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