rlphy.c revision 292780
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: stable/10/sys/dev/mii/rlphy.c 292780 2015-12-27 17:12:54Z 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 <dev/rl/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 DEVMETHOD_END 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 85/* 86 * RealTek internal PHYs don't have vendor/device ID registers; 87 * re(4) and rl(4) fake up a return value of all zeros. 88 */ 89static const struct mii_phydesc rlintphys[] = { 90 { 0, 0, "RealTek internal media interface" }, 91 MII_PHY_END 92}; 93 94static const struct mii_phydesc rlphys[] = { 95 MII_PHY_DESC(yyREALTEK, RTL8201L), 96 MII_PHY_DESC(REALTEK, RTL8201E), 97 MII_PHY_DESC(xxICPLUS, IP101), 98 MII_PHY_END 99}; 100 101static const struct mii_phy_funcs rlphy_funcs = { 102 rlphy_service, 103 rlphy_status, 104 mii_phy_reset 105}; 106 107static int 108rlphy_probe(device_t dev) 109{ 110 const char *nic; 111 int rv; 112 113 rv = mii_phy_dev_probe(dev, rlphys, BUS_PROBE_DEFAULT); 114 if (rv <= 0) 115 return (rv); 116 117 nic = device_get_name(device_get_parent(device_get_parent(dev))); 118 if (strcmp(nic, "rl") == 0 || strcmp(nic, "re") == 0) 119 return (mii_phy_dev_probe(dev, rlintphys, BUS_PROBE_DEFAULT)); 120 return (ENXIO); 121} 122 123static int 124rlphy_attach(device_t dev) 125{ 126 127 /* 128 * The RealTek PHY can never be isolated. 129 */ 130 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, 131 &rlphy_funcs, 1); 132 return (0); 133} 134 135static int 136rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 137{ 138 139 switch (cmd) { 140 case MII_POLLSTAT: 141 break; 142 143 case MII_MEDIACHG: 144 /* 145 * If the interface is not up, don't do anything. 146 */ 147 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 148 break; 149 150 mii_phy_setmedia(sc); 151 break; 152 153 case MII_TICK: 154 /* 155 * Is the interface even up? 156 */ 157 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 158 return (0); 159 160 /* 161 * The RealTek PHY's autonegotiation doesn't need to be 162 * kicked; it continues in the background. 163 */ 164 break; 165 } 166 167 /* Update the media status. */ 168 PHY_STATUS(sc); 169 170 /* Callback if something changed. */ 171 mii_phy_update(sc, cmd); 172 return (0); 173} 174 175static void 176rlphy_status(struct mii_softc *phy) 177{ 178 struct mii_data *mii = phy->mii_pdata; 179 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 180 int bmsr, bmcr, anlpar; 181 182 mii->mii_media_status = IFM_AVALID; 183 mii->mii_media_active = IFM_ETHER; 184 185 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 186 if (bmsr & BMSR_LINK) 187 mii->mii_media_status |= IFM_ACTIVE; 188 189 bmcr = PHY_READ(phy, MII_BMCR); 190 if (bmcr & BMCR_ISO) { 191 mii->mii_media_active |= IFM_NONE; 192 mii->mii_media_status = 0; 193 return; 194 } 195 196 if (bmcr & BMCR_LOOP) 197 mii->mii_media_active |= IFM_LOOP; 198 199 if (bmcr & BMCR_AUTOEN) { 200 /* 201 * NWay autonegotiation takes the highest-order common 202 * bit of the ANAR and ANLPAR (i.e. best media advertised 203 * both by us and our link partner). 204 */ 205 if ((bmsr & BMSR_ACOMP) == 0) { 206 /* Erg, still trying, I guess... */ 207 mii->mii_media_active |= IFM_NONE; 208 return; 209 } 210 211 if ((anlpar = PHY_READ(phy, MII_ANAR) & 212 PHY_READ(phy, MII_ANLPAR))) { 213 if (anlpar & ANLPAR_TX_FD) 214 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 215 else if (anlpar & ANLPAR_T4) 216 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 217 else if (anlpar & ANLPAR_TX) 218 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 219 else if (anlpar & ANLPAR_10_FD) 220 mii->mii_media_active |= IFM_10_T|IFM_FDX; 221 else if (anlpar & ANLPAR_10) 222 mii->mii_media_active |= IFM_10_T|IFM_HDX; 223 else 224 mii->mii_media_active |= IFM_NONE; 225 if ((mii->mii_media_active & IFM_FDX) != 0) 226 mii->mii_media_active |= 227 mii_phy_flowstatus(phy); 228 return; 229 } 230 /* 231 * If the other side doesn't support NWAY, then the 232 * best we can do is determine if we have a 10Mbps or 233 * 100Mbps link. There's no way to know if the link 234 * is full or half duplex, so we default to half duplex 235 * and hope that the user is clever enough to manually 236 * change the media settings if we're wrong. 237 */ 238 239 /* 240 * The RealTek PHY supports non-NWAY link speed 241 * detection, however it does not report the link 242 * detection results via the ANLPAR or BMSR registers. 243 * (What? RealTek doesn't do things the way everyone 244 * else does? I'm just shocked, shocked I tell you.) 245 * To determine the link speed, we have to do one 246 * of two things: 247 * 248 * - If this is a standalone RealTek RTL8201(L) or 249 * workalike PHY, we can determine the link speed by 250 * testing bit 0 in the magic, vendor-specific register 251 * at offset 0x19. 252 * 253 * - If this is a RealTek MAC with integrated PHY, we 254 * can test the 'SPEED10' bit of the MAC's media status 255 * register. 256 */ 257 if (!(phy->mii_mpd_model == 0 && phy->mii_mpd_rev == 0)) { 258 if (PHY_READ(phy, 0x0019) & 0x01) 259 mii->mii_media_active |= IFM_100_TX; 260 else 261 mii->mii_media_active |= IFM_10_T; 262 } else { 263 if (PHY_READ(phy, RL_MEDIASTAT) & 264 RL_MEDIASTAT_SPEED10) 265 mii->mii_media_active |= IFM_10_T; 266 else 267 mii->mii_media_active |= IFM_100_TX; 268 } 269 mii->mii_media_active |= IFM_HDX; 270 } else 271 mii->mii_media_active = ife->ifm_media; 272} 273