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
  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 static struct net_device_ops madgemc_netdev_ops __read_mostly;
 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
 156         if (versionprinted++ == 0)
 157                 printk("%s", version);
 158
 159         if(mca_device_claimed(mdev))
 160                 return -EBUSY;
 161         mca_device_set_claim(mdev, 1);
 162
 163         dev = alloc_trdev(sizeof(struct net_local));
 164         if (!dev) {
 165                 printk("madgemc: unable to allocate dev space\n");
 166                 mca_device_set_claim(mdev, 0);
 167                 ret = -ENOMEM;
 168                 goto getout;
 169         }
 170
 171         dev->netdev_ops = &madgemc_netdev_ops;
 172
 173         card = kmalloc(sizeof(struct card_info), GFP_KERNEL);
 174         if (card==NULL) {
 175                 printk("madgemc: unable to allocate card struct\n");
 176                 ret = -ENOMEM;
 177                 goto getout1;
 178         }
 179
 180         /*
 181          * Parse configuration information.  This all comes
 182          * directly from the publicly available @002d.ADF.
 183          * Get it from Madge or your local ADF library.
 184          */
 185
 186         /*
 187          * Base address
 188          */
 189         dev->base_addr = 0x0a20 +
 190                 ((mdev->pos[2] & MC16_POS2_ADDR2)?0x0400:0) +
 191                 ((mdev->pos[0] & MC16_POS0_ADDR1)?0x1000:0) +
 192                 ((mdev->pos[3] & MC16_POS3_ADDR3)?0x2000:0);
 193
 194         /*
 195          * Interrupt line
 196          */
 197         switch(mdev->pos[0] >> 6) { /* upper two bits */
 198                 case 0x1: dev->irq = 3; break;
 199                 case 0x2: dev->irq = 9; break; /* IRQ 2 = IRQ 9 */
 200                 case 0x3: dev->irq = 10; break;
 201                 default: dev->irq = 0; break;
 202         }
 203
 204         if (dev->irq == 0) {
 205                 printk("%s: invalid IRQ\n", dev->name);
 206                 ret = -EBUSY;
 207                 goto getout2;
 208         }
 209
 210         if (!request_region(dev->base_addr, MADGEMC_IO_EXTENT,
 211                            "madgemc")) {
 212                 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);
 213                 dev->base_addr += MADGEMC_SIF_OFFSET;
 214                 ret = -EBUSY;
 215                 goto getout2;
 216         }
 217         dev->base_addr += MADGEMC_SIF_OFFSET;
 218
 219         /*
 220          * Arbitration Level
 221          */
 222         card->arblevel = ((mdev->pos[0] >> 1) & 0x7) + 8;
 223
 224         /*
 225          * Burst mode and Fairness
 226          */
 227         card->burstmode = ((mdev->pos[2] >> 6) & 0x3);
 228         card->fairness = ((mdev->pos[2] >> 4) & 0x1);
 229
 230         /*
 231          * Ring Speed
 232          */
 233         if ((mdev->pos[1] >> 2)&0x1)
 234                 card->ringspeed = 2; /* not selected */
 235         else if ((mdev->pos[2] >> 5) & 0x1)
 236                 card->ringspeed = 1; /* 16Mb */
 237         else
 238                 card->ringspeed = 0; /* 4Mb */
 239
 240         /*
 241          * Cable type
 242          */
 243         if ((mdev->pos[1] >> 6)&0x1)
 244                 card->cabletype = 1; /* STP/DB9 */
 245         else
 246                 card->cabletype = 0; /* UTP/RJ-45 */
 247
 248
 249         /*
 250          * ROM Info. This requires us to actually twiddle
 251          * bits on the card, so we must ensure above that
 252          * the base address is free of conflict (request_region above).
 253          */
 254         madgemc_read_rom(dev, card);
 255
 256         if (card->manid != 0x4d) { /* something went wrong */
 257                 printk(KERN_INFO "%s: Madge MC ROM read failed (unknown manufacturer ID %02x)\n", dev->name, card->manid);
 258                 goto getout3;
 259         }
 260
 261         if ((card->cardtype != 0x08) && (card->cardtype != 0x0d)) {
 262                 printk(KERN_INFO "%s: Madge MC ROM read failed (unknown card ID %02x)\n", dev->name, card->cardtype);
 263                 ret = -EIO;
 264                 goto getout3;
 265         }
 266
 267         /* All cards except Rev 0 and 1 MC16's have 256kb of RAM */
 268         if ((card->cardtype == 0x08) && (card->cardrev <= 0x01))
 269                 card->ramsize = 128;
 270         else
 271                 card->ramsize = 256;
 272
 273         printk("%s: %s Rev %d at 0x%04lx IRQ %d\n",
 274                dev->name,
 275                (card->cardtype == 0x08)?MADGEMC16_CARDNAME:
 276                MADGEMC32_CARDNAME, card->cardrev,
 277                dev->base_addr, dev->irq);
 278
 279         if (card->cardtype == 0x0d)
 280                 printk("%s:     Warning: MC32 support is experimental and highly untested\n", dev->name);
 281
 282         if (card->ringspeed==2) { /* Unknown */
 283                 printk("%s:     Warning: Ring speed not set in POS -- Please run the reference disk and set it!\n", dev->name);
 284                 card->ringspeed = 1; /* default to 16mb */
 285         }
 286
 287         printk("%s:     RAM Size: %dKB\n", dev->name, card->ramsize);
 288
 289         printk("%s:     Ring Speed: %dMb/sec on %s\n", dev->name,
 290                (card->ringspeed)?16:4,
 291                card->cabletype?"STP/DB9":"UTP/RJ-45");
 292         printk("%s:     Arbitration Level: %d\n", dev->name,
 293                card->arblevel);
 294
 295         printk("%s:     Burst Mode: ", dev->name);
 296         switch(card->burstmode) {
 297                 case 0: printk("Cycle steal"); break;
 298                 case 1: printk("Limited burst"); break;
 299                 case 2: printk("Delayed release"); break;
 300                 case 3: printk("Immediate release"); break;
 301         }
 302         printk(" (%s)\n", (card->fairness)?"Unfair":"Fair");
 303
 304
 305         /*
 306          * Enable SIF before we assign the interrupt handler,
 307          * just in case we get spurious interrupts that need
 308          * handling.
 309          */
 310         outb(0, dev->base_addr + MC_CONTROL_REG0); /* sanity */
 311         madgemc_setsifsel(dev, 1);
 312         if (request_irq(dev->irq, madgemc_interrupt, IRQF_SHARED,
 313                        "madgemc", dev)) {
 314                 ret = -EBUSY;
 315                 goto getout3;
 316         }
 317
 318         madgemc_chipset_init(dev); /* enables interrupts! */
 319         madgemc_setcabletype(dev, card->cabletype);
 320
 321         /* Setup MCA structures */
 322         mca_device_set_name(mdev, (card->cardtype == 0x08)?MADGEMC16_CARDNAME:MADGEMC32_CARDNAME);
 323         mca_set_adapter_procfn(mdev->slot, madgemc_mcaproc, dev);
 324
 325         printk("%s:     Ring Station Address: %pM\n",
 326                dev->name, dev->dev_addr);
 327
 328         if (tmsdev_init(dev, device)) {
 329                 printk("%s: unable to get memory for dev->priv.\n",
 330                        dev->name);
 331                 ret = -ENOMEM;
 332                 goto getout4;
 333         }
 334         tp = netdev_priv(dev);
 335
 336         /*
 337          * The MC16 is physically a 32bit card.  However, Madge
 338          * insists on calling it 16bit, so I'll assume here that
 339          * they know what they're talking about.  Cut off DMA
 340          * at 16mb.
 341          */
 342         tp->setnselout = madgemc_setnselout_pins;
 343         tp->sifwriteb = madgemc_sifwriteb;
 344         tp->sifreadb = madgemc_sifreadb;
 345         tp->sifwritew = madgemc_sifwritew;
 346         tp->sifreadw = madgemc_sifreadw;
 347         tp->DataRate = (card->ringspeed)?SPEED_16:SPEED_4;
 348
 349         memcpy(tp->ProductID, "Madge MCA 16/4    ", PROD_ID_SIZE + 1);
 350
 351         tp->tmspriv = card;
 352         dev_set_drvdata(device, dev);
 353
 354         if (register_netdev(dev) == 0)
 355                 return 0;
 356
 357         dev_set_drvdata(device, NULL);
 358         ret = -ENOMEM;
 359 getout4:
 360         free_irq(dev->irq, dev);
 361 getout3:
 362         release_region(dev->base_addr-MADGEMC_SIF_OFFSET,
 363                        MADGEMC_IO_EXTENT);
 364 getout2:
 365         kfree(card);
 366 getout1:
 367         free_netdev(dev);
 368 getout:
 369         mca_device_set_claim(mdev, 0);
 370         return ret;
 371 }
 372
 373 /*
 374  * Handle interrupts generated by the card
 375  *
 376  * The MicroChannel Madge cards need slightly more handling
 377  * after an interrupt than other TMS380 cards do.
 378  *
 379  * First we must make sure it was this card that generated the
 380  * interrupt (since interrupt sharing is allowed).  Then,
 381  * because we're using level-triggered interrupts (as is
 382  * standard on MCA), we must toggle the interrupt line
 383  * on the card in order to claim and acknowledge the interrupt.
 384  * Once that is done, the interrupt should be handlable in
 385  * the normal tms380tr_interrupt() routine.
 386  *
 387  * There's two ways we can check to see if the interrupt is ours,
 388  * both with their own disadvantages...
 389  *
 390  * 1)   Read in the SIFSTS register from the TMS controller.  This
 391  *      is guarenteed to be accurate, however, there's a fairly
 392  *      large performance penalty for doing so: the Madge chips
 393  *      must request the register from the Eagle, the Eagle must
 394  *      read them from its internal bus, and then take the route
 395  *      back out again, for a 16bit read.
 396  *
 397  * 2)   Use the MC_CONTROL_REG0_SINTR bit from the Madge ASICs.
 398  *      The major disadvantage here is that the accuracy of the
 399  *      bit is in question.  However, it cuts out the extra read
 400  *      cycles it takes to read the Eagle's SIF, as its only an
 401  *      8bit read, and theoretically the Madge bit is directly
 402  *      connected to the interrupt latch coming out of the Eagle
 403  *      hardware (that statement is not verified).
 404  *
 405  * I can't determine which of these methods has the best win.  For now,
 406  * we make a compromise.  Use the Madge way for the first interrupt,
 407  * which should be the fast-path, and then once we hit the first
 408  * interrupt, keep on trying using the SIF method until we've
 409  * exhausted all contiguous interrupts.
 410  *
 411  */
 412 static irqreturn_t madgemc_interrupt(int irq, void *dev_id)
 413 {
 414         int pending,reg1;
 415         struct net_device *dev;
 416
 417         if (!dev_id) {
 418                 printk("madgemc_interrupt: was not passed a dev_id!\n");
 419                 return IRQ_NONE;
 420         }
 421
 422         dev = (struct net_device *)dev_id;
 423
 424         /* Make sure its really us. -- the Madge way */
 425         pending = inb(dev->base_addr + MC_CONTROL_REG0);
 426         if (!(pending & MC_CONTROL_REG0_SINTR))
 427                 return IRQ_NONE; /* not our interrupt */
 428
 429         /*
 430          * Since we're level-triggered, we may miss the rising edge
 431          * of the next interrupt while we're off handling this one,
 432          * so keep checking until the SIF verifies that it has nothing
 433          * left for us to do.
 434          */
 435         pending = STS_SYSTEM_IRQ;
 436         do {
 437                 if (pending & STS_SYSTEM_IRQ) {
 438
 439                         /* Toggle the interrupt to reset the latch on card */
 440                         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 441                         outb(reg1 ^ MC_CONTROL_REG1_SINTEN,
 442                              dev->base_addr + MC_CONTROL_REG1);
 443                         outb(reg1, dev->base_addr + MC_CONTROL_REG1);
 444
 445                         /* Continue handling as normal */
 446                         tms380tr_interrupt(irq, dev_id);
 447
 448                         pending = SIFREADW(SIFSTS); /* restart - the SIF way */
 449
 450                 } else
 451                         return IRQ_HANDLED;
 452         } while (1);
 453
 454         return IRQ_HANDLED; /* not reachable */
 455 }
 456
 457 /*
 458  * Set the card to the prefered ring speed.
 459  *
 460  * Unlike newer cards, the MC16/32 have their speed selection
 461  * circuit connected to the Madge ASICs and not to the TMS380
 462  * NSELOUT pins. Set the ASIC bits correctly here, and return
 463  * zero to leave the TMS NSELOUT bits unaffected.
 464  *
 465  */
 466 static unsigned short madgemc_setnselout_pins(struct net_device *dev)
 467 {
 468         unsigned char reg1;
 469         struct net_local *tp = netdev_priv(dev);
 470
 471         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 472
 473         if(tp->DataRate == SPEED_16)
 474                 reg1 |= MC_CONTROL_REG1_SPEED_SEL; /* add for 16mb */
 475         else if (reg1 & MC_CONTROL_REG1_SPEED_SEL)
 476                 reg1 ^= MC_CONTROL_REG1_SPEED_SEL; /* remove for 4mb */
 477         outb(reg1, dev->base_addr + MC_CONTROL_REG1);
 478
 479         return 0; /* no change */
 480 }
 481
 482 /*
 483  * Set the register page.  This equates to the SRSX line
 484  * on the TMS380Cx6.
 485  *
 486  * Register selection is normally done via three contiguous
 487  * bits.  However, some boards (such as the MC16/32) use only
 488  * two bits, plus a separate bit in the glue chip.  This
 489  * sets the SRSX bit (the top bit).  See page 4-17 in the
 490  * Yellow Book for which registers are affected.
 491  *
 492  */
 493 static void madgemc_setregpage(struct net_device *dev, int page)
 494 {
 495         static int reg1;
 496
 497         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 498         if ((page == 0) && (reg1 & MC_CONTROL_REG1_SRSX)) {
 499                 outb(reg1 ^ MC_CONTROL_REG1_SRSX,
 500                      dev->base_addr + MC_CONTROL_REG1);
 501         }
 502         else if (page == 1) {
 503                 outb(reg1 | MC_CONTROL_REG1_SRSX,
 504                      dev->base_addr + MC_CONTROL_REG1);
 505         }
 506         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 507
 508         return;
 509 }
 510
 511 /*
 512  * The SIF registers are not mapped into register space by default
 513  * Set this to 1 to map them, 0 to map the BIA ROM.
 514  *
 515  */
 516 static void madgemc_setsifsel(struct net_device *dev, int val)
 517 {
 518         unsigned int reg0;
 519
 520         reg0 = inb(dev->base_addr + MC_CONTROL_REG0);
 521         if ((val == 0) && (reg0 & MC_CONTROL_REG0_SIFSEL)) {
 522                 outb(reg0 ^ MC_CONTROL_REG0_SIFSEL,
 523                      dev->base_addr + MC_CONTROL_REG0);
 524         } else if (val == 1) {
 525                 outb(reg0 | MC_CONTROL_REG0_SIFSEL,
 526                      dev->base_addr + MC_CONTROL_REG0);
 527         }
 528         reg0 = inb(dev->base_addr + MC_CONTROL_REG0);
 529
 530         return;
 531 }
 532
 533 /*
 534  * Enable SIF interrupts
 535  *
 536  * This does not enable interrupts in the SIF, but rather
 537  * enables SIF interrupts to be passed onto the host.
 538  *
 539  */
 540 static void madgemc_setint(struct net_device *dev, int val)
 541 {
 542         unsigned int reg1;
 543
 544         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 545         if ((val == 0) && (reg1 & MC_CONTROL_REG1_SINTEN)) {
 546                 outb(reg1 ^ MC_CONTROL_REG1_SINTEN,
 547                      dev->base_addr + MC_CONTROL_REG1);
 548         } else if (val == 1) {
 549                 outb(reg1 | MC_CONTROL_REG1_SINTEN,
 550                      dev->base_addr + MC_CONTROL_REG1);
 551         }
 552
 553         return;
 554 }
 555
 556 /*
 557  * Cable type is set via control register 7. Bit zero high
 558  * for UTP, low for STP.
 559  */
 560 static void madgemc_setcabletype(struct net_device *dev, int type)
 561 {
 562         outb((type==0)?MC_CONTROL_REG7_CABLEUTP:MC_CONTROL_REG7_CABLESTP,
 563              dev->base_addr + MC_CONTROL_REG7);
 564 }
 565
 566 /*
 567  * Enable the functions of the Madge chipset needed for
 568  * full working order.
 569  */
 570 static int madgemc_chipset_init(struct net_device *dev)
 571 {
 572         outb(0, dev->base_addr + MC_CONTROL_REG1); /* pull SRESET low */
 573         tms380tr_wait(100); /* wait for card to reset */
 574
 575         /* bring back into normal operating mode */
 576         outb(MC_CONTROL_REG1_NSRESET, dev->base_addr + MC_CONTROL_REG1);
 577
 578         /* map SIF registers */
 579         madgemc_setsifsel(dev, 1);
 580
 581         /* enable SIF interrupts */
 582         madgemc_setint(dev, 1);
 583
 584         return 0;
 585 }
 586
 587 /*
 588  * Disable the board, and put back into power-up state.
 589  */
 590 static void madgemc_chipset_close(struct net_device *dev)
 591 {
 592         /* disable interrupts */
 593         madgemc_setint(dev, 0);
 594         /* unmap SIF registers */
 595         madgemc_setsifsel(dev, 0);
 596
 597         return;
 598 }
 599
 600 /*
 601  * Read the card type (MC16 or MC32) from the card.
 602  *
 603  * The configuration registers are stored in two separate
 604  * pages.  Pages are flipped by clearing bit 3 of CONTROL_REG0 (PAGE)
 605  * for page zero, or setting bit 3 for page one.
 606  *
 607  * Page zero contains the following data:
 608  *      Byte 0: Manufacturer ID (0x4D -- ASCII "M")
 609  *      Byte 1: Card type:
 610  *                      0x08 for MC16
 611  *                      0x0D for MC32
 612  *      Byte 2: Card revision
 613  *      Byte 3: Mirror of POS config register 0
 614  *      Byte 4: Mirror of POS 1
 615  *      Byte 5: Mirror of POS 2
 616  *
 617  * Page one contains the following data:
 618  *      Byte 0: Unused
 619  *      Byte 1-6: BIA, MSB to LSB.
 620  *
 621  * Note that to read the BIA, we must unmap the SIF registers
 622  * by clearing bit 2 of CONTROL_REG0 (SIFSEL), as the data
 623  * will reside in the same logical location.  For this reason,
 624  * _never_ read the BIA while the Eagle processor is running!
 625  * The SIF will be completely inaccessible until the BIA operation
 626  * is complete.
 627  *
 628  */
 629 static void madgemc_read_rom(struct net_device *dev, struct card_info *card)
 630 {
 631         unsigned long ioaddr;
 632         unsigned char reg0, reg1, tmpreg0, i;
 633
 634         ioaddr = dev->base_addr;
 635
 636         reg0 = inb(ioaddr + MC_CONTROL_REG0);
 637         reg1 = inb(ioaddr + MC_CONTROL_REG1);
 638
 639         /* Switch to page zero and unmap SIF */
 640         tmpreg0 = reg0 & ~(MC_CONTROL_REG0_PAGE + MC_CONTROL_REG0_SIFSEL);
 641         outb(tmpreg0, ioaddr + MC_CONTROL_REG0);
 642
 643         card->manid = inb(ioaddr + MC_ROM_MANUFACTURERID);
 644         card->cardtype = inb(ioaddr + MC_ROM_ADAPTERID);
 645         card->cardrev = inb(ioaddr + MC_ROM_REVISION);
 646
 647         /* Switch to rom page one */
 648         outb(tmpreg0 | MC_CONTROL_REG0_PAGE, ioaddr + MC_CONTROL_REG0);
 649
 650         /* Read BIA */
 651         dev->addr_len = 6;
 652         for (i = 0; i < 6; i++)
 653                 dev->dev_addr[i] = inb(ioaddr + MC_ROM_BIA_START + i);
 654
 655         /* Restore original register values */
 656         outb(reg0, ioaddr + MC_CONTROL_REG0);
 657         outb(reg1, ioaddr + MC_CONTROL_REG1);
 658
 659         return;
 660 }
 661
 662 static int madgemc_open(struct net_device *dev)
 663 {
 664         /*
 665          * Go ahead and reinitialize the chipset again, just to
 666          * make sure we didn't get left in a bad state.
 667          */
 668         madgemc_chipset_init(dev);
 669         tms380tr_open(dev);
 670         return 0;
 671 }
 672
 673 static int madgemc_close(struct net_device *dev)
 674 {
 675         tms380tr_close(dev);
 676         madgemc_chipset_close(dev);
 677         return 0;
 678 }
 679
 680 /*
 681  * Give some details available from /proc/mca/slotX
 682  */
 683 static int madgemc_mcaproc(char *buf, int slot, void *d)
 684 {
 685         struct net_device *dev = (struct net_device *)d;
 686         struct net_local *tp = netdev_priv(dev);
 687         struct card_info *curcard = tp->tmspriv;
 688         int len = 0;
 689
 690         len += sprintf(buf+len, "-------\n");
 691         if (curcard) {
 692                 len += sprintf(buf+len, "Card Revision: %d\n", curcard->cardrev);
 693                 len += sprintf(buf+len, "RAM Size: %dkb\n", curcard->ramsize);
 694                 len += sprintf(buf+len, "Cable type: %s\n", (curcard->cabletype)?"STP/DB9":"UTP/RJ-45");
 695                 len += sprintf(buf+len, "Configured ring speed: %dMb/sec\n", (curcard->ringspeed)?16:4);
 696                 len += sprintf(buf+len, "Running ring speed: %dMb/sec\n", (tp->DataRate==SPEED_16)?16:4);
 697                 len += sprintf(buf+len, "Device: %s\n", dev->name);
 698                 len += sprintf(buf+len, "IO Port: 0x%04lx\n", dev->base_addr);
 699                 len += sprintf(buf+len, "IRQ: %d\n", dev->irq);
 700                 len += sprintf(buf+len, "Arbitration Level: %d\n", curcard->arblevel);
 701                 len += sprintf(buf+len, "Burst Mode: ");
 702                 switch(curcard->burstmode) {
 703                 case 0: len += sprintf(buf+len, "Cycle steal"); break;
 704                 case 1: len += sprintf(buf+len, "Limited burst"); break;
 705                 case 2: len += sprintf(buf+len, "Delayed release"); break;
 706                 case 3: len += sprintf(buf+len, "Immediate release"); break;
 707                 }
 708                 len += sprintf(buf+len, " (%s)\n", (curcard->fairness)?"Unfair":"Fair");
 709
 710                 len += sprintf(buf+len, "Ring Station Address: %pM\n",
 711                                dev->dev_addr);
 712         } else
 713                 len += sprintf(buf+len, "Card not configured\n");
 714
 715         return len;
 716 }
 717
 718 static int __devexit madgemc_remove(struct device *device)
 719 {
 720         struct net_device *dev = dev_get_drvdata(device);
 721         struct net_local *tp;
 722         struct card_info *card;
 723
 724         BUG_ON(!dev);
 725
 726         tp = netdev_priv(dev);
 727         card = tp->tmspriv;
 728         kfree(card);
 729         tp->tmspriv = NULL;
 730
 731         unregister_netdev(dev);
 732         release_region(dev->base_addr-MADGEMC_SIF_OFFSET, MADGEMC_IO_EXTENT);
 733         free_irq(dev->irq, dev);
 734         tmsdev_term(dev);
 735         free_netdev(dev);
 736         dev_set_drvdata(device, NULL);
 737
 738         return 0;
 739 }
 740
 741 static short madgemc_adapter_ids[] __initdata = {
 742         0x002d,
 743         0x0000
 744 };
 745
 746 static struct mca_driver madgemc_driver = {
 747         .id_table = madgemc_adapter_ids,
 748         .driver = {
 749                 .name = "madgemc",
 750                 .bus = &mca_bus_type,
 751                 .probe = madgemc_probe,
 752                 .remove = __devexit_p(madgemc_remove),
 753         },
 754 };
 755
 756 static int __init madgemc_init (void)
 757 {
 758         madgemc_netdev_ops = tms380tr_netdev_ops;
 759         madgemc_netdev_ops.ndo_open = madgemc_open;
 760         madgemc_netdev_ops.ndo_stop = madgemc_close;
 761
 762         return mca_register_driver (&madgemc_driver);
 763 }
 764
 765 static void __exit madgemc_exit (void)
 766 {
 767         mca_unregister_driver (&madgemc_driver);
 768 }
 769
 770 module_init(madgemc_init);
 771 module_exit(madgemc_exit);
 772
 773 MODULE_LICENSE("GPL");
 774