nsgphy.c revision 150755
1/*- 2 * Copyright (c) 2001 Wind River Systems 3 * Copyright (c) 2001 4 * Bill Paul <wpaul@bsdi.com>. All rights reserved. 5 * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 10 * NASA Ames Research Center. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by Bill Paul. 23 * 4. Neither the name of the author nor the names of any co-contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 37 * THE POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40#include <sys/cdefs.h> 41__FBSDID("$FreeBSD: head/sys/dev/mii/nsgphy.c 150755 2005-09-30 14:45:10Z imp $"); 42 43/* 44 * Driver for the National Semiconductor DP83891 and DP83861 45 * 10/100/1000 PHYs. 46 * Datasheet available at: http://www.national.com/ds/DP/DP83861.pdf 47 * 48 * The DP83891 is the older NatSemi gigE PHY which isn't being sold 49 * anymore. The DP83861 is its replacement, which is an 'enhanced' 50 * firmware driven component. The major difference between the 51 * two is that the 83891 can't generate interrupts, while the 52 * 83861 can. (I think it wasn't originally designed to do this, but 53 * it can now thanks to firmware updates.) The 83861 also allows 54 * access to its internal RAM via indirect register access. 55 */ 56 57#include <sys/param.h> 58#include <sys/systm.h> 59#include <sys/kernel.h> 60#include <sys/module.h> 61#include <sys/socket.h> 62#include <sys/bus.h> 63 64#include <machine/clock.h> 65 66#include <net/if.h> 67#include <net/if_media.h> 68 69#include <dev/mii/mii.h> 70#include <dev/mii/miivar.h> 71#include "miidevs.h" 72 73#include <dev/mii/nsgphyreg.h> 74 75#include "miibus_if.h" 76 77static int nsgphy_probe(device_t); 78static int nsgphy_attach(device_t); 79 80static device_method_t nsgphy_methods[] = { 81 /* device interface */ 82 DEVMETHOD(device_probe, nsgphy_probe), 83 DEVMETHOD(device_attach, nsgphy_attach), 84 DEVMETHOD(device_detach, mii_phy_detach), 85 DEVMETHOD(device_shutdown, bus_generic_shutdown), 86 { 0, 0 } 87}; 88 89static devclass_t nsgphy_devclass; 90 91static driver_t nsgphy_driver = { 92 "nsgphy", 93 nsgphy_methods, 94 sizeof(struct mii_softc) 95}; 96 97 98DRIVER_MODULE(nsgphy, miibus, nsgphy_driver, nsgphy_devclass, 0, 0); 99 100static int nsgphy_service(struct mii_softc *, struct mii_data *,int); 101static void nsgphy_status(struct mii_softc *); 102 103const struct mii_phydesc gphyters[] = { 104 MII_PHY_DESC(NATSEMI, DP83861), 105 MII_PHY_DESC(NATSEMI, DP83891), 106 MII_PHY_END 107}; 108 109static int 110nsgphy_probe(device_t dev) 111{ 112 struct mii_attach_args *ma; 113 const struct mii_phydesc *mpd; 114 115 ma = device_get_ivars(dev); 116 mpd = mii_phy_match(ma, gphyters); 117 if (mpd != NULL) { 118 device_set_desc(dev, mpd->mpd_name); 119 return(0); 120 } 121 122 return(ENXIO); 123} 124 125static int 126nsgphy_attach(device_t dev) 127{ 128 struct mii_softc *sc; 129 struct mii_attach_args *ma; 130 struct mii_data *mii; 131 132 sc = device_get_softc(dev); 133 ma = device_get_ivars(dev); 134 if (bootverbose) 135 device_printf(dev, "<rev. %d>\n", MII_REV(ma->mii_id2)); 136 device_printf(dev, " "); 137 sc->mii_dev = device_get_parent(dev); 138 mii = device_get_softc(sc->mii_dev); 139 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 140 141 sc->mii_inst = mii->mii_instance; 142 sc->mii_phy = ma->mii_phyno; 143 sc->mii_service = nsgphy_service; 144 sc->mii_pdata = mii; 145 sc->mii_anegticks = 5; 146 147 mii->mii_instance++; 148 149 sc->mii_capabilities = (PHY_READ(sc, MII_BMSR) | 150 (BMSR_10TFDX|BMSR_10THDX)) & ma->mii_capmask; 151 if (sc->mii_capabilities & BMSR_EXTSTAT) 152 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR); 153 154 mii_phy_add_media(sc); 155 printf("\n"); 156 157 MIIBUS_MEDIAINIT(sc->mii_dev); 158 return(0); 159} 160 161static int 162nsgphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 163{ 164 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 165 int reg; 166 167 switch (cmd) { 168 case MII_POLLSTAT: 169 /* 170 * If we're not polling our PHY instance, just return. 171 */ 172 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 173 return (0); 174 break; 175 176 case MII_MEDIACHG: 177 /* 178 * If the media indicates a different PHY instance, 179 * isolate ourselves. 180 */ 181 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 182 reg = PHY_READ(sc, MII_BMCR); 183 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 184 return (0); 185 } 186 187 /* 188 * If the interface is not up, don't do anything. 189 */ 190 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 191 break; 192 193 mii_phy_setmedia(sc); 194 break; 195 196 case MII_TICK: 197 /* 198 * If we're not currently selected, just return. 199 */ 200 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 201 return (0); 202 203 if (mii_phy_tick(sc) == EJUSTRETURN) 204 return (0); 205 break; 206 } 207 208 /* Update the media status. */ 209 nsgphy_status(sc); 210 211 /* Callback if something changed. */ 212 mii_phy_update(sc, cmd); 213 return (0); 214} 215 216static void 217nsgphy_status(struct mii_softc *sc) 218{ 219 struct mii_data *mii = sc->mii_pdata; 220 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 221 int bmsr, bmcr, physup, gtsr; 222 223 mii->mii_media_status = IFM_AVALID; 224 mii->mii_media_active = IFM_ETHER; 225 226 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 227 228 physup = PHY_READ(sc, NSGPHY_MII_PHYSUP); 229 230 if (physup & PHY_SUP_LINK) 231 mii->mii_media_status |= IFM_ACTIVE; 232 233 bmcr = PHY_READ(sc, MII_BMCR); 234 if (bmcr & BMCR_ISO) { 235 mii->mii_media_active |= IFM_NONE; 236 mii->mii_media_status = 0; 237 return; 238 } 239 240 if (bmcr & BMCR_LOOP) 241 mii->mii_media_active |= IFM_LOOP; 242 243 if (bmcr & BMCR_AUTOEN) { 244 /* 245 * The media status bits are only valid if autonegotiation 246 * has completed (or it's disabled). 247 */ 248 if ((bmsr & BMSR_ACOMP) == 0) { 249 /* Erg, still trying, I guess... */ 250 mii->mii_media_active |= IFM_NONE; 251 return; 252 } 253 254 switch (physup & (PHY_SUP_SPEED1|PHY_SUP_SPEED0)) { 255 case PHY_SUP_SPEED1: 256 mii->mii_media_active |= IFM_1000_T; 257 gtsr = PHY_READ(sc, MII_100T2SR); 258 if (gtsr & GTSR_MS_RES) 259 mii->mii_media_active |= IFM_ETH_MASTER; 260 break; 261 262 case PHY_SUP_SPEED0: 263 mii->mii_media_active |= IFM_100_TX; 264 break; 265 266 case 0: 267 mii->mii_media_active |= IFM_10_T; 268 break; 269 270 default: 271 mii->mii_media_active |= IFM_NONE; 272 mii->mii_media_status = 0; 273 } 274 if (physup & PHY_SUP_DUPLEX) 275 mii->mii_media_active |= IFM_FDX; 276 } else 277 mii->mii_media_active = ife->ifm_media; 278} 279