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 #define PRINTK(x) printk x
  77
  78 /*
  79   Sources:
  80
  81         Crynwr packet driver epktisa.
  82
  83         Crystal Semiconductor data sheets.
  84
  85 */
  86
  87 #include <linux/kernel.h>
  88 #include <linux/types.h>
  89 #include <linux/fcntl.h>
  90 #include <linux/interrupt.h>
  91 #include <linux/ioport.h>
  92 #include <linux/in.h>
  93 #include <linux/slab.h>
  94 #include <linux/string.h>
  95 #include <linux/nubus.h>
  96 #include <linux/errno.h>
  97 #include <linux/init.h>
  98 #include <linux/netdevice.h>
  99 #include <linux/etherdevice.h>
 100 #include <linux/skbuff.h>
 101
 102 #include <asm/system.h>
 103 #include <asm/bitops.h>
 104 #include <asm/io.h>
 105 #include <asm/hwtest.h>
 106 #include <asm/macints.h>
 107
 108 #include "cs89x0.h"
 109
 110 static unsigned int net_debug = NET_DEBUG;
 111
 112 /* Information that need to be kept for each board. */
 113 struct net_local {
 114         struct net_device_stats stats;
 115         int chip_type;          /* one of: CS8900, CS8920, CS8920M */
 116         char chip_revision;     /* revision letter of the chip ('A'...) */
 117         int send_cmd;           /* the propercommand used to send a packet. */
 118         int rx_mode;
 119         int curr_rx_cfg;
 120         int send_underrun;      /* keep track of how many underruns in a row we get */
 121         struct sk_buff *skb;
 122 };
 123
 124 /* Index to functions, as function prototypes. */
 125
 126 #if 0
 127 extern void reset_chip(struct net_device *dev);
 128 #endif
 129 static int net_open(struct net_device *dev);
 130 static int      net_send_packet(struct sk_buff *skb, struct net_device *dev);
 131 static irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 132 static void set_multicast_list(struct net_device *dev);
 133 static void net_rx(struct net_device *dev);
 134 static int net_close(struct net_device *dev);
 135 static struct net_device_stats *net_get_stats(struct net_device *dev);
 136 static int set_mac_address(struct net_device *dev, void *addr);
 137
 138
 139 /* Example routines you must write ;->. */
 140 #define tx_done(dev) 1
 141
 142 /* For reading/writing registers ISA-style */
 143 static inline int
 144 readreg_io(struct net_device *dev, int portno)
 145 {
 146         nubus_writew(swab16(portno), dev->base_addr + ADD_PORT);
 147         return swab16(nubus_readw(dev->base_addr + DATA_PORT));
 148 }
 149
 150 static inline void
 151 writereg_io(struct net_device *dev, int portno, int value)
 152 {
 153         nubus_writew(swab16(portno), dev->base_addr + ADD_PORT);
 154         nubus_writew(swab16(value), dev->base_addr + DATA_PORT);
 155 }
 156
 157 /* These are for reading/writing registers in shared memory */
 158 static inline int
 159 readreg(struct net_device *dev, int portno)
 160 {
 161         return swab16(nubus_readw(dev->mem_start + portno));
 162 }
 163
 164 static inline void
 165 writereg(struct net_device *dev, int portno, int value)
 166 {
 167         nubus_writew(swab16(value), dev->mem_start + portno);
 168 }
 169
 170 /* Probe for the CS8900 card in slot E.  We won't bother looking
 171    anywhere else until we have a really good reason to do so. */
 172 struct net_device * __init mac89x0_probe(int unit)
 173 {
 174         struct net_device *dev;
 175         static int once_is_enough;
 176         struct net_local *lp;
 177         static unsigned version_printed;
 178         int i, slot;
 179         unsigned rev_type = 0;
 180         unsigned long ioaddr;
 181         unsigned short sig;
 182         int err = -ENODEV;
 183
 184         dev = alloc_etherdev(sizeof(struct net_local));
 185         if (!dev)
 186                 return ERR_PTR(-ENOMEM);
 187
 188         if (unit >= 0) {
 189                 sprintf(dev->name, "eth%d", unit);
 190                 netdev_boot_setup_check(dev);
 191         }
 192
 193         SET_MODULE_OWNER(dev);
 194
 195         if (once_is_enough)
 196                 goto out;
 197         once_is_enough = 1;
 198
 199         /* We might have to parameterize this later */
 200         slot = 0xE;
 201         /* Get out now if there's a real NuBus card in slot E */
 202         if (nubus_find_slot(slot, NULL) != NULL)
 203                 goto out;
 204
 205         /* The pseudo-ISA bits always live at offset 0x300 (gee,
 206            wonder why...) */
 207         ioaddr = (unsigned long)
 208                 nubus_slot_addr(slot) | (((slot&0xf) << 20) + DEFAULTIOBASE);
 209         {
 210                 unsigned long flags;
 211                 int card_present;
 212
 213                 local_irq_save(flags);
 214                 card_present = hwreg_present((void*) ioaddr+4)
 215                   && hwreg_present((void*) ioaddr + DATA_PORT);
 216                 local_irq_restore(flags);
 217
 218                 if (!card_present)
 219                         goto out;
 220         }
 221
 222         nubus_writew(0, ioaddr + ADD_PORT);
 223         sig = nubus_readw(ioaddr + DATA_PORT);
 224         if (sig != swab16(CHIP_EISA_ID_SIG))
 225                 goto out;
 226
 227         /* Initialize the net_device structure. */
 228         lp = netdev_priv(dev);
 229
 230         /* Fill in the 'dev' fields. */
 231         dev->base_addr = ioaddr;
 232         dev->mem_start = (unsigned long)
 233                 nubus_slot_addr(slot) | (((slot&0xf) << 20) + MMIOBASE);
 234         dev->mem_end = dev->mem_start + 0x1000;
 235
 236         /* Turn on shared memory */
 237         writereg_io(dev, PP_BusCTL, MEMORY_ON);
 238
 239         /* get the chip type */
 240         rev_type = readreg(dev, PRODUCT_ID_ADD);
 241         lp->chip_type = rev_type &~ REVISON_BITS;
 242         lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
 243
 244         /* Check the chip type and revision in order to set the correct send command
 245         CS8920 revision C and CS8900 revision F can use the faster send. */
 246         lp->send_cmd = TX_AFTER_381;
 247         if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
 248                 lp->send_cmd = TX_NOW;
 249         if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
 250                 lp->send_cmd = TX_NOW;
 251
 252         if (net_debug && version_printed++ == 0)
 253                 printk(version);
 254
 255         printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#8lx",
 256                dev->name,
 257                lp->chip_type==CS8900?'0':'2',
 258                lp->chip_type==CS8920M?"M":"",
 259                lp->chip_revision,
 260                dev->base_addr);
 261
 262         /* Try to read the MAC address */
 263         if ((readreg(dev, PP_SelfST) & (EEPROM_PRESENT | EEPROM_OK)) == 0) {
 264                 printk("\nmac89x0: No EEPROM, giving up now.\n");
 265                 goto out1;
 266         } else {
 267                 for (i = 0; i < ETH_ALEN; i += 2) {
 268                         /* Big-endian (why??!) */
 269                         unsigned short s = readreg(dev, PP_IA + i);
 270                         dev->dev_addr[i] = s >> 8;
 271                         dev->dev_addr[i+1] = s & 0xff;
 272                 }
 273         }
 274
 275         dev->irq = SLOT2IRQ(slot);
 276         printk(" IRQ %d ADDR ", dev->irq);
 277
 278         /* print the ethernet address. */
 279         for (i = 0; i < ETH_ALEN; i++)
 280                 printk("%2.2x%s", dev->dev_addr[i],
 281                        ((i < ETH_ALEN-1) ? ":" : ""));
 282         printk("\n");
 283
 284         dev->open               = net_open;
 285         dev->stop               = net_close;
 286         dev->hard_start_xmit = net_send_packet;
 287         dev->get_stats  = net_get_stats;
 288         dev->set_multicast_list = &set_multicast_list;
 289         dev->set_mac_address = &set_mac_address;
 290
 291         err = register_netdev(dev);
 292         if (err)
 293                 goto out1;
 294         return 0;
 295 out1:
 296         nubus_writew(0, dev->base_addr + ADD_PORT);
 297 out:
 298         free_netdev(dev);
 299         return ERR_PTR(err);
 300 }
 301
 302 #if 0
 303 /* This is useful for something, but I don't know what yet. */
 304 void __init reset_chip(struct net_device *dev)
 305 {
 306         int reset_start_time;
 307
 308         writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
 309
 310         /* wait 30 ms */
 311         current->state = TASK_INTERRUPTIBLE;
 312         schedule_timeout(30*HZ/1000);
 313
 314         /* Wait until the chip is reset */
 315         reset_start_time = jiffies;
 316         while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
 317                 ;
 318 }
 319 #endif
 320
 321 /* Open/initialize the board.  This is called (in the current kernel)
 322    sometime after booting when the 'ifconfig' program is run.
 323
 324    This routine should set everything up anew at each open, even
 325    registers that "should" only need to be set once at boot, so that
 326    there is non-reboot way to recover if something goes wrong.
 327    */
 328 static int
 329 net_open(struct net_device *dev)
 330 {
 331         struct net_local *lp = netdev_priv(dev);
 332         int i;
 333
 334         /* Disable the interrupt for now */
 335         writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) & ~ENABLE_IRQ);
 336
 337         /* Grab the interrupt */
 338         if (request_irq(dev->irq, &net_interrupt, 0, "cs89x0", dev))
 339                 return -EAGAIN;
 340
 341         /* Set up the IRQ - Apparently magic */
 342         if (lp->chip_type == CS8900)
 343                 writereg(dev, PP_CS8900_ISAINT, 0);
 344         else
 345                 writereg(dev, PP_CS8920_ISAINT, 0);
 346
 347         /* set the Ethernet address */
 348         for (i=0; i < ETH_ALEN/2; i++)
 349                 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
 350
 351         /* Turn on both receive and transmit operations */
 352         writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
 353
 354         /* Receive only error free packets addressed to this card */
 355         lp->rx_mode = 0;
 356         writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
 357
 358         lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
 359
 360         writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
 361
 362         writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
 363                TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
 364
 365         writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
 366                  TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
 367
 368         /* now that we've got our act together, enable everything */
 369         writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ);
 370         netif_start_queue(dev);
 371         return 0;
 372 }
 373
 374 static int
 375 net_send_packet(struct sk_buff *skb, struct net_device *dev)
 376 {
 377         if (dev->tbusy) {
 378                 /* If we get here, some higher level has decided we are broken.
 379                    There should really be a "kick me" function call instead. */
 380                 int tickssofar = jiffies - dev->trans_start;
 381                 if (tickssofar < 5)
 382                         return 1;
 383                 if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
 384                            tx_done(dev) ? "IRQ conflict" : "network cable problem");
 385                 /* Try to restart the adaptor. */
 386                 dev->tbusy=0;
 387                 dev->trans_start = jiffies;
 388         }
 389
 390         /* Block a timer-based transmit from overlapping.  This could better be
 391            done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
 392         if (test_and_set_bit(0, (void*)&dev->tbusy) != 0)
 393                 printk("%s: Transmitter access conflict.\n", dev->name);
 394         else {
 395                 struct net_local *lp = netdev_priv(dev);
 396                 unsigned long flags;
 397
 398                 if (net_debug > 3)
 399                         printk("%s: sent %d byte packet of type %x\n",
 400                                dev->name, skb->len,
 401                                (skb->data[ETH_ALEN+ETH_ALEN] << 8)
 402                                | skb->data[ETH_ALEN+ETH_ALEN+1]);
 403
 404                 /* keep the upload from being interrupted, since we
 405                    ask the chip to start transmitting before the
 406                    whole packet has been completely uploaded. */
 407                 local_irq_save(flags);
 408
 409                 /* initiate a transmit sequence */
 410                 writereg(dev, PP_TxCMD, lp->send_cmd);
 411                 writereg(dev, PP_TxLength, skb->len);
 412
 413                 /* Test to see if the chip has allocated memory for the packet */
 414                 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
 415                         /* Gasp!  It hasn't.  But that shouldn't happen since
 416                            we're waiting for TxOk, so return 1 and requeue this packet. */
 417                         local_irq_restore(flags);
 418                         return 1;
 419                 }
 420
 421                 /* Write the contents of the packet */
 422                 memcpy_toio(dev->mem_start + PP_TxFrame, skb->data, skb->len+1);
 423
 424                 local_irq_restore(flags);
 425                 dev->trans_start = jiffies;
 426         }
 427         dev_kfree_skb (skb);
 428
 429         return 0;
 430 }
 431 \f
 432 /* The typical workload of the driver:
 433    Handle the network interface interrupts. */
 434 static irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs * regs)
 435 {
 436         struct net_device *dev = dev_id;
 437         struct net_local *lp;
 438         int ioaddr, status;
 439
 440         if (dev == NULL) {
 441                 printk ("net_interrupt(): irq %d for unknown device.\n", irq);
 442                 return IRQ_NONE;
 443         }
 444         if (dev->interrupt)
 445                 printk("%s: Re-entering the interrupt handler.\n", dev->name);
 446         dev->interrupt = 1;
 447
 448         ioaddr = dev->base_addr;
 449         lp = netdev_priv(dev);
 450
 451         /* we MUST read all the events out of the ISQ, otherwise we'll never
 452            get interrupted again.  As a consequence, we can't have any limit
 453            on the number of times we loop in the interrupt handler.  The
 454            hardware guarantees that eventually we'll run out of events.  Of
 455            course, if you're on a slow machine, and packets are arriving
 456            faster than you can read them off, you're screwed.  Hasta la
 457            vista, baby!  */
 458         while ((status = swab16(nubus_readw(dev->base_addr + ISQ_PORT)))) {
 459                 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
 460                 switch(status & ISQ_EVENT_MASK) {
 461                 case ISQ_RECEIVER_EVENT:
 462                         /* Got a packet(s). */
 463                         net_rx(dev);
 464                         break;
 465                 case ISQ_TRANSMITTER_EVENT:
 466                         lp->stats.tx_packets++;
 467                         dev->tbusy = 0;
 468                         mark_bh(NET_BH);        /* Inform upper layers. */
 469                         if ((status & TX_OK) == 0) lp->stats.tx_errors++;
 470                         if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++;
 471                         if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++;
 472                         if (status & TX_LATE_COL) lp->stats.tx_window_errors++;
 473                         if (status & TX_16_COL) lp->stats.tx_aborted_errors++;
 474                         break;
 475                 case ISQ_BUFFER_EVENT:
 476                         if (status & READY_FOR_TX) {
 477                                 /* we tried to transmit a packet earlier,
 478                                    but inexplicably ran out of buffers.
 479                                    That shouldn't happen since we only ever
 480                                    load one packet.  Shrug.  Do the right
 481                                    thing anyway. */
 482                                 dev->tbusy = 0;
 483                                 mark_bh(NET_BH);        /* Inform upper layers. */
 484                         }
 485                         if (status & TX_UNDERRUN) {
 486                                 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
 487                                 lp->send_underrun++;
 488                                 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
 489                                 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
 490                         }
 491                         break;
 492                 case ISQ_RX_MISS_EVENT:
 493                         lp->stats.rx_missed_errors += (status >>6);
 494                         break;
 495                 case ISQ_TX_COL_EVENT:
 496                         lp->stats.collisions += (status >>6);
 497                         break;
 498                 }
 499         }
 500         dev->interrupt = 0;
 501         return IRQ_HANDLED;
 502 }
 503
 504 /* We have a good packet(s), get it/them out of the buffers. */
 505 static void
 506 net_rx(struct net_device *dev)
 507 {
 508         struct net_local *lp = netdev_priv(dev);
 509         struct sk_buff *skb;
 510         int status, length;
 511
 512         status = readreg(dev, PP_RxStatus);
 513         if ((status & RX_OK) == 0) {
 514                 lp->stats.rx_errors++;
 515                 if (status & RX_RUNT) lp->stats.rx_length_errors++;
 516                 if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++;
 517                 if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT)))
 518                         /* per str 172 */
 519                         lp->stats.rx_crc_errors++;
 520                 if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++;
 521                 return;
 522         }
 523
 524         length = readreg(dev, PP_RxLength);
 525         /* Malloc up new buffer. */
 526         skb = alloc_skb(length, GFP_ATOMIC);
 527         if (skb == NULL) {
 528                 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
 529                 lp->stats.rx_dropped++;
 530                 return;
 531         }
 532         skb_put(skb, length);
 533         skb->dev = dev;
 534
 535         memcpy_fromio(skb->data, dev->mem_start + PP_RxFrame, length);
 536
 537         if (net_debug > 3)printk("%s: received %d byte packet of type %x\n",
 538                                  dev->name, length,
 539                                  (skb->data[ETH_ALEN+ETH_ALEN] << 8)
 540                                  | skb->data[ETH_ALEN+ETH_ALEN+1]);
 541
 542         skb->protocol=eth_type_trans(skb,dev);
 543         netif_rx(skb);
 544         dev->last_rx = jiffies;
 545         lp->stats.rx_packets++;
 546         lp->stats.rx_bytes += length;
 547 }
 548
 549 /* The inverse routine to net_open(). */
 550 static int
 551 net_close(struct net_device *dev)
 552 {
 553
 554         writereg(dev, PP_RxCFG, 0);
 555         writereg(dev, PP_TxCFG, 0);
 556         writereg(dev, PP_BufCFG, 0);
 557         writereg(dev, PP_BusCTL, 0);
 558
 559         netif_stop_queue(dev);
 560
 561         free_irq(dev->irq, dev);
 562
 563         /* Update the statistics here. */
 564
 565         return 0;
 566
 567 }
 568
 569 /* Get the current statistics.  This may be called with the card open or
 570    closed. */
 571 static struct net_device_stats *
 572 net_get_stats(struct net_device *dev)
 573 {
 574         struct net_local *lp = netdev_priv(dev);
 575         unsigned long flags;
 576
 577         local_irq_save(flags);
 578         /* Update the statistics from the device registers. */
 579         lp->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
 580         lp->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
 581         local_irq_restore(flags);
 582
 583         return &lp->stats;
 584 }
 585
 586 static void set_multicast_list(struct net_device *dev)
 587 {
 588         struct net_local *lp = netdev_priv(dev);
 589
 590         if(dev->flags&IFF_PROMISC)
 591         {
 592                 lp->rx_mode = RX_ALL_ACCEPT;
 593         }
 594         else if((dev->flags&IFF_ALLMULTI)||dev->mc_list)
 595         {
 596                 /* The multicast-accept list is initialized to accept-all, and we
 597                    rely on higher-level filtering for now. */
 598                 lp->rx_mode = RX_MULTCAST_ACCEPT;
 599         }
 600         else
 601                 lp->rx_mode = 0;
 602
 603         writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
 604
 605         /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
 606         writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
 607              (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
 608 }
 609
 610
 611 static int set_mac_address(struct net_device *dev, void *addr)
 612 {
 613         int i;
 614         if (dev->start)
 615                 return -EBUSY;
 616         printk("%s: Setting MAC address to ", dev->name);
 617         for (i = 0; i < 6; i++)
 618                 printk(" %2.2x", dev->dev_addr[i] = ((unsigned char *)addr)[i]);
 619         printk(".\n");
 620         /* set the Ethernet address */
 621         for (i=0; i < ETH_ALEN/2; i++)
 622                 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
 623
 624         return 0;
 625 }
 626
 627 #ifdef MODULE
 628
 629 static struct net_device *dev_cs89x0;
 630 static int debug;
 631
 632 MODULE_PARM(debug, "i");
 633 MODULE_PARM_DESC(debug, "CS89[02]0 debug level (0-5)");
 634 MODULE_LICENSE("GPL");
 635
 636 int
 637 init_module(void)
 638 {
 639         net_debug = debug;
 640         dev_cs89x0 = mac89x0_probe(-1);
 641         if (IS_ERR(dev_cs89x0)) {
 642                 printk(KERN_WARNING "mac89x0.c: No card found\n");
 643                 return PTR_ERR(dev_cs89x0);
 644         }
 645         return 0;
 646 }
 647
 648 void
 649 cleanup_module(void)
 650 {
 651         unregister_netdev(dev_cs89x0);
 652         nubus_writew(0, dev_cs89x0->base_addr + ADD_PORT);
 653         free_netdev(dev_cs89x0);
 654 }
 655 #endif /* MODULE */
 656 \f
 657 /*
 658  * Local variables:
 659  *  compile-command: "m68k-linux-gcc -D__KERNEL__ -I../../include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -pipe -fno-strength-reduce -ffixed-a2 -DMODULE -DMODVERSIONS -include ../../include/linux/modversions.h   -c -o mac89x0.o mac89x0.c"
 660  *  version-control: t
 661  *  kept-new-versions: 5
 662  *  c-indent-level: 8
 663  *  tab-width: 8
 664  * End:
 665  *
 666  */