nsgphy.c revision 139749
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 139749 2005-01-06 01:43:34Z 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_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83861, 105 MII_STR_NATSEMI_DP83861 }, 106 107 { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83891, 108 MII_STR_NATSEMI_DP83891 }, 109 110 { 0, 0, 111 NULL }, 112}; 113 114static int 115nsgphy_probe(device_t dev) 116{ 117 struct mii_attach_args *ma; 118 const struct mii_phydesc *mpd; 119 120 ma = device_get_ivars(dev); 121 mpd = mii_phy_match(ma, gphyters); 122 if (mpd != NULL) { 123 device_set_desc(dev, mpd->mpd_name); 124 return(0); 125 } 126 127 return(ENXIO); 128} 129 130static int 131nsgphy_attach(device_t dev) 132{ 133 struct mii_softc *sc; 134 struct mii_attach_args *ma; 135 struct mii_data *mii; 136 137 sc = device_get_softc(dev); 138 ma = device_get_ivars(dev); 139 if (bootverbose) 140 device_printf(dev, "<rev. %d>\n", MII_REV(ma->mii_id2)); 141 device_printf(dev, " "); 142 sc->mii_dev = device_get_parent(dev); 143 mii = device_get_softc(sc->mii_dev); 144 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 145 146 sc->mii_inst = mii->mii_instance; 147 sc->mii_phy = ma->mii_phyno; 148 sc->mii_service = nsgphy_service; 149 sc->mii_pdata = mii; 150 sc->mii_anegticks = 5; 151 152 mii->mii_instance++; 153 154 sc->mii_capabilities = (PHY_READ(sc, MII_BMSR) | 155 (BMSR_10TFDX|BMSR_10THDX)) & ma->mii_capmask; 156 if (sc->mii_capabilities & BMSR_EXTSTAT) 157 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR); 158 159 mii_phy_add_media(sc); 160 printf("\n"); 161 162 MIIBUS_MEDIAINIT(sc->mii_dev); 163 return(0); 164} 165 166static int 167nsgphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 168{ 169 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 170 int reg; 171 172 switch (cmd) { 173 case MII_POLLSTAT: 174 /* 175 * If we're not polling our PHY instance, just return. 176 */ 177 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 178 return (0); 179 break; 180 181 case MII_MEDIACHG: 182 /* 183 * If the media indicates a different PHY instance, 184 * isolate ourselves. 185 */ 186 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 187 reg = PHY_READ(sc, MII_BMCR); 188 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 189 return (0); 190 } 191 192 /* 193 * If the interface is not up, don't do anything. 194 */ 195 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 196 break; 197 198 mii_phy_setmedia(sc); 199 break; 200 201 case MII_TICK: 202 /* 203 * If we're not currently selected, just return. 204 */ 205 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 206 return (0); 207 208 if (mii_phy_tick(sc) == EJUSTRETURN) 209 return (0); 210 break; 211 } 212 213 /* Update the media status. */ 214 nsgphy_status(sc); 215 216 /* Callback if something changed. */ 217 mii_phy_update(sc, cmd); 218 return (0); 219} 220 221static void 222nsgphy_status(struct mii_softc *sc) 223{ 224 struct mii_data *mii = sc->mii_pdata; 225 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 226 int bmsr, bmcr, physup, gtsr; 227 228 mii->mii_media_status = IFM_AVALID; 229 mii->mii_media_active = IFM_ETHER; 230 231 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 232 233 physup = PHY_READ(sc, NSGPHY_MII_PHYSUP); 234 235 if (physup & PHY_SUP_LINK) 236 mii->mii_media_status |= IFM_ACTIVE; 237 238 bmcr = PHY_READ(sc, MII_BMCR); 239 if (bmcr & BMCR_ISO) { 240 mii->mii_media_active |= IFM_NONE; 241 mii->mii_media_status = 0; 242 return; 243 } 244 245 if (bmcr & BMCR_LOOP) 246 mii->mii_media_active |= IFM_LOOP; 247 248 if (bmcr & BMCR_AUTOEN) { 249 /* 250 * The media status bits are only valid if autonegotiation 251 * has completed (or it's disabled). 252 */ 253 if ((bmsr & BMSR_ACOMP) == 0) { 254 /* Erg, still trying, I guess... */ 255 mii->mii_media_active |= IFM_NONE; 256 return; 257 } 258 259 switch (physup & (PHY_SUP_SPEED1|PHY_SUP_SPEED0)) { 260 case PHY_SUP_SPEED1: 261 mii->mii_media_active |= IFM_1000_T; 262 gtsr = PHY_READ(sc, MII_100T2SR); 263 if (gtsr & GTSR_MS_RES) 264 mii->mii_media_active |= IFM_ETH_MASTER; 265 break; 266 267 case PHY_SUP_SPEED0: 268 mii->mii_media_active |= IFM_100_TX; 269 break; 270 271 case 0: 272 mii->mii_media_active |= IFM_10_T; 273 break; 274 275 default: 276 mii->mii_media_active |= IFM_NONE; 277 mii->mii_media_status = 0; 278 } 279 if (physup & PHY_SUP_DUPLEX) 280 mii->mii_media_active |= IFM_FDX; 281 } else 282 mii->mii_media_active = ife->ifm_media; 283} 284