Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | drivers/net/tulip/pnic2.c |
| 3 | |
Valerie Henson | 6b92801 | 2006-09-08 11:15:34 -0700 | [diff] [blame^] | 4 | Maintained by Valerie Henson <val_henson@linux.intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | Copyright 2000,2001 The Linux Kernel Team |
| 6 | Written/copyright 1994-2001 by Donald Becker. |
| 7 | Modified to hep support PNIC_II by Kevin B. Hendricks |
| 8 | |
| 9 | This software may be used and distributed according to the terms |
| 10 | of the GNU General Public License, incorporated herein by reference. |
| 11 | |
| 12 | Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html} |
| 13 | for more information on this driver, or visit the project |
| 14 | Web page at http://sourceforge.net/projects/tulip/ |
| 15 | |
| 16 | */ |
| 17 | |
| 18 | |
| 19 | /* Understanding the PNIC_II - everything is this file is based |
| 20 | * on the PNIC_II_PDF datasheet which is sorely lacking in detail |
| 21 | * |
| 22 | * As I understand things, here are the registers and bits that |
| 23 | * explain the masks and constants used in this file that are |
| 24 | * either different from the 21142/3 or important for basic operation. |
| 25 | * |
| 26 | * |
| 27 | * CSR 6 (mask = 0xfe3bd1fd of bits not to change) |
| 28 | * ----- |
| 29 | * Bit 24 - SCR |
| 30 | * Bit 23 - PCS |
| 31 | * Bit 22 - TTM (Trasmit Threshold Mode) |
| 32 | * Bit 18 - Port Select |
| 33 | * Bit 13 - Start - 1, Stop - 0 Transmissions |
| 34 | * Bit 11:10 - Loop Back Operation Mode |
| 35 | * Bit 9 - Full Duplex mode (Advertise 10BaseT-FD is CSR14<7> is set) |
| 36 | * Bit 1 - Start - 1, Stop - 0 Receive |
| 37 | * |
| 38 | * |
| 39 | * CSR 14 (mask = 0xfff0ee39 of bits not to change) |
| 40 | * ------ |
| 41 | * Bit 19 - PAUSE-Pause |
| 42 | * Bit 18 - Advertise T4 |
| 43 | * Bit 17 - Advertise 100baseTx-FD |
| 44 | * Bit 16 - Advertise 100baseTx-HD |
| 45 | * Bit 12 - LTE - Link Test Enable |
| 46 | * Bit 7 - ANE - Auto Negotiate Enable |
| 47 | * Bit 6 - HDE - Advertise 10baseT-HD |
| 48 | * Bit 2 - Reset to Power down - kept as 1 for normal operation |
| 49 | * Bit 1 - Loop Back enable for 10baseT MCC |
| 50 | * |
| 51 | * |
| 52 | * CSR 12 |
| 53 | * ------ |
| 54 | * Bit 25 - Partner can do T4 |
| 55 | * Bit 24 - Partner can do 100baseTx-FD |
| 56 | * Bit 23 - Partner can do 100baseTx-HD |
| 57 | * Bit 22 - Partner can do 10baseT-FD |
| 58 | * Bit 21 - Partner can do 10baseT-HD |
| 59 | * Bit 15 - LPN is 1 if all above bits are valid other wise 0 |
| 60 | * Bit 14:12 - autonegotiation state (write 001 to start autonegotiate) |
| 61 | * Bit 3 - Autopolarity state |
| 62 | * Bit 2 - LS10B - link state of 10baseT 0 - good, 1 - failed |
| 63 | * Bit 1 - LS100B - link state of 100baseT 0 - good, 1- faild |
| 64 | * |
| 65 | * |
| 66 | * Data Port Selection Info |
| 67 | *------------------------- |
| 68 | * |
| 69 | * CSR14<7> CSR6<18> CSR6<22> CSR6<23> CSR6<24> MODE/PORT |
| 70 | * 1 0 0 (X) 0 (X) 1 NWAY |
| 71 | * 0 0 1 0 (X) 0 10baseT |
| 72 | * 0 1 0 1 1 (X) 100baseT |
| 73 | * |
| 74 | * |
| 75 | */ |
| 76 | |
| 77 | |
| 78 | |
| 79 | #include <linux/pci.h> |
| 80 | #include "tulip.h" |
| 81 | #include <linux/delay.h> |
| 82 | |
| 83 | |
| 84 | void pnic2_timer(unsigned long data) |
| 85 | { |
| 86 | struct net_device *dev = (struct net_device *)data; |
| 87 | struct tulip_private *tp = netdev_priv(dev); |
| 88 | void __iomem *ioaddr = tp->base_addr; |
| 89 | int next_tick = 60*HZ; |
| 90 | |
| 91 | if (tulip_debug > 3) |
| 92 | printk(KERN_INFO"%s: PNIC2 negotiation status %8.8x.\n", |
| 93 | dev->name,ioread32(ioaddr + CSR12)); |
| 94 | |
| 95 | if (next_tick) { |
| 96 | mod_timer(&tp->timer, RUN_AT(next_tick)); |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | |
| 101 | void pnic2_start_nway(struct net_device *dev) |
| 102 | { |
| 103 | struct tulip_private *tp = netdev_priv(dev); |
| 104 | void __iomem *ioaddr = tp->base_addr; |
| 105 | int csr14; |
| 106 | int csr12; |
| 107 | |
| 108 | /* set up what to advertise during the negotiation */ |
| 109 | |
| 110 | /* load in csr14 and mask off bits not to touch |
| 111 | * comment at top of file explains mask value |
| 112 | */ |
| 113 | csr14 = (ioread32(ioaddr + CSR14) & 0xfff0ee39); |
| 114 | |
| 115 | /* bit 17 - advetise 100baseTx-FD */ |
| 116 | if (tp->sym_advertise & 0x0100) csr14 |= 0x00020000; |
| 117 | |
| 118 | /* bit 16 - advertise 100baseTx-HD */ |
| 119 | if (tp->sym_advertise & 0x0080) csr14 |= 0x00010000; |
| 120 | |
| 121 | /* bit 6 - advertise 10baseT-HD */ |
| 122 | if (tp->sym_advertise & 0x0020) csr14 |= 0x00000040; |
| 123 | |
| 124 | /* Now set bit 12 Link Test Enable, Bit 7 Autonegotiation Enable |
| 125 | * and bit 0 Don't PowerDown 10baseT |
| 126 | */ |
| 127 | csr14 |= 0x00001184; |
| 128 | |
| 129 | if (tulip_debug > 1) |
| 130 | printk(KERN_DEBUG "%s: Restarting PNIC2 autonegotiation, " |
| 131 | "csr14=%8.8x.\n", dev->name, csr14); |
| 132 | |
| 133 | /* tell pnic2_lnk_change we are doing an nway negotiation */ |
| 134 | dev->if_port = 0; |
| 135 | tp->nway = tp->mediasense = 1; |
| 136 | tp->nwayset = tp->lpar = 0; |
| 137 | |
| 138 | /* now we have to set up csr6 for NWAY state */ |
| 139 | |
| 140 | tp->csr6 = ioread32(ioaddr + CSR6); |
| 141 | if (tulip_debug > 1) |
| 142 | printk(KERN_DEBUG "%s: On Entry to Nway, " |
| 143 | "csr6=%8.8x.\n", dev->name, tp->csr6); |
| 144 | |
| 145 | /* mask off any bits not to touch |
| 146 | * comment at top of file explains mask value |
| 147 | */ |
| 148 | tp->csr6 = tp->csr6 & 0xfe3bd1fd; |
| 149 | |
| 150 | /* don't forget that bit 9 is also used for advertising */ |
| 151 | /* advertise 10baseT-FD for the negotiation (bit 9) */ |
| 152 | if (tp->sym_advertise & 0x0040) tp->csr6 |= 0x00000200; |
| 153 | |
| 154 | /* set bit 24 for nway negotiation mode ... |
| 155 | * see Data Port Selection comment at top of file |
| 156 | * and "Stop" - reset both Transmit (bit 13) and Receive (bit 1) |
| 157 | */ |
| 158 | tp->csr6 |= 0x01000000; |
| 159 | iowrite32(csr14, ioaddr + CSR14); |
| 160 | iowrite32(tp->csr6, ioaddr + CSR6); |
| 161 | udelay(100); |
| 162 | |
| 163 | /* all set up so now force the negotiation to begin */ |
| 164 | |
| 165 | /* read in current values and mask off all but the |
| 166 | * Autonegotiation bits 14:12. Writing a 001 to those bits |
| 167 | * should start the autonegotiation |
| 168 | */ |
| 169 | csr12 = (ioread32(ioaddr + CSR12) & 0xffff8fff); |
| 170 | csr12 |= 0x1000; |
| 171 | iowrite32(csr12, ioaddr + CSR12); |
| 172 | } |
| 173 | |
| 174 | |
| 175 | |
| 176 | void pnic2_lnk_change(struct net_device *dev, int csr5) |
| 177 | { |
| 178 | struct tulip_private *tp = netdev_priv(dev); |
| 179 | void __iomem *ioaddr = tp->base_addr; |
| 180 | int csr14; |
| 181 | |
| 182 | /* read the staus register to find out what is up */ |
| 183 | int csr12 = ioread32(ioaddr + CSR12); |
| 184 | |
| 185 | if (tulip_debug > 1) |
| 186 | printk(KERN_INFO"%s: PNIC2 link status interrupt %8.8x, " |
| 187 | " CSR5 %x, %8.8x.\n", dev->name, csr12, |
| 188 | csr5, ioread32(ioaddr + CSR14)); |
| 189 | |
| 190 | /* If NWay finished and we have a negotiated partner capability. |
| 191 | * check bits 14:12 for bit pattern 101 - all is good |
| 192 | */ |
| 193 | if (tp->nway && !tp->nwayset) { |
| 194 | |
| 195 | /* we did an auto negotiation */ |
| 196 | |
| 197 | if ((csr12 & 0x7000) == 0x5000) { |
| 198 | |
| 199 | /* negotiation ended successfully */ |
| 200 | |
| 201 | /* get the link partners reply and mask out all but |
Alexey Dobriyan | 7f927fc | 2006-03-28 01:56:53 -0800 | [diff] [blame] | 202 | * bits 24-21 which show the partners capabilities |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | * and match those to what we advertised |
| 204 | * |
| 205 | * then begin to interpret the results of the negotiation. |
| 206 | * Always go in this order : (we are ignoring T4 for now) |
| 207 | * 100baseTx-FD, 100baseTx-HD, 10baseT-FD, 10baseT-HD |
| 208 | */ |
| 209 | |
| 210 | int negotiated = ((csr12 >> 16) & 0x01E0) & tp->sym_advertise; |
| 211 | tp->lpar = (csr12 >> 16); |
| 212 | tp->nwayset = 1; |
| 213 | |
| 214 | if (negotiated & 0x0100) dev->if_port = 5; |
| 215 | else if (negotiated & 0x0080) dev->if_port = 3; |
| 216 | else if (negotiated & 0x0040) dev->if_port = 4; |
| 217 | else if (negotiated & 0x0020) dev->if_port = 0; |
| 218 | else { |
| 219 | if (tulip_debug > 1) |
| 220 | printk(KERN_INFO "%s: funny autonegotiate result " |
| 221 | "csr12 %8.8x advertising %4.4x\n", |
| 222 | dev->name, csr12, tp->sym_advertise); |
| 223 | tp->nwayset = 0; |
| 224 | /* so check if 100baseTx link state is okay */ |
| 225 | if ((csr12 & 2) == 0 && (tp->sym_advertise & 0x0180)) |
| 226 | dev->if_port = 3; |
| 227 | } |
| 228 | |
| 229 | /* now record the duplex that was negotiated */ |
| 230 | tp->full_duplex = 0; |
| 231 | if ((dev->if_port == 4) || (dev->if_port == 5)) |
| 232 | tp->full_duplex = 1; |
| 233 | |
| 234 | if (tulip_debug > 1) { |
| 235 | if (tp->nwayset) |
| 236 | printk(KERN_INFO "%s: Switching to %s based on link " |
| 237 | "negotiation %4.4x & %4.4x = %4.4x.\n", |
| 238 | dev->name, medianame[dev->if_port], |
| 239 | tp->sym_advertise, tp->lpar, negotiated); |
| 240 | } |
| 241 | |
| 242 | /* remember to turn off bit 7 - autonegotiate |
| 243 | * enable so we can properly end nway mode and |
| 244 | * set duplex (ie. use csr6<9> again) |
| 245 | */ |
| 246 | csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f); |
| 247 | iowrite32(csr14,ioaddr + CSR14); |
| 248 | |
| 249 | |
| 250 | /* now set the data port and operating mode |
| 251 | * (see the Data Port Selection comments at |
| 252 | * the top of the file |
| 253 | */ |
| 254 | |
| 255 | /* get current csr6 and mask off bits not to touch */ |
| 256 | /* see comment at top of file */ |
| 257 | |
| 258 | tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd); |
| 259 | |
| 260 | /* so if using if_port 3 or 5 then select the 100baseT |
| 261 | * port else select the 10baseT port. |
| 262 | * See the Data Port Selection table at the top |
| 263 | * of the file which was taken from the PNIC_II.PDF |
| 264 | * datasheet |
| 265 | */ |
| 266 | if (dev->if_port & 1) tp->csr6 |= 0x01840000; |
| 267 | else tp->csr6 |= 0x00400000; |
| 268 | |
| 269 | /* now set the full duplex bit appropriately */ |
| 270 | if (tp->full_duplex) tp->csr6 |= 0x00000200; |
| 271 | |
| 272 | iowrite32(1, ioaddr + CSR13); |
| 273 | |
| 274 | if (tulip_debug > 2) |
| 275 | printk(KERN_DEBUG "%s: Setting CSR6 %8.8x/%x CSR12 " |
| 276 | "%8.8x.\n", dev->name, tp->csr6, |
| 277 | ioread32(ioaddr + CSR6), ioread32(ioaddr + CSR12)); |
| 278 | |
| 279 | /* now the following actually writes out the |
| 280 | * new csr6 values |
| 281 | */ |
| 282 | tulip_start_rxtx(tp); |
| 283 | |
| 284 | return; |
| 285 | |
| 286 | } else { |
| 287 | printk(KERN_INFO "%s: Autonegotiation failed, " |
| 288 | "using %s, link beat status %4.4x.\n", |
| 289 | dev->name, medianame[dev->if_port], csr12); |
| 290 | |
| 291 | /* remember to turn off bit 7 - autonegotiate |
| 292 | * enable so we don't forget |
| 293 | */ |
| 294 | csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f); |
| 295 | iowrite32(csr14,ioaddr + CSR14); |
| 296 | |
| 297 | /* what should we do when autonegotiate fails? |
| 298 | * should we try again or default to baseline |
| 299 | * case. I just don't know. |
| 300 | * |
| 301 | * for now default to some baseline case |
| 302 | */ |
| 303 | |
| 304 | dev->if_port = 0; |
| 305 | tp->nway = 0; |
| 306 | tp->nwayset = 1; |
| 307 | |
| 308 | /* set to 10baseTx-HD - see Data Port Selection |
| 309 | * comment given at the top of the file |
| 310 | */ |
| 311 | tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd); |
| 312 | tp->csr6 |= 0x00400000; |
| 313 | |
| 314 | tulip_restart_rxtx(tp); |
| 315 | |
| 316 | return; |
| 317 | |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | if ((tp->nwayset && (csr5 & 0x08000000) |
| 322 | && (dev->if_port == 3 || dev->if_port == 5) |
| 323 | && (csr12 & 2) == 2) || (tp->nway && (csr5 & (TPLnkFail)))) { |
| 324 | |
| 325 | /* Link blew? Maybe restart NWay. */ |
| 326 | |
| 327 | if (tulip_debug > 2) |
| 328 | printk(KERN_DEBUG "%s: Ugh! Link blew?\n", dev->name); |
| 329 | |
| 330 | del_timer_sync(&tp->timer); |
| 331 | pnic2_start_nway(dev); |
| 332 | tp->timer.expires = RUN_AT(3*HZ); |
| 333 | add_timer(&tp->timer); |
| 334 | |
| 335 | return; |
| 336 | } |
| 337 | |
| 338 | |
| 339 | if (dev->if_port == 3 || dev->if_port == 5) { |
| 340 | |
| 341 | /* we are at 100mb and a potential link change occurred */ |
| 342 | |
| 343 | if (tulip_debug > 1) |
| 344 | printk(KERN_INFO"%s: PNIC2 %s link beat %s.\n", |
| 345 | dev->name, medianame[dev->if_port], |
| 346 | (csr12 & 2) ? "failed" : "good"); |
| 347 | |
| 348 | /* check 100 link beat */ |
| 349 | |
| 350 | tp->nway = 0; |
| 351 | tp->nwayset = 1; |
| 352 | |
| 353 | /* if failed then try doing an nway to get in sync */ |
| 354 | if ((csr12 & 2) && ! tp->medialock) { |
| 355 | del_timer_sync(&tp->timer); |
| 356 | pnic2_start_nway(dev); |
| 357 | tp->timer.expires = RUN_AT(3*HZ); |
| 358 | add_timer(&tp->timer); |
| 359 | } |
| 360 | |
| 361 | return; |
| 362 | } |
| 363 | |
| 364 | if (dev->if_port == 0 || dev->if_port == 4) { |
| 365 | |
| 366 | /* we are at 10mb and a potential link change occurred */ |
| 367 | |
| 368 | if (tulip_debug > 1) |
| 369 | printk(KERN_INFO"%s: PNIC2 %s link beat %s.\n", |
| 370 | dev->name, medianame[dev->if_port], |
| 371 | (csr12 & 4) ? "failed" : "good"); |
| 372 | |
| 373 | |
| 374 | tp->nway = 0; |
| 375 | tp->nwayset = 1; |
| 376 | |
| 377 | /* if failed, try doing an nway to get in sync */ |
| 378 | if ((csr12 & 4) && ! tp->medialock) { |
| 379 | del_timer_sync(&tp->timer); |
| 380 | pnic2_start_nway(dev); |
| 381 | tp->timer.expires = RUN_AT(3*HZ); |
| 382 | add_timer(&tp->timer); |
| 383 | } |
| 384 | |
| 385 | return; |
| 386 | } |
| 387 | |
| 388 | |
| 389 | if (tulip_debug > 1) |
| 390 | printk(KERN_INFO"%s: PNIC2 Link Change Default?\n",dev->name); |
| 391 | |
| 392 | /* if all else fails default to trying 10baseT-HD */ |
| 393 | dev->if_port = 0; |
| 394 | |
| 395 | /* make sure autonegotiate enable is off */ |
| 396 | csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f); |
| 397 | iowrite32(csr14,ioaddr + CSR14); |
| 398 | |
| 399 | /* set to 10baseTx-HD - see Data Port Selection |
| 400 | * comment given at the top of the file |
| 401 | */ |
| 402 | tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd); |
| 403 | tp->csr6 |= 0x00400000; |
| 404 | |
| 405 | tulip_restart_rxtx(tp); |
| 406 | } |
| 407 | |