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 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.h>
  24 #include <linux/kernel.h>
  25 #include <linux/sched.h>
  26 #include <linux/errno.h>
  27 #include <linux/pci.h>
  28 #include <linux/init.h>
  29
  30 #include <asm/system.h>
  31 #include <asm/io.h>
  32 #include <asm/irq.h>
  33
  34 #include <linux/netdevice.h>
  35 #include <linux/trdevice.h>
  36 #include "tms380tr.h"
  37 #include "madgemc.h"            /* Madge-specific constants */
  38
  39 #define MADGEMC_IO_EXTENT 32
  40 #define MADGEMC_SIF_OFFSET 0x08
  41
  42 struct madgemc_card {
  43         struct net_device *dev;
  44
  45         /*
  46          * These are read from the BIA ROM.
  47          */
  48         unsigned int manid;
  49         unsigned int cardtype;
  50         unsigned int cardrev;
  51         unsigned int ramsize;
  52
  53         /*
  54          * These are read from the MCA POS registers.
  55          */
  56         unsigned int burstmode:2;
  57         unsigned int fairness:1; /* 0 = Fair, 1 = Unfair */
  58         unsigned int arblevel:4;
  59         unsigned int ringspeed:2; /* 0 = 4mb, 1 = 16, 2 = Auto/none */
  60         unsigned int cabletype:1; /* 0 = RJ45, 1 = DB9 */
  61
  62         struct madgemc_card *next;
  63 };
  64 static struct madgemc_card *madgemc_card_list = NULL;
  65
  66
  67 int madgemc_probe(void);
  68 static int madgemc_open(struct net_device *dev);
  69 static int madgemc_close(struct net_device *dev);
  70 static int madgemc_chipset_init(struct net_device *dev);
  71 static void madgemc_read_rom(struct madgemc_card *card);
  72 static unsigned short madgemc_setnselout_pins(struct net_device *dev);
  73 static void madgemc_setcabletype(struct net_device *dev, int type);
  74
  75 static int madgemc_mcaproc(char *buf, int slot, void *d);
  76
  77 static void madgemc_setregpage(struct net_device *dev, int page);
  78 static void madgemc_setsifsel(struct net_device *dev, int val);
  79 static void madgemc_setint(struct net_device *dev, int val);
  80
  81 static void madgemc_interrupt(int irq, void *dev_id, struct pt_regs *regs);
  82
  83 /*
  84  * These work around paging, however they dont guarentee you're on the
  85  * right page.
  86  */
  87 #define SIFREADB(reg) (inb(dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  88 #define SIFWRITEB(val, reg) (outb(val, dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  89 #define SIFREADW(reg) (inw(dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  90 #define SIFWRITEW(val, reg) (outw(val, dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  91
  92 /*
  93  * Read a byte-length value from the register.
  94  */
  95 static unsigned short madgemc_sifreadb(struct net_device *dev, unsigned short reg)
  96 {
  97         unsigned short ret;
  98         if (reg<0x8)
  99                 ret = SIFREADB(reg);
 100         else {
 101                 madgemc_setregpage(dev, 1);
 102                 ret = SIFREADB(reg);
 103                 madgemc_setregpage(dev, 0);
 104         }
 105         return ret;
 106 }
 107
 108 /*
 109  * Write a byte-length value to a register.
 110  */
 111 static void madgemc_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
 112 {
 113         if (reg<0x8)
 114                 SIFWRITEB(val, reg);
 115         else {
 116                 madgemc_setregpage(dev, 1);
 117                 SIFWRITEB(val, reg);
 118                 madgemc_setregpage(dev, 0);
 119         }
 120         return;
 121 }
 122
 123 /*
 124  * Read a word-length value from a register
 125  */
 126 static unsigned short madgemc_sifreadw(struct net_device *dev, unsigned short reg)
 127 {
 128         unsigned short ret;
 129         if (reg<0x8)
 130                 ret = SIFREADW(reg);
 131         else {
 132                 madgemc_setregpage(dev, 1);
 133                 ret = SIFREADW(reg);
 134                 madgemc_setregpage(dev, 0);
 135         }
 136         return ret;
 137 }
 138
 139 /*
 140  * Write a word-length value to a register.
 141  */
 142 static void madgemc_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
 143 {
 144         if (reg<0x8)
 145                 SIFWRITEW(val, reg);
 146         else {
 147                 madgemc_setregpage(dev, 1);
 148                 SIFWRITEW(val, reg);
 149                 madgemc_setregpage(dev, 0);
 150         }
 151         return;
 152 }
 153
 154
 155
 156 int __init madgemc_probe(void)
 157 {
 158         static int versionprinted = 0;
 159         struct net_device *dev;
 160         struct net_local *tp;
 161         struct madgemc_card *card;
 162         int i,slot = 0;
 163         __u8 posreg[4];
 164
 165         if (!MCA_bus)
 166                 return -1;
 167
 168         while (slot != MCA_NOTFOUND) {
 169                 /*
 170                  * Currently we only support the MC16/32 (MCA ID 002d)
 171                  */
 172                 slot = mca_find_unused_adapter(0x002d, slot);
 173                 if (slot == MCA_NOTFOUND)
 174                         break;
 175
 176                 /*
 177                  * If we get here, we have an adapter.
 178                  */
 179                 if (versionprinted++ == 0)
 180                         printk("%s", version);
 181
 182                 if ((dev = init_trdev(NULL, 0))==NULL) {
 183                         printk("madgemc: unable to allocate dev space\n");
 184                         return -1;
 185                 }
 186                 dev->dma = 0;
 187
 188                 /*
 189                  * Fetch MCA config registers
 190                  */
 191                 for(i=0;i<4;i++)
 192                         posreg[i] = mca_read_stored_pos(slot, i+2);
 193
 194                 card = kmalloc(sizeof(struct madgemc_card), GFP_KERNEL);
 195                 if (card==NULL) {
 196                         printk("madgemc: unable to allocate card struct\n");
 197                         return -1;
 198                 }
 199                 card->dev = dev;
 200
 201                 /*
 202                  * Parse configuration information.  This all comes
 203                  * directly from the publicly available @002d.ADF.
 204                  * Get it from Madge or your local ADF library.
 205                  */
 206
 207                 /*
 208                  * Base address
 209                  */
 210                 dev->base_addr = 0x0a20 +
 211                         ((posreg[2] & MC16_POS2_ADDR2)?0x0400:0) +
 212                         ((posreg[0] & MC16_POS0_ADDR1)?0x1000:0) +
 213                         ((posreg[3] & MC16_POS3_ADDR3)?0x2000:0);
 214
 215                 /*
 216                  * Interrupt line
 217                  */
 218                 switch(posreg[0] >> 6) { /* upper two bits */
 219                 case 0x1: dev->irq = 3; break;
 220                 case 0x2: dev->irq = 9; break; /* IRQ 2 = IRQ 9 */
 221                 case 0x3: dev->irq = 10; break;
 222                 default: dev->irq = 0; break;
 223                 }
 224
 225                 if (dev->irq == 0) {
 226                         printk("%s: invalid IRQ\n", dev->name);
 227                         goto getout;
 228                 }
 229
 230                 request_region(dev->base_addr, MADGEMC_IO_EXTENT, "madgemc");
 231 #if 0
 232                 /* why is this not working? */
 233                 if (request_region(dev->base_addr, MADGEMC_IO_EXTENT,
 234                                    "madgemc")) {
 235                         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);
 236                         dev->base_addr += MADGEMC_SIF_OFFSET;
 237                         goto getout;
 238                 }
 239 #endif
 240                 dev->base_addr += MADGEMC_SIF_OFFSET;
 241
 242                 /*
 243                  * Arbitration Level
 244                  */
 245                 card->arblevel = ((posreg[0] >> 1) & 0x7) + 8;
 246
 247                 /*
 248                  * Burst mode and Fairness
 249                  */
 250                 card->burstmode = ((posreg[2] >> 6) & 0x3);
 251                 card->fairness = ((posreg[2] >> 4) & 0x1);
 252
 253                 /*
 254                  * Ring Speed
 255                  */
 256                 if ((posreg[1] >> 2)&0x1)
 257                         card->ringspeed = 2; /* not selected */
 258                 else if ((posreg[2] >> 5) & 0x1)
 259                         card->ringspeed = 1; /* 16Mb */
 260                 else
 261                         card->ringspeed = 0; /* 4Mb */
 262
 263                 /*
 264                  * Cable type
 265                  */
 266                 if ((posreg[1] >> 6)&0x1)
 267                         card->cabletype = 1; /* STP/DB9 */
 268                 else
 269                         card->cabletype = 0; /* UTP/RJ-45 */
 270
 271
 272                 /*
 273                  * ROM Info. This requires us to actually twiddle
 274                  * bits on the card, so we must ensure above that
 275                  * the base address is free of conflict (request_region above).
 276                  */
 277                 madgemc_read_rom(card);
 278
 279                 if (card->manid != 0x4d) { /* something went wrong */
 280                         printk(KERN_INFO "%s: Madge MC ROM read failed (unknown manufacturer ID %02x)\n", dev->name, card->manid);
 281                         goto getout;
 282                 }
 283
 284                 if ((card->cardtype != 0x08) && (card->cardtype != 0x0d)) {
 285                         printk(KERN_INFO "%s: Madge MC ROM read failed (unknown card ID %02x)\n", dev->name, card->cardtype);
 286                         goto getout;
 287                 }
 288
 289                 /* All cards except Rev 0 and 1 MC16's have 256kb of RAM */
 290                 if ((card->cardtype == 0x08) && (card->cardrev <= 0x01))
 291                         card->ramsize = 128;
 292                 else
 293                         card->ramsize = 256;
 294
 295                 printk("%s: %s Rev %d at 0x%04lx IRQ %d\n",
 296                        dev->name,
 297                        (card->cardtype == 0x08)?MADGEMC16_CARDNAME:
 298                        MADGEMC32_CARDNAME, card->cardrev,
 299                        dev->base_addr, dev->irq);
 300
 301                 if (card->cardtype == 0x0d)
 302                         printk("%s:     Warning: MC32 support is experimental and highly untested\n", dev->name);
 303
 304                 if (card->ringspeed==2) { /* Unknown */
 305                         printk("%s:     Warning: Ring speed not set in POS -- Please run the reference disk and set it!\n", dev->name);
 306                         card->ringspeed = 1; /* default to 16mb */
 307                 }
 308
 309                 printk("%s:     RAM Size: %dKB\n", dev->name, card->ramsize);
 310
 311                 printk("%s:     Ring Speed: %dMb/sec on %s\n", dev->name,
 312                        (card->ringspeed)?16:4,
 313                        card->cabletype?"STP/DB9":"UTP/RJ-45");
 314                 printk("%s:     Arbitration Level: %d\n", dev->name,
 315                        card->arblevel);
 316
 317                 printk("%s:     Burst Mode: ", dev->name);
 318                 switch(card->burstmode) {
 319                 case 0: printk("Cycle steal"); break;
 320                 case 1: printk("Limited burst"); break;
 321                 case 2: printk("Delayed release"); break;
 322                 case 3: printk("Immediate release"); break;
 323                 }
 324                 printk(" (%s)\n", (card->fairness)?"Unfair":"Fair");
 325
 326
 327                 /*
 328                  * Enable SIF before we assign the interrupt handler,
 329                  * just in case we get spurious interrupts that need
 330                  * handling.
 331                  */
 332                 outb(0, dev->base_addr + MC_CONTROL_REG0); /* sanity */
 333                 madgemc_setsifsel(dev, 1);
 334                 if(request_irq(dev->irq, madgemc_interrupt, SA_SHIRQ,
 335                                "madgemc", dev))
 336                         goto getout;
 337
 338                 madgemc_chipset_init(dev); /* enables interrupts! */
 339                 madgemc_setcabletype(dev, card->cabletype);
 340
 341                 /* Setup MCA structures */
 342                 mca_set_adapter_name(slot, (card->cardtype == 0x08)?MADGEMC16_CARDNAME:MADGEMC32_CARDNAME);
 343                 mca_set_adapter_procfn(slot, madgemc_mcaproc, dev);
 344                 mca_mark_as_used(slot);
 345
 346                 printk("%s:     Ring Station Address: ", dev->name);
 347                 printk("%2.2x", dev->dev_addr[0]);
 348                 for (i = 1; i < 6; i++)
 349                         printk(":%2.2x", dev->dev_addr[i]);
 350                 printk("\n");
 351
 352                 if (tmsdev_init(dev)) {
 353                         printk("%s: unable to get memory for dev->priv.\n",
 354                                dev->name);
 355                         return -1;
 356                 }
 357                 tp = (struct net_local *)dev->priv;
 358
 359                 /*
 360                  * The MC16 is physically a 32bit card.  However, Madge
 361                  * insists on calling it 16bit, so I'll assume here that
 362                  * they know what they're talking about.  Cut off DMA
 363                  * at 16mb.
 364                  */
 365                 tp->dmalimit = ISA_MAX_ADDRESS; /* XXX: ?? */
 366                 tp->setnselout = madgemc_setnselout_pins;
 367                 tp->sifwriteb = madgemc_sifwriteb;
 368                 tp->sifreadb = madgemc_sifreadb;
 369                 tp->sifwritew = madgemc_sifwritew;
 370                 tp->sifreadw = madgemc_sifreadw;
 371                 tp->DataRate = (card->ringspeed)?SPEED_16:SPEED_4;
 372
 373                 memcpy(tp->ProductID, "Madge MCA 16/4    ", PROD_ID_SIZE + 1);
 374
 375                 dev->open = madgemc_open;
 376                 dev->stop = madgemc_close;
 377
 378                 if (register_trdev(dev) == 0) {
 379                         /* Enlist in the card list */
 380                         card->next = madgemc_card_list;
 381                         madgemc_card_list = card;
 382                 } else {
 383                         printk("madgemc: register_trdev() returned non-zero.\n");
 384
 385                         kfree(card);
 386                         kfree(dev->priv);
 387                         kfree(dev);
 388                         return -1;
 389                 }
 390
 391                 slot++;
 392                 continue; /* successful, try to find another */
 393
 394         getout:
 395                 release_region(dev->base_addr-MADGEMC_SIF_OFFSET,
 396                                MADGEMC_IO_EXTENT);
 397                 kfree(card);
 398                 kfree(dev); /* release_trdev? */
 399                 slot++;
 400         }
 401
 402         if (madgemc_card_list)
 403                 return 0;
 404         return -1;
 405 }
 406
 407 /*
 408  * Handle interrupts generated by the card
 409  *
 410  * The MicroChannel Madge cards need slightly more handling
 411  * after an interrupt than other TMS380 cards do.
 412  *
 413  * First we must make sure it was this card that generated the
 414  * interrupt (since interrupt sharing is allowed).  Then,
 415  * because we're using level-triggered interrupts (as is
 416  * standard on MCA), we must toggle the interrupt line
 417  * on the card in order to claim and acknowledge the interrupt.
 418  * Once that is done, the interrupt should be handlable in
 419  * the normal tms380tr_interrupt() routine.
 420  *
 421  * There's two ways we can check to see if the interrupt is ours,
 422  * both with their own disadvantages...
 423  *
 424  * 1)   Read in the SIFSTS register from the TMS controller.  This
 425  *      is guarenteed to be accurate, however, there's a fairly
 426  *      large performance penalty for doing so: the Madge chips
 427  *      must request the register from the Eagle, the Eagle must
 428  *      read them from its internal bus, and then take the route
 429  *      back out again, for a 16bit read.
 430  *
 431  * 2)   Use the MC_CONTROL_REG0_SINTR bit from the Madge ASICs.
 432  *      The major disadvantage here is that the accuracy of the
 433  *      bit is in question.  However, it cuts out the extra read
 434  *      cycles it takes to read the Eagle's SIF, as its only an
 435  *      8bit read, and theoretically the Madge bit is directly
 436  *      connected to the interrupt latch coming out of the Eagle
 437  *      hardware (that statement is not verified).
 438  *
 439  * I can't determine which of these methods has the best win.  For now,
 440  * we make a compromise.  Use the Madge way for the first interrupt,
 441  * which should be the fast-path, and then once we hit the first
 442  * interrupt, keep on trying using the SIF method until we've
 443  * exhausted all contiguous interrupts.
 444  *
 445  */
 446 static void madgemc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 447 {
 448         int pending,reg1;
 449         struct net_device *dev;
 450
 451         if (!dev_id) {
 452                 printk("madgemc_interrupt: was not passed a dev_id!\n");
 453                 return;
 454         }
 455
 456         dev = (struct net_device *)dev_id;
 457
 458         /* Make sure its really us. -- the Madge way */
 459         pending = inb(dev->base_addr + MC_CONTROL_REG0);
 460         if (!(pending & MC_CONTROL_REG0_SINTR))
 461                 return; /* not our interrupt */
 462
 463         /*
 464          * Since we're level-triggered, we may miss the rising edge
 465          * of the next interrupt while we're off handling this one,
 466          * so keep checking until the SIF verifies that it has nothing
 467          * left for us to do.
 468          */
 469         pending = STS_SYSTEM_IRQ;
 470         do {
 471                 if (pending & STS_SYSTEM_IRQ) {
 472
 473                         /* Toggle the interrupt to reset the latch on card */
 474                         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 475                         outb(reg1 ^ MC_CONTROL_REG1_SINTEN,
 476                              dev->base_addr + MC_CONTROL_REG1);
 477                         outb(reg1, dev->base_addr + MC_CONTROL_REG1);
 478
 479                         /* Continue handling as normal */
 480                         tms380tr_interrupt(irq, dev_id, regs);
 481
 482                         pending = SIFREADW(SIFSTS); /* restart - the SIF way */
 483
 484                 } else
 485                         return;
 486         } while (1);
 487
 488         return; /* not reachable */
 489 }
 490
 491 /*
 492  * Set the card to the prefered ring speed.
 493  *
 494  * Unlike newer cards, the MC16/32 have their speed selection
 495  * circuit connected to the Madge ASICs and not to the TMS380
 496  * NSELOUT pins. Set the ASIC bits correctly here, and return
 497  * zero to leave the TMS NSELOUT bits unaffected.
 498  *
 499  */
 500 unsigned short madgemc_setnselout_pins(struct net_device *dev)
 501 {
 502         unsigned char reg1;
 503         struct net_local *tp = (struct net_local *)dev->priv;
 504
 505         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 506
 507         if(tp->DataRate == SPEED_16)
 508                 reg1 |= MC_CONTROL_REG1_SPEED_SEL; /* add for 16mb */
 509         else if (reg1 & MC_CONTROL_REG1_SPEED_SEL)
 510                 reg1 ^= MC_CONTROL_REG1_SPEED_SEL; /* remove for 4mb */
 511         outb(reg1, dev->base_addr + MC_CONTROL_REG1);
 512
 513         return 0; /* no change */
 514 }
 515
 516 /*
 517  * Set the register page.  This equates to the SRSX line
 518  * on the TMS380Cx6.
 519  *
 520  * Register selection is normally done via three contiguous
 521  * bits.  However, some boards (such as the MC16/32) use only
 522  * two bits, plus a seperate bit in the glue chip.  This
 523  * sets the SRSX bit (the top bit).  See page 4-17 in the
 524  * Yellow Book for which registers are affected.
 525  *
 526  */
 527 static void madgemc_setregpage(struct net_device *dev, int page)
 528 {
 529         static int reg1 = 0;
 530
 531         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 532         if ((page == 0) && (reg1 & MC_CONTROL_REG1_SRSX)) {
 533                 outb(reg1 ^ MC_CONTROL_REG1_SRSX,
 534                      dev->base_addr + MC_CONTROL_REG1);
 535         }
 536         else if (page == 1) {
 537                 outb(reg1 | MC_CONTROL_REG1_SRSX,
 538                      dev->base_addr + MC_CONTROL_REG1);
 539         }
 540         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 541
 542         return;
 543 }
 544
 545 /*
 546  * The SIF registers are not mapped into register space by default
 547  * Set this to 1 to map them, 0 to map the BIA ROM.
 548  *
 549  */
 550 static void madgemc_setsifsel(struct net_device *dev, int val)
 551 {
 552         unsigned int reg0;
 553
 554         reg0 = inb(dev->base_addr + MC_CONTROL_REG0);
 555         if ((val == 0) && (reg0 & MC_CONTROL_REG0_SIFSEL)) {
 556                 outb(reg0 ^ MC_CONTROL_REG0_SIFSEL,
 557                      dev->base_addr + MC_CONTROL_REG0);
 558         } else if (val == 1) {
 559                 outb(reg0 | MC_CONTROL_REG0_SIFSEL,
 560                      dev->base_addr + MC_CONTROL_REG0);
 561         }
 562         reg0 = inb(dev->base_addr + MC_CONTROL_REG0);
 563
 564         return;
 565 }
 566
 567 /*
 568  * Enable SIF interrupts
 569  *
 570  * This does not enable interrupts in the SIF, but rather
 571  * enables SIF interrupts to be passed onto the host.
 572  *
 573  */
 574 static void madgemc_setint(struct net_device *dev, int val)
 575 {
 576         unsigned int reg1;
 577
 578         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 579         if ((val == 0) && (reg1 & MC_CONTROL_REG1_SINTEN)) {
 580                 outb(reg1 ^ MC_CONTROL_REG1_SINTEN,
 581                      dev->base_addr + MC_CONTROL_REG1);
 582         } else if (val == 1) {
 583                 outb(reg1 | MC_CONTROL_REG1_SINTEN,
 584                      dev->base_addr + MC_CONTROL_REG1);
 585         }
 586
 587         return;
 588 }
 589
 590 /*
 591  * Cable type is set via control register 7. Bit zero high
 592  * for UTP, low for STP.
 593  */
 594 static void madgemc_setcabletype(struct net_device *dev, int type)
 595 {
 596         outb((type==0)?MC_CONTROL_REG7_CABLEUTP:MC_CONTROL_REG7_CABLESTP,
 597              dev->base_addr + MC_CONTROL_REG7);
 598 }
 599
 600 /*
 601  * Enable the functions of the Madge chipset needed for
 602  * full working order.
 603  */
 604 static int madgemc_chipset_init(struct net_device *dev)
 605 {
 606         outb(0, dev->base_addr + MC_CONTROL_REG1); /* pull SRESET low */
 607         tms380tr_wait(100); /* wait for card to reset */
 608
 609         /* bring back into normal operating mode */
 610         outb(MC_CONTROL_REG1_NSRESET, dev->base_addr + MC_CONTROL_REG1);
 611
 612         /* map SIF registers */
 613         madgemc_setsifsel(dev, 1);
 614
 615         /* enable SIF interrupts */
 616         madgemc_setint(dev, 1);
 617
 618         return 0;
 619 }
 620
 621 /*
 622  * Disable the board, and put back into power-up state.
 623  */
 624 void madgemc_chipset_close(struct net_device *dev)
 625 {
 626         /* disable interrupts */
 627         madgemc_setint(dev, 0);
 628         /* unmap SIF registers */
 629         madgemc_setsifsel(dev, 0);
 630
 631         return;
 632 }
 633
 634 /*
 635  * Read the card type (MC16 or MC32) from the card.
 636  *
 637  * The configuration registers are stored in two seperate
 638  * pages.  Pages are flipped by clearing bit 3 of CONTROL_REG0 (PAGE)
 639  * for page zero, or setting bit 3 for page one.
 640  *
 641  * Page zero contains the following data:
 642  *      Byte 0: Manufacturer ID (0x4D -- ASCII "M")
 643  *      Byte 1: Card type:
 644  *                      0x08 for MC16
 645  *                      0x0D for MC32
 646  *      Byte 2: Card revision
 647  *      Byte 3: Mirror of POS config register 0
 648  *      Byte 4: Mirror of POS 1
 649  *      Byte 5: Mirror of POS 2
 650  *
 651  * Page one contains the following data:
 652  *      Byte 0: Unused
 653  *      Byte 1-6: BIA, MSB to LSB.
 654  *
 655  * Note that to read the BIA, we must unmap the SIF registers
 656  * by clearing bit 2 of CONTROL_REG0 (SIFSEL), as the data
 657  * will reside in the same logical location.  For this reason,
 658  * _never_ read the BIA while the Eagle processor is running!
 659  * The SIF will be completely inaccessible until the BIA operation
 660  * is complete.
 661  *
 662  */
 663 static void madgemc_read_rom(struct madgemc_card *card)
 664 {
 665         unsigned long ioaddr;
 666         unsigned char reg0, reg1, tmpreg0, i;
 667
 668         ioaddr = card->dev->base_addr;
 669
 670         reg0 = inb(ioaddr + MC_CONTROL_REG0);
 671         reg1 = inb(ioaddr + MC_CONTROL_REG1);
 672
 673         /* Switch to page zero and unmap SIF */
 674         tmpreg0 = reg0 & ~(MC_CONTROL_REG0_PAGE + MC_CONTROL_REG0_SIFSEL);
 675         outb(tmpreg0, ioaddr + MC_CONTROL_REG0);
 676
 677         card->manid = inb(ioaddr + MC_ROM_MANUFACTURERID);
 678         card->cardtype = inb(ioaddr + MC_ROM_ADAPTERID);
 679         card->cardrev = inb(ioaddr + MC_ROM_REVISION);
 680
 681         /* Switch to rom page one */
 682         outb(tmpreg0 | MC_CONTROL_REG0_PAGE, ioaddr + MC_CONTROL_REG0);
 683
 684         /* Read BIA */
 685         card->dev->addr_len = 6;
 686         for (i = 0; i < 6; i++)
 687                 card->dev->dev_addr[i] = inb(ioaddr + MC_ROM_BIA_START + i);
 688
 689         /* Restore original register values */
 690         outb(reg0, ioaddr + MC_CONTROL_REG0);
 691         outb(reg1, ioaddr + MC_CONTROL_REG1);
 692
 693         return;
 694 }
 695
 696 static int madgemc_open(struct net_device *dev)
 697 {
 698         /*
 699          * Go ahead and reinitialize the chipset again, just to
 700          * make sure we didn't get left in a bad state.
 701          */
 702         madgemc_chipset_init(dev);
 703         tms380tr_open(dev);
 704         MOD_INC_USE_COUNT;
 705         return 0;
 706 }
 707
 708 static int madgemc_close(struct net_device *dev)
 709 {
 710         tms380tr_close(dev);
 711         madgemc_chipset_close(dev);
 712         MOD_DEC_USE_COUNT;
 713         return 0;
 714 }
 715
 716 /*
 717  * Give some details available from /proc/mca/slotX
 718  */
 719 static int madgemc_mcaproc(char *buf, int slot, void *d)
 720 {
 721         struct net_device *dev = (struct net_device *)d;
 722         struct madgemc_card *curcard = madgemc_card_list;
 723         int len = 0;
 724
 725         while (curcard) { /* search for card struct */
 726                 if (curcard->dev == dev)
 727                         break;
 728                 curcard = curcard->next;
 729         }
 730         len += sprintf(buf+len, "-------\n");
 731         if (curcard) {
 732                 struct net_local *tp = (struct net_local *)dev->priv;
 733                 int i;
 734
 735                 len += sprintf(buf+len, "Card Revision: %d\n", curcard->cardrev);
 736                 len += sprintf(buf+len, "RAM Size: %dkb\n", curcard->ramsize);
 737                 len += sprintf(buf+len, "Cable type: %s\n", (curcard->cabletype)?"STP/DB9":"UTP/RJ-45");
 738                 len += sprintf(buf+len, "Configured ring speed: %dMb/sec\n", (curcard->ringspeed)?16:4);
 739                 len += sprintf(buf+len, "Running ring speed: %dMb/sec\n", (tp->DataRate==SPEED_16)?16:4);
 740                 len += sprintf(buf+len, "Device: %s\n", dev->name);
 741                 len += sprintf(buf+len, "IO Port: 0x%04lx\n", dev->base_addr);
 742                 len += sprintf(buf+len, "IRQ: %d\n", dev->irq);
 743                 len += sprintf(buf+len, "Arbitration Level: %d\n", curcard->arblevel);
 744                 len += sprintf(buf+len, "Burst Mode: ");
 745                 switch(curcard->burstmode) {
 746                 case 0: len += sprintf(buf+len, "Cycle steal"); break;
 747                 case 1: len += sprintf(buf+len, "Limited burst"); break;
 748                 case 2: len += sprintf(buf+len, "Delayed release"); break;
 749                 case 3: len += sprintf(buf+len, "Immediate release"); break;
 750                 }
 751                 len += sprintf(buf+len, " (%s)\n", (curcard->fairness)?"Unfair":"Fair");
 752
 753                 len += sprintf(buf+len, "Ring Station Address: ");
 754                 len += sprintf(buf+len, "%2.2x", dev->dev_addr[0]);
 755                 for (i = 1; i < 6; i++)
 756                         len += sprintf(buf+len, " %2.2x", dev->dev_addr[i]);
 757                 len += sprintf(buf+len, "\n");
 758         } else
 759                 len += sprintf(buf+len, "Card not configured\n");
 760
 761         return len;
 762 }
 763
 764 #ifdef MODULE
 765
 766 int init_module(void)
 767 {
 768         /* Probe for cards. */
 769         if (madgemc_probe()) {
 770                 printk(KERN_NOTICE "madgemc.c: No cards found.\n");
 771         }
 772         /* lock_tms380_module(); */
 773         return (0);
 774 }
 775
 776 void cleanup_module(void)
 777 {
 778         struct net_device *dev;
 779         struct madgemc_card *this_card;
 780
 781         while (madgemc_card_list) {
 782                 dev = madgemc_card_list->dev;
 783                 unregister_trdev(dev);
 784                 release_region(dev->base_addr-MADGEMC_SIF_OFFSET, MADGEMC_IO_EXTENT);
 785                 free_irq(dev->irq, dev);
 786                 kfree(dev->priv);
 787                 kfree(dev);
 788                 this_card = madgemc_card_list;
 789                 madgemc_card_list = this_card->next;
 790                 kfree(this_card);
 791         }
 792         /* unlock_tms380_module(); */
 793 }
 794 #endif /* MODULE */
 795
 796 \f
 797 /*
 798  * Local variables:
 799  *  compile-command: "gcc -DMODVERSIONS  -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer -I/usr/src/linux/drivers/net/tokenring/ -c madgemc.c"
 800  *  alt-compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer -I/usr/src/linux/drivers/net/tokenring/ -c madgemc.c"
 801  *  c-set-style "K&R"
 802  *  c-indent-level: 8
 803  *  c-basic-offset: 8
 804  *  tab-width: 8
 805  * End:
 806  */