ruephy.c revision 128870
1/*- 2 * Copyright (c) 2001-2003, Shunsuke Akiyama <akiyama@FreeBSD.org>. 3 * 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD: head/sys/dev/mii/ruephy.c 128870 2004-05-03 13:01:34Z andre $"); 30 31/* 32 * driver for RealTek RTL8150 internal PHY 33 */ 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/kernel.h> 38#include <sys/malloc.h> 39#include <sys/socket.h> 40#include <sys/bus.h> 41 42#include <net/if.h> 43#include <net/if_arp.h> 44#include <net/if_media.h> 45 46#include <dev/mii/mii.h> 47#include <dev/mii/miivar.h> 48#include "miidevs.h" 49 50#include <machine/bus.h> 51#include <dev/mii/ruephyreg.h> 52 53#include "miibus_if.h" 54 55static int ruephy_probe(device_t); 56static int ruephy_attach(device_t); 57 58static device_method_t ruephy_methods[] = { 59 /* device interface */ 60 DEVMETHOD(device_probe, ruephy_probe), 61 DEVMETHOD(device_attach, ruephy_attach), 62 DEVMETHOD(device_detach, mii_phy_detach), 63 DEVMETHOD(device_shutdown, bus_generic_shutdown), 64 { 0, 0 } 65}; 66 67static devclass_t ruephy_devclass; 68 69static driver_t ruephy_driver = { 70 "ruephy", 71 ruephy_methods, 72 sizeof(struct mii_softc) 73}; 74 75DRIVER_MODULE(ruephy, miibus, ruephy_driver, ruephy_devclass, 0, 0); 76 77static int ruephy_service(struct mii_softc *, struct mii_data *, int); 78static void ruephy_reset(struct mii_softc *); 79static void ruephy_status(struct mii_softc *); 80 81static int 82ruephy_probe(device_t dev) 83{ 84 struct mii_attach_args *ma; 85 device_t parent; 86 87 ma = device_get_ivars(dev); 88 parent = device_get_parent(device_get_parent(dev)); 89 90 /* 91 * RealTek RTL8150 PHY doesn't have vendor/device ID registers: 92 * the rue driver fakes up a return value of all zeros. 93 */ 94 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 || 95 MII_MODEL(ma->mii_id2) != 0) 96 return (ENXIO); 97 98 /* 99 * Make sure the parent is an 'rue'. 100 */ 101 if (strcmp(device_get_name(parent), "rue") != 0) 102 return (ENXIO); 103 104 device_set_desc(dev, "RealTek RTL8150 internal media interface"); 105 106 return (0); 107} 108 109static int 110ruephy_attach(device_t dev) 111{ 112 struct mii_softc *sc; 113 struct mii_attach_args *ma; 114 struct mii_data *mii; 115 116 sc = device_get_softc(dev); 117 ma = device_get_ivars(dev); 118 sc->mii_dev = device_get_parent(dev); 119 mii = device_get_softc(sc->mii_dev); 120 121 /* 122 * The RealTek PHY can never be isolated, so never allow non-zero 123 * instances! 124 */ 125 if (mii->mii_instance != 0) { 126 device_printf(dev, "ignoring this PHY, non-zero instance\n"); 127 return (ENXIO); 128 } 129 130 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 131 132 sc->mii_inst = mii->mii_instance; 133 sc->mii_phy = ma->mii_phyno; 134 sc->mii_service = ruephy_service; 135 sc->mii_pdata = mii; 136 mii->mii_instance++; 137 138 sc->mii_flags |= MIIF_NOISOLATE; 139 140#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 141 142 ruephy_reset(sc); 143 144 sc->mii_capabilities = 145 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 146 device_printf(dev, " "); 147 mii_phy_add_media(sc); 148 printf("\n"); 149#undef ADD 150 151 MIIBUS_MEDIAINIT(sc->mii_dev); 152 return (0); 153} 154 155static int 156ruephy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 157{ 158 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 159 int reg; 160 161 /* 162 * We can't isolate the RealTek RTL8150 PHY, 163 * so it has to be the only one! 164 */ 165 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 166 panic("ruephy_service: can't isolate RealTek RTL8150 PHY"); 167 168 switch (cmd) { 169 case MII_POLLSTAT: 170 break; 171 172 case MII_MEDIACHG: 173 /* 174 * If the interface is not up, don't do anything. 175 */ 176 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 177 break; 178 179 switch (IFM_SUBTYPE(ife->ifm_media)) { 180 case IFM_AUTO: 181 /* 182 * If we're already in auto mode, just return. 183 */ 184 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 185 return (0); 186 (void) mii_phy_auto(sc); 187 break; 188 case IFM_100_T4: 189 /* 190 * XXX Not supported as a manual setting right now. 191 */ 192 return (EINVAL); 193 default: 194 /* 195 * BMCR data is stored in the ifmedia entry. 196 */ 197 PHY_WRITE(sc, MII_ANAR, 198 mii_anar(ife->ifm_media)); 199 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 200 } 201 break; 202 203 case MII_TICK: 204 /* 205 * Is the interface even up? 206 */ 207 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 208 return (0); 209 210 /* 211 * Only used for autonegotiation. 212 */ 213 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 214 break; 215 216 /* 217 * Check to see if we have link. If we do, we don't 218 * need to restart the autonegotiation process. Read 219 * the MSR twice in case it's latched. 220 */ 221 reg = PHY_READ(sc, RUEPHY_MII_MSR) | 222 PHY_READ(sc, RUEPHY_MII_MSR); 223 if (reg & RUEPHY_MSR_LINK) 224 break; 225 226 /* 227 * Only retry autonegotiation every 5 seconds. 228 */ 229 if (++sc->mii_ticks <= 5) 230 break; 231 232 sc->mii_ticks = 0; 233 ruephy_reset(sc); 234 if (mii_phy_auto(sc) == EJUSTRETURN) 235 return (0); 236 break; 237 } 238 239 /* Update the media status. */ 240 ruephy_status(sc); 241 242 /* Callback if something changed. */ 243 mii_phy_update(sc, cmd); 244 245 return (0); 246} 247 248static void 249ruephy_reset(struct mii_softc *sc) 250{ 251 252 mii_phy_reset(sc); 253 254 /* 255 * XXX RealTek RTL8150 PHY doesn't set the BMCR properly after 256 * XXX reset, which breaks autonegotiation. 257 */ 258 PHY_WRITE(sc, MII_BMCR, (BMCR_S100 | BMCR_AUTOEN | BMCR_FDX)); 259} 260 261static void 262ruephy_status(struct mii_softc *phy) 263{ 264 struct mii_data *mii = phy->mii_pdata; 265 int bmsr, bmcr, msr; 266 267 mii->mii_media_status = IFM_AVALID; 268 mii->mii_media_active = IFM_ETHER; 269 270 msr = PHY_READ(phy, RUEPHY_MII_MSR) | PHY_READ(phy, RUEPHY_MII_MSR); 271 if (msr & RUEPHY_MSR_LINK) 272 mii->mii_media_status |= IFM_ACTIVE; 273 274 bmcr = PHY_READ(phy, MII_BMCR); 275 if (bmcr & BMCR_ISO) { 276 mii->mii_media_active |= IFM_NONE; 277 mii->mii_media_status = 0; 278 return; 279 } 280 281 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 282 283 if (bmcr & BMCR_AUTOEN) { 284 if ((bmsr & BMSR_ACOMP) == 0) { 285 /* Erg, still trying, I guess... */ 286 mii->mii_media_active |= IFM_NONE; 287 return; 288 } 289 290 if (msr & RUEPHY_MSR_SPEED100) 291 mii->mii_media_active |= IFM_100_TX; 292 else 293 mii->mii_media_active |= IFM_10_T; 294 295 if (msr & RUEPHY_MSR_DUPLEX) 296 mii->mii_media_active |= IFM_FDX; 297 } else 298 mii->mii_media_active = mii_media_from_bmcr(bmcr); 299} 300