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