drivers/net/arcnet/com90xx.c

   1 /*
   2  * Linux ARCnet driver - COM90xx chipset (memory-mapped buffers)
   3  *
   4  * Written 1994-1999 by Avery Pennarun.
   5  * Written 1999 by Martin Mares <mj@ucw.cz>.
   6  * Derived from skeleton.c by Donald Becker.
   7  *
   8  * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
   9  *  for sponsoring the further development of this driver.
  10  *
  11  * **********************
  12  *
  13  * The original copyright of skeleton.c was as follows:
  14  *
  15  * skeleton.c Written 1993 by Donald Becker.
  16  * Copyright 1993 United States Government as represented by the
  17  * Director, National Security Agency.  This software may only be used
  18  * and distributed according to the terms of the GNU General Public License as
  19  * modified by SRC, incorporated herein by reference.
  20  *
  21  * **********************
  22  *
  23  * For more details, see drivers/net/arcnet.c
  24  *
  25  * **********************
  26  */
  27 #include <linux/module.h>
  28 #include <linux/moduleparam.h>
  29 #include <linux/init.h>
  30 #include <linux/ioport.h>
  31 #include <linux/delay.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/slab.h>
  34 #include <asm/io.h>
  35 #include <linux/arcdevice.h>
  36
  37
  38 #define VERSION "arcnet: COM90xx chipset support\n"
  39
  40
  41 /* Define this to speed up the autoprobe by assuming if only one io port and
  42  * shmem are left in the list at Stage 5, they must correspond to each
  43  * other.
  44  *
  45  * This is undefined by default because it might not always be true, and the
  46  * extra check makes the autoprobe even more careful.  Speed demons can turn
  47  * it on - I think it should be fine if you only have one ARCnet card
  48  * installed.
  49  *
  50  * If no ARCnet cards are installed, this delay never happens anyway and thus
  51  * the option has no effect.
  52  */
  53 #undef FAST_PROBE
  54
  55
  56 /* Internal function declarations */
  57 static int com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *);
  58 static void com90xx_command(struct net_device *dev, int command);
  59 static int com90xx_status(struct net_device *dev);
  60 static void com90xx_setmask(struct net_device *dev, int mask);
  61 static int com90xx_reset(struct net_device *dev, int really_reset);
  62 static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset,
  63                                  void *buf, int count);
  64 static void com90xx_copy_from_card(struct net_device *dev, int bufnum, int offset,
  65                                    void *buf, int count);
  66
  67 /* Known ARCnet cards */
  68
  69 static struct net_device *cards[16];
  70 static int numcards;
  71
  72 /* Handy defines for ARCnet specific stuff */
  73
  74 /* The number of low I/O ports used by the card */
  75 #define ARCNET_TOTAL_SIZE       16
  76
  77 /* Amount of I/O memory used by the card */
  78 #define BUFFER_SIZE (512)
  79 #define MIRROR_SIZE (BUFFER_SIZE*4)
  80
  81 /* COM 9026 controller chip --> ARCnet register addresses */
  82 #define _INTMASK (ioaddr+0)     /* writable */
  83 #define _STATUS  (ioaddr+0)     /* readable */
  84 #define _COMMAND (ioaddr+1)     /* writable, returns random vals on read (?) */
  85 #define _CONFIG  (ioaddr+2)     /* Configuration register */
  86 #define _RESET   (ioaddr+8)     /* software reset (on read) */
  87 #define _MEMDATA (ioaddr+12)    /* Data port for IO-mapped memory */
  88 #define _ADDR_HI (ioaddr+15)    /* Control registers for said */
  89 #define _ADDR_LO (ioaddr+14)
  90
  91 #undef ASTATUS
  92 #undef ACOMMAND
  93 #undef AINTMASK
  94
  95 #define ASTATUS()       inb(_STATUS)
  96 #define ACOMMAND(cmd)   outb((cmd),_COMMAND)
  97 #define AINTMASK(msk)   outb((msk),_INTMASK)
  98
  99
 100 static int com90xx_skip_probe __initdata = 0;
 101
 102 /* Module parameters */
 103
 104 static int io;                  /* use the insmod io= irq= shmem= options */
 105 static int irq;
 106 static int shmem;
 107 static char device[9];          /* use eg. device=arc1 to change name */
 108
 109 module_param(io, int, 0);
 110 module_param(irq, int, 0);
 111 module_param(shmem, int, 0);
 112 module_param_string(device, device, sizeof(device), 0);
 113
 114 static void __init com90xx_probe(void)
 115 {
 116         int count, status, ioaddr, numprint, airq, openparen = 0;
 117         unsigned long airqmask;
 118         int ports[(0x3f0 - 0x200) / 16 + 1] =
 119         {0};
 120         unsigned long *shmems;
 121         void __iomem **iomem;
 122         int numports, numshmems, *port;
 123         u_long *p;
 124         int index;
 125
 126         if (!io && !irq && !shmem && !*device && com90xx_skip_probe)
 127                 return;
 128
 129         shmems = kzalloc(((0x100000-0xa0000) / 0x800) * sizeof(unsigned long),
 130                          GFP_KERNEL);
 131         if (!shmems)
 132                 return;
 133         iomem = kzalloc(((0x100000-0xa0000) / 0x800) * sizeof(void __iomem *),
 134                          GFP_KERNEL);
 135         if (!iomem) {
 136                 kfree(shmems);
 137                 return;
 138         }
 139
 140         BUGLVL(D_NORMAL) printk(VERSION);
 141
 142         /* set up the arrays where we'll store the possible probe addresses */
 143         numports = numshmems = 0;
 144         if (io)
 145                 ports[numports++] = io;
 146         else
 147                 for (count = 0x200; count <= 0x3f0; count += 16)
 148                         ports[numports++] = count;
 149         if (shmem)
 150                 shmems[numshmems++] = shmem;
 151         else
 152                 for (count = 0xA0000; count <= 0xFF800; count += 2048)
 153                         shmems[numshmems++] = count;
 154
 155         /* Stage 1: abandon any reserved ports, or ones with status==0xFF
 156          * (empty), and reset any others by reading the reset port.
 157          */
 158         numprint = -1;
 159         for (port = &ports[0]; port - ports < numports; port++) {
 160                 numprint++;
 161                 numprint %= 8;
 162                 if (!numprint) {
 163                         BUGMSG2(D_INIT, "\n");
 164                         BUGMSG2(D_INIT, "S1: ");
 165                 }
 166                 BUGMSG2(D_INIT, "%Xh ", *port);
 167
 168                 ioaddr = *port;
 169
 170                 if (!request_region(*port, ARCNET_TOTAL_SIZE, "arcnet (90xx)")) {
 171                         BUGMSG2(D_INIT_REASONS, "(request_region)\n");
 172                         BUGMSG2(D_INIT_REASONS, "S1: ");
 173                         BUGLVL(D_INIT_REASONS) numprint = 0;
 174                         *port-- = ports[--numports];
 175                         continue;
 176                 }
 177                 if (ASTATUS() == 0xFF) {
 178                         BUGMSG2(D_INIT_REASONS, "(empty)\n");
 179                         BUGMSG2(D_INIT_REASONS, "S1: ");
 180                         BUGLVL(D_INIT_REASONS) numprint = 0;
 181                         release_region(*port, ARCNET_TOTAL_SIZE);
 182                         *port-- = ports[--numports];
 183                         continue;
 184                 }
 185                 inb(_RESET);    /* begin resetting card */
 186
 187                 BUGMSG2(D_INIT_REASONS, "\n");
 188                 BUGMSG2(D_INIT_REASONS, "S1: ");
 189                 BUGLVL(D_INIT_REASONS) numprint = 0;
 190         }
 191         BUGMSG2(D_INIT, "\n");
 192
 193         if (!numports) {
 194                 BUGMSG2(D_NORMAL, "S1: No ARCnet cards found.\n");
 195                 kfree(shmems);
 196                 kfree(iomem);
 197                 return;
 198         }
 199         /* Stage 2: we have now reset any possible ARCnet cards, so we can't
 200          * do anything until they finish.  If D_INIT, print the list of
 201          * cards that are left.
 202          */
 203         numprint = -1;
 204         for (port = &ports[0]; port < ports + numports; port++) {
 205                 numprint++;
 206                 numprint %= 8;
 207                 if (!numprint) {
 208                         BUGMSG2(D_INIT, "\n");
 209                         BUGMSG2(D_INIT, "S2: ");
 210                 }
 211                 BUGMSG2(D_INIT, "%Xh ", *port);
 212         }
 213         BUGMSG2(D_INIT, "\n");
 214         mdelay(RESETtime);
 215
 216         /* Stage 3: abandon any shmem addresses that don't have the signature
 217          * 0xD1 byte in the right place, or are read-only.
 218          */
 219         numprint = -1;
 220         for (index = 0, p = &shmems[0]; index < numshmems; p++, index++) {
 221                 void __iomem *base;
 222
 223                 numprint++;
 224                 numprint %= 8;
 225                 if (!numprint) {
 226                         BUGMSG2(D_INIT, "\n");
 227                         BUGMSG2(D_INIT, "S3: ");
 228                 }
 229                 BUGMSG2(D_INIT, "%lXh ", *p);
 230
 231                 if (!request_mem_region(*p, MIRROR_SIZE, "arcnet (90xx)")) {
 232                         BUGMSG2(D_INIT_REASONS, "(request_mem_region)\n");
 233                         BUGMSG2(D_INIT_REASONS, "Stage 3: ");
 234                         BUGLVL(D_INIT_REASONS) numprint = 0;
 235                         goto out;
 236                 }
 237                 base = ioremap(*p, MIRROR_SIZE);
 238                 if (!base) {
 239                         BUGMSG2(D_INIT_REASONS, "(ioremap)\n");
 240                         BUGMSG2(D_INIT_REASONS, "Stage 3: ");
 241                         BUGLVL(D_INIT_REASONS) numprint = 0;
 242                         goto out1;
 243                 }
 244                 if (readb(base) != TESTvalue) {
 245                         BUGMSG2(D_INIT_REASONS, "(%02Xh != %02Xh)\n",
 246                                 readb(base), TESTvalue);
 247                         BUGMSG2(D_INIT_REASONS, "S3: ");
 248                         BUGLVL(D_INIT_REASONS) numprint = 0;
 249                         goto out2;
 250                 }
 251                 /* By writing 0x42 to the TESTvalue location, we also make
 252                  * sure no "mirror" shmem areas show up - if they occur
 253                  * in another pass through this loop, they will be discarded
 254                  * because *cptr != TESTvalue.
 255                  */
 256                 writeb(0x42, base);
 257                 if (readb(base) != 0x42) {
 258                         BUGMSG2(D_INIT_REASONS, "(read only)\n");
 259                         BUGMSG2(D_INIT_REASONS, "S3: ");
 260                         goto out2;
 261                 }
 262                 BUGMSG2(D_INIT_REASONS, "\n");
 263                 BUGMSG2(D_INIT_REASONS, "S3: ");
 264                 BUGLVL(D_INIT_REASONS) numprint = 0;
 265                 iomem[index] = base;
 266                 continue;
 267         out2:
 268                 iounmap(base);
 269         out1:
 270                 release_mem_region(*p, MIRROR_SIZE);
 271         out:
 272                 *p-- = shmems[--numshmems];
 273                 index--;
 274         }
 275         BUGMSG2(D_INIT, "\n");
 276
 277         if (!numshmems) {
 278                 BUGMSG2(D_NORMAL, "S3: No ARCnet cards found.\n");
 279                 for (port = &ports[0]; port < ports + numports; port++)
 280                         release_region(*port, ARCNET_TOTAL_SIZE);
 281                 kfree(shmems);
 282                 kfree(iomem);
 283                 return;
 284         }
 285         /* Stage 4: something of a dummy, to report the shmems that are
 286          * still possible after stage 3.
 287          */
 288         numprint = -1;
 289         for (p = &shmems[0]; p < shmems + numshmems; p++) {
 290                 numprint++;
 291                 numprint %= 8;
 292                 if (!numprint) {
 293                         BUGMSG2(D_INIT, "\n");
 294                         BUGMSG2(D_INIT, "S4: ");
 295                 }
 296                 BUGMSG2(D_INIT, "%lXh ", *p);
 297         }
 298         BUGMSG2(D_INIT, "\n");
 299
 300         /* Stage 5: for any ports that have the correct status, can disable
 301          * the RESET flag, and (if no irq is given) generate an autoirq,
 302          * register an ARCnet device.
 303          *
 304          * Currently, we can only register one device per probe, so quit
 305          * after the first one is found.
 306          */
 307         numprint = -1;
 308         for (port = &ports[0]; port < ports + numports; port++) {
 309                 int found = 0;
 310                 numprint++;
 311                 numprint %= 8;
 312                 if (!numprint) {
 313                         BUGMSG2(D_INIT, "\n");
 314                         BUGMSG2(D_INIT, "S5: ");
 315                 }
 316                 BUGMSG2(D_INIT, "%Xh ", *port);
 317
 318                 ioaddr = *port;
 319                 status = ASTATUS();
 320
 321                 if ((status & 0x9D)
 322                     != (NORXflag | RECONflag | TXFREEflag | RESETflag)) {
 323                         BUGMSG2(D_INIT_REASONS, "(status=%Xh)\n", status);
 324                         BUGMSG2(D_INIT_REASONS, "S5: ");
 325                         BUGLVL(D_INIT_REASONS) numprint = 0;
 326                         release_region(*port, ARCNET_TOTAL_SIZE);
 327                         *port-- = ports[--numports];
 328                         continue;
 329                 }
 330                 ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear);
 331                 status = ASTATUS();
 332                 if (status & RESETflag) {
 333                         BUGMSG2(D_INIT_REASONS, " (eternal reset, status=%Xh)\n",
 334                                 status);
 335                         BUGMSG2(D_INIT_REASONS, "S5: ");
 336                         BUGLVL(D_INIT_REASONS) numprint = 0;
 337                         release_region(*port, ARCNET_TOTAL_SIZE);
 338                         *port-- = ports[--numports];
 339                         continue;
 340                 }
 341                 /* skip this completely if an IRQ was given, because maybe
 342                  * we're on a machine that locks during autoirq!
 343                  */
 344                 if (!irq) {
 345                         /* if we do this, we're sure to get an IRQ since the
 346                          * card has just reset and the NORXflag is on until
 347                          * we tell it to start receiving.
 348                          */
 349                         airqmask = probe_irq_on();
 350                         AINTMASK(NORXflag);
 351                         udelay(1);
 352                         AINTMASK(0);
 353                         airq = probe_irq_off(airqmask);
 354
 355                         if (airq <= 0) {
 356                                 BUGMSG2(D_INIT_REASONS, "(airq=%d)\n", airq);
 357                                 BUGMSG2(D_INIT_REASONS, "S5: ");
 358                                 BUGLVL(D_INIT_REASONS) numprint = 0;
 359                                 release_region(*port, ARCNET_TOTAL_SIZE);
 360                                 *port-- = ports[--numports];
 361                                 continue;
 362                         }
 363                 } else {
 364                         airq = irq;
 365                 }
 366
 367                 BUGMSG2(D_INIT, "(%d,", airq);
 368                 openparen = 1;
 369
 370                 /* Everything seems okay.  But which shmem, if any, puts
 371                  * back its signature byte when the card is reset?
 372                  *
 373                  * If there are multiple cards installed, there might be
 374                  * multiple shmems still in the list.
 375                  */
 376 #ifdef FAST_PROBE
 377                 if (numports > 1 || numshmems > 1) {
 378                         inb(_RESET);
 379                         mdelay(RESETtime);
 380                 } else {
 381                         /* just one shmem and port, assume they match */
 382                         writeb(TESTvalue, iomem[0]);
 383                 }
 384 #else
 385                 inb(_RESET);
 386                 mdelay(RESETtime);
 387 #endif
 388
 389                 for (index = 0; index < numshmems; index++) {
 390                         u_long ptr = shmems[index];
 391                         void __iomem *base = iomem[index];
 392
 393                         if (readb(base) == TESTvalue) { /* found one */
 394                                 BUGMSG2(D_INIT, "%lXh)\n", *p);
 395                                 openparen = 0;
 396
 397                                 /* register the card */
 398                                 if (com90xx_found(*port, airq, ptr, base) == 0)
 399                                         found = 1;
 400                                 numprint = -1;
 401
 402                                 /* remove shmem from the list */
 403                                 shmems[index] = shmems[--numshmems];
 404                                 iomem[index] = iomem[numshmems];
 405                                 break;  /* go to the next I/O port */
 406                         } else {
 407                                 BUGMSG2(D_INIT_REASONS, "%Xh-", readb(base));
 408                         }
 409                 }
 410
 411                 if (openparen) {
 412                         BUGLVL(D_INIT) printk("no matching shmem)\n");
 413                         BUGLVL(D_INIT_REASONS) printk("S5: ");
 414                         BUGLVL(D_INIT_REASONS) numprint = 0;
 415                 }
 416                 if (!found)
 417                         release_region(*port, ARCNET_TOTAL_SIZE);
 418                 *port-- = ports[--numports];
 419         }
 420
 421         BUGLVL(D_INIT_REASONS) printk("\n");
 422
 423         /* Now put back TESTvalue on all leftover shmems. */
 424         for (index = 0; index < numshmems; index++) {
 425                 writeb(TESTvalue, iomem[index]);
 426                 iounmap(iomem[index]);
 427                 release_mem_region(shmems[index], MIRROR_SIZE);
 428         }
 429         kfree(shmems);
 430         kfree(iomem);
 431 }
 432
 433 static int check_mirror(unsigned long addr, size_t size)
 434 {
 435         void __iomem *p;
 436         int res = -1;
 437
 438         if (!request_mem_region(addr, size, "arcnet (90xx)"))
 439                 return -1;
 440
 441         p = ioremap(addr, size);
 442         if (p) {
 443                 if (readb(p) == TESTvalue)
 444                         res = 1;
 445                 else
 446                         res = 0;
 447                 iounmap(p);
 448         }
 449
 450         release_mem_region(addr, size);
 451         return res;
 452 }
 453
 454 /* Set up the struct net_device associated with this card.  Called after
 455  * probing succeeds.
 456  */
 457 static int __init com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *p)
 458 {
 459         struct net_device *dev = NULL;
 460         struct arcnet_local *lp;
 461         u_long first_mirror, last_mirror;
 462         int mirror_size;
 463
 464         /* allocate struct net_device */
 465         dev = alloc_arcdev(device);
 466         if (!dev) {
 467                 BUGMSG2(D_NORMAL, "com90xx: Can't allocate device!\n");
 468                 iounmap(p);
 469                 release_mem_region(shmem, MIRROR_SIZE);
 470                 return -ENOMEM;
 471         }
 472         lp = netdev_priv(dev);
 473         /* find the real shared memory start/end points, including mirrors */
 474
 475         /* guess the actual size of one "memory mirror" - the number of
 476          * bytes between copies of the shared memory.  On most cards, it's
 477          * 2k (or there are no mirrors at all) but on some, it's 4k.
 478          */
 479         mirror_size = MIRROR_SIZE;
 480         if (readb(p) == TESTvalue &&
 481             check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
 482             check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
 483                 mirror_size = 2 * MIRROR_SIZE;
 484
 485         first_mirror = shmem - mirror_size;
 486         while (check_mirror(first_mirror, mirror_size) == 1)
 487                 first_mirror -= mirror_size;
 488         first_mirror += mirror_size;
 489
 490         last_mirror = shmem + mirror_size;
 491         while (check_mirror(last_mirror, mirror_size) == 1)
 492                 last_mirror += mirror_size;
 493         last_mirror -= mirror_size;
 494
 495         dev->mem_start = first_mirror;
 496         dev->mem_end = last_mirror + MIRROR_SIZE - 1;
 497
 498         iounmap(p);
 499         release_mem_region(shmem, MIRROR_SIZE);
 500
 501         if (!request_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1, "arcnet (90xx)"))
 502                 goto err_free_dev;
 503
 504         /* reserve the irq */
 505         if (request_irq(airq, arcnet_interrupt, 0, "arcnet (90xx)", dev)) {
 506                 BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", airq);
 507                 goto err_release_mem;
 508         }
 509         dev->irq = airq;
 510
 511         /* Initialize the rest of the device structure. */
 512         lp->card_name = "COM90xx";
 513         lp->hw.command = com90xx_command;
 514         lp->hw.status = com90xx_status;
 515         lp->hw.intmask = com90xx_setmask;
 516         lp->hw.reset = com90xx_reset;
 517         lp->hw.owner = THIS_MODULE;
 518         lp->hw.copy_to_card = com90xx_copy_to_card;
 519         lp->hw.copy_from_card = com90xx_copy_from_card;
 520         lp->mem_start = ioremap(dev->mem_start, dev->mem_end - dev->mem_start + 1);
 521         if (!lp->mem_start) {
 522                 BUGMSG(D_NORMAL, "Can't remap device memory!\n");
 523                 goto err_free_irq;
 524         }
 525
 526         /* get and check the station ID from offset 1 in shmem */
 527         dev->dev_addr[0] = readb(lp->mem_start + 1);
 528
 529         dev->base_addr = ioaddr;
 530
 531         BUGMSG(D_NORMAL, "COM90xx station %02Xh found at %03lXh, IRQ %d, "
 532                "ShMem %lXh (%ld*%xh).\n",
 533                dev->dev_addr[0],
 534                dev->base_addr, dev->irq, dev->mem_start,
 535          (dev->mem_end - dev->mem_start + 1) / mirror_size, mirror_size);
 536
 537         if (register_netdev(dev))
 538                 goto err_unmap;
 539
 540         cards[numcards++] = dev;
 541         return 0;
 542
 543 err_unmap:
 544         iounmap(lp->mem_start);
 545 err_free_irq:
 546         free_irq(dev->irq, dev);
 547 err_release_mem:
 548         release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
 549 err_free_dev:
 550         free_netdev(dev);
 551         return -EIO;
 552 }
 553
 554
 555 static void com90xx_command(struct net_device *dev, int cmd)
 556 {
 557         short ioaddr = dev->base_addr;
 558
 559         ACOMMAND(cmd);
 560 }
 561
 562
 563 static int com90xx_status(struct net_device *dev)
 564 {
 565         short ioaddr = dev->base_addr;
 566
 567         return ASTATUS();
 568 }
 569
 570
 571 static void com90xx_setmask(struct net_device *dev, int mask)
 572 {
 573         short ioaddr = dev->base_addr;
 574
 575         AINTMASK(mask);
 576 }
 577
 578
 579 /*
 580  * Do a hardware reset on the card, and set up necessary registers.
 581  *
 582  * This should be called as little as possible, because it disrupts the
 583  * token on the network (causes a RECON) and requires a significant delay.
 584  *
 585  * However, it does make sure the card is in a defined state.
 586  */
 587 static int com90xx_reset(struct net_device *dev, int really_reset)
 588 {
 589         struct arcnet_local *lp = netdev_priv(dev);
 590         short ioaddr = dev->base_addr;
 591
 592         BUGMSG(D_INIT, "Resetting (status=%02Xh)\n", ASTATUS());
 593
 594         if (really_reset) {
 595                 /* reset the card */
 596                 inb(_RESET);
 597                 mdelay(RESETtime);
 598         }
 599         ACOMMAND(CFLAGScmd | RESETclear);       /* clear flags & end reset */
 600         ACOMMAND(CFLAGScmd | CONFIGclear);
 601
 602         /* don't do this until we verify that it doesn't hurt older cards! */
 603         /* outb(inb(_CONFIG) | ENABLE16flag, _CONFIG); */
 604
 605         /* verify that the ARCnet signature byte is present */
 606         if (readb(lp->mem_start) != TESTvalue) {
 607                 if (really_reset)
 608                         BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n");
 609                 return 1;
 610         }
 611         /* enable extended (512-byte) packets */
 612         ACOMMAND(CONFIGcmd | EXTconf);
 613
 614         /* clean out all the memory to make debugging make more sense :) */
 615         BUGLVL(D_DURING)
 616             memset_io(lp->mem_start, 0x42, 2048);
 617
 618         /* done!  return success. */
 619         return 0;
 620 }
 621
 622 static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset,
 623                                  void *buf, int count)
 624 {
 625         struct arcnet_local *lp = netdev_priv(dev);
 626         void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset;
 627         TIME("memcpy_toio", count, memcpy_toio(memaddr, buf, count));
 628 }
 629
 630
 631 static void com90xx_copy_from_card(struct net_device *dev, int bufnum, int offset,
 632                                    void *buf, int count)
 633 {
 634         struct arcnet_local *lp = netdev_priv(dev);
 635         void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset;
 636         TIME("memcpy_fromio", count, memcpy_fromio(buf, memaddr, count));
 637 }
 638
 639
 640 MODULE_LICENSE("GPL");
 641
 642 static int __init com90xx_init(void)
 643 {
 644         if (irq == 2)
 645                 irq = 9;
 646         com90xx_probe();
 647         if (!numcards)
 648                 return -EIO;
 649         return 0;
 650 }
 651
 652 static void __exit com90xx_exit(void)
 653 {
 654         struct net_device *dev;
 655         struct arcnet_local *lp;
 656         int count;
 657
 658         for (count = 0; count < numcards; count++) {
 659                 dev = cards[count];
 660                 lp = netdev_priv(dev);
 661
 662                 unregister_netdev(dev);
 663                 free_irq(dev->irq, dev);
 664                 iounmap(lp->mem_start);
 665                 release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
 666                 release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
 667                 free_netdev(dev);
 668         }
 669 }
 670
 671 module_init(com90xx_init);
 672 module_exit(com90xx_exit);
 673
 674 #ifndef MODULE
 675 static int __init com90xx_setup(char *s)
 676 {
 677         int ints[8];
 678
 679         s = get_options(s, 8, ints);
 680         if (!ints[0] && !*s) {
 681                 printk("com90xx: Disabled.\n");
 682                 return 1;
 683         }
 684
 685         switch (ints[0]) {
 686         default:                /* ERROR */
 687                 printk("com90xx: Too many arguments.\n");
 688         case 3:         /* Mem address */
 689                 shmem = ints[3];
 690         case 2:         /* IRQ */
 691                 irq = ints[2];
 692         case 1:         /* IO address */
 693                 io = ints[1];
 694         }
 695
 696         if (*s)
 697                 snprintf(device, sizeof(device), "%s", s);
 698
 699         return 1;
 700 }
 701
 702 __setup("com90xx=", com90xx_setup);
 703 #endif