ruephy.c revision 213364
1275970Scy/*- 2275970Scy * Copyright (c) 2001-2003, Shunsuke Akiyama <akiyama@FreeBSD.org>. 3275970Scy * All rights reserved. 4275970Scy * 5316722Sdelphij * Redistribution and use in source and binary forms, with or without 6275970Scy * modification, are permitted provided that the following conditions 7275970Scy * are met: 8275970Scy * 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 213364 2010-10-02 18:53:12Z marius $"); 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/module.h> 40#include <sys/socket.h> 41#include <sys/bus.h> 42 43#include <net/if.h> 44#include <net/if_arp.h> 45#include <net/if_media.h> 46 47#include <dev/mii/mii.h> 48#include <dev/mii/miivar.h> 49#include "miidevs.h" 50 51#include <machine/bus.h> 52#include <dev/mii/ruephyreg.h> 53 54#include "miibus_if.h" 55 56static int ruephy_probe(device_t); 57static int ruephy_attach(device_t); 58 59static device_method_t ruephy_methods[] = { 60 /* device interface */ 61 DEVMETHOD(device_probe, ruephy_probe), 62 DEVMETHOD(device_attach, ruephy_attach), 63 DEVMETHOD(device_detach, mii_phy_detach), 64 DEVMETHOD(device_shutdown, bus_generic_shutdown), 65 { 0, 0 } 66}; 67 68static devclass_t ruephy_devclass; 69 70static driver_t ruephy_driver = { 71 "ruephy", 72 ruephy_methods, 73 sizeof(struct mii_softc) 74}; 75 76DRIVER_MODULE(ruephy, miibus, ruephy_driver, ruephy_devclass, 0, 0); 77 78static int ruephy_service(struct mii_softc *, struct mii_data *, int); 79static void ruephy_reset(struct mii_softc *); 80static void ruephy_status(struct mii_softc *); 81 82/* 83 * The RealTek RTL8150 internal PHY doesn't have vendor/device ID 84 * registers; rue(4) fakes up a return value of all zeros. 85 */ 86static const struct mii_phydesc ruephys[] = { 87 { 0, 0, "RealTek RTL8150 internal media interface" }, 88 MII_PHY_END 89}; 90 91static int 92ruephy_probe(device_t dev) 93{ 94 95 if (strcmp(device_get_name(device_get_parent(device_get_parent(dev))), 96 "rue") == 0) 97 return (mii_phy_dev_probe(dev, ruephys, BUS_PROBE_DEFAULT)); 98 return (ENXIO); 99} 100 101static int 102ruephy_attach(device_t dev) 103{ 104 struct mii_softc *sc; 105 struct mii_attach_args *ma; 106 struct mii_data *mii; 107 108 sc = device_get_softc(dev); 109 ma = device_get_ivars(dev); 110 sc->mii_dev = device_get_parent(dev); 111 mii = ma->mii_data; 112 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 113 114 sc->mii_inst = mii->mii_instance++; 115 sc->mii_phy = ma->mii_phyno; 116 sc->mii_service = ruephy_service; 117 sc->mii_pdata = mii; 118 119 /* 120 * Apparently, we can neither isolate nor do loopback on this PHY. 121 */ 122 sc->mii_flags |= MIIF_NOISOLATE | MIIF_NOLOOP; 123 124 ruephy_reset(sc); 125 126 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 127 device_printf(dev, " "); 128 mii_phy_add_media(sc); 129 printf("\n"); 130 131 MIIBUS_MEDIAINIT(sc->mii_dev); 132 return (0); 133} 134 135static int 136ruephy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 137{ 138 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 139 int reg; 140 141 switch (cmd) { 142 case MII_POLLSTAT: 143 break; 144 145 case MII_MEDIACHG: 146 /* 147 * If the interface is not up, don't do anything. 148 */ 149 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 150 break; 151 152 mii_phy_setmedia(sc); 153 break; 154 155 case MII_TICK: 156 /* 157 * Is the interface even up? 158 */ 159 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 160 return (0); 161 162 /* 163 * Only used for autonegotiation. 164 */ 165 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 166 break; 167 168 /* 169 * Check to see if we have link. If we do, we don't 170 * need to restart the autonegotiation process. Read 171 * the MSR twice in case it's latched. 172 */ 173 reg = PHY_READ(sc, RUEPHY_MII_MSR) | 174 PHY_READ(sc, RUEPHY_MII_MSR); 175 if (reg & RUEPHY_MSR_LINK) 176 break; 177 178 /* Only retry autonegotiation every mii_anegticks seconds. */ 179 if (sc->mii_ticks <= sc->mii_anegticks) 180 break; 181 182 sc->mii_ticks = 0; 183 ruephy_reset(sc); 184 if (mii_phy_auto(sc) == EJUSTRETURN) 185 return (0); 186 break; 187 } 188 189 /* Update the media status. */ 190 ruephy_status(sc); 191 192 /* Callback if something changed. */ 193 mii_phy_update(sc, cmd); 194 195 return (0); 196} 197 198static void 199ruephy_reset(struct mii_softc *sc) 200{ 201 202 mii_phy_reset(sc); 203 204 /* 205 * XXX RealTek RTL8150 PHY doesn't set the BMCR properly after 206 * XXX reset, which breaks autonegotiation. 207 */ 208 PHY_WRITE(sc, MII_BMCR, (BMCR_S100 | BMCR_AUTOEN | BMCR_FDX)); 209} 210 211static void 212ruephy_status(struct mii_softc *phy) 213{ 214 struct mii_data *mii = phy->mii_pdata; 215 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 216 int bmsr, bmcr, msr; 217 218 mii->mii_media_status = IFM_AVALID; 219 mii->mii_media_active = IFM_ETHER; 220 221 msr = PHY_READ(phy, RUEPHY_MII_MSR) | PHY_READ(phy, RUEPHY_MII_MSR); 222 if (msr & RUEPHY_MSR_LINK) 223 mii->mii_media_status |= IFM_ACTIVE; 224 225 bmcr = PHY_READ(phy, MII_BMCR); 226 if (bmcr & BMCR_ISO) { 227 mii->mii_media_active |= IFM_NONE; 228 mii->mii_media_status = 0; 229 return; 230 } 231 232 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 233 if (bmcr & BMCR_AUTOEN) { 234 if ((bmsr & BMSR_ACOMP) == 0) { 235 /* Erg, still trying, I guess... */ 236 mii->mii_media_active |= IFM_NONE; 237 return; 238 } 239 240 if (msr & RUEPHY_MSR_SPEED100) 241 mii->mii_media_active |= IFM_100_TX; 242 else 243 mii->mii_media_active |= IFM_10_T; 244 245 if (msr & RUEPHY_MSR_DUPLEX) 246 mii->mii_media_active |= IFM_FDX; 247 } else 248 mii->mii_media_active = ife->ifm_media; 249} 250