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/init.h>
  27 #include <linux/netdevice.h>
  28 #include <linux/trdevice.h>
  29
  30 #include <asm/system.h>
  31 #include <asm/io.h>
  32 #include <asm/irq.h>
  33
  34 #include "tms380tr.h"
  35 #include "madgemc.h"            /* Madge-specific constants */
  36
  37 #define MADGEMC_IO_EXTENT 32
  38 #define MADGEMC_SIF_OFFSET 0x08
  39
  40 struct card_info {
  41         /*
  42          * These are read from the BIA ROM.
  43          */
  44         unsigned int manid;
  45         unsigned int cardtype;
  46         unsigned int cardrev;
  47         unsigned int ramsize;
  48
  49         /*
  50          * These are read from the MCA POS registers.
  51          */
  52         unsigned int burstmode:2;
  53         unsigned int fairness:1; /* 0 = Fair, 1 = Unfair */
  54         unsigned int arblevel:4;
  55         unsigned int ringspeed:2; /* 0 = 4mb, 1 = 16, 2 = Auto/none */
  56         unsigned int cabletype:1; /* 0 = RJ45, 1 = DB9 */
  57 };
  58
  59 static int madgemc_open(struct net_device *dev);
  60 static int madgemc_close(struct net_device *dev);
  61 static int madgemc_chipset_init(struct net_device *dev);
  62 static void madgemc_read_rom(struct net_device *dev, struct card_info *card);
  63 static unsigned short madgemc_setnselout_pins(struct net_device *dev);
  64 static void madgemc_setcabletype(struct net_device *dev, int type);
  65
  66 static int madgemc_mcaproc(char *buf, int slot, void *d);
  67
  68 static void madgemc_setregpage(struct net_device *dev, int page);
  69 static void madgemc_setsifsel(struct net_device *dev, int val);
  70 static void madgemc_setint(struct net_device *dev, int val);
  71
  72 static irqreturn_t madgemc_interrupt(int irq, void *dev_id);
  73
  74 /*
  75  * These work around paging, however they don't guarentee you're on the
  76  * right page.
  77  */
  78 #define SIFREADB(reg) (inb(dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  79 #define SIFWRITEB(val, reg) (outb(val, dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  80 #define SIFREADW(reg) (inw(dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  81 #define SIFWRITEW(val, reg) (outw(val, dev->base_addr + ((reg<0x8)?reg:reg-0x8)))
  82
  83 /*
  84  * Read a byte-length value from the register.
  85  */
  86 static unsigned short madgemc_sifreadb(struct net_device *dev, unsigned short reg)
  87 {
  88         unsigned short ret;
  89         if (reg<0x8)
  90                 ret = SIFREADB(reg);
  91         else {
  92                 madgemc_setregpage(dev, 1);
  93                 ret = SIFREADB(reg);
  94                 madgemc_setregpage(dev, 0);
  95         }
  96         return ret;
  97 }
  98
  99 /*
 100  * Write a byte-length value to a register.
 101  */
 102 static void madgemc_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
 103 {
 104         if (reg<0x8)
 105                 SIFWRITEB(val, reg);
 106         else {
 107                 madgemc_setregpage(dev, 1);
 108                 SIFWRITEB(val, reg);
 109                 madgemc_setregpage(dev, 0);
 110         }
 111         return;
 112 }
 113
 114 /*
 115  * Read a word-length value from a register
 116  */
 117 static unsigned short madgemc_sifreadw(struct net_device *dev, unsigned short reg)
 118 {
 119         unsigned short ret;
 120         if (reg<0x8)
 121                 ret = SIFREADW(reg);
 122         else {
 123                 madgemc_setregpage(dev, 1);
 124                 ret = SIFREADW(reg);
 125                 madgemc_setregpage(dev, 0);
 126         }
 127         return ret;
 128 }
 129
 130 /*
 131  * Write a word-length value to a register.
 132  */
 133 static void madgemc_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
 134 {
 135         if (reg<0x8)
 136                 SIFWRITEW(val, reg);
 137         else {
 138                 madgemc_setregpage(dev, 1);
 139                 SIFWRITEW(val, reg);
 140                 madgemc_setregpage(dev, 0);
 141         }
 142         return;
 143 }
 144
 145
 146
 147 static int __devinit madgemc_probe(struct device *device)
 148 {
 149         static int versionprinted;
 150         struct net_device *dev;
 151         struct net_local *tp;
 152         struct card_info *card;
 153         struct mca_device *mdev = to_mca_device(device);
 154         int ret = 0;
 155         DECLARE_MAC_BUF(mac);
 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         dev->dma = 0;
 173
 174         card = kmalloc(sizeof(struct card_info), GFP_KERNEL);
 175         if (card==NULL) {
 176                 printk("madgemc: unable to allocate card struct\n");
 177                 ret = -ENOMEM;
 178                 goto getout1;
 179         }
 180
 181         /*
 182          * Parse configuration information.  This all comes
 183          * directly from the publicly available @002d.ADF.
 184          * Get it from Madge or your local ADF library.
 185          */
 186
 187         /*
 188          * Base address
 189          */
 190         dev->base_addr = 0x0a20 +
 191                 ((mdev->pos[2] & MC16_POS2_ADDR2)?0x0400:0) +
 192                 ((mdev->pos[0] & MC16_POS0_ADDR1)?0x1000:0) +
 193                 ((mdev->pos[3] & MC16_POS3_ADDR3)?0x2000:0);
 194
 195         /*
 196          * Interrupt line
 197          */
 198         switch(mdev->pos[0] >> 6) { /* upper two bits */
 199                 case 0x1: dev->irq = 3; break;
 200                 case 0x2: dev->irq = 9; break; /* IRQ 2 = IRQ 9 */
 201                 case 0x3: dev->irq = 10; break;
 202                 default: dev->irq = 0; break;
 203         }
 204
 205         if (dev->irq == 0) {
 206                 printk("%s: invalid IRQ\n", dev->name);
 207                 ret = -EBUSY;
 208                 goto getout2;
 209         }
 210
 211         if (!request_region(dev->base_addr, MADGEMC_IO_EXTENT,
 212                            "madgemc")) {
 213                 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);
 214                 dev->base_addr += MADGEMC_SIF_OFFSET;
 215                 ret = -EBUSY;
 216                 goto getout2;
 217         }
 218         dev->base_addr += MADGEMC_SIF_OFFSET;
 219
 220         /*
 221          * Arbitration Level
 222          */
 223         card->arblevel = ((mdev->pos[0] >> 1) & 0x7) + 8;
 224
 225         /*
 226          * Burst mode and Fairness
 227          */
 228         card->burstmode = ((mdev->pos[2] >> 6) & 0x3);
 229         card->fairness = ((mdev->pos[2] >> 4) & 0x1);
 230
 231         /*
 232          * Ring Speed
 233          */
 234         if ((mdev->pos[1] >> 2)&0x1)
 235                 card->ringspeed = 2; /* not selected */
 236         else if ((mdev->pos[2] >> 5) & 0x1)
 237                 card->ringspeed = 1; /* 16Mb */
 238         else
 239                 card->ringspeed = 0; /* 4Mb */
 240
 241         /*
 242          * Cable type
 243          */
 244         if ((mdev->pos[1] >> 6)&0x1)
 245                 card->cabletype = 1; /* STP/DB9 */
 246         else
 247                 card->cabletype = 0; /* UTP/RJ-45 */
 248
 249
 250         /*
 251          * ROM Info. This requires us to actually twiddle
 252          * bits on the card, so we must ensure above that
 253          * the base address is free of conflict (request_region above).
 254          */
 255         madgemc_read_rom(dev, card);
 256
 257         if (card->manid != 0x4d) { /* something went wrong */
 258                 printk(KERN_INFO "%s: Madge MC ROM read failed (unknown manufacturer ID %02x)\n", dev->name, card->manid);
 259                 goto getout3;
 260         }
 261
 262         if ((card->cardtype != 0x08) && (card->cardtype != 0x0d)) {
 263                 printk(KERN_INFO "%s: Madge MC ROM read failed (unknown card ID %02x)\n", dev->name, card->cardtype);
 264                 ret = -EIO;
 265                 goto getout3;
 266         }
 267
 268         /* All cards except Rev 0 and 1 MC16's have 256kb of RAM */
 269         if ((card->cardtype == 0x08) && (card->cardrev <= 0x01))
 270                 card->ramsize = 128;
 271         else
 272                 card->ramsize = 256;
 273
 274         printk("%s: %s Rev %d at 0x%04lx IRQ %d\n",
 275                dev->name,
 276                (card->cardtype == 0x08)?MADGEMC16_CARDNAME:
 277                MADGEMC32_CARDNAME, card->cardrev,
 278                dev->base_addr, dev->irq);
 279
 280         if (card->cardtype == 0x0d)
 281                 printk("%s:     Warning: MC32 support is experimental and highly untested\n", dev->name);
 282
 283         if (card->ringspeed==2) { /* Unknown */
 284                 printk("%s:     Warning: Ring speed not set in POS -- Please run the reference disk and set it!\n", dev->name);
 285                 card->ringspeed = 1; /* default to 16mb */
 286         }
 287
 288         printk("%s:     RAM Size: %dKB\n", dev->name, card->ramsize);
 289
 290         printk("%s:     Ring Speed: %dMb/sec on %s\n", dev->name,
 291                (card->ringspeed)?16:4,
 292                card->cabletype?"STP/DB9":"UTP/RJ-45");
 293         printk("%s:     Arbitration Level: %d\n", dev->name,
 294                card->arblevel);
 295
 296         printk("%s:     Burst Mode: ", dev->name);
 297         switch(card->burstmode) {
 298                 case 0: printk("Cycle steal"); break;
 299                 case 1: printk("Limited burst"); break;
 300                 case 2: printk("Delayed release"); break;
 301                 case 3: printk("Immediate release"); break;
 302         }
 303         printk(" (%s)\n", (card->fairness)?"Unfair":"Fair");
 304
 305
 306         /*
 307          * Enable SIF before we assign the interrupt handler,
 308          * just in case we get spurious interrupts that need
 309          * handling.
 310          */
 311         outb(0, dev->base_addr + MC_CONTROL_REG0); /* sanity */
 312         madgemc_setsifsel(dev, 1);
 313         if (request_irq(dev->irq, madgemc_interrupt, IRQF_SHARED,
 314                        "madgemc", dev)) {
 315                 ret = -EBUSY;
 316                 goto getout3;
 317         }
 318
 319         madgemc_chipset_init(dev); /* enables interrupts! */
 320         madgemc_setcabletype(dev, card->cabletype);
 321
 322         /* Setup MCA structures */
 323         mca_device_set_name(mdev, (card->cardtype == 0x08)?MADGEMC16_CARDNAME:MADGEMC32_CARDNAME);
 324         mca_set_adapter_procfn(mdev->slot, madgemc_mcaproc, dev);
 325
 326         printk("%s:     Ring Station Address: %s\n",
 327                dev->name, print_mac(mac, dev->dev_addr));
 328
 329         if (tmsdev_init(dev, device)) {
 330                 printk("%s: unable to get memory for dev->priv.\n",
 331                        dev->name);
 332                 ret = -ENOMEM;
 333                 goto getout4;
 334         }
 335         tp = netdev_priv(dev);
 336
 337         /*
 338          * The MC16 is physically a 32bit card.  However, Madge
 339          * insists on calling it 16bit, so I'll assume here that
 340          * they know what they're talking about.  Cut off DMA
 341          * at 16mb.
 342          */
 343         tp->setnselout = madgemc_setnselout_pins;
 344         tp->sifwriteb = madgemc_sifwriteb;
 345         tp->sifreadb = madgemc_sifreadb;
 346         tp->sifwritew = madgemc_sifwritew;
 347         tp->sifreadw = madgemc_sifreadw;
 348         tp->DataRate = (card->ringspeed)?SPEED_16:SPEED_4;
 349
 350         memcpy(tp->ProductID, "Madge MCA 16/4    ", PROD_ID_SIZE + 1);
 351
 352         dev->open = madgemc_open;
 353         dev->stop = madgemc_close;
 354
 355         tp->tmspriv = card;
 356         dev_set_drvdata(device, dev);
 357
 358         if (register_netdev(dev) == 0)
 359                 return 0;
 360
 361         dev_set_drvdata(device, NULL);
 362         ret = -ENOMEM;
 363 getout4:
 364         free_irq(dev->irq, dev);
 365 getout3:
 366         release_region(dev->base_addr-MADGEMC_SIF_OFFSET,
 367                        MADGEMC_IO_EXTENT);
 368 getout2:
 369         kfree(card);
 370 getout1:
 371         free_netdev(dev);
 372 getout:
 373         mca_device_set_claim(mdev, 0);
 374         return ret;
 375 }
 376
 377 /*
 378  * Handle interrupts generated by the card
 379  *
 380  * The MicroChannel Madge cards need slightly more handling
 381  * after an interrupt than other TMS380 cards do.
 382  *
 383  * First we must make sure it was this card that generated the
 384  * interrupt (since interrupt sharing is allowed).  Then,
 385  * because we're using level-triggered interrupts (as is
 386  * standard on MCA), we must toggle the interrupt line
 387  * on the card in order to claim and acknowledge the interrupt.
 388  * Once that is done, the interrupt should be handlable in
 389  * the normal tms380tr_interrupt() routine.
 390  *
 391  * There's two ways we can check to see if the interrupt is ours,
 392  * both with their own disadvantages...
 393  *
 394  * 1)   Read in the SIFSTS register from the TMS controller.  This
 395  *      is guarenteed to be accurate, however, there's a fairly
 396  *      large performance penalty for doing so: the Madge chips
 397  *      must request the register from the Eagle, the Eagle must
 398  *      read them from its internal bus, and then take the route
 399  *      back out again, for a 16bit read.
 400  *
 401  * 2)   Use the MC_CONTROL_REG0_SINTR bit from the Madge ASICs.
 402  *      The major disadvantage here is that the accuracy of the
 403  *      bit is in question.  However, it cuts out the extra read
 404  *      cycles it takes to read the Eagle's SIF, as its only an
 405  *      8bit read, and theoretically the Madge bit is directly
 406  *      connected to the interrupt latch coming out of the Eagle
 407  *      hardware (that statement is not verified).
 408  *
 409  * I can't determine which of these methods has the best win.  For now,
 410  * we make a compromise.  Use the Madge way for the first interrupt,
 411  * which should be the fast-path, and then once we hit the first
 412  * interrupt, keep on trying using the SIF method until we've
 413  * exhausted all contiguous interrupts.
 414  *
 415  */
 416 static irqreturn_t madgemc_interrupt(int irq, void *dev_id)
 417 {
 418         int pending,reg1;
 419         struct net_device *dev;
 420
 421         if (!dev_id) {
 422                 printk("madgemc_interrupt: was not passed a dev_id!\n");
 423                 return IRQ_NONE;
 424         }
 425
 426         dev = (struct net_device *)dev_id;
 427
 428         /* Make sure its really us. -- the Madge way */
 429         pending = inb(dev->base_addr + MC_CONTROL_REG0);
 430         if (!(pending & MC_CONTROL_REG0_SINTR))
 431                 return IRQ_NONE; /* not our interrupt */
 432
 433         /*
 434          * Since we're level-triggered, we may miss the rising edge
 435          * of the next interrupt while we're off handling this one,
 436          * so keep checking until the SIF verifies that it has nothing
 437          * left for us to do.
 438          */
 439         pending = STS_SYSTEM_IRQ;
 440         do {
 441                 if (pending & STS_SYSTEM_IRQ) {
 442
 443                         /* Toggle the interrupt to reset the latch on card */
 444                         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 445                         outb(reg1 ^ MC_CONTROL_REG1_SINTEN,
 446                              dev->base_addr + MC_CONTROL_REG1);
 447                         outb(reg1, dev->base_addr + MC_CONTROL_REG1);
 448
 449                         /* Continue handling as normal */
 450                         tms380tr_interrupt(irq, dev_id);
 451
 452                         pending = SIFREADW(SIFSTS); /* restart - the SIF way */
 453
 454                 } else
 455                         return IRQ_HANDLED;
 456         } while (1);
 457
 458         return IRQ_HANDLED; /* not reachable */
 459 }
 460
 461 /*
 462  * Set the card to the prefered ring speed.
 463  *
 464  * Unlike newer cards, the MC16/32 have their speed selection
 465  * circuit connected to the Madge ASICs and not to the TMS380
 466  * NSELOUT pins. Set the ASIC bits correctly here, and return
 467  * zero to leave the TMS NSELOUT bits unaffected.
 468  *
 469  */
 470 unsigned short madgemc_setnselout_pins(struct net_device *dev)
 471 {
 472         unsigned char reg1;
 473         struct net_local *tp = netdev_priv(dev);
 474
 475         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 476
 477         if(tp->DataRate == SPEED_16)
 478                 reg1 |= MC_CONTROL_REG1_SPEED_SEL; /* add for 16mb */
 479         else if (reg1 & MC_CONTROL_REG1_SPEED_SEL)
 480                 reg1 ^= MC_CONTROL_REG1_SPEED_SEL; /* remove for 4mb */
 481         outb(reg1, dev->base_addr + MC_CONTROL_REG1);
 482
 483         return 0; /* no change */
 484 }
 485
 486 /*
 487  * Set the register page.  This equates to the SRSX line
 488  * on the TMS380Cx6.
 489  *
 490  * Register selection is normally done via three contiguous
 491  * bits.  However, some boards (such as the MC16/32) use only
 492  * two bits, plus a separate bit in the glue chip.  This
 493  * sets the SRSX bit (the top bit).  See page 4-17 in the
 494  * Yellow Book for which registers are affected.
 495  *
 496  */
 497 static void madgemc_setregpage(struct net_device *dev, int page)
 498 {
 499         static int reg1;
 500
 501         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 502         if ((page == 0) && (reg1 & MC_CONTROL_REG1_SRSX)) {
 503                 outb(reg1 ^ MC_CONTROL_REG1_SRSX,
 504                      dev->base_addr + MC_CONTROL_REG1);
 505         }
 506         else if (page == 1) {
 507                 outb(reg1 | MC_CONTROL_REG1_SRSX,
 508                      dev->base_addr + MC_CONTROL_REG1);
 509         }
 510         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 511
 512         return;
 513 }
 514
 515 /*
 516  * The SIF registers are not mapped into register space by default
 517  * Set this to 1 to map them, 0 to map the BIA ROM.
 518  *
 519  */
 520 static void madgemc_setsifsel(struct net_device *dev, int val)
 521 {
 522         unsigned int reg0;
 523
 524         reg0 = inb(dev->base_addr + MC_CONTROL_REG0);
 525         if ((val == 0) && (reg0 & MC_CONTROL_REG0_SIFSEL)) {
 526                 outb(reg0 ^ MC_CONTROL_REG0_SIFSEL,
 527                      dev->base_addr + MC_CONTROL_REG0);
 528         } else if (val == 1) {
 529                 outb(reg0 | MC_CONTROL_REG0_SIFSEL,
 530                      dev->base_addr + MC_CONTROL_REG0);
 531         }
 532         reg0 = inb(dev->base_addr + MC_CONTROL_REG0);
 533
 534         return;
 535 }
 536
 537 /*
 538  * Enable SIF interrupts
 539  *
 540  * This does not enable interrupts in the SIF, but rather
 541  * enables SIF interrupts to be passed onto the host.
 542  *
 543  */
 544 static void madgemc_setint(struct net_device *dev, int val)
 545 {
 546         unsigned int reg1;
 547
 548         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 549         if ((val == 0) && (reg1 & MC_CONTROL_REG1_SINTEN)) {
 550                 outb(reg1 ^ MC_CONTROL_REG1_SINTEN,
 551                      dev->base_addr + MC_CONTROL_REG1);
 552         } else if (val == 1) {
 553                 outb(reg1 | MC_CONTROL_REG1_SINTEN,
 554                      dev->base_addr + MC_CONTROL_REG1);
 555         }
 556
 557         return;
 558 }
 559
 560 /*
 561  * Cable type is set via control register 7. Bit zero high
 562  * for UTP, low for STP.
 563  */
 564 static void madgemc_setcabletype(struct net_device *dev, int type)
 565 {
 566         outb((type==0)?MC_CONTROL_REG7_CABLEUTP:MC_CONTROL_REG7_CABLESTP,
 567              dev->base_addr + MC_CONTROL_REG7);
 568 }
 569
 570 /*
 571  * Enable the functions of the Madge chipset needed for
 572  * full working order.
 573  */
 574 static int madgemc_chipset_init(struct net_device *dev)
 575 {
 576         outb(0, dev->base_addr + MC_CONTROL_REG1); /* pull SRESET low */
 577         tms380tr_wait(100); /* wait for card to reset */
 578
 579         /* bring back into normal operating mode */
 580         outb(MC_CONTROL_REG1_NSRESET, dev->base_addr + MC_CONTROL_REG1);
 581
 582         /* map SIF registers */
 583         madgemc_setsifsel(dev, 1);
 584
 585         /* enable SIF interrupts */
 586         madgemc_setint(dev, 1);
 587
 588         return 0;
 589 }
 590
 591 /*
 592  * Disable the board, and put back into power-up state.
 593  */
 594 static void madgemc_chipset_close(struct net_device *dev)
 595 {
 596         /* disable interrupts */
 597         madgemc_setint(dev, 0);
 598         /* unmap SIF registers */
 599         madgemc_setsifsel(dev, 0);
 600
 601         return;
 602 }
 603
 604 /*
 605  * Read the card type (MC16 or MC32) from the card.
 606  *
 607  * The configuration registers are stored in two separate
 608  * pages.  Pages are flipped by clearing bit 3 of CONTROL_REG0 (PAGE)
 609  * for page zero, or setting bit 3 for page one.
 610  *
 611  * Page zero contains the following data:
 612  *      Byte 0: Manufacturer ID (0x4D -- ASCII "M")
 613  *      Byte 1: Card type:
 614  *                      0x08 for MC16
 615  *                      0x0D for MC32
 616  *      Byte 2: Card revision
 617  *      Byte 3: Mirror of POS config register 0
 618  *      Byte 4: Mirror of POS 1
 619  *      Byte 5: Mirror of POS 2
 620  *
 621  * Page one contains the following data:
 622  *      Byte 0: Unused
 623  *      Byte 1-6: BIA, MSB to LSB.
 624  *
 625  * Note that to read the BIA, we must unmap the SIF registers
 626  * by clearing bit 2 of CONTROL_REG0 (SIFSEL), as the data
 627  * will reside in the same logical location.  For this reason,
 628  * _never_ read the BIA while the Eagle processor is running!
 629  * The SIF will be completely inaccessible until the BIA operation
 630  * is complete.
 631  *
 632  */
 633 static void madgemc_read_rom(struct net_device *dev, struct card_info *card)
 634 {
 635         unsigned long ioaddr;
 636         unsigned char reg0, reg1, tmpreg0, i;
 637
 638         ioaddr = dev->base_addr;
 639
 640         reg0 = inb(ioaddr + MC_CONTROL_REG0);
 641         reg1 = inb(ioaddr + MC_CONTROL_REG1);
 642
 643         /* Switch to page zero and unmap SIF */
 644         tmpreg0 = reg0 & ~(MC_CONTROL_REG0_PAGE + MC_CONTROL_REG0_SIFSEL);
 645         outb(tmpreg0, ioaddr + MC_CONTROL_REG0);
 646
 647         card->manid = inb(ioaddr + MC_ROM_MANUFACTURERID);
 648         card->cardtype = inb(ioaddr + MC_ROM_ADAPTERID);
 649         card->cardrev = inb(ioaddr + MC_ROM_REVISION);
 650
 651         /* Switch to rom page one */
 652         outb(tmpreg0 | MC_CONTROL_REG0_PAGE, ioaddr + MC_CONTROL_REG0);
 653
 654         /* Read BIA */
 655         dev->addr_len = 6;
 656         for (i = 0; i < 6; i++)
 657                 dev->dev_addr[i] = inb(ioaddr + MC_ROM_BIA_START + i);
 658
 659         /* Restore original register values */
 660         outb(reg0, ioaddr + MC_CONTROL_REG0);
 661         outb(reg1, ioaddr + MC_CONTROL_REG1);
 662
 663         return;
 664 }
 665
 666 static int madgemc_open(struct net_device *dev)
 667 {
 668         /*
 669          * Go ahead and reinitialize the chipset again, just to
 670          * make sure we didn't get left in a bad state.
 671          */
 672         madgemc_chipset_init(dev);
 673         tms380tr_open(dev);
 674         return 0;
 675 }
 676
 677 static int madgemc_close(struct net_device *dev)
 678 {
 679         tms380tr_close(dev);
 680         madgemc_chipset_close(dev);
 681         return 0;
 682 }
 683
 684 /*
 685  * Give some details available from /proc/mca/slotX
 686  */
 687 static int madgemc_mcaproc(char *buf, int slot, void *d)
 688 {
 689         struct net_device *dev = (struct net_device *)d;
 690         struct net_local *tp = netdev_priv(dev);
 691         struct card_info *curcard = tp->tmspriv;
 692         int len = 0;
 693         DECLARE_MAC_BUF(mac);
 694
 695         len += sprintf(buf+len, "-------\n");
 696         if (curcard) {
 697                 struct net_local *tp = netdev_priv(dev);
 698
 699                 len += sprintf(buf+len, "Card Revision: %d\n", curcard->cardrev);
 700                 len += sprintf(buf+len, "RAM Size: %dkb\n", curcard->ramsize);
 701                 len += sprintf(buf+len, "Cable type: %s\n", (curcard->cabletype)?"STP/DB9":"UTP/RJ-45");
 702                 len += sprintf(buf+len, "Configured ring speed: %dMb/sec\n", (curcard->ringspeed)?16:4);
 703                 len += sprintf(buf+len, "Running ring speed: %dMb/sec\n", (tp->DataRate==SPEED_16)?16:4);
 704                 len += sprintf(buf+len, "Device: %s\n", dev->name);
 705                 len += sprintf(buf+len, "IO Port: 0x%04lx\n", dev->base_addr);
 706                 len += sprintf(buf+len, "IRQ: %d\n", dev->irq);
 707                 len += sprintf(buf+len, "Arbitration Level: %d\n", curcard->arblevel);
 708                 len += sprintf(buf+len, "Burst Mode: ");
 709                 switch(curcard->burstmode) {
 710                 case 0: len += sprintf(buf+len, "Cycle steal"); break;
 711                 case 1: len += sprintf(buf+len, "Limited burst"); break;
 712                 case 2: len += sprintf(buf+len, "Delayed release"); break;
 713                 case 3: len += sprintf(buf+len, "Immediate release"); break;
 714                 }
 715                 len += sprintf(buf+len, " (%s)\n", (curcard->fairness)?"Unfair":"Fair");
 716
 717                 len += sprintf(buf+len, "Ring Station Address: %s\n",
 718                                print_mac(mac, dev->dev_addr));
 719         } else
 720                 len += sprintf(buf+len, "Card not configured\n");
 721
 722         return len;
 723 }
 724
 725 static int __devexit madgemc_remove(struct device *device)
 726 {
 727         struct net_device *dev = dev_get_drvdata(device);
 728         struct net_local *tp;
 729         struct card_info *card;
 730
 731         BUG_ON(!dev);
 732
 733         tp = netdev_priv(dev);
 734         card = tp->tmspriv;
 735         kfree(card);
 736         tp->tmspriv = NULL;
 737
 738         unregister_netdev(dev);
 739         release_region(dev->base_addr-MADGEMC_SIF_OFFSET, MADGEMC_IO_EXTENT);
 740         free_irq(dev->irq, dev);
 741         tmsdev_term(dev);
 742         free_netdev(dev);
 743         dev_set_drvdata(device, NULL);
 744
 745         return 0;
 746 }
 747
 748 static short madgemc_adapter_ids[] __initdata = {
 749         0x002d,
 750         0x0000
 751 };
 752
 753 static struct mca_driver madgemc_driver = {
 754         .id_table = madgemc_adapter_ids,
 755         .driver = {
 756                 .name = "madgemc",
 757                 .bus = &mca_bus_type,
 758                 .probe = madgemc_probe,
 759                 .remove = __devexit_p(madgemc_remove),
 760         },
 761 };
 762
 763 static int __init madgemc_init (void)
 764 {
 765         return mca_register_driver (&madgemc_driver);
 766 }
 767
 768 static void __exit madgemc_exit (void)
 769 {
 770         mca_unregister_driver (&madgemc_driver);
 771 }
 772
 773 module_init(madgemc_init);
 774 module_exit(madgemc_exit);
 775
 776 MODULE_LICENSE("GPL");
 777