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.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 card_info {
  42         /*
  43          * These are read from the BIA ROM.
  44          */
  45         unsigned int manid;
  46         unsigned int cardtype;
  47         unsigned int cardrev;
  48         unsigned int ramsize;
  49
  50         /*
  51          * These are read from the MCA POS registers.
  52          */
  53         unsigned int burstmode:2;
  54         unsigned int fairness:1; /* 0 = Fair, 1 = Unfair */
  55         unsigned int arblevel:4;
  56         unsigned int ringspeed:2; /* 0 = 4mb, 1 = 16, 2 = Auto/none */
  57         unsigned int cabletype:1; /* 0 = RJ45, 1 = DB9 */
  58 };
  59
  60 static int madgemc_open(struct net_device *dev);
  61 static int madgemc_close(struct net_device *dev);
  62 static int madgemc_chipset_init(struct net_device *dev);
  63 static void madgemc_read_rom(struct net_device *dev, struct card_info *card);
  64 static unsigned short madgemc_setnselout_pins(struct net_device *dev);
  65 static void madgemc_setcabletype(struct net_device *dev, int type);
  66
  67 static int madgemc_mcaproc(char *buf, int slot, void *d);
  68
  69 static void madgemc_setregpage(struct net_device *dev, int page);
  70 static void madgemc_setsifsel(struct net_device *dev, int val);
  71 static void madgemc_setint(struct net_device *dev, int val);
  72
  73 static irqreturn_t madgemc_interrupt(int irq, void *dev_id);
  74
  75 /*
  76  * These work around paging, however they don't guarentee you're on the
  77  * right page.
  78  */
  79 #define SIFREADB(reg) (inb(dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  80 #define SIFWRITEB(val, reg) (outb(val, dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  81 #define SIFREADW(reg) (inw(dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  82 #define SIFWRITEW(val, reg) (outw(val, dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  83
  84 /*
  85  * Read a byte-length value from the register.
  86  */
  87 static unsigned short madgemc_sifreadb(struct net_device *dev, unsigned short reg)
  88 {
  89         unsigned short ret;
  90         if (reg<0x8)
  91                 ret = SIFREADB(reg);
  92         else {
  93                 madgemc_setregpage(dev, 1);
  94                 ret = SIFREADB(reg);
  95                 madgemc_setregpage(dev, 0);
  96         }
  97         return ret;
  98 }
  99
 100 /*
 101  * Write a byte-length value to a register.
 102  */
 103 static void madgemc_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
 104 {
 105         if (reg<0x8)
 106                 SIFWRITEB(val, reg);
 107         else {
 108                 madgemc_setregpage(dev, 1);
 109                 SIFWRITEB(val, reg);
 110                 madgemc_setregpage(dev, 0);
 111         }
 112         return;
 113 }
 114
 115 /*
 116  * Read a word-length value from a register
 117  */
 118 static unsigned short madgemc_sifreadw(struct net_device *dev, unsigned short reg)
 119 {
 120         unsigned short ret;
 121         if (reg<0x8)
 122                 ret = SIFREADW(reg);
 123         else {
 124                 madgemc_setregpage(dev, 1);
 125                 ret = SIFREADW(reg);
 126                 madgemc_setregpage(dev, 0);
 127         }
 128         return ret;
 129 }
 130
 131 /*
 132  * Write a word-length value to a register.
 133  */
 134 static void madgemc_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
 135 {
 136         if (reg<0x8)
 137                 SIFWRITEW(val, reg);
 138         else {
 139                 madgemc_setregpage(dev, 1);
 140                 SIFWRITEW(val, reg);
 141                 madgemc_setregpage(dev, 0);
 142         }
 143         return;
 144 }
 145
 146
 147
 148 static int __devinit madgemc_probe(struct device *device)
 149 {
 150         static int versionprinted;
 151         struct net_device *dev;
 152         struct net_local *tp;
 153         struct card_info *card;
 154         struct mca_device *mdev = to_mca_device(device);
 155         int ret = 0, i = 0;
 156
 157         if (versionprinted++ == 0)
 158                 printk("%s", version);
 159
 160         if(mca_device_claimed(mdev))
 161                 return -EBUSY;
 162         mca_device_set_claim(mdev, 1);
 163
 164         dev = alloc_trdev(sizeof(struct net_local));
 165         if (!dev) {
 166                 printk("madgemc: unable to allocate dev space\n");
 167                 mca_device_set_claim(mdev, 0);
 168                 ret = -ENOMEM;
 169                 goto getout;
 170         }
 171
 172         SET_MODULE_OWNER(dev);
 173         dev->dma = 0;
 174
 175         card = kmalloc(sizeof(struct card_info), GFP_KERNEL);
 176         if (card==NULL) {
 177                 printk("madgemc: unable to allocate card struct\n");
 178                 ret = -ENOMEM;
 179                 goto getout1;
 180         }
 181
 182         /*
 183          * Parse configuration information.  This all comes
 184          * directly from the publicly available @002d.ADF.
 185          * Get it from Madge or your local ADF library.
 186          */
 187
 188         /*
 189          * Base address
 190          */
 191         dev->base_addr = 0x0a20 +
 192                 ((mdev->pos[2] & MC16_POS2_ADDR2)?0x0400:0) +
 193                 ((mdev->pos[0] & MC16_POS0_ADDR1)?0x1000:0) +
 194                 ((mdev->pos[3] & MC16_POS3_ADDR3)?0x2000:0);
 195
 196         /*
 197          * Interrupt line
 198          */
 199         switch(mdev->pos[0] >> 6) { /* upper two bits */
 200                 case 0x1: dev->irq = 3; break;
 201                 case 0x2: dev->irq = 9; break; /* IRQ 2 = IRQ 9 */
 202                 case 0x3: dev->irq = 10; break;
 203                 default: dev->irq = 0; break;
 204         }
 205
 206         if (dev->irq == 0) {
 207                 printk("%s: invalid IRQ\n", dev->name);
 208                 ret = -EBUSY;
 209                 goto getout2;
 210         }
 211
 212         if (!request_region(dev->base_addr, MADGEMC_IO_EXTENT,
 213                            "madgemc")) {
 214                 printk(KERN_INFO "madgemc: unable to setup Smart MC in slot %d because of I/O base conflict at 0x%04lx\n", mdev->slot, dev->base_addr);
 215                 dev->base_addr += MADGEMC_SIF_OFFSET;
 216                 ret = -EBUSY;
 217                 goto getout2;
 218         }
 219         dev->base_addr += MADGEMC_SIF_OFFSET;
 220
 221         /*
 222          * Arbitration Level
 223          */
 224         card->arblevel = ((mdev->pos[0] >> 1) & 0x7) + 8;
 225
 226         /*
 227          * Burst mode and Fairness
 228          */
 229         card->burstmode = ((mdev->pos[2] >> 6) & 0x3);
 230         card->fairness = ((mdev->pos[2] >> 4) & 0x1);
 231
 232         /*
 233          * Ring Speed
 234          */
 235         if ((mdev->pos[1] >> 2)&0x1)
 236                 card->ringspeed = 2; /* not selected */
 237         else if ((mdev->pos[2] >> 5) & 0x1)
 238                 card->ringspeed = 1; /* 16Mb */
 239         else
 240                 card->ringspeed = 0; /* 4Mb */
 241
 242         /*
 243          * Cable type
 244          */
 245         if ((mdev->pos[1] >> 6)&0x1)
 246                 card->cabletype = 1; /* STP/DB9 */
 247         else
 248                 card->cabletype = 0; /* UTP/RJ-45 */
 249
 250
 251         /*
 252          * ROM Info. This requires us to actually twiddle
 253          * bits on the card, so we must ensure above that
 254          * the base address is free of conflict (request_region above).
 255          */
 256         madgemc_read_rom(dev, card);
 257
 258         if (card->manid != 0x4d) { /* something went wrong */
 259                 printk(KERN_INFO "%s: Madge MC ROM read failed (unknown manufacturer ID %02x)\n", dev->name, card->manid);
 260                 goto getout3;
 261         }
 262
 263         if ((card->cardtype != 0x08) && (card->cardtype != 0x0d)) {
 264                 printk(KERN_INFO "%s: Madge MC ROM read failed (unknown card ID %02x)\n", dev->name, card->cardtype);
 265                 ret = -EIO;
 266                 goto getout3;
 267         }
 268
 269         /* All cards except Rev 0 and 1 MC16's have 256kb of RAM */
 270         if ((card->cardtype == 0x08) && (card->cardrev <= 0x01))
 271                 card->ramsize = 128;
 272         else
 273                 card->ramsize = 256;
 274
 275         printk("%s: %s Rev %d at 0x%04lx IRQ %d\n",
 276                dev->name,
 277                (card->cardtype == 0x08)?MADGEMC16_CARDNAME:
 278                MADGEMC32_CARDNAME, card->cardrev,
 279                dev->base_addr, dev->irq);
 280
 281         if (card->cardtype == 0x0d)
 282                 printk("%s:     Warning: MC32 support is experimental and highly untested\n", dev->name);
 283
 284         if (card->ringspeed==2) { /* Unknown */
 285                 printk("%s:     Warning: Ring speed not set in POS -- Please run the reference disk and set it!\n", dev->name);
 286                 card->ringspeed = 1; /* default to 16mb */
 287         }
 288
 289         printk("%s:     RAM Size: %dKB\n", dev->name, card->ramsize);
 290
 291         printk("%s:     Ring Speed: %dMb/sec on %s\n", dev->name,
 292                (card->ringspeed)?16:4,
 293                card->cabletype?"STP/DB9":"UTP/RJ-45");
 294         printk("%s:     Arbitration Level: %d\n", dev->name,
 295                card->arblevel);
 296
 297         printk("%s:     Burst Mode: ", dev->name);
 298         switch(card->burstmode) {
 299                 case 0: printk("Cycle steal"); break;
 300                 case 1: printk("Limited burst"); break;
 301                 case 2: printk("Delayed release"); break;
 302                 case 3: printk("Immediate release"); break;
 303         }
 304         printk(" (%s)\n", (card->fairness)?"Unfair":"Fair");
 305
 306
 307         /*
 308          * Enable SIF before we assign the interrupt handler,
 309          * just in case we get spurious interrupts that need
 310          * handling.
 311          */
 312         outb(0, dev->base_addr + MC_CONTROL_REG0); /* sanity */
 313         madgemc_setsifsel(dev, 1);
 314         if (request_irq(dev->irq, madgemc_interrupt, IRQF_SHARED,
 315                        "madgemc", dev)) {
 316                 ret = -EBUSY;
 317                 goto getout3;
 318         }
 319
 320         madgemc_chipset_init(dev); /* enables interrupts! */
 321         madgemc_setcabletype(dev, card->cabletype);
 322
 323         /* Setup MCA structures */
 324         mca_device_set_name(mdev, (card->cardtype == 0x08)?MADGEMC16_CARDNAME:MADGEMC32_CARDNAME);
 325         mca_set_adapter_procfn(mdev->slot, madgemc_mcaproc, dev);
 326
 327         printk("%s:     Ring Station Address: ", dev->name);
 328         printk("%2.2x", dev->dev_addr[0]);
 329         for (i = 1; i < 6; i++)
 330                 printk(":%2.2x", dev->dev_addr[i]);
 331         printk("\n");
 332
 333         if (tmsdev_init(dev, device)) {
 334                 printk("%s: unable to get memory for dev->priv.\n",
 335                        dev->name);
 336                 ret = -ENOMEM;
 337                 goto getout4;
 338         }
 339         tp = netdev_priv(dev);
 340
 341         /*
 342          * The MC16 is physically a 32bit card.  However, Madge
 343          * insists on calling it 16bit, so I'll assume here that
 344          * they know what they're talking about.  Cut off DMA
 345          * at 16mb.
 346          */
 347         tp->setnselout = madgemc_setnselout_pins;
 348         tp->sifwriteb = madgemc_sifwriteb;
 349         tp->sifreadb = madgemc_sifreadb;
 350         tp->sifwritew = madgemc_sifwritew;
 351         tp->sifreadw = madgemc_sifreadw;
 352         tp->DataRate = (card->ringspeed)?SPEED_16:SPEED_4;
 353
 354         memcpy(tp->ProductID, "Madge MCA 16/4    ", PROD_ID_SIZE + 1);
 355
 356         dev->open = madgemc_open;
 357         dev->stop = madgemc_close;
 358
 359         tp->tmspriv = card;
 360         dev_set_drvdata(device, dev);
 361
 362         if (register_netdev(dev) == 0)
 363                 return 0;
 364
 365         dev_set_drvdata(device, NULL);
 366         ret = -ENOMEM;
 367 getout4:
 368         free_irq(dev->irq, dev);
 369 getout3:
 370         release_region(dev->base_addr-MADGEMC_SIF_OFFSET,
 371                        MADGEMC_IO_EXTENT);
 372 getout2:
 373         kfree(card);
 374 getout1:
 375         free_netdev(dev);
 376 getout:
 377         mca_device_set_claim(mdev, 0);
 378         return ret;
 379 }
 380
 381 /*
 382  * Handle interrupts generated by the card
 383  *
 384  * The MicroChannel Madge cards need slightly more handling
 385  * after an interrupt than other TMS380 cards do.
 386  *
 387  * First we must make sure it was this card that generated the
 388  * interrupt (since interrupt sharing is allowed).  Then,
 389  * because we're using level-triggered interrupts (as is
 390  * standard on MCA), we must toggle the interrupt line
 391  * on the card in order to claim and acknowledge the interrupt.
 392  * Once that is done, the interrupt should be handlable in
 393  * the normal tms380tr_interrupt() routine.
 394  *
 395  * There's two ways we can check to see if the interrupt is ours,
 396  * both with their own disadvantages...
 397  *
 398  * 1)   Read in the SIFSTS register from the TMS controller.  This
 399  *      is guarenteed to be accurate, however, there's a fairly
 400  *      large performance penalty for doing so: the Madge chips
 401  *      must request the register from the Eagle, the Eagle must
 402  *      read them from its internal bus, and then take the route
 403  *      back out again, for a 16bit read.
 404  *
 405  * 2)   Use the MC_CONTROL_REG0_SINTR bit from the Madge ASICs.
 406  *      The major disadvantage here is that the accuracy of the
 407  *      bit is in question.  However, it cuts out the extra read
 408  *      cycles it takes to read the Eagle's SIF, as its only an
 409  *      8bit read, and theoretically the Madge bit is directly
 410  *      connected to the interrupt latch coming out of the Eagle
 411  *      hardware (that statement is not verified).
 412  *
 413  * I can't determine which of these methods has the best win.  For now,
 414  * we make a compromise.  Use the Madge way for the first interrupt,
 415  * which should be the fast-path, and then once we hit the first
 416  * interrupt, keep on trying using the SIF method until we've
 417  * exhausted all contiguous interrupts.
 418  *
 419  */
 420 static irqreturn_t madgemc_interrupt(int irq, void *dev_id)
 421 {
 422         int pending,reg1;
 423         struct net_device *dev;
 424
 425         if (!dev_id) {
 426                 printk("madgemc_interrupt: was not passed a dev_id!\n");
 427                 return IRQ_NONE;
 428         }
 429
 430         dev = (struct net_device *)dev_id;
 431
 432         /* Make sure its really us. -- the Madge way */
 433         pending = inb(dev->base_addr + MC_CONTROL_REG0);
 434         if (!(pending & MC_CONTROL_REG0_SINTR))
 435                 return IRQ_NONE; /* not our interrupt */
 436
 437         /*
 438          * Since we're level-triggered, we may miss the rising edge
 439          * of the next interrupt while we're off handling this one,
 440          * so keep checking until the SIF verifies that it has nothing
 441          * left for us to do.
 442          */
 443         pending = STS_SYSTEM_IRQ;
 444         do {
 445                 if (pending & STS_SYSTEM_IRQ) {
 446
 447                         /* Toggle the interrupt to reset the latch on card */
 448                         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 449                         outb(reg1 ^ MC_CONTROL_REG1_SINTEN,
 450                              dev->base_addr + MC_CONTROL_REG1);
 451                         outb(reg1, dev->base_addr + MC_CONTROL_REG1);
 452
 453                         /* Continue handling as normal */
 454                         tms380tr_interrupt(irq, dev_id);
 455
 456                         pending = SIFREADW(SIFSTS); /* restart - the SIF way */
 457
 458                 } else
 459                         return IRQ_HANDLED;
 460         } while (1);
 461
 462         return IRQ_HANDLED; /* not reachable */
 463 }
 464
 465 /*
 466  * Set the card to the prefered ring speed.
 467  *
 468  * Unlike newer cards, the MC16/32 have their speed selection
 469  * circuit connected to the Madge ASICs and not to the TMS380
 470  * NSELOUT pins. Set the ASIC bits correctly here, and return
 471  * zero to leave the TMS NSELOUT bits unaffected.
 472  *
 473  */
 474 unsigned short madgemc_setnselout_pins(struct net_device *dev)
 475 {
 476         unsigned char reg1;
 477         struct net_local *tp = netdev_priv(dev);
 478
 479         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 480
 481         if(tp->DataRate == SPEED_16)
 482                 reg1 |= MC_CONTROL_REG1_SPEED_SEL; /* add for 16mb */
 483         else if (reg1 & MC_CONTROL_REG1_SPEED_SEL)
 484                 reg1 ^= MC_CONTROL_REG1_SPEED_SEL; /* remove for 4mb */
 485         outb(reg1, dev->base_addr + MC_CONTROL_REG1);
 486
 487         return 0; /* no change */
 488 }
 489
 490 /*
 491  * Set the register page.  This equates to the SRSX line
 492  * on the TMS380Cx6.
 493  *
 494  * Register selection is normally done via three contiguous
 495  * bits.  However, some boards (such as the MC16/32) use only
 496  * two bits, plus a separate bit in the glue chip.  This
 497  * sets the SRSX bit (the top bit).  See page 4-17 in the
 498  * Yellow Book for which registers are affected.
 499  *
 500  */
 501 static void madgemc_setregpage(struct net_device *dev, int page)
 502 {
 503         static int reg1;
 504
 505         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 506         if ((page == 0) && (reg1 & MC_CONTROL_REG1_SRSX)) {
 507                 outb(reg1 ^ MC_CONTROL_REG1_SRSX,
 508                      dev->base_addr + MC_CONTROL_REG1);
 509         }
 510         else if (page == 1) {
 511                 outb(reg1 | MC_CONTROL_REG1_SRSX,
 512                      dev->base_addr + MC_CONTROL_REG1);
 513         }
 514         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 515
 516         return;
 517 }
 518
 519 /*
 520  * The SIF registers are not mapped into register space by default
 521  * Set this to 1 to map them, 0 to map the BIA ROM.
 522  *
 523  */
 524 static void madgemc_setsifsel(struct net_device *dev, int val)
 525 {
 526         unsigned int reg0;
 527
 528         reg0 = inb(dev->base_addr + MC_CONTROL_REG0);
 529         if ((val == 0) && (reg0 & MC_CONTROL_REG0_SIFSEL)) {
 530                 outb(reg0 ^ MC_CONTROL_REG0_SIFSEL,
 531                      dev->base_addr + MC_CONTROL_REG0);
 532         } else if (val == 1) {
 533                 outb(reg0 | MC_CONTROL_REG0_SIFSEL,
 534                      dev->base_addr + MC_CONTROL_REG0);
 535         }
 536         reg0 = inb(dev->base_addr + MC_CONTROL_REG0);
 537
 538         return;
 539 }
 540
 541 /*
 542  * Enable SIF interrupts
 543  *
 544  * This does not enable interrupts in the SIF, but rather
 545  * enables SIF interrupts to be passed onto the host.
 546  *
 547  */
 548 static void madgemc_setint(struct net_device *dev, int val)
 549 {
 550         unsigned int reg1;
 551
 552         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 553         if ((val == 0) && (reg1 & MC_CONTROL_REG1_SINTEN)) {
 554                 outb(reg1 ^ MC_CONTROL_REG1_SINTEN,
 555                      dev->base_addr + MC_CONTROL_REG1);
 556         } else if (val == 1) {
 557                 outb(reg1 | MC_CONTROL_REG1_SINTEN,
 558                      dev->base_addr + MC_CONTROL_REG1);
 559         }
 560
 561         return;
 562 }
 563
 564 /*
 565  * Cable type is set via control register 7. Bit zero high
 566  * for UTP, low for STP.
 567  */
 568 static void madgemc_setcabletype(struct net_device *dev, int type)
 569 {
 570         outb((type==0)?MC_CONTROL_REG7_CABLEUTP:MC_CONTROL_REG7_CABLESTP,
 571              dev->base_addr + MC_CONTROL_REG7);
 572 }
 573
 574 /*
 575  * Enable the functions of the Madge chipset needed for
 576  * full working order.
 577  */
 578 static int madgemc_chipset_init(struct net_device *dev)
 579 {
 580         outb(0, dev->base_addr + MC_CONTROL_REG1); /* pull SRESET low */
 581         tms380tr_wait(100); /* wait for card to reset */
 582
 583         /* bring back into normal operating mode */
 584         outb(MC_CONTROL_REG1_NSRESET, dev->base_addr + MC_CONTROL_REG1);
 585
 586         /* map SIF registers */
 587         madgemc_setsifsel(dev, 1);
 588
 589         /* enable SIF interrupts */
 590         madgemc_setint(dev, 1);
 591
 592         return 0;
 593 }
 594
 595 /*
 596  * Disable the board, and put back into power-up state.
 597  */
 598 static void madgemc_chipset_close(struct net_device *dev)
 599 {
 600         /* disable interrupts */
 601         madgemc_setint(dev, 0);
 602         /* unmap SIF registers */
 603         madgemc_setsifsel(dev, 0);
 604
 605         return;
 606 }
 607
 608 /*
 609  * Read the card type (MC16 or MC32) from the card.
 610  *
 611  * The configuration registers are stored in two separate
 612  * pages.  Pages are flipped by clearing bit 3 of CONTROL_REG0 (PAGE)
 613  * for page zero, or setting bit 3 for page one.
 614  *
 615  * Page zero contains the following data:
 616  *      Byte 0: Manufacturer ID (0x4D -- ASCII "M")
 617  *      Byte 1: Card type:
 618  *                      0x08 for MC16
 619  *                      0x0D for MC32
 620  *      Byte 2: Card revision
 621  *      Byte 3: Mirror of POS config register 0
 622  *      Byte 4: Mirror of POS 1
 623  *      Byte 5: Mirror of POS 2
 624  *
 625  * Page one contains the following data:
 626  *      Byte 0: Unused
 627  *      Byte 1-6: BIA, MSB to LSB.
 628  *
 629  * Note that to read the BIA, we must unmap the SIF registers
 630  * by clearing bit 2 of CONTROL_REG0 (SIFSEL), as the data
 631  * will reside in the same logical location.  For this reason,
 632  * _never_ read the BIA while the Eagle processor is running!
 633  * The SIF will be completely inaccessible until the BIA operation
 634  * is complete.
 635  *
 636  */
 637 static void madgemc_read_rom(struct net_device *dev, struct card_info *card)
 638 {
 639         unsigned long ioaddr;
 640         unsigned char reg0, reg1, tmpreg0, i;
 641
 642         ioaddr = dev->base_addr;
 643
 644         reg0 = inb(ioaddr + MC_CONTROL_REG0);
 645         reg1 = inb(ioaddr + MC_CONTROL_REG1);
 646
 647         /* Switch to page zero and unmap SIF */
 648         tmpreg0 = reg0 & ~(MC_CONTROL_REG0_PAGE + MC_CONTROL_REG0_SIFSEL);
 649         outb(tmpreg0, ioaddr + MC_CONTROL_REG0);
 650
 651         card->manid = inb(ioaddr + MC_ROM_MANUFACTURERID);
 652         card->cardtype = inb(ioaddr + MC_ROM_ADAPTERID);
 653         card->cardrev = inb(ioaddr + MC_ROM_REVISION);
 654
 655         /* Switch to rom page one */
 656         outb(tmpreg0 | MC_CONTROL_REG0_PAGE, ioaddr + MC_CONTROL_REG0);
 657
 658         /* Read BIA */
 659         dev->addr_len = 6;
 660         for (i = 0; i < 6; i++)
 661                 dev->dev_addr[i] = inb(ioaddr + MC_ROM_BIA_START + i);
 662
 663         /* Restore original register values */
 664         outb(reg0, ioaddr + MC_CONTROL_REG0);
 665         outb(reg1, ioaddr + MC_CONTROL_REG1);
 666
 667         return;
 668 }
 669
 670 static int madgemc_open(struct net_device *dev)
 671 {
 672         /*
 673          * Go ahead and reinitialize the chipset again, just to
 674          * make sure we didn't get left in a bad state.
 675          */
 676         madgemc_chipset_init(dev);
 677         tms380tr_open(dev);
 678         return 0;
 679 }
 680
 681 static int madgemc_close(struct net_device *dev)
 682 {
 683         tms380tr_close(dev);
 684         madgemc_chipset_close(dev);
 685         return 0;
 686 }
 687
 688 /*
 689  * Give some details available from /proc/mca/slotX
 690  */
 691 static int madgemc_mcaproc(char *buf, int slot, void *d)
 692 {
 693         struct net_device *dev = (struct net_device *)d;
 694         struct net_local *tp = dev->priv;
 695         struct card_info *curcard = tp->tmspriv;
 696         int len = 0;
 697
 698         len += sprintf(buf+len, "-------\n");
 699         if (curcard) {
 700                 struct net_local *tp = netdev_priv(dev);
 701                 int i;
 702
 703                 len += sprintf(buf+len, "Card Revision: %d\n", curcard->cardrev);
 704                 len += sprintf(buf+len, "RAM Size: %dkb\n", curcard->ramsize);
 705                 len += sprintf(buf+len, "Cable type: %s\n", (curcard->cabletype)?"STP/DB9":"UTP/RJ-45");
 706                 len += sprintf(buf+len, "Configured ring speed: %dMb/sec\n", (curcard->ringspeed)?16:4);
 707                 len += sprintf(buf+len, "Running ring speed: %dMb/sec\n", (tp->DataRate==SPEED_16)?16:4);
 708                 len += sprintf(buf+len, "Device: %s\n", dev->name);
 709                 len += sprintf(buf+len, "IO Port: 0x%04lx\n", dev->base_addr);
 710                 len += sprintf(buf+len, "IRQ: %d\n", dev->irq);
 711                 len += sprintf(buf+len, "Arbitration Level: %d\n", curcard->arblevel);
 712                 len += sprintf(buf+len, "Burst Mode: ");
 713                 switch(curcard->burstmode) {
 714                 case 0: len += sprintf(buf+len, "Cycle steal"); break;
 715                 case 1: len += sprintf(buf+len, "Limited burst"); break;
 716                 case 2: len += sprintf(buf+len, "Delayed release"); break;
 717                 case 3: len += sprintf(buf+len, "Immediate release"); break;
 718                 }
 719                 len += sprintf(buf+len, " (%s)\n", (curcard->fairness)?"Unfair":"Fair");
 720
 721                 len += sprintf(buf+len, "Ring Station Address: ");
 722                 len += sprintf(buf+len, "%2.2x", dev->dev_addr[0]);
 723                 for (i = 1; i < 6; i++)
 724                         len += sprintf(buf+len, " %2.2x", dev->dev_addr[i]);
 725                 len += sprintf(buf+len, "\n");
 726         } else
 727                 len += sprintf(buf+len, "Card not configured\n");
 728
 729         return len;
 730 }
 731
 732 static int __devexit madgemc_remove(struct device *device)
 733 {
 734         struct net_device *dev = dev_get_drvdata(device);
 735         struct net_local *tp;
 736         struct card_info *card;
 737
 738         BUG_ON(!dev);
 739
 740         tp = dev->priv;
 741         card = tp->tmspriv;
 742         kfree(card);
 743         tp->tmspriv = NULL;
 744
 745         unregister_netdev(dev);
 746         release_region(dev->base_addr-MADGEMC_SIF_OFFSET, MADGEMC_IO_EXTENT);
 747         free_irq(dev->irq, dev);
 748         tmsdev_term(dev);
 749         free_netdev(dev);
 750         dev_set_drvdata(device, NULL);
 751
 752         return 0;
 753 }
 754
 755 static short madgemc_adapter_ids[] __initdata = {
 756         0x002d,
 757         0x0000
 758 };
 759
 760 static struct mca_driver madgemc_driver = {
 761         .id_table = madgemc_adapter_ids,
 762         .driver = {
 763                 .name = "madgemc",
 764                 .bus = &mca_bus_type,
 765                 .probe = madgemc_probe,
 766                 .remove = __devexit_p(madgemc_remove),
 767         },
 768 };
 769
 770 static int __init madgemc_init (void)
 771 {
 772         return mca_register_driver (&madgemc_driver);
 773 }
 774
 775 static void __exit madgemc_exit (void)
 776 {
 777         mca_unregister_driver (&madgemc_driver);
 778 }
 779
 780 module_init(madgemc_init);
 781 module_exit(madgemc_exit);
 782
 783 MODULE_LICENSE("GPL");
 784