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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 | /* drivers/net/tulip/pnic2.c Copyright 2000,2001 The Linux Kernel Team Written/copyright 1994-2001 by Donald Becker. Modified to hep support PNIC_II by Kevin B. Hendricks This software may be used and distributed according to the terms of the GNU General Public License, incorporated herein by reference. Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html} for more information on this driver. Please submit bugs to http://bugzilla.kernel.org/ . */ /* Understanding the PNIC_II - everything is this file is based * on the PNIC_II_PDF datasheet which is sorely lacking in detail * * As I understand things, here are the registers and bits that * explain the masks and constants used in this file that are * either different from the 21142/3 or important for basic operation. * * * CSR 6 (mask = 0xfe3bd1fd of bits not to change) * ----- * Bit 24 - SCR * Bit 23 - PCS * Bit 22 - TTM (Trasmit Threshold Mode) * Bit 18 - Port Select * Bit 13 - Start - 1, Stop - 0 Transmissions * Bit 11:10 - Loop Back Operation Mode * Bit 9 - Full Duplex mode (Advertise 10BaseT-FD is CSR14<7> is set) * Bit 1 - Start - 1, Stop - 0 Receive * * * CSR 14 (mask = 0xfff0ee39 of bits not to change) * ------ * Bit 19 - PAUSE-Pause * Bit 18 - Advertise T4 * Bit 17 - Advertise 100baseTx-FD * Bit 16 - Advertise 100baseTx-HD * Bit 12 - LTE - Link Test Enable * Bit 7 - ANE - Auto Negotiate Enable * Bit 6 - HDE - Advertise 10baseT-HD * Bit 2 - Reset to Power down - kept as 1 for normal operation * Bit 1 - Loop Back enable for 10baseT MCC * * * CSR 12 * ------ * Bit 25 - Partner can do T4 * Bit 24 - Partner can do 100baseTx-FD * Bit 23 - Partner can do 100baseTx-HD * Bit 22 - Partner can do 10baseT-FD * Bit 21 - Partner can do 10baseT-HD * Bit 15 - LPN is 1 if all above bits are valid other wise 0 * Bit 14:12 - autonegotiation state (write 001 to start autonegotiate) * Bit 3 - Autopolarity state * Bit 2 - LS10B - link state of 10baseT 0 - good, 1 - failed * Bit 1 - LS100B - link state of 100baseT 0 - good, 1- faild * * * Data Port Selection Info *------------------------- * * CSR14<7> CSR6<18> CSR6<22> CSR6<23> CSR6<24> MODE/PORT * 1 0 0 (X) 0 (X) 1 NWAY * 0 0 1 0 (X) 0 10baseT * 0 1 0 1 1 (X) 100baseT * * */ #include "tulip.h" #include <linux/delay.h> void pnic2_timer(unsigned long data) { struct net_device *dev = (struct net_device *)data; struct tulip_private *tp = netdev_priv(dev); void __iomem *ioaddr = tp->base_addr; int next_tick = 60*HZ; if (tulip_debug > 3) printk(KERN_INFO"%s: PNIC2 negotiation status %8.8x.\n", dev->name,ioread32(ioaddr + CSR12)); if (next_tick) { mod_timer(&tp->timer, RUN_AT(next_tick)); } } void pnic2_start_nway(struct net_device *dev) { struct tulip_private *tp = netdev_priv(dev); void __iomem *ioaddr = tp->base_addr; int csr14; int csr12; /* set up what to advertise during the negotiation */ /* load in csr14 and mask off bits not to touch * comment at top of file explains mask value */ csr14 = (ioread32(ioaddr + CSR14) & 0xfff0ee39); /* bit 17 - advetise 100baseTx-FD */ if (tp->sym_advertise & 0x0100) csr14 |= 0x00020000; /* bit 16 - advertise 100baseTx-HD */ if (tp->sym_advertise & 0x0080) csr14 |= 0x00010000; /* bit 6 - advertise 10baseT-HD */ if (tp->sym_advertise & 0x0020) csr14 |= 0x00000040; /* Now set bit 12 Link Test Enable, Bit 7 Autonegotiation Enable * and bit 0 Don't PowerDown 10baseT */ csr14 |= 0x00001184; if (tulip_debug > 1) printk(KERN_DEBUG "%s: Restarting PNIC2 autonegotiation, " "csr14=%8.8x.\n", dev->name, csr14); /* tell pnic2_lnk_change we are doing an nway negotiation */ dev->if_port = 0; tp->nway = tp->mediasense = 1; tp->nwayset = tp->lpar = 0; /* now we have to set up csr6 for NWAY state */ tp->csr6 = ioread32(ioaddr + CSR6); if (tulip_debug > 1) printk(KERN_DEBUG "%s: On Entry to Nway, " "csr6=%8.8x.\n", dev->name, tp->csr6); /* mask off any bits not to touch * comment at top of file explains mask value */ tp->csr6 = tp->csr6 & 0xfe3bd1fd; /* don't forget that bit 9 is also used for advertising */ /* advertise 10baseT-FD for the negotiation (bit 9) */ if (tp->sym_advertise & 0x0040) tp->csr6 |= 0x00000200; /* set bit 24 for nway negotiation mode ... * see Data Port Selection comment at top of file * and "Stop" - reset both Transmit (bit 13) and Receive (bit 1) */ tp->csr6 |= 0x01000000; iowrite32(csr14, ioaddr + CSR14); iowrite32(tp->csr6, ioaddr + CSR6); udelay(100); /* all set up so now force the negotiation to begin */ /* read in current values and mask off all but the * Autonegotiation bits 14:12. Writing a 001 to those bits * should start the autonegotiation */ csr12 = (ioread32(ioaddr + CSR12) & 0xffff8fff); csr12 |= 0x1000; iowrite32(csr12, ioaddr + CSR12); } void pnic2_lnk_change(struct net_device *dev, int csr5) { struct tulip_private *tp = netdev_priv(dev); void __iomem *ioaddr = tp->base_addr; int csr14; /* read the staus register to find out what is up */ int csr12 = ioread32(ioaddr + CSR12); if (tulip_debug > 1) printk(KERN_INFO"%s: PNIC2 link status interrupt %8.8x, " " CSR5 %x, %8.8x.\n", dev->name, csr12, csr5, ioread32(ioaddr + CSR14)); /* If NWay finished and we have a negotiated partner capability. * check bits 14:12 for bit pattern 101 - all is good */ if (tp->nway && !tp->nwayset) { /* we did an auto negotiation */ if ((csr12 & 0x7000) == 0x5000) { /* negotiation ended successfully */ /* get the link partners reply and mask out all but * bits 24-21 which show the partners capabilities * and match those to what we advertised * * then begin to interpret the results of the negotiation. * Always go in this order : (we are ignoring T4 for now) * 100baseTx-FD, 100baseTx-HD, 10baseT-FD, 10baseT-HD */ int negotiated = ((csr12 >> 16) & 0x01E0) & tp->sym_advertise; tp->lpar = (csr12 >> 16); tp->nwayset = 1; if (negotiated & 0x0100) dev->if_port = 5; else if (negotiated & 0x0080) dev->if_port = 3; else if (negotiated & 0x0040) dev->if_port = 4; else if (negotiated & 0x0020) dev->if_port = 0; else { if (tulip_debug > 1) printk(KERN_INFO "%s: funny autonegotiate result " "csr12 %8.8x advertising %4.4x\n", dev->name, csr12, tp->sym_advertise); tp->nwayset = 0; /* so check if 100baseTx link state is okay */ if ((csr12 & 2) == 0 && (tp->sym_advertise & 0x0180)) dev->if_port = 3; } /* now record the duplex that was negotiated */ tp->full_duplex = 0; if ((dev->if_port == 4) || (dev->if_port == 5)) tp->full_duplex = 1; if (tulip_debug > 1) { if (tp->nwayset) printk(KERN_INFO "%s: Switching to %s based on link " "negotiation %4.4x & %4.4x = %4.4x.\n", dev->name, medianame[dev->if_port], tp->sym_advertise, tp->lpar, negotiated); } /* remember to turn off bit 7 - autonegotiate * enable so we can properly end nway mode and * set duplex (ie. use csr6<9> again) */ csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f); iowrite32(csr14,ioaddr + CSR14); /* now set the data port and operating mode * (see the Data Port Selection comments at * the top of the file */ /* get current csr6 and mask off bits not to touch */ /* see comment at top of file */ tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd); /* so if using if_port 3 or 5 then select the 100baseT * port else select the 10baseT port. * See the Data Port Selection table at the top * of the file which was taken from the PNIC_II.PDF * datasheet */ if (dev->if_port & 1) tp->csr6 |= 0x01840000; else tp->csr6 |= 0x00400000; /* now set the full duplex bit appropriately */ if (tp->full_duplex) tp->csr6 |= 0x00000200; iowrite32(1, ioaddr + CSR13); if (tulip_debug > 2) printk(KERN_DEBUG "%s: Setting CSR6 %8.8x/%x CSR12 " "%8.8x.\n", dev->name, tp->csr6, ioread32(ioaddr + CSR6), ioread32(ioaddr + CSR12)); /* now the following actually writes out the * new csr6 values */ tulip_start_rxtx(tp); return; } else { printk(KERN_INFO "%s: Autonegotiation failed, " "using %s, link beat status %4.4x.\n", dev->name, medianame[dev->if_port], csr12); /* remember to turn off bit 7 - autonegotiate * enable so we don't forget */ csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f); iowrite32(csr14,ioaddr + CSR14); /* what should we do when autonegotiate fails? * should we try again or default to baseline * case. I just don't know. * * for now default to some baseline case */ dev->if_port = 0; tp->nway = 0; tp->nwayset = 1; /* set to 10baseTx-HD - see Data Port Selection * comment given at the top of the file */ tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd); tp->csr6 |= 0x00400000; tulip_restart_rxtx(tp); return; } } if ((tp->nwayset && (csr5 & 0x08000000) && (dev->if_port == 3 || dev->if_port == 5) && (csr12 & 2) == 2) || (tp->nway && (csr5 & (TPLnkFail)))) { /* Link blew? Maybe restart NWay. */ if (tulip_debug > 2) printk(KERN_DEBUG "%s: Ugh! Link blew?\n", dev->name); del_timer_sync(&tp->timer); pnic2_start_nway(dev); tp->timer.expires = RUN_AT(3*HZ); add_timer(&tp->timer); return; } if (dev->if_port == 3 || dev->if_port == 5) { /* we are at 100mb and a potential link change occurred */ if (tulip_debug > 1) printk(KERN_INFO"%s: PNIC2 %s link beat %s.\n", dev->name, medianame[dev->if_port], (csr12 & 2) ? "failed" : "good"); /* check 100 link beat */ tp->nway = 0; tp->nwayset = 1; /* if failed then try doing an nway to get in sync */ if ((csr12 & 2) && ! tp->medialock) { del_timer_sync(&tp->timer); pnic2_start_nway(dev); tp->timer.expires = RUN_AT(3*HZ); add_timer(&tp->timer); } return; } if (dev->if_port == 0 || dev->if_port == 4) { /* we are at 10mb and a potential link change occurred */ if (tulip_debug > 1) printk(KERN_INFO"%s: PNIC2 %s link beat %s.\n", dev->name, medianame[dev->if_port], (csr12 & 4) ? "failed" : "good"); tp->nway = 0; tp->nwayset = 1; /* if failed, try doing an nway to get in sync */ if ((csr12 & 4) && ! tp->medialock) { del_timer_sync(&tp->timer); pnic2_start_nway(dev); tp->timer.expires = RUN_AT(3*HZ); add_timer(&tp->timer); } return; } if (tulip_debug > 1) printk(KERN_INFO"%s: PNIC2 Link Change Default?\n",dev->name); /* if all else fails default to trying 10baseT-HD */ dev->if_port = 0; /* make sure autonegotiate enable is off */ csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f); iowrite32(csr14,ioaddr + CSR14); /* set to 10baseTx-HD - see Data Port Selection * comment given at the top of the file */ tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd); tp->csr6 |= 0x00400000; tulip_restart_rxtx(tp); } |