drivers/net/mac89x0.c

   1 /* mac89x0.c: A Crystal Semiconductor CS89[02]0 driver for linux. */
   2 /*
   3         Written 1996 by Russell Nelson, with reference to skeleton.c
   4         written 1993-1994 by Donald Becker.
   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         The author may be reached at nelson@crynwr.com, Crynwr
  10         Software, 11 Grant St., Potsdam, NY 13676
  11
  12   Changelog:
  13
  14   Mike Cruse        : mcruse@cti-ltd.com
  15                     : Changes for Linux 2.0 compatibility.
  16                     : Added dev_id parameter in net_interrupt(),
  17                     : request_irq() and free_irq(). Just NULL for now.
  18
  19   Mike Cruse        : Added MOD_INC_USE_COUNT and MOD_DEC_USE_COUNT macros
  20                     : in net_open() and net_close() so kerneld would know
  21                     : that the module is in use and wouldn't eject the
  22                     : driver prematurely.
  23
  24   Mike Cruse        : Rewrote init_module() and cleanup_module using 8390.c
  25                     : as an example. Disabled autoprobing in init_module(),
  26                     : not a good thing to do to other devices while Linux
  27                     : is running from all accounts.
  28
  29   Alan Cox          : Removed 1.2 support, added 2.1 extra counters.
  30
  31   David Huggins-Daines <dhd@debian.org>
  32
  33   Split this off into mac89x0.c, and gutted it of all parts which are
  34   not relevant to the existing CS8900 cards on the Macintosh
  35   (i.e. basically the Daynaport CS and LC cards).  To be precise:
  36
  37     * Removed all the media-detection stuff, because these cards are
  38     TP-only.
  39
  40     * Lobotomized the ISA interrupt bogosity, because these cards use
  41     a hardwired NuBus interrupt and a magic ISAIRQ value in the card.
  42
  43     * Basically eliminated everything not relevant to getting the
  44     cards minimally functioning on the Macintosh.
  45
  46   I might add that these cards are badly designed even from the Mac
  47   standpoint, in that Dayna, in their infinite wisdom, used NuBus slot
  48   I/O space and NuBus interrupts for these cards, but neglected to
  49   provide anything even remotely resembling a NuBus ROM.  Therefore we
  50   have to probe for them in a brain-damaged ISA-like fashion.
  51
  52   Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 11/01/2001
  53   check kmalloc and release the allocated memory on failure in
  54   mac89x0_probe and in init_module
  55   use local_irq_{save,restore}(flags) in net_get_stat, not just
  56   local_irq_{dis,en}able()
  57 */
  58
  59 static char *version =
  60 "cs89x0.c:v1.02 11/26/96 Russell Nelson <nelson@crynwr.com>\n";
  61
  62 /* ======================= configure the driver here ======================= */
  63
  64 /* use 0 for production, 1 for verification, >2 for debug */
  65 #ifndef NET_DEBUG
  66 #define NET_DEBUG 0
  67 #endif
  68
  69 /* ======================= end of configuration ======================= */
  70
  71
  72 /* Always include 'config.h' first in case the user wants to turn on
  73    or override something. */
  74 #include <linux/module.h>
  75
  76 /*
  77   Sources:
  78
  79         Crynwr packet driver epktisa.
  80
  81         Crystal Semiconductor data sheets.
  82
  83 */
  84
  85 #include <linux/kernel.h>
  86 #include <linux/types.h>
  87 #include <linux/fcntl.h>
  88 #include <linux/interrupt.h>
  89 #include <linux/ioport.h>
  90 #include <linux/in.h>
  91 #include <linux/string.h>
  92 #include <linux/nubus.h>
  93 #include <linux/errno.h>
  94 #include <linux/init.h>
  95 #include <linux/netdevice.h>
  96 #include <linux/etherdevice.h>
  97 #include <linux/skbuff.h>
  98 #include <linux/delay.h>
  99 #include <linux/bitops.h>
 100 #include <linux/gfp.h>
 101
 102 #include <asm/system.h>
 103 #include <asm/io.h>
 104 #include <asm/hwtest.h>
 105 #include <asm/macints.h>
 106
 107 #include "cs89x0.h"
 108
 109 static unsigned int net_debug = NET_DEBUG;
 110
 111 /* Information that need to be kept for each board. */
 112 struct net_local {
 113         int chip_type;          /* one of: CS8900, CS8920, CS8920M */
 114         char chip_revision;     /* revision letter of the chip ('A'...) */
 115         int send_cmd;           /* the propercommand used to send a packet. */
 116         int rx_mode;
 117         int curr_rx_cfg;
 118         int send_underrun;      /* keep track of how many underruns in a row we get */
 119         struct sk_buff *skb;
 120 };
 121
 122 /* Index to functions, as function prototypes. */
 123
 124 #if 0
 125 extern void reset_chip(struct net_device *dev);
 126 #endif
 127 static int net_open(struct net_device *dev);
 128 static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
 129 static irqreturn_t net_interrupt(int irq, void *dev_id);
 130 static void set_multicast_list(struct net_device *dev);
 131 static void net_rx(struct net_device *dev);
 132 static int net_close(struct net_device *dev);
 133 static struct net_device_stats *net_get_stats(struct net_device *dev);
 134 static int set_mac_address(struct net_device *dev, void *addr);
 135
 136
 137 /* Example routines you must write ;->. */
 138 #define tx_done(dev) 1
 139
 140 /* For reading/writing registers ISA-style */
 141 static inline int
 142 readreg_io(struct net_device *dev, int portno)
 143 {
 144         nubus_writew(swab16(portno), dev->base_addr + ADD_PORT);
 145         return swab16(nubus_readw(dev->base_addr + DATA_PORT));
 146 }
 147
 148 static inline void
 149 writereg_io(struct net_device *dev, int portno, int value)
 150 {
 151         nubus_writew(swab16(portno), dev->base_addr + ADD_PORT);
 152         nubus_writew(swab16(value), dev->base_addr + DATA_PORT);
 153 }
 154
 155 /* These are for reading/writing registers in shared memory */
 156 static inline int
 157 readreg(struct net_device *dev, int portno)
 158 {
 159         return swab16(nubus_readw(dev->mem_start + portno));
 160 }
 161
 162 static inline void
 163 writereg(struct net_device *dev, int portno, int value)
 164 {
 165         nubus_writew(swab16(value), dev->mem_start + portno);
 166 }
 167
 168 static const struct net_device_ops mac89x0_netdev_ops = {
 169         .ndo_open               = net_open,
 170         .ndo_stop               = net_close,
 171         .ndo_start_xmit         = net_send_packet,
 172         .ndo_get_stats          = net_get_stats,
 173         .ndo_set_multicast_list = set_multicast_list,
 174         .ndo_set_mac_address    = set_mac_address,
 175         .ndo_validate_addr      = eth_validate_addr,
 176         .ndo_change_mtu         = eth_change_mtu,
 177 };
 178
 179 /* Probe for the CS8900 card in slot E.  We won't bother looking
 180    anywhere else until we have a really good reason to do so. */
 181 struct net_device * __init mac89x0_probe(int unit)
 182 {
 183         struct net_device *dev;
 184         static int once_is_enough;
 185         struct net_local *lp;
 186         static unsigned version_printed;
 187         int i, slot;
 188         unsigned rev_type = 0;
 189         unsigned long ioaddr;
 190         unsigned short sig;
 191         int err = -ENODEV;
 192
 193         if (!MACH_IS_MAC)
 194                 return ERR_PTR(-ENODEV);
 195
 196         dev = alloc_etherdev(sizeof(struct net_local));
 197         if (!dev)
 198                 return ERR_PTR(-ENOMEM);
 199
 200         if (unit >= 0) {
 201                 sprintf(dev->name, "eth%d", unit);
 202                 netdev_boot_setup_check(dev);
 203         }
 204
 205         if (once_is_enough)
 206                 goto out;
 207         once_is_enough = 1;
 208
 209         /* We might have to parameterize this later */
 210         slot = 0xE;
 211         /* Get out now if there's a real NuBus card in slot E */
 212         if (nubus_find_slot(slot, NULL) != NULL)
 213                 goto out;
 214
 215         /* The pseudo-ISA bits always live at offset 0x300 (gee,
 216            wonder why...) */
 217         ioaddr = (unsigned long)
 218                 nubus_slot_addr(slot) | (((slot&0xf) << 20) + DEFAULTIOBASE);
 219         {
 220                 unsigned long flags;
 221                 int card_present;
 222
 223                 local_irq_save(flags);
 224                 card_present = (hwreg_present((void*) ioaddr+4) &&
 225                                 hwreg_present((void*) ioaddr + DATA_PORT));
 226                 local_irq_restore(flags);
 227
 228                 if (!card_present)
 229                         goto out;
 230         }
 231
 232         nubus_writew(0, ioaddr + ADD_PORT);
 233         sig = nubus_readw(ioaddr + DATA_PORT);
 234         if (sig != swab16(CHIP_EISA_ID_SIG))
 235                 goto out;
 236
 237         /* Initialize the net_device structure. */
 238         lp = netdev_priv(dev);
 239
 240         /* Fill in the 'dev' fields. */
 241         dev->base_addr = ioaddr;
 242         dev->mem_start = (unsigned long)
 243                 nubus_slot_addr(slot) | (((slot&0xf) << 20) + MMIOBASE);
 244         dev->mem_end = dev->mem_start + 0x1000;
 245
 246         /* Turn on shared memory */
 247         writereg_io(dev, PP_BusCTL, MEMORY_ON);
 248
 249         /* get the chip type */
 250         rev_type = readreg(dev, PRODUCT_ID_ADD);
 251         lp->chip_type = rev_type &~ REVISON_BITS;
 252         lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
 253
 254         /* Check the chip type and revision in order to set the correct send command
 255         CS8920 revision C and CS8900 revision F can use the faster send. */
 256         lp->send_cmd = TX_AFTER_381;
 257         if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
 258                 lp->send_cmd = TX_NOW;
 259         if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
 260                 lp->send_cmd = TX_NOW;
 261
 262         if (net_debug && version_printed++ == 0)
 263                 printk(version);
 264
 265         printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#8lx",
 266                dev->name,
 267                lp->chip_type==CS8900?'0':'2',
 268                lp->chip_type==CS8920M?"M":"",
 269                lp->chip_revision,
 270                dev->base_addr);
 271
 272         /* Try to read the MAC address */
 273         if ((readreg(dev, PP_SelfST) & (EEPROM_PRESENT | EEPROM_OK)) == 0) {
 274                 printk("\nmac89x0: No EEPROM, giving up now.\n");
 275                 goto out1;
 276         } else {
 277                 for (i = 0; i < ETH_ALEN; i += 2) {
 278                         /* Big-endian (why??!) */
 279                         unsigned short s = readreg(dev, PP_IA + i);
 280                         dev->dev_addr[i] = s >> 8;
 281                         dev->dev_addr[i+1] = s & 0xff;
 282                 }
 283         }
 284
 285         dev->irq = SLOT2IRQ(slot);
 286
 287         /* print the IRQ and ethernet address. */
 288
 289         printk(" IRQ %d ADDR %pM\n", dev->irq, dev->dev_addr);
 290
 291         dev->netdev_ops         = &mac89x0_netdev_ops;
 292
 293         err = register_netdev(dev);
 294         if (err)
 295                 goto out1;
 296         return NULL;
 297 out1:
 298         nubus_writew(0, dev->base_addr + ADD_PORT);
 299 out:
 300         free_netdev(dev);
 301         return ERR_PTR(err);
 302 }
 303
 304 #if 0
 305 /* This is useful for something, but I don't know what yet. */
 306 void __init reset_chip(struct net_device *dev)
 307 {
 308         int reset_start_time;
 309
 310         writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
 311
 312         /* wait 30 ms */
 313         msleep_interruptible(30);
 314
 315         /* Wait until the chip is reset */
 316         reset_start_time = jiffies;
 317         while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
 318                 ;
 319 }
 320 #endif
 321
 322 /* Open/initialize the board.  This is called (in the current kernel)
 323    sometime after booting when the 'ifconfig' program is run.
 324
 325    This routine should set everything up anew at each open, even
 326    registers that "should" only need to be set once at boot, so that
 327    there is non-reboot way to recover if something goes wrong.
 328    */
 329 static int
 330 net_open(struct net_device *dev)
 331 {
 332         struct net_local *lp = netdev_priv(dev);
 333         int i;
 334
 335         /* Disable the interrupt for now */
 336         writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) & ~ENABLE_IRQ);
 337
 338         /* Grab the interrupt */
 339         if (request_irq(dev->irq, net_interrupt, 0, "cs89x0", dev))
 340                 return -EAGAIN;
 341
 342         /* Set up the IRQ - Apparently magic */
 343         if (lp->chip_type == CS8900)
 344                 writereg(dev, PP_CS8900_ISAINT, 0);
 345         else
 346                 writereg(dev, PP_CS8920_ISAINT, 0);
 347
 348         /* set the Ethernet address */
 349         for (i=0; i < ETH_ALEN/2; i++)
 350                 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
 351
 352         /* Turn on both receive and transmit operations */
 353         writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
 354
 355         /* Receive only error free packets addressed to this card */
 356         lp->rx_mode = 0;
 357         writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
 358
 359         lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
 360
 361         writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
 362
 363         writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
 364                TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
 365
 366         writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
 367                  TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
 368
 369         /* now that we've got our act together, enable everything */
 370         writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ);
 371         netif_start_queue(dev);
 372         return 0;
 373 }
 374
 375 static int
 376 net_send_packet(struct sk_buff *skb, struct net_device *dev)
 377 {
 378         struct net_local *lp = netdev_priv(dev);
 379         unsigned long flags;
 380
 381         if (net_debug > 3)
 382                 printk("%s: sent %d byte packet of type %x\n",
 383                        dev->name, skb->len,
 384                        (skb->data[ETH_ALEN+ETH_ALEN] << 8)
 385                        | skb->data[ETH_ALEN+ETH_ALEN+1]);
 386
 387         /* keep the upload from being interrupted, since we
 388            ask the chip to start transmitting before the
 389            whole packet has been completely uploaded. */
 390         local_irq_save(flags);
 391         netif_stop_queue(dev);
 392
 393         /* initiate a transmit sequence */
 394         writereg(dev, PP_TxCMD, lp->send_cmd);
 395         writereg(dev, PP_TxLength, skb->len);
 396
 397         /* Test to see if the chip has allocated memory for the packet */
 398         if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
 399                 /* Gasp!  It hasn't.  But that shouldn't happen since
 400                    we're waiting for TxOk, so return 1 and requeue this packet. */
 401                 local_irq_restore(flags);
 402                 return NETDEV_TX_BUSY;
 403         }
 404
 405         /* Write the contents of the packet */
 406         skb_copy_from_linear_data(skb, (void *)(dev->mem_start + PP_TxFrame),
 407                                   skb->len+1);
 408
 409         local_irq_restore(flags);
 410         dev_kfree_skb (skb);
 411
 412         return NETDEV_TX_OK;
 413 }
 414
 415 /* The typical workload of the driver:
 416    Handle the network interface interrupts. */
 417 static irqreturn_t net_interrupt(int irq, void *dev_id)
 418 {
 419         struct net_device *dev = dev_id;
 420         struct net_local *lp;
 421         int ioaddr, status;
 422
 423         if (dev == NULL) {
 424                 printk ("net_interrupt(): irq %d for unknown device.\n", irq);
 425                 return IRQ_NONE;
 426         }
 427
 428         ioaddr = dev->base_addr;
 429         lp = netdev_priv(dev);
 430
 431         /* we MUST read all the events out of the ISQ, otherwise we'll never
 432            get interrupted again.  As a consequence, we can't have any limit
 433            on the number of times we loop in the interrupt handler.  The
 434            hardware guarantees that eventually we'll run out of events.  Of
 435            course, if you're on a slow machine, and packets are arriving
 436            faster than you can read them off, you're screwed.  Hasta la
 437            vista, baby!  */
 438         while ((status = swab16(nubus_readw(dev->base_addr + ISQ_PORT)))) {
 439                 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
 440                 switch(status & ISQ_EVENT_MASK) {
 441                 case ISQ_RECEIVER_EVENT:
 442                         /* Got a packet(s). */
 443                         net_rx(dev);
 444                         break;
 445                 case ISQ_TRANSMITTER_EVENT:
 446                         dev->stats.tx_packets++;
 447                         netif_wake_queue(dev);
 448                         if ((status & TX_OK) == 0)
 449                                 dev->stats.tx_errors++;
 450                         if (status & TX_LOST_CRS)
 451                                 dev->stats.tx_carrier_errors++;
 452                         if (status & TX_SQE_ERROR)
 453                                 dev->stats.tx_heartbeat_errors++;
 454                         if (status & TX_LATE_COL)
 455                                 dev->stats.tx_window_errors++;
 456                         if (status & TX_16_COL)
 457                                 dev->stats.tx_aborted_errors++;
 458                         break;
 459                 case ISQ_BUFFER_EVENT:
 460                         if (status & READY_FOR_TX) {
 461                                 /* we tried to transmit a packet earlier,
 462                                    but inexplicably ran out of buffers.
 463                                    That shouldn't happen since we only ever
 464                                    load one packet.  Shrug.  Do the right
 465                                    thing anyway. */
 466                                 netif_wake_queue(dev);
 467                         }
 468                         if (status & TX_UNDERRUN) {
 469                                 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
 470                                 lp->send_underrun++;
 471                                 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
 472                                 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
 473                         }
 474                         break;
 475                 case ISQ_RX_MISS_EVENT:
 476                         dev->stats.rx_missed_errors += (status >> 6);
 477                         break;
 478                 case ISQ_TX_COL_EVENT:
 479                         dev->stats.collisions += (status >> 6);
 480                         break;
 481                 }
 482         }
 483         return IRQ_HANDLED;
 484 }
 485
 486 /* We have a good packet(s), get it/them out of the buffers. */
 487 static void
 488 net_rx(struct net_device *dev)
 489 {
 490         struct sk_buff *skb;
 491         int status, length;
 492
 493         status = readreg(dev, PP_RxStatus);
 494         if ((status & RX_OK) == 0) {
 495                 dev->stats.rx_errors++;
 496                 if (status & RX_RUNT)
 497                                 dev->stats.rx_length_errors++;
 498                 if (status & RX_EXTRA_DATA)
 499                                 dev->stats.rx_length_errors++;
 500                 if ((status & RX_CRC_ERROR) &&
 501                     !(status & (RX_EXTRA_DATA|RX_RUNT)))
 502                         /* per str 172 */
 503                         dev->stats.rx_crc_errors++;
 504                 if (status & RX_DRIBBLE)
 505                                 dev->stats.rx_frame_errors++;
 506                 return;
 507         }
 508
 509         length = readreg(dev, PP_RxLength);
 510         /* Malloc up new buffer. */
 511         skb = alloc_skb(length, GFP_ATOMIC);
 512         if (skb == NULL) {
 513                 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
 514                 dev->stats.rx_dropped++;
 515                 return;
 516         }
 517         skb_put(skb, length);
 518
 519         skb_copy_to_linear_data(skb, (void *)(dev->mem_start + PP_RxFrame),
 520                                 length);
 521
 522         if (net_debug > 3)printk("%s: received %d byte packet of type %x\n",
 523                                  dev->name, length,
 524                                  (skb->data[ETH_ALEN+ETH_ALEN] << 8)
 525                                  | skb->data[ETH_ALEN+ETH_ALEN+1]);
 526
 527         skb->protocol=eth_type_trans(skb,dev);
 528         netif_rx(skb);
 529         dev->stats.rx_packets++;
 530         dev->stats.rx_bytes += length;
 531 }
 532
 533 /* The inverse routine to net_open(). */
 534 static int
 535 net_close(struct net_device *dev)
 536 {
 537
 538         writereg(dev, PP_RxCFG, 0);
 539         writereg(dev, PP_TxCFG, 0);
 540         writereg(dev, PP_BufCFG, 0);
 541         writereg(dev, PP_BusCTL, 0);
 542
 543         netif_stop_queue(dev);
 544
 545         free_irq(dev->irq, dev);
 546
 547         /* Update the statistics here. */
 548
 549         return 0;
 550
 551 }
 552
 553 /* Get the current statistics.  This may be called with the card open or
 554    closed. */
 555 static struct net_device_stats *
 556 net_get_stats(struct net_device *dev)
 557 {
 558         unsigned long flags;
 559
 560         local_irq_save(flags);
 561         /* Update the statistics from the device registers. */
 562         dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
 563         dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
 564         local_irq_restore(flags);
 565
 566         return &dev->stats;
 567 }
 568
 569 static void set_multicast_list(struct net_device *dev)
 570 {
 571         struct net_local *lp = netdev_priv(dev);
 572
 573         if(dev->flags&IFF_PROMISC)
 574         {
 575                 lp->rx_mode = RX_ALL_ACCEPT;
 576         } else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) {
 577                 /* The multicast-accept list is initialized to accept-all, and we
 578                    rely on higher-level filtering for now. */
 579                 lp->rx_mode = RX_MULTCAST_ACCEPT;
 580         }
 581         else
 582                 lp->rx_mode = 0;
 583
 584         writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
 585
 586         /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
 587         writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
 588              (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
 589 }
 590
 591
 592 static int set_mac_address(struct net_device *dev, void *addr)
 593 {
 594         int i;
 595         printk("%s: Setting MAC address to ", dev->name);
 596         for (i = 0; i < 6; i++)
 597                 printk(" %2.2x", dev->dev_addr[i] = ((unsigned char *)addr)[i]);
 598         printk(".\n");
 599         /* set the Ethernet address */
 600         for (i=0; i < ETH_ALEN/2; i++)
 601                 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
 602
 603         return 0;
 604 }
 605
 606 #ifdef MODULE
 607
 608 static struct net_device *dev_cs89x0;
 609 static int debug;
 610
 611 module_param(debug, int, 0);
 612 MODULE_PARM_DESC(debug, "CS89[02]0 debug level (0-5)");
 613 MODULE_LICENSE("GPL");
 614
 615 int __init
 616 init_module(void)
 617 {
 618         net_debug = debug;
 619         dev_cs89x0 = mac89x0_probe(-1);
 620         if (IS_ERR(dev_cs89x0)) {
 621                 printk(KERN_WARNING "mac89x0.c: No card found\n");
 622                 return PTR_ERR(dev_cs89x0);
 623         }
 624         return 0;
 625 }
 626
 627 void
 628 cleanup_module(void)
 629 {
 630         unregister_netdev(dev_cs89x0);
 631         nubus_writew(0, dev_cs89x0->base_addr + ADD_PORT);
 632         free_netdev(dev_cs89x0);
 633 }
 634 #endif /* MODULE */