drivers/net/tokenring/madgemc.c

   1 /*
   2  *  madgemc.c: Driver for the Madge Smart 16/4 MC16 MCA token ring card.
   3  *
   4  *  Written 2000 by Adam Fritzler
   5  *
   6  *  This software may be used and distributed according to the terms
   7  *  of the GNU General Public License, incorporated herein by reference.
   8  *
   9  *  This driver module supports the following cards:
  10  *      - Madge Smart 16/4 Ringnode MC16
  11  *      - Madge Smart 16/4 Ringnode MC32 (??)
  12  *
  13  *  Maintainer(s):
  14  *    AF        Adam Fritzler           mid@auk.cx
  15  *
  16  *  Modification History:
  17  *      16-Jan-00       AF      Created
  18  *
  19  */
  20 static const char version[] = "madgemc.c: v0.91 23/01/2000 by Adam Fritzler\n";
  21
  22 #include <linux/module.h>
  23 #include <linux/mca-legacy.h>
  24 #include <linux/kernel.h>
  25 #include <linux/errno.h>
  26 #include <linux/pci.h>
  27 #include <linux/init.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/trdevice.h>
  30
  31 #include <asm/system.h>
  32 #include <asm/io.h>
  33 #include <asm/irq.h>
  34
  35 #include "tms380tr.h"
  36 #include "madgemc.h"            /* Madge-specific constants */
  37
  38 #define MADGEMC_IO_EXTENT 32
  39 #define MADGEMC_SIF_OFFSET 0x08
  40
  41 struct madgemc_card {
  42         struct net_device *dev;
  43
  44         /*
  45          * These are read from the BIA ROM.
  46          */
  47         unsigned int manid;
  48         unsigned int cardtype;
  49         unsigned int cardrev;
  50         unsigned int ramsize;
  51
  52         /*
  53          * These are read from the MCA POS registers.
  54          */
  55         unsigned int burstmode:2;
  56         unsigned int fairness:1; /* 0 = Fair, 1 = Unfair */
  57         unsigned int arblevel:4;
  58         unsigned int ringspeed:2; /* 0 = 4mb, 1 = 16, 2 = Auto/none */
  59         unsigned int cabletype:1; /* 0 = RJ45, 1 = DB9 */
  60
  61         struct madgemc_card *next;
  62 };
  63 static struct madgemc_card *madgemc_card_list;
  64
  65
  66 static int madgemc_open(struct net_device *dev);
  67 static int madgemc_close(struct net_device *dev);
  68 static int madgemc_chipset_init(struct net_device *dev);
  69 static void madgemc_read_rom(struct madgemc_card *card);
  70 static unsigned short madgemc_setnselout_pins(struct net_device *dev);
  71 static void madgemc_setcabletype(struct net_device *dev, int type);
  72
  73 static int madgemc_mcaproc(char *buf, int slot, void *d);
  74
  75 static void madgemc_setregpage(struct net_device *dev, int page);
  76 static void madgemc_setsifsel(struct net_device *dev, int val);
  77 static void madgemc_setint(struct net_device *dev, int val);
  78
  79 static irqreturn_t madgemc_interrupt(int irq, void *dev_id, struct pt_regs *regs);
  80
  81 /*
  82  * These work around paging, however they don't guarentee you're on the
  83  * right page.
  84  */
  85 #define SIFREADB(reg) (inb(dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  86 #define SIFWRITEB(val, reg) (outb(val, dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  87 #define SIFREADW(reg) (inw(dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  88 #define SIFWRITEW(val, reg) (outw(val, dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  89
  90 /*
  91  * Read a byte-length value from the register.
  92  */
  93 static unsigned short madgemc_sifreadb(struct net_device *dev, unsigned short reg)
  94 {
  95         unsigned short ret;
  96         if (reg<0x8)
  97                 ret = SIFREADB(reg);
  98         else {
  99                 madgemc_setregpage(dev, 1);
 100                 ret = SIFREADB(reg);
 101                 madgemc_setregpage(dev, 0);
 102         }
 103         return ret;
 104 }
 105
 106 /*
 107  * Write a byte-length value to a register.
 108  */
 109 static void madgemc_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
 110 {
 111         if (reg<0x8)
 112                 SIFWRITEB(val, reg);
 113         else {
 114                 madgemc_setregpage(dev, 1);
 115                 SIFWRITEB(val, reg);
 116                 madgemc_setregpage(dev, 0);
 117         }
 118         return;
 119 }
 120
 121 /*
 122  * Read a word-length value from a register
 123  */
 124 static unsigned short madgemc_sifreadw(struct net_device *dev, unsigned short reg)
 125 {
 126         unsigned short ret;
 127         if (reg<0x8)
 128                 ret = SIFREADW(reg);
 129         else {
 130                 madgemc_setregpage(dev, 1);
 131                 ret = SIFREADW(reg);
 132                 madgemc_setregpage(dev, 0);
 133         }
 134         return ret;
 135 }
 136
 137 /*
 138  * Write a word-length value to a register.
 139  */
 140 static void madgemc_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
 141 {
 142         if (reg<0x8)
 143                 SIFWRITEW(val, reg);
 144         else {
 145                 madgemc_setregpage(dev, 1);
 146                 SIFWRITEW(val, reg);
 147                 madgemc_setregpage(dev, 0);
 148         }
 149         return;
 150 }
 151
 152
 153
 154 static int __init madgemc_probe(void)
 155 {
 156         static int versionprinted;
 157         struct net_device *dev;
 158         struct net_local *tp;
 159         struct madgemc_card *card;
 160         int i,slot = 0;
 161         __u8 posreg[4];
 162
 163         if (!MCA_bus)
 164                 return -1;
 165
 166         while (slot != MCA_NOTFOUND) {
 167                 /*
 168                  * Currently we only support the MC16/32 (MCA ID 002d)
 169                  */
 170                 slot = mca_find_unused_adapter(0x002d, slot);
 171                 if (slot == MCA_NOTFOUND)
 172                         break;
 173
 174                 /*
 175                  * If we get here, we have an adapter.
 176                  */
 177                 if (versionprinted++ == 0)
 178                         printk("%s", version);
 179
 180                 dev = alloc_trdev(sizeof(struct net_local));
 181                 if (dev == NULL) {
 182                         printk("madgemc: unable to allocate dev space\n");
 183                         if (madgemc_card_list)
 184                                 return 0;
 185                         return -1;
 186                 }
 187
 188                 SET_MODULE_OWNER(dev);
 189                 dev->dma = 0;
 190
 191                 /*
 192                  * Fetch MCA config registers
 193                  */
 194                 for(i=0;i<4;i++)
 195                         posreg[i] = mca_read_stored_pos(slot, i+2);
 196
 197                 card = kmalloc(sizeof(struct madgemc_card), GFP_KERNEL);
 198                 if (card==NULL) {
 199                         printk("madgemc: unable to allocate card struct\n");
 200                         free_netdev(dev);
 201                         if (madgemc_card_list)
 202                                 return 0;
 203                         return -1;
 204                 }
 205                 card->dev = dev;
 206
 207                 /*
 208                  * Parse configuration information.  This all comes
 209                  * directly from the publicly available @002d.ADF.
 210                  * Get it from Madge or your local ADF library.
 211                  */
 212
 213                 /*
 214                  * Base address
 215                  */
 216                 dev->base_addr = 0x0a20 +
 217                         ((posreg[2] & MC16_POS2_ADDR2)?0x0400:0) +
 218                         ((posreg[0] & MC16_POS0_ADDR1)?0x1000:0) +
 219                         ((posreg[3] & MC16_POS3_ADDR3)?0x2000:0);
 220
 221                 /*
 222                  * Interrupt line
 223                  */
 224                 switch(posreg[0] >> 6) { /* upper two bits */
 225                 case 0x1: dev->irq = 3; break;
 226                 case 0x2: dev->irq = 9; break; /* IRQ 2 = IRQ 9 */
 227                 case 0x3: dev->irq = 10; break;
 228                 default: dev->irq = 0; break;
 229                 }
 230
 231                 if (dev->irq == 0) {
 232                         printk("%s: invalid IRQ\n", dev->name);
 233                         goto getout1;
 234                 }
 235
 236                 if (!request_region(dev->base_addr, MADGEMC_IO_EXTENT,
 237                                    "madgemc")) {
 238                         printk(KERN_INFO "madgemc: unable to setup Smart MC in slot %d because of I/O base conflict at 0x%04lx\n", slot, dev->base_addr);
 239                         dev->base_addr += MADGEMC_SIF_OFFSET;
 240                         goto getout1;
 241                 }
 242                 dev->base_addr += MADGEMC_SIF_OFFSET;
 243
 244                 /*
 245                  * Arbitration Level
 246                  */
 247                 card->arblevel = ((posreg[0] >> 1) & 0x7) + 8;
 248
 249                 /*
 250                  * Burst mode and Fairness
 251                  */
 252                 card->burstmode = ((posreg[2] >> 6) & 0x3);
 253                 card->fairness = ((posreg[2] >> 4) & 0x1);
 254
 255                 /*
 256                  * Ring Speed
 257                  */
 258                 if ((posreg[1] >> 2)&0x1)
 259                         card->ringspeed = 2; /* not selected */
 260                 else if ((posreg[2] >> 5) & 0x1)
 261                         card->ringspeed = 1; /* 16Mb */
 262                 else
 263                         card->ringspeed = 0; /* 4Mb */
 264
 265                 /*
 266                  * Cable type
 267                  */
 268                 if ((posreg[1] >> 6)&0x1)
 269                         card->cabletype = 1; /* STP/DB9 */
 270                 else
 271                         card->cabletype = 0; /* UTP/RJ-45 */
 272
 273
 274                 /*
 275                  * ROM Info. This requires us to actually twiddle
 276                  * bits on the card, so we must ensure above that
 277                  * the base address is free of conflict (request_region above).
 278                  */
 279                 madgemc_read_rom(card);
 280
 281                 if (card->manid != 0x4d) { /* something went wrong */
 282                         printk(KERN_INFO "%s: Madge MC ROM read failed (unknown manufacturer ID %02x)\n", dev->name, card->manid);
 283                         goto getout;
 284                 }
 285
 286                 if ((card->cardtype != 0x08) && (card->cardtype != 0x0d)) {
 287                         printk(KERN_INFO "%s: Madge MC ROM read failed (unknown card ID %02x)\n", dev->name, card->cardtype);
 288                         goto getout;
 289                 }
 290
 291                 /* All cards except Rev 0 and 1 MC16's have 256kb of RAM */
 292                 if ((card->cardtype == 0x08) && (card->cardrev <= 0x01))
 293                         card->ramsize = 128;
 294                 else
 295                         card->ramsize = 256;
 296
 297                 printk("%s: %s Rev %d at 0x%04lx IRQ %d\n",
 298                        dev->name,
 299                        (card->cardtype == 0x08)?MADGEMC16_CARDNAME:
 300                        MADGEMC32_CARDNAME, card->cardrev,
 301                        dev->base_addr, dev->irq);
 302
 303                 if (card->cardtype == 0x0d)
 304                         printk("%s:     Warning: MC32 support is experimental and highly untested\n", dev->name);
 305
 306                 if (card->ringspeed==2) { /* Unknown */
 307                         printk("%s:     Warning: Ring speed not set in POS -- Please run the reference disk and set it!\n", dev->name);
 308                         card->ringspeed = 1; /* default to 16mb */
 309                 }
 310
 311                 printk("%s:     RAM Size: %dKB\n", dev->name, card->ramsize);
 312
 313                 printk("%s:     Ring Speed: %dMb/sec on %s\n", dev->name,
 314                        (card->ringspeed)?16:4,
 315                        card->cabletype?"STP/DB9":"UTP/RJ-45");
 316                 printk("%s:     Arbitration Level: %d\n", dev->name,
 317                        card->arblevel);
 318
 319                 printk("%s:     Burst Mode: ", dev->name);
 320                 switch(card->burstmode) {
 321                 case 0: printk("Cycle steal"); break;
 322                 case 1: printk("Limited burst"); break;
 323                 case 2: printk("Delayed release"); break;
 324                 case 3: printk("Immediate release"); break;
 325                 }
 326                 printk(" (%s)\n", (card->fairness)?"Unfair":"Fair");
 327
 328
 329                 /*
 330                  * Enable SIF before we assign the interrupt handler,
 331                  * just in case we get spurious interrupts that need
 332                  * handling.
 333                  */
 334                 outb(0, dev->base_addr + MC_CONTROL_REG0); /* sanity */
 335                 madgemc_setsifsel(dev, 1);
 336                 if (request_irq(dev->irq, madgemc_interrupt, SA_SHIRQ,
 337                                "madgemc", dev))
 338                         goto getout;
 339
 340                 madgemc_chipset_init(dev); /* enables interrupts! */
 341                 madgemc_setcabletype(dev, card->cabletype);
 342
 343                 /* Setup MCA structures */
 344                 mca_set_adapter_name(slot, (card->cardtype == 0x08)?MADGEMC16_CARDNAME:MADGEMC32_CARDNAME);
 345                 mca_set_adapter_procfn(slot, madgemc_mcaproc, dev);
 346                 mca_mark_as_used(slot);
 347
 348                 printk("%s:     Ring Station Address: ", dev->name);
 349                 printk("%2.2x", dev->dev_addr[0]);
 350                 for (i = 1; i < 6; i++)
 351                         printk(":%2.2x", dev->dev_addr[i]);
 352                 printk("\n");
 353
 354                 /* XXX is ISA_MAX_ADDRESS correct here? */
 355                 if (tmsdev_init(dev, ISA_MAX_ADDRESS, NULL)) {
 356                         printk("%s: unable to get memory for dev->priv.\n",
 357                                dev->name);
 358                         release_region(dev->base_addr-MADGEMC_SIF_OFFSET,
 359                                MADGEMC_IO_EXTENT);
 360
 361                         kfree(card);
 362                         tmsdev_term(dev);
 363                         free_netdev(dev);
 364                         if (madgemc_card_list)
 365                                 return 0;
 366                         return -1;
 367                 }
 368                 tp = netdev_priv(dev);
 369
 370                 /*
 371                  * The MC16 is physically a 32bit card.  However, Madge
 372                  * insists on calling it 16bit, so I'll assume here that
 373                  * they know what they're talking about.  Cut off DMA
 374                  * at 16mb.
 375                  */
 376                 tp->setnselout = madgemc_setnselout_pins;
 377                 tp->sifwriteb = madgemc_sifwriteb;
 378                 tp->sifreadb = madgemc_sifreadb;
 379                 tp->sifwritew = madgemc_sifwritew;
 380                 tp->sifreadw = madgemc_sifreadw;
 381                 tp->DataRate = (card->ringspeed)?SPEED_16:SPEED_4;
 382
 383                 memcpy(tp->ProductID, "Madge MCA 16/4    ", PROD_ID_SIZE + 1);
 384
 385                 dev->open = madgemc_open;
 386                 dev->stop = madgemc_close;
 387
 388                 if (register_netdev(dev) == 0) {
 389                         /* Enlist in the card list */
 390                         card->next = madgemc_card_list;
 391                         madgemc_card_list = card;
 392                         slot++;
 393                         continue; /* successful, try to find another */
 394                 }
 395
 396                 free_irq(dev->irq, dev);
 397         getout:
 398                 release_region(dev->base_addr-MADGEMC_SIF_OFFSET,
 399                                MADGEMC_IO_EXTENT);
 400         getout1:
 401                 kfree(card);
 402                 free_netdev(dev);
 403                 slot++;
 404         }
 405
 406         if (madgemc_card_list)
 407                 return 0;
 408         return -1;
 409 }
 410
 411 /*
 412  * Handle interrupts generated by the card
 413  *
 414  * The MicroChannel Madge cards need slightly more handling
 415  * after an interrupt than other TMS380 cards do.
 416  *
 417  * First we must make sure it was this card that generated the
 418  * interrupt (since interrupt sharing is allowed).  Then,
 419  * because we're using level-triggered interrupts (as is
 420  * standard on MCA), we must toggle the interrupt line
 421  * on the card in order to claim and acknowledge the interrupt.
 422  * Once that is done, the interrupt should be handlable in
 423  * the normal tms380tr_interrupt() routine.
 424  *
 425  * There's two ways we can check to see if the interrupt is ours,
 426  * both with their own disadvantages...
 427  *
 428  * 1)   Read in the SIFSTS register from the TMS controller.  This
 429  *      is guarenteed to be accurate, however, there's a fairly
 430  *      large performance penalty for doing so: the Madge chips
 431  *      must request the register from the Eagle, the Eagle must
 432  *      read them from its internal bus, and then take the route
 433  *      back out again, for a 16bit read.
 434  *
 435  * 2)   Use the MC_CONTROL_REG0_SINTR bit from the Madge ASICs.
 436  *      The major disadvantage here is that the accuracy of the
 437  *      bit is in question.  However, it cuts out the extra read
 438  *      cycles it takes to read the Eagle's SIF, as its only an
 439  *      8bit read, and theoretically the Madge bit is directly
 440  *      connected to the interrupt latch coming out of the Eagle
 441  *      hardware (that statement is not verified).
 442  *
 443  * I can't determine which of these methods has the best win.  For now,
 444  * we make a compromise.  Use the Madge way for the first interrupt,
 445  * which should be the fast-path, and then once we hit the first
 446  * interrupt, keep on trying using the SIF method until we've
 447  * exhausted all contiguous interrupts.
 448  *
 449  */
 450 static irqreturn_t madgemc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 451 {
 452         int pending,reg1;
 453         struct net_device *dev;
 454
 455         if (!dev_id) {
 456                 printk("madgemc_interrupt: was not passed a dev_id!\n");
 457                 return IRQ_NONE;
 458         }
 459
 460         dev = (struct net_device *)dev_id;
 461
 462         /* Make sure its really us. -- the Madge way */
 463         pending = inb(dev->base_addr + MC_CONTROL_REG0);
 464         if (!(pending & MC_CONTROL_REG0_SINTR))
 465                 return IRQ_NONE; /* not our interrupt */
 466
 467         /*
 468          * Since we're level-triggered, we may miss the rising edge
 469          * of the next interrupt while we're off handling this one,
 470          * so keep checking until the SIF verifies that it has nothing
 471          * left for us to do.
 472          */
 473         pending = STS_SYSTEM_IRQ;
 474         do {
 475                 if (pending & STS_SYSTEM_IRQ) {
 476
 477                         /* Toggle the interrupt to reset the latch on card */
 478                         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 479                         outb(reg1 ^ MC_CONTROL_REG1_SINTEN,
 480                              dev->base_addr + MC_CONTROL_REG1);
 481                         outb(reg1, dev->base_addr + MC_CONTROL_REG1);
 482
 483                         /* Continue handling as normal */
 484                         tms380tr_interrupt(irq, dev_id, regs);
 485
 486                         pending = SIFREADW(SIFSTS); /* restart - the SIF way */
 487
 488                 } else
 489                         return IRQ_HANDLED;
 490         } while (1);
 491
 492         return IRQ_HANDLED; /* not reachable */
 493 }
 494
 495 /*
 496  * Set the card to the prefered ring speed.
 497  *
 498  * Unlike newer cards, the MC16/32 have their speed selection
 499  * circuit connected to the Madge ASICs and not to the TMS380
 500  * NSELOUT pins. Set the ASIC bits correctly here, and return
 501  * zero to leave the TMS NSELOUT bits unaffected.
 502  *
 503  */
 504 unsigned short madgemc_setnselout_pins(struct net_device *dev)
 505 {
 506         unsigned char reg1;
 507         struct net_local *tp = netdev_priv(dev);
 508
 509         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 510
 511         if(tp->DataRate == SPEED_16)
 512                 reg1 |= MC_CONTROL_REG1_SPEED_SEL; /* add for 16mb */
 513         else if (reg1 & MC_CONTROL_REG1_SPEED_SEL)
 514                 reg1 ^= MC_CONTROL_REG1_SPEED_SEL; /* remove for 4mb */
 515         outb(reg1, dev->base_addr + MC_CONTROL_REG1);
 516
 517         return 0; /* no change */
 518 }
 519
 520 /*
 521  * Set the register page.  This equates to the SRSX line
 522  * on the TMS380Cx6.
 523  *
 524  * Register selection is normally done via three contiguous
 525  * bits.  However, some boards (such as the MC16/32) use only
 526  * two bits, plus a separate bit in the glue chip.  This
 527  * sets the SRSX bit (the top bit).  See page 4-17 in the
 528  * Yellow Book for which registers are affected.
 529  *
 530  */
 531 static void madgemc_setregpage(struct net_device *dev, int page)
 532 {
 533         static int reg1;
 534
 535         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 536         if ((page == 0) && (reg1 & MC_CONTROL_REG1_SRSX)) {
 537                 outb(reg1 ^ MC_CONTROL_REG1_SRSX,
 538                      dev->base_addr + MC_CONTROL_REG1);
 539         }
 540         else if (page == 1) {
 541                 outb(reg1 | MC_CONTROL_REG1_SRSX,
 542                      dev->base_addr + MC_CONTROL_REG1);
 543         }
 544         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 545
 546         return;
 547 }
 548
 549 /*
 550  * The SIF registers are not mapped into register space by default
 551  * Set this to 1 to map them, 0 to map the BIA ROM.
 552  *
 553  */
 554 static void madgemc_setsifsel(struct net_device *dev, int val)
 555 {
 556         unsigned int reg0;
 557
 558         reg0 = inb(dev->base_addr + MC_CONTROL_REG0);
 559         if ((val == 0) && (reg0 & MC_CONTROL_REG0_SIFSEL)) {
 560                 outb(reg0 ^ MC_CONTROL_REG0_SIFSEL,
 561                      dev->base_addr + MC_CONTROL_REG0);
 562         } else if (val == 1) {
 563                 outb(reg0 | MC_CONTROL_REG0_SIFSEL,
 564                      dev->base_addr + MC_CONTROL_REG0);
 565         }
 566         reg0 = inb(dev->base_addr + MC_CONTROL_REG0);
 567
 568         return;
 569 }
 570
 571 /*
 572  * Enable SIF interrupts
 573  *
 574  * This does not enable interrupts in the SIF, but rather
 575  * enables SIF interrupts to be passed onto the host.
 576  *
 577  */
 578 static void madgemc_setint(struct net_device *dev, int val)
 579 {
 580         unsigned int reg1;
 581
 582         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 583         if ((val == 0) && (reg1 & MC_CONTROL_REG1_SINTEN)) {
 584                 outb(reg1 ^ MC_CONTROL_REG1_SINTEN,
 585                      dev->base_addr + MC_CONTROL_REG1);
 586         } else if (val == 1) {
 587                 outb(reg1 | MC_CONTROL_REG1_SINTEN,
 588                      dev->base_addr + MC_CONTROL_REG1);
 589         }
 590
 591         return;
 592 }
 593
 594 /*
 595  * Cable type is set via control register 7. Bit zero high
 596  * for UTP, low for STP.
 597  */
 598 static void madgemc_setcabletype(struct net_device *dev, int type)
 599 {
 600         outb((type==0)?MC_CONTROL_REG7_CABLEUTP:MC_CONTROL_REG7_CABLESTP,
 601              dev->base_addr + MC_CONTROL_REG7);
 602 }
 603
 604 /*
 605  * Enable the functions of the Madge chipset needed for
 606  * full working order.
 607  */
 608 static int madgemc_chipset_init(struct net_device *dev)
 609 {
 610         outb(0, dev->base_addr + MC_CONTROL_REG1); /* pull SRESET low */
 611         tms380tr_wait(100); /* wait for card to reset */
 612
 613         /* bring back into normal operating mode */
 614         outb(MC_CONTROL_REG1_NSRESET, dev->base_addr + MC_CONTROL_REG1);
 615
 616         /* map SIF registers */
 617         madgemc_setsifsel(dev, 1);
 618
 619         /* enable SIF interrupts */
 620         madgemc_setint(dev, 1);
 621
 622         return 0;
 623 }
 624
 625 /*
 626  * Disable the board, and put back into power-up state.
 627  */
 628 void madgemc_chipset_close(struct net_device *dev)
 629 {
 630         /* disable interrupts */
 631         madgemc_setint(dev, 0);
 632         /* unmap SIF registers */
 633         madgemc_setsifsel(dev, 0);
 634
 635         return;
 636 }
 637
 638 /*
 639  * Read the card type (MC16 or MC32) from the card.
 640  *
 641  * The configuration registers are stored in two separate
 642  * pages.  Pages are flipped by clearing bit 3 of CONTROL_REG0 (PAGE)
 643  * for page zero, or setting bit 3 for page one.
 644  *
 645  * Page zero contains the following data:
 646  *      Byte 0: Manufacturer ID (0x4D -- ASCII "M")
 647  *      Byte 1: Card type:
 648  *                      0x08 for MC16
 649  *                      0x0D for MC32
 650  *      Byte 2: Card revision
 651  *      Byte 3: Mirror of POS config register 0
 652  *      Byte 4: Mirror of POS 1
 653  *      Byte 5: Mirror of POS 2
 654  *
 655  * Page one contains the following data:
 656  *      Byte 0: Unused
 657  *      Byte 1-6: BIA, MSB to LSB.
 658  *
 659  * Note that to read the BIA, we must unmap the SIF registers
 660  * by clearing bit 2 of CONTROL_REG0 (SIFSEL), as the data
 661  * will reside in the same logical location.  For this reason,
 662  * _never_ read the BIA while the Eagle processor is running!
 663  * The SIF will be completely inaccessible until the BIA operation
 664  * is complete.
 665  *
 666  */
 667 static void madgemc_read_rom(struct madgemc_card *card)
 668 {
 669         unsigned long ioaddr;
 670         unsigned char reg0, reg1, tmpreg0, i;
 671
 672         ioaddr = card->dev->base_addr;
 673
 674         reg0 = inb(ioaddr + MC_CONTROL_REG0);
 675         reg1 = inb(ioaddr + MC_CONTROL_REG1);
 676
 677         /* Switch to page zero and unmap SIF */
 678         tmpreg0 = reg0 & ~(MC_CONTROL_REG0_PAGE + MC_CONTROL_REG0_SIFSEL);
 679         outb(tmpreg0, ioaddr + MC_CONTROL_REG0);
 680
 681         card->manid = inb(ioaddr + MC_ROM_MANUFACTURERID);
 682         card->cardtype = inb(ioaddr + MC_ROM_ADAPTERID);
 683         card->cardrev = inb(ioaddr + MC_ROM_REVISION);
 684
 685         /* Switch to rom page one */
 686         outb(tmpreg0 | MC_CONTROL_REG0_PAGE, ioaddr + MC_CONTROL_REG0);
 687
 688         /* Read BIA */
 689         card->dev->addr_len = 6;
 690         for (i = 0; i < 6; i++)
 691                 card->dev->dev_addr[i] = inb(ioaddr + MC_ROM_BIA_START + i);
 692
 693         /* Restore original register values */
 694         outb(reg0, ioaddr + MC_CONTROL_REG0);
 695         outb(reg1, ioaddr + MC_CONTROL_REG1);
 696
 697         return;
 698 }
 699
 700 static int madgemc_open(struct net_device *dev)
 701 {
 702         /*
 703          * Go ahead and reinitialize the chipset again, just to
 704          * make sure we didn't get left in a bad state.
 705          */
 706         madgemc_chipset_init(dev);
 707         tms380tr_open(dev);
 708         return 0;
 709 }
 710
 711 static int madgemc_close(struct net_device *dev)
 712 {
 713         tms380tr_close(dev);
 714         madgemc_chipset_close(dev);
 715         return 0;
 716 }
 717
 718 /*
 719  * Give some details available from /proc/mca/slotX
 720  */
 721 static int madgemc_mcaproc(char *buf, int slot, void *d)
 722 {
 723         struct net_device *dev = (struct net_device *)d;
 724         struct madgemc_card *curcard = madgemc_card_list;
 725         int len = 0;
 726
 727         while (curcard) { /* search for card struct */
 728                 if (curcard->dev == dev)
 729                         break;
 730                 curcard = curcard->next;
 731         }
 732         len += sprintf(buf+len, "-------\n");
 733         if (curcard) {
 734                 struct net_local *tp = netdev_priv(dev);
 735                 int i;
 736
 737                 len += sprintf(buf+len, "Card Revision: %d\n", curcard->cardrev);
 738                 len += sprintf(buf+len, "RAM Size: %dkb\n", curcard->ramsize);
 739                 len += sprintf(buf+len, "Cable type: %s\n", (curcard->cabletype)?"STP/DB9":"UTP/RJ-45");
 740                 len += sprintf(buf+len, "Configured ring speed: %dMb/sec\n", (curcard->ringspeed)?16:4);
 741                 len += sprintf(buf+len, "Running ring speed: %dMb/sec\n", (tp->DataRate==SPEED_16)?16:4);
 742                 len += sprintf(buf+len, "Device: %s\n", dev->name);
 743                 len += sprintf(buf+len, "IO Port: 0x%04lx\n", dev->base_addr);
 744                 len += sprintf(buf+len, "IRQ: %d\n", dev->irq);
 745                 len += sprintf(buf+len, "Arbitration Level: %d\n", curcard->arblevel);
 746                 len += sprintf(buf+len, "Burst Mode: ");
 747                 switch(curcard->burstmode) {
 748                 case 0: len += sprintf(buf+len, "Cycle steal"); break;
 749                 case 1: len += sprintf(buf+len, "Limited burst"); break;
 750                 case 2: len += sprintf(buf+len, "Delayed release"); break;
 751                 case 3: len += sprintf(buf+len, "Immediate release"); break;
 752                 }
 753                 len += sprintf(buf+len, " (%s)\n", (curcard->fairness)?"Unfair":"Fair");
 754
 755                 len += sprintf(buf+len, "Ring Station Address: ");
 756                 len += sprintf(buf+len, "%2.2x", dev->dev_addr[0]);
 757                 for (i = 1; i < 6; i++)
 758                         len += sprintf(buf+len, " %2.2x", dev->dev_addr[i]);
 759                 len += sprintf(buf+len, "\n");
 760         } else
 761                 len += sprintf(buf+len, "Card not configured\n");
 762
 763         return len;
 764 }
 765
 766 static void __exit madgemc_exit(void)
 767 {
 768         struct net_device *dev;
 769         struct madgemc_card *this_card;
 770
 771         while (madgemc_card_list) {
 772                 dev = madgemc_card_list->dev;
 773                 unregister_netdev(dev);
 774                 release_region(dev->base_addr-MADGEMC_SIF_OFFSET, MADGEMC_IO_EXTENT);
 775                 free_irq(dev->irq, dev);
 776                 tmsdev_term(dev);
 777                 free_netdev(dev);
 778                 this_card = madgemc_card_list;
 779                 madgemc_card_list = this_card->next;
 780                 kfree(this_card);
 781         }
 782 }
 783
 784 module_init(madgemc_probe);
 785 module_exit(madgemc_exit);
 786
 787 MODULE_LICENSE("GPL");
 788
 789 \f
 790 /*
 791  * Local variables:
 792  *  compile-command: "gcc -DMODVERSIONS  -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer -I/usr/src/linux/drivers/net/tokenring/ -c madgemc.c"
 793  *  alt-compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer -I/usr/src/linux/drivers/net/tokenring/ -c madgemc.c"
 794  *  c-set-style "K&R"
 795  *  c-indent-level: 8
 796  *  c-basic-offset: 8
 797  *  tab-width: 8
 798  * End:
 799  */
 800