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, i = 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         SET_MODULE_OWNER(dev);
 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: ", dev->name);
 327         printk("%2.2x", dev->dev_addr[0]);
 328         for (i = 1; i < 6; i++)
 329                 printk(":%2.2x", dev->dev_addr[i]);
 330         printk("\n");
 331
 332         if (tmsdev_init(dev, device)) {
 333                 printk("%s: unable to get memory for dev->priv.\n",
 334                        dev->name);
 335                 ret = -ENOMEM;
 336                 goto getout4;
 337         }
 338         tp = netdev_priv(dev);
 339
 340         /*
 341          * The MC16 is physically a 32bit card.  However, Madge
 342          * insists on calling it 16bit, so I'll assume here that
 343          * they know what they're talking about.  Cut off DMA
 344          * at 16mb.
 345          */
 346         tp->setnselout = madgemc_setnselout_pins;
 347         tp->sifwriteb = madgemc_sifwriteb;
 348         tp->sifreadb = madgemc_sifreadb;
 349         tp->sifwritew = madgemc_sifwritew;
 350         tp->sifreadw = madgemc_sifreadw;
 351         tp->DataRate = (card->ringspeed)?SPEED_16:SPEED_4;
 352
 353         memcpy(tp->ProductID, "Madge MCA 16/4    ", PROD_ID_SIZE + 1);
 354
 355         dev->open = madgemc_open;
 356         dev->stop = madgemc_close;
 357
 358         tp->tmspriv = card;
 359         dev_set_drvdata(device, dev);
 360
 361         if (register_netdev(dev) == 0)
 362                 return 0;
 363
 364         dev_set_drvdata(device, NULL);
 365         ret = -ENOMEM;
 366 getout4:
 367         free_irq(dev->irq, dev);
 368 getout3:
 369         release_region(dev->base_addr-MADGEMC_SIF_OFFSET,
 370                        MADGEMC_IO_EXTENT);
 371 getout2:
 372         kfree(card);
 373 getout1:
 374         free_netdev(dev);
 375 getout:
 376         mca_device_set_claim(mdev, 0);
 377         return ret;
 378 }
 379
 380 /*
 381  * Handle interrupts generated by the card
 382  *
 383  * The MicroChannel Madge cards need slightly more handling
 384  * after an interrupt than other TMS380 cards do.
 385  *
 386  * First we must make sure it was this card that generated the
 387  * interrupt (since interrupt sharing is allowed).  Then,
 388  * because we're using level-triggered interrupts (as is
 389  * standard on MCA), we must toggle the interrupt line
 390  * on the card in order to claim and acknowledge the interrupt.
 391  * Once that is done, the interrupt should be handlable in
 392  * the normal tms380tr_interrupt() routine.
 393  *
 394  * There's two ways we can check to see if the interrupt is ours,
 395  * both with their own disadvantages...
 396  *
 397  * 1)   Read in the SIFSTS register from the TMS controller.  This
 398  *      is guarenteed to be accurate, however, there's a fairly
 399  *      large performance penalty for doing so: the Madge chips
 400  *      must request the register from the Eagle, the Eagle must
 401  *      read them from its internal bus, and then take the route
 402  *      back out again, for a 16bit read.
 403  *
 404  * 2)   Use the MC_CONTROL_REG0_SINTR bit from the Madge ASICs.
 405  *      The major disadvantage here is that the accuracy of the
 406  *      bit is in question.  However, it cuts out the extra read
 407  *      cycles it takes to read the Eagle's SIF, as its only an
 408  *      8bit read, and theoretically the Madge bit is directly
 409  *      connected to the interrupt latch coming out of the Eagle
 410  *      hardware (that statement is not verified).
 411  *
 412  * I can't determine which of these methods has the best win.  For now,
 413  * we make a compromise.  Use the Madge way for the first interrupt,
 414  * which should be the fast-path, and then once we hit the first
 415  * interrupt, keep on trying using the SIF method until we've
 416  * exhausted all contiguous interrupts.
 417  *
 418  */
 419 static irqreturn_t madgemc_interrupt(int irq, void *dev_id)
 420 {
 421         int pending,reg1;
 422         struct net_device *dev;
 423
 424         if (!dev_id) {
 425                 printk("madgemc_interrupt: was not passed a dev_id!\n");
 426                 return IRQ_NONE;
 427         }
 428
 429         dev = (struct net_device *)dev_id;
 430
 431         /* Make sure its really us. -- the Madge way */
 432         pending = inb(dev->base_addr + MC_CONTROL_REG0);
 433         if (!(pending & MC_CONTROL_REG0_SINTR))
 434                 return IRQ_NONE; /* not our interrupt */
 435
 436         /*
 437          * Since we're level-triggered, we may miss the rising edge
 438          * of the next interrupt while we're off handling this one,
 439          * so keep checking until the SIF verifies that it has nothing
 440          * left for us to do.
 441          */
 442         pending = STS_SYSTEM_IRQ;
 443         do {
 444                 if (pending & STS_SYSTEM_IRQ) {
 445
 446                         /* Toggle the interrupt to reset the latch on card */
 447                         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 448                         outb(reg1 ^ MC_CONTROL_REG1_SINTEN,
 449                              dev->base_addr + MC_CONTROL_REG1);
 450                         outb(reg1, dev->base_addr + MC_CONTROL_REG1);
 451
 452                         /* Continue handling as normal */
 453                         tms380tr_interrupt(irq, dev_id);
 454
 455                         pending = SIFREADW(SIFSTS); /* restart - the SIF way */
 456
 457                 } else
 458                         return IRQ_HANDLED;
 459         } while (1);
 460
 461         return IRQ_HANDLED; /* not reachable */
 462 }
 463
 464 /*
 465  * Set the card to the prefered ring speed.
 466  *
 467  * Unlike newer cards, the MC16/32 have their speed selection
 468  * circuit connected to the Madge ASICs and not to the TMS380
 469  * NSELOUT pins. Set the ASIC bits correctly here, and return
 470  * zero to leave the TMS NSELOUT bits unaffected.
 471  *
 472  */
 473 unsigned short madgemc_setnselout_pins(struct net_device *dev)
 474 {
 475         unsigned char reg1;
 476         struct net_local *tp = netdev_priv(dev);
 477
 478         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 479
 480         if(tp->DataRate == SPEED_16)
 481                 reg1 |= MC_CONTROL_REG1_SPEED_SEL; /* add for 16mb */
 482         else if (reg1 & MC_CONTROL_REG1_SPEED_SEL)
 483                 reg1 ^= MC_CONTROL_REG1_SPEED_SEL; /* remove for 4mb */
 484         outb(reg1, dev->base_addr + MC_CONTROL_REG1);
 485
 486         return 0; /* no change */
 487 }
 488
 489 /*
 490  * Set the register page.  This equates to the SRSX line
 491  * on the TMS380Cx6.
 492  *
 493  * Register selection is normally done via three contiguous
 494  * bits.  However, some boards (such as the MC16/32) use only
 495  * two bits, plus a separate bit in the glue chip.  This
 496  * sets the SRSX bit (the top bit).  See page 4-17 in the
 497  * Yellow Book for which registers are affected.
 498  *
 499  */
 500 static void madgemc_setregpage(struct net_device *dev, int page)
 501 {
 502         static int reg1;
 503
 504         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 505         if ((page == 0) && (reg1 & MC_CONTROL_REG1_SRSX)) {
 506                 outb(reg1 ^ MC_CONTROL_REG1_SRSX,
 507                      dev->base_addr + MC_CONTROL_REG1);
 508         }
 509         else if (page == 1) {
 510                 outb(reg1 | MC_CONTROL_REG1_SRSX,
 511                      dev->base_addr + MC_CONTROL_REG1);
 512         }
 513         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 514
 515         return;
 516 }
 517
 518 /*
 519  * The SIF registers are not mapped into register space by default
 520  * Set this to 1 to map them, 0 to map the BIA ROM.
 521  *
 522  */
 523 static void madgemc_setsifsel(struct net_device *dev, int val)
 524 {
 525         unsigned int reg0;
 526
 527         reg0 = inb(dev->base_addr + MC_CONTROL_REG0);
 528         if ((val == 0) && (reg0 & MC_CONTROL_REG0_SIFSEL)) {
 529                 outb(reg0 ^ MC_CONTROL_REG0_SIFSEL,
 530                      dev->base_addr + MC_CONTROL_REG0);
 531         } else if (val == 1) {
 532                 outb(reg0 | MC_CONTROL_REG0_SIFSEL,
 533                      dev->base_addr + MC_CONTROL_REG0);
 534         }
 535         reg0 = inb(dev->base_addr + MC_CONTROL_REG0);
 536
 537         return;
 538 }
 539
 540 /*
 541  * Enable SIF interrupts
 542  *
 543  * This does not enable interrupts in the SIF, but rather
 544  * enables SIF interrupts to be passed onto the host.
 545  *
 546  */
 547 static void madgemc_setint(struct net_device *dev, int val)
 548 {
 549         unsigned int reg1;
 550
 551         reg1 = inb(dev->base_addr + MC_CONTROL_REG1);
 552         if ((val == 0) && (reg1 & MC_CONTROL_REG1_SINTEN)) {
 553                 outb(reg1 ^ MC_CONTROL_REG1_SINTEN,
 554                      dev->base_addr + MC_CONTROL_REG1);
 555         } else if (val == 1) {
 556                 outb(reg1 | MC_CONTROL_REG1_SINTEN,
 557                      dev->base_addr + MC_CONTROL_REG1);
 558         }
 559
 560         return;
 561 }
 562
 563 /*
 564  * Cable type is set via control register 7. Bit zero high
 565  * for UTP, low for STP.
 566  */
 567 static void madgemc_setcabletype(struct net_device *dev, int type)
 568 {
 569         outb((type==0)?MC_CONTROL_REG7_CABLEUTP:MC_CONTROL_REG7_CABLESTP,
 570              dev->base_addr + MC_CONTROL_REG7);
 571 }
 572
 573 /*
 574  * Enable the functions of the Madge chipset needed for
 575  * full working order.
 576  */
 577 static int madgemc_chipset_init(struct net_device *dev)
 578 {
 579         outb(0, dev->base_addr + MC_CONTROL_REG1); /* pull SRESET low */
 580         tms380tr_wait(100); /* wait for card to reset */
 581
 582         /* bring back into normal operating mode */
 583         outb(MC_CONTROL_REG1_NSRESET, dev->base_addr + MC_CONTROL_REG1);
 584
 585         /* map SIF registers */
 586         madgemc_setsifsel(dev, 1);
 587
 588         /* enable SIF interrupts */
 589         madgemc_setint(dev, 1);
 590
 591         return 0;
 592 }
 593
 594 /*
 595  * Disable the board, and put back into power-up state.
 596  */
 597 static void madgemc_chipset_close(struct net_device *dev)
 598 {
 599         /* disable interrupts */
 600         madgemc_setint(dev, 0);
 601         /* unmap SIF registers */
 602         madgemc_setsifsel(dev, 0);
 603
 604         return;
 605 }
 606
 607 /*
 608  * Read the card type (MC16 or MC32) from the card.
 609  *
 610  * The configuration registers are stored in two separate
 611  * pages.  Pages are flipped by clearing bit 3 of CONTROL_REG0 (PAGE)
 612  * for page zero, or setting bit 3 for page one.
 613  *
 614  * Page zero contains the following data:
 615  *      Byte 0: Manufacturer ID (0x4D -- ASCII "M")
 616  *      Byte 1: Card type:
 617  *                      0x08 for MC16
 618  *                      0x0D for MC32
 619  *      Byte 2: Card revision
 620  *      Byte 3: Mirror of POS config register 0
 621  *      Byte 4: Mirror of POS 1
 622  *      Byte 5: Mirror of POS 2
 623  *
 624  * Page one contains the following data:
 625  *      Byte 0: Unused
 626  *      Byte 1-6: BIA, MSB to LSB.
 627  *
 628  * Note that to read the BIA, we must unmap the SIF registers
 629  * by clearing bit 2 of CONTROL_REG0 (SIFSEL), as the data
 630  * will reside in the same logical location.  For this reason,
 631  * _never_ read the BIA while the Eagle processor is running!
 632  * The SIF will be completely inaccessible until the BIA operation
 633  * is complete.
 634  *
 635  */
 636 static void madgemc_read_rom(struct net_device *dev, struct card_info *card)
 637 {
 638         unsigned long ioaddr;
 639         unsigned char reg0, reg1, tmpreg0, i;
 640
 641         ioaddr = dev->base_addr;
 642
 643         reg0 = inb(ioaddr + MC_CONTROL_REG0);
 644         reg1 = inb(ioaddr + MC_CONTROL_REG1);
 645
 646         /* Switch to page zero and unmap SIF */
 647         tmpreg0 = reg0 & ~(MC_CONTROL_REG0_PAGE + MC_CONTROL_REG0_SIFSEL);
 648         outb(tmpreg0, ioaddr + MC_CONTROL_REG0);
 649
 650         card->manid = inb(ioaddr + MC_ROM_MANUFACTURERID);
 651         card->cardtype = inb(ioaddr + MC_ROM_ADAPTERID);
 652         card->cardrev = inb(ioaddr + MC_ROM_REVISION);
 653
 654         /* Switch to rom page one */
 655         outb(tmpreg0 | MC_CONTROL_REG0_PAGE, ioaddr + MC_CONTROL_REG0);
 656
 657         /* Read BIA */
 658         dev->addr_len = 6;
 659         for (i = 0; i < 6; i++)
 660                 dev->dev_addr[i] = inb(ioaddr + MC_ROM_BIA_START + i);
 661
 662         /* Restore original register values */
 663         outb(reg0, ioaddr + MC_CONTROL_REG0);
 664         outb(reg1, ioaddr + MC_CONTROL_REG1);
 665
 666         return;
 667 }
 668
 669 static int madgemc_open(struct net_device *dev)
 670 {
 671         /*
 672          * Go ahead and reinitialize the chipset again, just to
 673          * make sure we didn't get left in a bad state.
 674          */
 675         madgemc_chipset_init(dev);
 676         tms380tr_open(dev);
 677         return 0;
 678 }
 679
 680 static int madgemc_close(struct net_device *dev)
 681 {
 682         tms380tr_close(dev);
 683         madgemc_chipset_close(dev);
 684         return 0;
 685 }
 686
 687 /*
 688  * Give some details available from /proc/mca/slotX
 689  */
 690 static int madgemc_mcaproc(char *buf, int slot, void *d)
 691 {
 692         struct net_device *dev = (struct net_device *)d;
 693         struct net_local *tp = dev->priv;
 694         struct card_info *curcard = tp->tmspriv;
 695         int len = 0;
 696
 697         len += sprintf(buf+len, "-------\n");
 698         if (curcard) {
 699                 struct net_local *tp = netdev_priv(dev);
 700                 int i;
 701
 702                 len += sprintf(buf+len, "Card Revision: %d\n", curcard->cardrev);
 703                 len += sprintf(buf+len, "RAM Size: %dkb\n", curcard->ramsize);
 704                 len += sprintf(buf+len, "Cable type: %s\n", (curcard->cabletype)?"STP/DB9":"UTP/RJ-45");
 705                 len += sprintf(buf+len, "Configured ring speed: %dMb/sec\n", (curcard->ringspeed)?16:4);
 706                 len += sprintf(buf+len, "Running ring speed: %dMb/sec\n", (tp->DataRate==SPEED_16)?16:4);
 707                 len += sprintf(buf+len, "Device: %s\n", dev->name);
 708                 len += sprintf(buf+len, "IO Port: 0x%04lx\n", dev->base_addr);
 709                 len += sprintf(buf+len, "IRQ: %d\n", dev->irq);
 710                 len += sprintf(buf+len, "Arbitration Level: %d\n", curcard->arblevel);
 711                 len += sprintf(buf+len, "Burst Mode: ");
 712                 switch(curcard->burstmode) {
 713                 case 0: len += sprintf(buf+len, "Cycle steal"); break;
 714                 case 1: len += sprintf(buf+len, "Limited burst"); break;
 715                 case 2: len += sprintf(buf+len, "Delayed release"); break;
 716                 case 3: len += sprintf(buf+len, "Immediate release"); break;
 717                 }
 718                 len += sprintf(buf+len, " (%s)\n", (curcard->fairness)?"Unfair":"Fair");
 719
 720                 len += sprintf(buf+len, "Ring Station Address: ");
 721                 len += sprintf(buf+len, "%2.2x", dev->dev_addr[0]);
 722                 for (i = 1; i < 6; i++)
 723                         len += sprintf(buf+len, " %2.2x", dev->dev_addr[i]);
 724                 len += sprintf(buf+len, "\n");
 725         } else
 726                 len += sprintf(buf+len, "Card not configured\n");
 727
 728         return len;
 729 }
 730
 731 static int __devexit madgemc_remove(struct device *device)
 732 {
 733         struct net_device *dev = dev_get_drvdata(device);
 734         struct net_local *tp;
 735         struct card_info *card;
 736
 737         BUG_ON(!dev);
 738
 739         tp = dev->priv;
 740         card = tp->tmspriv;
 741         kfree(card);
 742         tp->tmspriv = NULL;
 743
 744         unregister_netdev(dev);
 745         release_region(dev->base_addr-MADGEMC_SIF_OFFSET, MADGEMC_IO_EXTENT);
 746         free_irq(dev->irq, dev);
 747         tmsdev_term(dev);
 748         free_netdev(dev);
 749         dev_set_drvdata(device, NULL);
 750
 751         return 0;
 752 }
 753
 754 static short madgemc_adapter_ids[] __initdata = {
 755         0x002d,
 756         0x0000
 757 };
 758
 759 static struct mca_driver madgemc_driver = {
 760         .id_table = madgemc_adapter_ids,
 761         .driver = {
 762                 .name = "madgemc",
 763                 .bus = &mca_bus_type,
 764                 .probe = madgemc_probe,
 765                 .remove = __devexit_p(madgemc_remove),
 766         },
 767 };
 768
 769 static int __init madgemc_init (void)
 770 {
 771         return mca_register_driver (&madgemc_driver);
 772 }
 773
 774 static void __exit madgemc_exit (void)
 775 {
 776         mca_unregister_driver (&madgemc_driver);
 777 }
 778
 779 module_init(madgemc_init);
 780 module_exit(madgemc_exit);
 781
 782 MODULE_LICENSE("GPL");
 783