bmtphy.c revision 213229
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 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31/* 32 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 43 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 44 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 45 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 46 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 47 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 48 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 49 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 50 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 51 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 52 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 53 * 54 * from: NetBSD: bmtphy.c,v 1.8 2002/07/03 06:25:50 simonb Exp 55 * 56 */ 57 58#include <sys/cdefs.h> 59__FBSDID("$FreeBSD: head/sys/dev/mii/bmtphy.c 213229 2010-09-27 20:31:03Z marius $"); 60 61/* 62 * Driver for the Broadcom BCM5201/BCM5202 "Mini-Theta" PHYs. This also 63 * drives the PHY on the 3Com 3c905C. The 3c905C's PHY is described in 64 * the 3c905C data sheet. 65 */ 66 67#include <sys/param.h> 68#include <sys/systm.h> 69#include <sys/kernel.h> 70#include <sys/module.h> 71#include <sys/socket.h> 72#include <sys/bus.h> 73 74#include <net/if.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/bmtphyreg.h> 82 83#include "miibus_if.h" 84 85static int bmtphy_probe(device_t); 86static int bmtphy_attach(device_t); 87 88static device_method_t bmtphy_methods[] = { 89 /* Device interface */ 90 DEVMETHOD(device_probe, bmtphy_probe), 91 DEVMETHOD(device_attach, bmtphy_attach), 92 DEVMETHOD(device_detach, mii_phy_detach), 93 DEVMETHOD(device_shutdown, bus_generic_shutdown), 94 95 { 0, 0 } 96}; 97 98static devclass_t bmtphy_devclass; 99 100static driver_t bmtphy_driver = { 101 "bmtphy", 102 bmtphy_methods, 103 sizeof(struct mii_softc) 104}; 105 106DRIVER_MODULE(bmtphy, miibus, bmtphy_driver, bmtphy_devclass, 0, 0); 107 108static int bmtphy_service(struct mii_softc *, struct mii_data *, int); 109static void bmtphy_status(struct mii_softc *); 110 111static const struct mii_phydesc bmtphys_dp[] = { 112 MII_PHY_DESC(BROADCOM, BCM4401), 113 MII_PHY_DESC(BROADCOM, BCM5201), 114 MII_PHY_DESC(BROADCOM, BCM5221), 115 MII_PHY_END 116}; 117 118static const struct mii_phydesc bmtphys_lp[] = { 119 MII_PHY_DESC(BROADCOM, 3C905B), 120 MII_PHY_DESC(BROADCOM, 3C905C), 121 MII_PHY_END 122}; 123 124static int 125bmtphy_probe(device_t dev) 126{ 127 int rval; 128 129 /* Let exphy(4) take precedence for these. */ 130 rval = mii_phy_dev_probe(dev, bmtphys_lp, BUS_PROBE_LOW_PRIORITY); 131 if (rval <= 0) 132 return (rval); 133 134 return (mii_phy_dev_probe(dev, bmtphys_dp, BUS_PROBE_DEFAULT)); 135} 136 137static int 138bmtphy_attach(device_t dev) 139{ 140 struct mii_softc *sc; 141 struct mii_attach_args *ma; 142 struct mii_data *mii; 143 144 sc = device_get_softc(dev); 145 ma = device_get_ivars(dev); 146 sc->mii_dev = device_get_parent(dev); 147 mii = ma->mii_data; 148 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 149 150 sc->mii_inst = mii->mii_instance; 151 sc->mii_phy = ma->mii_phyno; 152 sc->mii_service = bmtphy_service; 153 sc->mii_pdata = mii; 154 155 mii_phy_reset(sc); 156 157 mii->mii_instance++; 158 159 sc->mii_capabilities = 160 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 161 device_printf(dev, " "); 162 mii_phy_add_media(sc); 163 printf("\n"); 164 165 MIIBUS_MEDIAINIT(sc->mii_dev); 166 167 return (0); 168} 169 170static int 171bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 172{ 173 struct ifmedia_entry *ife; 174 int reg; 175 176 ife = mii->mii_media.ifm_cur; 177 178 switch (cmd) { 179 case MII_POLLSTAT: 180 /* 181 * If we're not polling our PHY instance, just return. 182 */ 183 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 184 return (0); 185 break; 186 187 case MII_MEDIACHG: 188 /* 189 * If the media indicates a different PHY instance, 190 * isolate ourselves. 191 */ 192 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 193 reg = PHY_READ(sc, MII_BMCR); 194 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 195 return (0); 196 } 197 198 /* 199 * If the interface is not up, don't do anything. 200 */ 201 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 202 break; 203 204 mii_phy_setmedia(sc); 205 break; 206 207 case MII_TICK: 208 /* 209 * If we're not currently selected, just return. 210 */ 211 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 212 return (0); 213 if (mii_phy_tick(sc) == EJUSTRETURN) 214 return (0); 215 break; 216 } 217 218 /* Update the media status. */ 219 bmtphy_status(sc); 220 221 /* Callback if something changed. */ 222 mii_phy_update(sc, cmd); 223 224 return (0); 225} 226 227static void 228bmtphy_status(struct mii_softc *sc) 229{ 230 struct mii_data *mii; 231 struct ifmedia_entry *ife; 232 int bmsr, bmcr, aux_csr; 233 234 mii = sc->mii_pdata; 235 ife = mii->mii_media.ifm_cur; 236 237 mii->mii_media_status = IFM_AVALID; 238 mii->mii_media_active = IFM_ETHER; 239 240 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 241 aux_csr = PHY_READ(sc, MII_BMTPHY_AUX_CSR); 242 243 if (bmsr & BMSR_LINK) 244 mii->mii_media_status |= IFM_ACTIVE; 245 246 bmcr = PHY_READ(sc, MII_BMCR); 247 if (bmcr & BMCR_ISO) { 248 mii->mii_media_active |= IFM_NONE; 249 mii->mii_media_status = 0; 250 return; 251 } 252 253 if (bmcr & BMCR_LOOP) 254 mii->mii_media_active |= IFM_LOOP; 255 256 if (bmcr & BMCR_AUTOEN) { 257 /* 258 * The media status bits are only valid if autonegotiation 259 * has completed (or it's disabled). 260 */ 261 if ((bmsr & BMSR_ACOMP) == 0) { 262 /* Erg, still trying, I guess... */ 263 mii->mii_media_active |= IFM_NONE; 264 return; 265 } 266 267 if (aux_csr & AUX_CSR_SPEED) 268 mii->mii_media_active |= IFM_100_TX; 269 else 270 mii->mii_media_active |= IFM_10_T; 271 if (aux_csr & AUX_CSR_FDX) 272 mii->mii_media_active |= IFM_FDX; 273 } else 274 mii->mii_media_active = ife->ifm_media; 275} 276