mii.c revision 1.6
1 /* $NetBSD: mii.c,v 1.6 1998/08/10 23:55:16 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 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 THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * MII bus layer, glues MII-capable network interface drivers to sharable 42 * PHY drivers. This exports an interface compatible with BSD/OS 3.0's, 43 * plus some NetBSD extensions. 44 */ 45 46 #include <sys/param.h> 47 #include <sys/device.h> 48 #include <sys/systm.h> 49 #include <sys/socket.h> 50 51 #include <net/if.h> 52 #include <net/if_media.h> 53 54 #include <dev/mii/mii.h> 55 #include <dev/mii/miivar.h> 56 57 int mii_print __P((void *, const char *)); 58 int mii_submatch __P((struct device *, struct cfdata *, void *)); 59 60 /* 61 * Helper function used by network interface drivers, attaches PHYs 62 * to the network interface driver parent. 63 */ 64 void 65 mii_phy_probe(parent, mii, capmask) 66 struct device *parent; 67 struct mii_data *mii; 68 int capmask; 69 { 70 struct mii_attach_args ma; 71 struct mii_softc *child; 72 73 LIST_INIT(&mii->mii_phys); 74 75 for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) { 76 /* 77 * Check to see if there is a PHY at this address. If 78 * the register contains garbage, assume no. 79 */ 80 ma.mii_id1 = (*mii->mii_readreg)(parent, ma.mii_phyno, 81 MII_PHYIDR1); 82 ma.mii_id2 = (*mii->mii_readreg)(parent, ma.mii_phyno, 83 MII_PHYIDR2); 84 if (ma.mii_id1 == 0 || ma.mii_id1 == 0xffff || 85 ma.mii_id2 == 0 || ma.mii_id2 == 0xffff) 86 continue; 87 88 ma.mii_data = mii; 89 ma.mii_capmask = capmask; 90 91 if ((child = (struct mii_softc *)config_found_sm(parent, &ma, 92 mii_print, mii_submatch)) != NULL) { 93 /* 94 * Link it up in the parent's MII data. 95 */ 96 LIST_INSERT_HEAD(&mii->mii_phys, child, mii_list); 97 mii->mii_instance++; 98 } 99 } 100 } 101 102 int 103 mii_print(aux, pnp) 104 void *aux; 105 const char *pnp; 106 { 107 struct mii_attach_args *ma = aux; 108 109 if (pnp != NULL) 110 printf("PHY oui 0x%x model 0x%x rev 0x%x at %s", 111 MII_OUI(ma->mii_id1, ma->mii_id2), MII_MODEL(ma->mii_id2), 112 MII_REV(ma->mii_id2), pnp); 113 114 printf(" phy %d", ma->mii_phyno); 115 return (UNCONF); 116 } 117 118 int 119 mii_submatch(parent, cf, aux) 120 struct device *parent; 121 struct cfdata *cf; 122 void *aux; 123 { 124 struct mii_attach_args *ma = aux; 125 126 if (ma->mii_phyno != cf->cf_loc[MIIBUSCF_PHY] && 127 cf->cf_loc[MIIBUSCF_PHY] != MIIBUSCF_PHY_DEFAULT) 128 return (0); 129 130 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 131 } 132 133 /* 134 * Given an ifmedia word, return the corresponding ANAR value. 135 */ 136 int 137 mii_anar(media) 138 int media; 139 { 140 int rv; 141 142 switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) { 143 case IFM_ETHER|IFM_10_T: 144 rv = ANAR_10|ANAR_CSMA; 145 break; 146 case IFM_ETHER|IFM_10_T|IFM_FDX: 147 rv = ANAR_10_FD|ANAR_CSMA; 148 break; 149 case IFM_ETHER|IFM_100_TX: 150 rv = ANAR_TX|ANAR_CSMA; 151 break; 152 case IFM_ETHER|IFM_100_TX|IFM_FDX: 153 rv = ANAR_TX_FD|ANAR_CSMA; 154 break; 155 case IFM_ETHER|IFM_100_T4: 156 rv = ANAR_T4|ANAR_CSMA; 157 break; 158 default: 159 rv = 0; 160 break; 161 } 162 163 return (rv); 164 } 165 166 /* 167 * Media changed; notify all PHYs. 168 */ 169 int 170 mii_mediachg(mii) 171 struct mii_data *mii; 172 { 173 struct mii_softc *child; 174 int rv; 175 176 mii->mii_media_status = 0; 177 mii->mii_media_active = IFM_NONE; 178 179 for (child = LIST_FIRST(&mii->mii_phys); child != NULL; 180 child = LIST_NEXT(child, mii_list)) { 181 rv = (*child->mii_service)(child, mii, MII_MEDIACHG); 182 if (rv) 183 return (rv); 184 } 185 return (0); 186 } 187 188 /* 189 * Call the PHY tick routines, used during autonegotiation. 190 */ 191 void 192 mii_tick(mii) 193 struct mii_data *mii; 194 { 195 struct mii_softc *child; 196 197 for (child = LIST_FIRST(&mii->mii_phys); child != NULL; 198 child = LIST_NEXT(child, mii_list)) 199 (void) (*child->mii_service)(child, mii, MII_TICK); 200 } 201 202 /* 203 * Get media status from PHYs. 204 */ 205 void 206 mii_pollstat(mii) 207 struct mii_data *mii; 208 { 209 struct mii_softc *child; 210 211 mii->mii_media_status = 0; 212 mii->mii_media_active = IFM_NONE; 213 214 for (child = LIST_FIRST(&mii->mii_phys); child != NULL; 215 child = LIST_NEXT(child, mii_list)) 216 (void) (*child->mii_service)(child, mii, MII_POLLSTAT); 217 } 218 219 /* 220 * Initialize generic PHY media based on BMSR, called when a PHY is 221 * attached. We expect to be set up to print a comma-separated list 222 * of media names. Does not print a newline. 223 */ 224 void 225 mii_add_media(mii, bmsr, instance) 226 struct mii_data *mii; 227 int bmsr, instance; 228 { 229 const char *sep = ""; 230 231 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 232 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 233 234 if (bmsr & BMSR_10THDX) { 235 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, instance), 0); 236 PRINT("10baseT"); 237 } 238 if (bmsr & BMSR_10TFDX) { 239 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, instance), 240 BMCR_FDX); 241 PRINT("10baseT-FDX"); 242 } 243 if (bmsr & BMSR_100TXHDX) { 244 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, instance), 245 BMCR_S100); 246 PRINT("100baseTX"); 247 } 248 if (bmsr & BMSR_100TXFDX) { 249 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, instance), 250 BMCR_S100|BMCR_FDX); 251 PRINT("100baseTX-FDX"); 252 } 253 if (bmsr & BMSR_100T4) { 254 /* 255 * XXX How do you enable 100baseT4? I assume we set 256 * XXX BMCR_S100 and then assume the PHYs will take 257 * XXX watever action is necessary to switch themselves 258 * XXX into T4 mode. 259 */ 260 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, instance), 261 BMCR_S100); 262 PRINT("100baseT4"); 263 } 264 if (bmsr & BMSR_ANEG) { 265 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, instance), 266 BMCR_AUTOEN); 267 PRINT("auto"); 268 } 269 #undef ADD 270 #undef PRINT 271 } 272
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