nsgphy.c revision 95724
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 * $FreeBSD: head/sys/dev/mii/nsgphy.c 95724 2002-04-29 14:09:10Z phk $ 40 */ 41 42/* 43 * Driver for the National Semiconductor DP83891 and DP83861 44 * 10/100/1000 PHYs. 45 * Datasheet available at: http://www.national.com/ds/DP/DP83861.pdf 46 * 47 * The DP83891 is the older NatSemi gigE PHY which isn't being sold 48 * anymore. The DP83861 is its replacement, which is an 'enhanced' 49 * firmware driven component. The major difference between the 50 * two is that the 83891 can't generate interrupts, while the 51 * 83861 can. (I think it wasn't originally designed to do this, but 52 * it can now thanks to firmware updates.) The 83861 also allows 53 * access to its internal RAM via indirect register access. 54 */ 55 56#include <sys/param.h> 57#include <sys/systm.h> 58#include <sys/kernel.h> 59#include <sys/malloc.h> 60#include <sys/socket.h> 61#include <sys/bus.h> 62 63#include <machine/clock.h> 64 65#include <net/if.h> 66#include <net/if_media.h> 67 68#include <dev/mii/mii.h> 69#include <dev/mii/miivar.h> 70#include <dev/mii/miidevs.h> 71 72#include <dev/mii/nsgphyreg.h> 73 74#include "miibus_if.h" 75 76#if !defined(lint) 77static const char rcsid[] = 78 "$FreeBSD: head/sys/dev/mii/nsgphy.c 95724 2002-04-29 14:09:10Z phk $"; 79#endif 80 81static int nsgphy_probe (device_t); 82static int nsgphy_attach (device_t); 83 84static device_method_t nsgphy_methods[] = { 85 /* device interface */ 86 DEVMETHOD(device_probe, nsgphy_probe), 87 DEVMETHOD(device_attach, nsgphy_attach), 88 DEVMETHOD(device_detach, mii_phy_detach), 89 DEVMETHOD(device_shutdown, bus_generic_shutdown), 90 { 0, 0 } 91}; 92 93static devclass_t nsgphy_devclass; 94 95static driver_t nsgphy_driver = { 96 "nsgphy", 97 nsgphy_methods, 98 sizeof(struct mii_softc) 99}; 100 101 102DRIVER_MODULE(nsgphy, miibus, nsgphy_driver, nsgphy_devclass, 0, 0); 103 104static int nsgphy_service(struct mii_softc *, struct mii_data *,int); 105static void nsgphy_status(struct mii_softc *); 106extern void mii_phy_auto_timeout(void *); 107 108const struct mii_phydesc gphyters[] = { 109 { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83861, 110 MII_STR_NATSEMI_DP83861 }, 111 112 { MII_OUI_NATSEMI, MII_MODEL_NATSEMI_DP83891, 113 MII_STR_NATSEMI_DP83891 }, 114 115 { 0, 0, 116 NULL }, 117}; 118 119static int 120nsgphy_probe(device_t dev) 121{ 122 struct mii_attach_args *ma; 123 const struct mii_phydesc *mpd; 124 125 ma = device_get_ivars(dev); 126 mpd = mii_phy_match(ma, gphyters); 127 if (mpd != NULL) { 128 device_set_desc(dev, mpd->mpd_name); 129 return(0); 130 } 131 132 return(ENXIO); 133} 134 135static int 136nsgphy_attach(device_t dev) 137{ 138 struct mii_softc *sc; 139 struct mii_attach_args *ma; 140 struct mii_data *mii; 141 const struct mii_phydesc *mpd; 142 143 sc = device_get_softc(dev); 144 ma = device_get_ivars(dev); 145 mpd = mii_phy_match(ma, gphyters); 146 if (bootverbose) 147 device_printf(dev, "<rev. %d>\n", MII_REV(ma->mii_id2)); 148 device_printf(dev, " "); 149 sc->mii_dev = device_get_parent(dev); 150 mii = device_get_softc(sc->mii_dev); 151 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 152 153 sc->mii_inst = mii->mii_instance; 154 sc->mii_phy = ma->mii_phyno; 155 sc->mii_service = nsgphy_service; 156 sc->mii_pdata = mii; 157 sc->mii_anegticks = 5; 158 159 mii->mii_instance++; 160 161 sc->mii_capabilities = (PHY_READ(sc, MII_BMSR) | 162 (BMSR_10TFDX|BMSR_10THDX)) & ma->mii_capmask; 163 if (sc->mii_capabilities & BMSR_EXTSTAT) 164 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR); 165 166 mii_phy_add_media(sc); 167 printf("\n"); 168 169 MIIBUS_MEDIAINIT(sc->mii_dev); 170 return(0); 171} 172 173static int 174nsgphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 175{ 176 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 177 int reg; 178 179 switch (cmd) { 180 case MII_POLLSTAT: 181 /* 182 * If we're not polling our PHY instance, just return. 183 */ 184 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 185 return (0); 186 break; 187 188 case MII_MEDIACHG: 189 /* 190 * If the media indicates a different PHY instance, 191 * isolate ourselves. 192 */ 193 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 194 reg = PHY_READ(sc, MII_BMCR); 195 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 196 return (0); 197 } 198 199 /* 200 * If the interface is not up, don't do anything. 201 */ 202 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 203 break; 204 205 mii_phy_setmedia(sc); 206 break; 207 208 case MII_TICK: 209 /* 210 * If we're not currently selected, just return. 211 */ 212 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 213 return (0); 214 215 if (mii_phy_tick(sc) == EJUSTRETURN) 216 return (0); 217 break; 218 } 219 220 /* Update the media status. */ 221 nsgphy_status(sc); 222 223 /* Callback if something changed. */ 224 mii_phy_update(sc, cmd); 225 return (0); 226} 227 228static void 229nsgphy_status(struct mii_softc *sc) 230{ 231 struct mii_data *mii = sc->mii_pdata; 232 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 233 int bmsr, bmcr, physup, gtsr; 234 235 mii->mii_media_status = IFM_AVALID; 236 mii->mii_media_active = IFM_ETHER; 237 238 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 239 240 physup = PHY_READ(sc, NSGPHY_MII_PHYSUP); 241 242 if (physup & PHY_SUP_LINK) 243 mii->mii_media_status |= IFM_ACTIVE; 244 245 bmcr = PHY_READ(sc, MII_BMCR); 246 if (bmcr & BMCR_ISO) { 247 mii->mii_media_active |= IFM_NONE; 248 mii->mii_media_status = 0; 249 return; 250 } 251 252 if (bmcr & BMCR_LOOP) 253 mii->mii_media_active |= IFM_LOOP; 254 255 if (bmcr & BMCR_AUTOEN) { 256 /* 257 * The media status bits are only valid if autonegotiation 258 * has completed (or it's disabled). 259 */ 260 if ((bmsr & BMSR_ACOMP) == 0) { 261 /* Erg, still trying, I guess... */ 262 mii->mii_media_active |= IFM_NONE; 263 return; 264 } 265 266 switch (physup & (PHY_SUP_SPEED1|PHY_SUP_SPEED0)) { 267 case PHY_SUP_SPEED1: 268 mii->mii_media_active |= IFM_1000_T; 269 gtsr = PHY_READ(sc, MII_100T2SR); 270 if (gtsr & GTSR_MS_RES) 271 mii->mii_media_active |= IFM_ETH_MASTER; 272 break; 273 274 case PHY_SUP_SPEED0: 275 mii->mii_media_active |= IFM_100_TX; 276 break; 277 278 case 0: 279 mii->mii_media_active |= IFM_10_T; 280 break; 281 282 default: 283 mii->mii_media_active |= IFM_NONE; 284 mii->mii_media_status = 0; 285 } 286 if (physup & PHY_SUP_DUPLEX) 287 mii->mii_media_active |= IFM_FDX; 288 } else 289 mii->mii_media_active = ife->ifm_media; 290} 291