rlphy.c revision 164711
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 164711 2006-11-28 01:14:09Z 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 60static int rlphy_probe(device_t); 61static int rlphy_attach(device_t); 62 63static device_method_t rlphy_methods[] = { 64 /* device interface */ 65 DEVMETHOD(device_probe, rlphy_probe), 66 DEVMETHOD(device_attach, rlphy_attach), 67 DEVMETHOD(device_detach, mii_phy_detach), 68 DEVMETHOD(device_shutdown, bus_generic_shutdown), 69 { 0, 0 } 70}; 71 72static devclass_t rlphy_devclass; 73 74static driver_t rlphy_driver = { 75 "rlphy", 76 rlphy_methods, 77 sizeof(struct mii_softc) 78}; 79 80DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0); 81 82static int rlphy_service(struct mii_softc *, struct mii_data *, int); 83static void rlphy_status(struct mii_softc *); 84 85static int 86rlphy_probe(device_t dev) 87{ 88 struct mii_attach_args *ma; 89 device_t parent; 90 91 ma = device_get_ivars(dev); 92 parent = device_get_parent(device_get_parent(dev)); 93 94 /* Test for RealTek 8201L PHY */ 95 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_REALTEK && 96 MII_MODEL(ma->mii_id2) == MII_MODEL_REALTEK_RTL8201L) { 97 device_set_desc(dev, MII_STR_REALTEK_RTL8201L); 98 return (BUS_PROBE_DEFAULT); 99 } 100 101 /* 102 * RealTek PHY doesn't have vendor/device ID registers: 103 * the rl driver fakes up a return value of all zeros. 104 */ 105 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 || 106 MII_MODEL(ma->mii_id2) != 0) 107 return (ENXIO); 108 109 /* 110 * Make sure the parent is an `rl' or an `re'. 111 */ 112 if (strcmp(device_get_name(parent), "rl") != 0 && 113 strcmp(device_get_name(parent), "re") != 0) 114 return (ENXIO); 115 116 device_set_desc(dev, "RealTek internal media interface"); 117 118 return (BUS_PROBE_DEFAULT); 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; 127 128 sc = device_get_softc(dev); 129 ma = device_get_ivars(dev); 130 sc->mii_dev = device_get_parent(dev); 131 mii = device_get_softc(sc->mii_dev); 132 133 /* 134 * The RealTek PHY can never be isolated, so never allow non-zero 135 * instances! 136 */ 137 if (mii->mii_instance != 0) { 138 device_printf(dev, "ignoring this PHY, non-zero instance\n"); 139 return (ENXIO); 140 } 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 mii->mii_instance++; 149 150 sc->mii_flags |= MIIF_NOISOLATE; 151 152#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 153 154 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 155 BMCR_LOOP|BMCR_S100); 156 157 mii_phy_reset(sc); 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#undef ADD 165 MIIBUS_MEDIAINIT(sc->mii_dev); 166 return (0); 167} 168 169static int 170rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 171{ 172 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 173 174 /* 175 * We can't isolate the RealTek PHY, so it has to be the only one! 176 */ 177 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 178 panic("rlphy_service: can't isolate RealTek PHY"); 179 180 switch (cmd) { 181 case MII_POLLSTAT: 182 break; 183 184 case MII_MEDIACHG: 185 /* 186 * If the interface is not up, don't do anything. 187 */ 188 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 189 break; 190 191 mii_phy_setmedia(sc); 192 break; 193 194 case MII_TICK: 195 /* 196 * Is the interface even up? 197 */ 198 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 199 return (0); 200 201 /* 202 * The RealTek PHY's autonegotiation doesn't need to be 203 * kicked; it continues in the background. 204 */ 205 break; 206 } 207 208 /* Update the media status. */ 209 rlphy_status(sc); 210 211 /* Callback if something changed. */ 212 mii_phy_update(sc, cmd); 213 return (0); 214} 215 216static void 217rlphy_status(struct mii_softc *phy) 218{ 219 struct mii_data *mii = phy->mii_pdata; 220 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 221 int bmsr, bmcr, anlpar; 222 223 mii->mii_media_status = IFM_AVALID; 224 mii->mii_media_active = IFM_ETHER; 225 226 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 227 if (bmsr & BMSR_LINK) 228 mii->mii_media_status |= IFM_ACTIVE; 229 230 bmcr = PHY_READ(phy, MII_BMCR); 231 if (bmcr & BMCR_ISO) { 232 mii->mii_media_active |= IFM_NONE; 233 mii->mii_media_status = 0; 234 return; 235 } 236 237 if (bmcr & BMCR_LOOP) 238 mii->mii_media_active |= IFM_LOOP; 239 240 if (bmcr & BMCR_AUTOEN) { 241 /* 242 * NWay autonegotiation takes the highest-order common 243 * bit of the ANAR and ANLPAR (i.e. best media advertised 244 * both by us and our link partner). 245 */ 246 if ((bmsr & BMSR_ACOMP) == 0) { 247 /* Erg, still trying, I guess... */ 248 mii->mii_media_active |= IFM_NONE; 249 return; 250 } 251 252 if ((anlpar = PHY_READ(phy, MII_ANAR) & 253 PHY_READ(phy, MII_ANLPAR))) { 254 if (anlpar & ANLPAR_T4) 255 mii->mii_media_active |= IFM_100_T4; 256 else if (anlpar & ANLPAR_TX_FD) 257 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 258 else if (anlpar & ANLPAR_TX) 259 mii->mii_media_active |= IFM_100_TX; 260 else if (anlpar & ANLPAR_10_FD) 261 mii->mii_media_active |= IFM_10_T|IFM_FDX; 262 else if (anlpar & ANLPAR_10) 263 mii->mii_media_active |= IFM_10_T; 264 else 265 mii->mii_media_active |= IFM_NONE; 266 return; 267 } 268 /* 269 * If the other side doesn't support NWAY, then the 270 * best we can do is determine if we have a 10Mbps or 271 * 100Mbps link. There's no way to know if the link 272 * is full or half duplex, so we default to half duplex 273 * and hope that the user is clever enough to manually 274 * change the media settings if we're wrong. 275 */ 276 277 /* 278 * The RealTek PHY supports non-NWAY link speed 279 * detection, however it does not report the link 280 * detection results via the ANLPAR or BMSR registers. 281 * (What? RealTek doesn't do things the way everyone 282 * else does? I'm just shocked, shocked I tell you.) 283 * To determine the link speed, we have to do one 284 * of two things: 285 * 286 * - If this is a standalone RealTek RTL8201(L) PHY, 287 * we can determine the link speed by testing bit 0 288 * in the magic, vendor-specific register at offset 289 * 0x19. 290 * 291 * - If this is a RealTek MAC with integrated PHY, we 292 * can test the 'SPEED10' bit of the MAC's media status 293 * register. 294 */ 295 if (strcmp(mii->mii_ifp->if_dname, "rl") != 0) { 296 if (PHY_READ(phy, 0x0019) & 0x01) 297 mii->mii_media_active |= IFM_100_TX; 298 else 299 mii->mii_media_active |= IFM_10_T; 300 } else { 301 if (PHY_READ(phy, RL_MEDIASTAT) & 302 RL_MEDIASTAT_SPEED10) 303 mii->mii_media_active |= IFM_10_T; 304 else 305 mii->mii_media_active |= IFM_100_TX; 306 } 307 } else 308 mii->mii_media_active = ife->ifm_media; 309} 310