rlphy.c revision 213384
1/*- 2 * Copyright (c) 1997, 1998, 1999 3 * Bill Paul <wpaul@ctr.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/rlphy.c 213384 2010-10-03 17:00:57Z marius $"); 35 36/* 37 * driver for RealTek 8139 internal PHYs 38 */ 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/kernel.h> 43#include <sys/module.h> 44#include <sys/socket.h> 45#include <sys/bus.h> 46 47#include <net/if.h> 48#include <net/if_arp.h> 49#include <net/if_media.h> 50 51#include <dev/mii/mii.h> 52#include <dev/mii/miivar.h> 53#include "miidevs.h" 54 55#include <machine/bus.h> 56#include <pci/if_rlreg.h> 57 58#include "miibus_if.h" 59 60struct rlphy_softc { 61 struct mii_softc sc_mii; /* generic PHY */ 62 int sc_is_RTL8201L; /* is an external RTL8201L PHY */ 63}; 64 65static int rlphy_probe(device_t); 66static int rlphy_attach(device_t); 67 68static device_method_t rlphy_methods[] = { 69 /* device interface */ 70 DEVMETHOD(device_probe, rlphy_probe), 71 DEVMETHOD(device_attach, rlphy_attach), 72 DEVMETHOD(device_detach, mii_phy_detach), 73 DEVMETHOD(device_shutdown, bus_generic_shutdown), 74 { 0, 0 } 75}; 76 77static devclass_t rlphy_devclass; 78 79static driver_t rlphy_driver = { 80 "rlphy", 81 rlphy_methods, 82 sizeof(struct rlphy_softc) 83}; 84 85DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0); 86 87static int rlphy_service(struct mii_softc *, struct mii_data *, int); 88static void rlphy_status(struct mii_softc *); 89 90/* 91 * RealTek internal PHYs don't have vendor/device ID registers; 92 * re(4) and rl(4) fake up a return value of all zeros. 93 */ 94static const struct mii_phydesc rlintphys[] = { 95 { 0, 0, "RealTek internal media interface" }, 96 MII_PHY_END 97}; 98 99static const struct mii_phydesc rlphys[] = { 100 MII_PHY_DESC(REALTEK, RTL8201L), 101 MII_PHY_DESC(ICPLUS, IP101), 102 MII_PHY_END 103}; 104 105static int 106rlphy_probe(device_t dev) 107{ 108 const char *nic; 109 int rv; 110 111 rv = mii_phy_dev_probe(dev, rlphys, BUS_PROBE_DEFAULT); 112 if (rv <= 0) 113 return (rv); 114 115 nic = device_get_name(device_get_parent(device_get_parent(dev))); 116 if (strcmp(nic, "rl") == 0 || strcmp(nic, "re") == 0) 117 return (mii_phy_dev_probe(dev, rlintphys, BUS_PROBE_DEFAULT)); 118 return (ENXIO); 119} 120 121static int 122rlphy_attach(device_t dev) 123{ 124 struct mii_softc *sc; 125 struct mii_attach_args *ma; 126 struct mii_data *mii; 127 struct rlphy_softc *rsc; 128 129 sc = device_get_softc(dev); 130 ma = device_get_ivars(dev); 131 sc->mii_dev = device_get_parent(dev); 132 mii = ma->mii_data; 133 134 /* 135 * Check whether we're the RTL8201L PHY and remember so the status 136 * routine can query the proper register for speed detection. 137 */ 138 rsc = (struct rlphy_softc *)sc; 139 if (mii_phy_dev_probe(dev, rlphys, 0) == 0) 140 rsc->sc_is_RTL8201L++; 141 142 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 143 144 sc->mii_inst = mii->mii_instance++; 145 sc->mii_phy = ma->mii_phyno; 146 sc->mii_service = rlphy_service; 147 sc->mii_pdata = mii; 148 149 /* 150 * The RealTek PHY can never be isolated. 151 */ 152 sc->mii_flags |= MIIF_NOISOLATE; 153 154#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 155 156 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 157 MII_MEDIA_100_TX); 158 159 mii_phy_reset(sc); 160 161 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 162 device_printf(dev, " "); 163 mii_phy_add_media(sc); 164 printf("\n"); 165#undef ADD 166 MIIBUS_MEDIAINIT(sc->mii_dev); 167 return (0); 168} 169 170static int 171rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 172{ 173 174 switch (cmd) { 175 case MII_POLLSTAT: 176 break; 177 178 case MII_MEDIACHG: 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 mii_phy_setmedia(sc); 186 break; 187 188 case MII_TICK: 189 /* 190 * Is the interface even up? 191 */ 192 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 193 return (0); 194 195 /* 196 * The RealTek PHY's autonegotiation doesn't need to be 197 * kicked; it continues in the background. 198 */ 199 break; 200 } 201 202 /* Update the media status. */ 203 rlphy_status(sc); 204 205 /* Callback if something changed. */ 206 mii_phy_update(sc, cmd); 207 return (0); 208} 209 210static void 211rlphy_status(struct mii_softc *phy) 212{ 213 struct rlphy_softc *rsc =(struct rlphy_softc *)phy; 214 struct mii_data *mii = phy->mii_pdata; 215 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 216 int bmsr, bmcr, anlpar; 217 218 mii->mii_media_status = IFM_AVALID; 219 mii->mii_media_active = IFM_ETHER; 220 221 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 222 if (bmsr & BMSR_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 if (bmcr & BMCR_LOOP) 233 mii->mii_media_active |= IFM_LOOP; 234 235 if (bmcr & BMCR_AUTOEN) { 236 /* 237 * NWay autonegotiation takes the highest-order common 238 * bit of the ANAR and ANLPAR (i.e. best media advertised 239 * both by us and our link partner). 240 */ 241 if ((bmsr & BMSR_ACOMP) == 0) { 242 /* Erg, still trying, I guess... */ 243 mii->mii_media_active |= IFM_NONE; 244 return; 245 } 246 247 if ((anlpar = PHY_READ(phy, MII_ANAR) & 248 PHY_READ(phy, MII_ANLPAR))) { 249 if (anlpar & ANLPAR_TX_FD) 250 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 251 else if (anlpar & ANLPAR_T4) 252 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 253 else if (anlpar & ANLPAR_TX) 254 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 255 else if (anlpar & ANLPAR_10_FD) 256 mii->mii_media_active |= IFM_10_T|IFM_FDX; 257 else if (anlpar & ANLPAR_10) 258 mii->mii_media_active |= IFM_10_T|IFM_HDX; 259 else 260 mii->mii_media_active |= IFM_NONE; 261 return; 262 } 263 /* 264 * If the other side doesn't support NWAY, then the 265 * best we can do is determine if we have a 10Mbps or 266 * 100Mbps link. There's no way to know if the link 267 * is full or half duplex, so we default to half duplex 268 * and hope that the user is clever enough to manually 269 * change the media settings if we're wrong. 270 */ 271 272 /* 273 * The RealTek PHY supports non-NWAY link speed 274 * detection, however it does not report the link 275 * detection results via the ANLPAR or BMSR registers. 276 * (What? RealTek doesn't do things the way everyone 277 * else does? I'm just shocked, shocked I tell you.) 278 * To determine the link speed, we have to do one 279 * of two things: 280 * 281 * - If this is a standalone RealTek RTL8201(L) PHY, 282 * we can determine the link speed by testing bit 0 283 * in the magic, vendor-specific register at offset 284 * 0x19. 285 * 286 * - If this is a RealTek MAC with integrated PHY, we 287 * can test the 'SPEED10' bit of the MAC's media status 288 * register. 289 */ 290 if (rsc->sc_is_RTL8201L) { 291 if (PHY_READ(phy, 0x0019) & 0x01) 292 mii->mii_media_active |= IFM_100_TX; 293 else 294 mii->mii_media_active |= IFM_10_T; 295 } else { 296 if (PHY_READ(phy, RL_MEDIASTAT) & 297 RL_MEDIASTAT_SPEED10) 298 mii->mii_media_active |= IFM_10_T; 299 else 300 mii->mii_media_active |= IFM_100_TX; 301 } 302 mii->mii_media_active |= IFM_HDX; 303 } else 304 mii->mii_media_active = ife->ifm_media; 305} 306