c905C. The 3c905C's PHY is described in 76 * the 3c905C data sheet. 77 */ 78 79#include <sys/param.h> 80#include <sys/systm.h> 81#include <sys/kernel.h> 82#include <sys/module.h> 83#include <sys/socket.h> 84#include <sys/bus.h> 85 86#include <net/if.h> 87#include <net/if_media.h> 88 89#include <dev/mii/mii.h> 90#include <dev/mii/miivar.h> 91#include "miidevs.h" 92 93#include <dev/mii/bmtphyreg.h> 94 95#include "miibus_if.h" 96 97static int bmtphy_probe(device_t); 98static int bmtphy_attach(device_t); 99 100static device_method_t bmtphy_methods[] = { 101 /* Device interface */ 102 DEVMETHOD(device_probe, bmtphy_probe), 103 DEVMETHOD(device_attach, bmtphy_attach), 104 DEVMETHOD(device_detach, mii_phy_detach), 105 DEVMETHOD(device_shutdown, bus_generic_shutdown), 106 107 { 0, 0 } 108}; 109 110static devclass_t bmtphy_devclass; 111 112static driver_t bmtphy_driver = { 113 "bmtphy", 114 bmtphy_methods, 115 sizeof(struct mii_softc) 116}; 117 118DRIVER_MODULE(bmtphy, miibus, bmtphy_driver, bmtphy_devclass, 0, 0); 119 120static int bmtphy_service(struct mii_softc *, struct mii_data *, int); 121static void bmtphy_status(struct mii_softc *); 122 123static const struct mii_phydesc bmtphys_dp[] = { 124 MII_PHY_DESC(BROADCOM, BCM4401), 125 MII_PHY_DESC(BROADCOM, BCM5201), 126 MII_PHY_DESC(BROADCOM, BCM5221), 127 MII_PHY_END 128}; 129 130static const struct mii_phydesc bmtphys_lp[] = { 131 MII_PHY_DESC(BROADCOM, 3C905B), 132 MII_PHY_DESC(BROADCOM, 3C905C), 133 MII_PHY_END 134}; 135 136static int 137bmtphy_probe(device_t dev) 138{ 139 int rval; 140 141 /* Let exphy(4) take precedence for these. */ 142 rval = mii_phy_dev_probe(dev, bmtphys_lp, BUS_PROBE_LOW_PRIORITY); 143 if (rval <= 0) 144 return (rval); 145 146 return (mii_phy_dev_probe(dev, bmtphys_dp, BUS_PROBE_DEFAULT)); 147} 148 149static int 150bmtphy_attach(device_t dev) 151{ 152 struct mii_softc *sc; 153 struct mii_attach_args *ma; 154 struct mii_data *mii; 155 156 sc = device_get_softc(dev); 157 ma = device_get_ivars(dev); 158 sc->mii_dev = device_get_parent(dev); 159 mii = device_get_softc(sc->mii_dev); 160 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 161 162 sc->mii_inst = mii->mii_instance; 163 sc->mii_phy = ma->mii_phyno; 164 sc->mii_service = bmtphy_service; 165 sc->mii_pdata = mii; 166 167 mii_phy_reset(sc); 168 169 mii->mii_instance++; 170 171 sc->mii_capabilities = 172 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 173 device_printf(dev, " "); 174 mii_phy_add_media(sc); 175 printf("\n"); 176 177 MIIBUS_MEDIAINIT(sc->mii_dev); 178 179 return (0); 180} 181 182static int 183bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 184{ 185 struct ifmedia_entry *ife; 186 int reg; 187 188 ife = mii->mii_media.ifm_cur; 189 190 switch (cmd) { 191 case MII_POLLSTAT: 192 /* 193 * If we're not polling our PHY instance, just return. 194 */ 195 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 196 return (0); 197 break; 198 199 case MII_MEDIACHG: 200 /* 201 * If the media indicates a different PHY instance, 202 * isolate ourselves. 203 */ 204 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 205 reg = PHY_READ(sc, MII_BMCR); 206 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 207 return (0); 208 } 209 210 /* 211 * If the interface is not up, don't do anything. 212 */ 213 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 214 break; 215 216 mii_phy_setmedia(sc); 217 break; 218 219 case MII_TICK: 220 /* 221 * If we're not currently selected, just return. 222 */ 223 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 224 return (0); 225 if (mii_phy_tick(sc) == EJUSTRETURN) 226 return (0); 227 break; 228 } 229 230 /* Update the media status. */ 231 bmtphy_status(sc); 232 233 /* Callback if something changed. */ 234 mii_phy_update(sc, cmd); 235 236 return (0); 237} 238 239static void 240bmtphy_status(struct mii_softc *sc) 241{ 242 struct mii_data *mii; 243 struct ifmedia_entry *ife; 244 int bmsr, bmcr, aux_csr; 245 246 mii = sc->mii_pdata; 247 ife = mii->mii_media.ifm_cur; 248 249 mii->mii_media_status = IFM_AVALID; 250 mii->mii_media_active = IFM_ETHER; 251 252 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 253 aux_csr = PHY_READ(sc, MII_BMTPHY_AUX_CSR); 254 255 if (bmsr & BMSR_LINK) 256 mii->mii_media_status |= IFM_ACTIVE; 257 258 bmcr = PHY_READ(sc, MII_BMCR); 259 if (bmcr & BMCR_ISO) { 260 mii->mii_media_active |= IFM_NONE; 261 mii->mii_media_status = 0; 262 return; 263 } 264 265 if (bmcr & BMCR_LOOP) 266 mii->mii_media_active |= IFM_LOOP; 267 268 if (bmcr & BMCR_AUTOEN) { 269 /* 270 * The media status bits are only valid if autonegotiation 271 * has completed (or it's disabled). 272 */ 273 if ((bmsr & BMSR_ACOMP) == 0) { 274 /* Erg, still trying, I guess... */ 275 mii->mii_media_active |= IFM_NONE; 276 return; 277 } 278 279 if (aux_csr & AUX_CSR_SPEED) 280 mii->mii_media_active |= IFM_100_TX; 281 else 282 mii->mii_media_active |= IFM_10_T; 283 if (aux_csr & AUX_CSR_FDX) 284 mii->mii_media_active |= IFM_FDX; 285 } else 286 mii->mii_media_active = ife->ifm_media; 287} 288