drivers/net/3c523.c

   1 /*
   2    net-3-driver for the 3c523 Etherlink/MC card (i82586 Ethernet chip)
   3
   4
   5    This is an extension to the Linux operating system, and is covered by the
   6    same GNU General Public License that covers that work.
   7
   8    Copyright 1995, 1996 by Chris Beauregard (cpbeaure@undergrad.math.uwaterloo.ca)
   9
  10    This is basically Michael Hipp's ni52 driver, with a new probing
  11    algorithm and some minor changes to the 82586 CA and reset routines.
  12    Thanks a lot Michael for a really clean i82586 implementation!  Unless
  13    otherwise documented in ni52.c, any bugs are mine.
  14
  15    Contrary to the Ethernet-HOWTO, this isn't based on the 3c507 driver in
  16    any way.  The ni52 is a lot easier to modify.
  17
  18    sources:
  19    ni52.c
  20
  21    Crynwr packet driver collection was a great reference for my first
  22    attempt at this sucker.  The 3c507 driver also helped, until I noticed
  23    that ni52.c was a lot nicer.
  24
  25    EtherLink/MC: Micro Channel Ethernet Adapter Technical Reference
  26    Manual, courtesy of 3Com CardFacts, documents the 3c523-specific
  27    stuff.  Information on CardFacts is found in the Ethernet HOWTO.
  28    Also see <a href="http://www.3com.com/">
  29
  30    Microprocessor Communications Support Chips, T.J. Byers, ISBN
  31    0-444-01224-9, has a section on the i82586.  It tells you just enough
  32    to know that you really don't want to learn how to program the chip.
  33
  34    The original device probe code was stolen from ps2esdi.c
  35
  36    Known Problems:
  37    Since most of the code was stolen from ni52.c, you'll run across the
  38    same bugs in the 0.62 version of ni52.c, plus maybe a few because of
  39    the 3c523 idiosynchacies.  The 3c523 has 16K of RAM though, so there
  40    shouldn't be the overrun problem that the 8K ni52 has.
  41
  42    This driver is for a 16K adapter.  It should work fine on the 64K
  43    adapters, but it will only use one of the 4 banks of RAM.  Modifying
  44    this for the 64K version would require a lot of heinous bank
  45    switching, which I'm sure not interested in doing.  If you try to
  46    implement a bank switching version, you'll basically have to remember
  47    what bank is enabled and do a switch everytime you access a memory
  48    location that's not current.  You'll also have to remap pointers on
  49    the driver side, because it only knows about 16K of the memory.
  50    Anyone desperate or masochistic enough to try?
  51
  52    It seems to be stable now when multiple transmit buffers are used.  I
  53    can't see any performance difference, but then I'm working on a 386SX.
  54
  55    Multicast doesn't work.  It doesn't even pretend to work.  Don't use
  56    it.  Don't compile your kernel with multicast support.  I don't know
  57    why.
  58
  59    Features:
  60    This driver is useable as a loadable module.  If you try to specify an
  61    IRQ or a IO address (via insmod 3c523.o irq=xx io=0xyyy), it will
  62    search the MCA slots until it finds a 3c523 with the specified
  63    parameters.
  64
  65    This driver does support multiple ethernet cards when used as a module
  66    (up to MAX_3C523_CARDS, the default being 4)
  67
  68    This has been tested with both BNC and TP versions, internal and
  69    external transceivers.  Haven't tested with the 64K version (that I
  70    know of).
  71
  72    History:
  73    Jan 1st, 1996
  74    first public release
  75    Feb 4th, 1996
  76    update to 1.3.59, incorporated multicast diffs from ni52.c
  77    Feb 15th, 1996
  78    added shared irq support
  79    Apr 1999
  80    added support for multiple cards when used as a module
  81    added option to disable multicast as is causes problems
  82        Ganesh Sittampalam <ganesh.sittampalam@magdalen.oxford.ac.uk>
  83        Stuart Adamson <stuart.adamson@compsoc.net>
  84    Nov 2001
  85    added support for ethtool (jgarzik)
  86
  87    $Header: /fsys2/home/chrisb/linux-1.3.59-MCA/drivers/net/RCS/3c523.c,v 1.1 1996/02/05 01:53:46 chrisb Exp chrisb $
  88  */
  89
  90 #define DRV_NAME                "3c523"
  91 #define DRV_VERSION             "17-Nov-2001"
  92
  93 #include <linux/init.h>
  94 #include <linux/netdevice.h>
  95 #include <linux/etherdevice.h>
  96 #include <linux/module.h>
  97 #include <linux/kernel.h>
  98 #include <linux/string.h>
  99 #include <linux/errno.h>
 100 #include <linux/ioport.h>
 101 #include <linux/skbuff.h>
 102 #include <linux/slab.h>
 103 #include <linux/interrupt.h>
 104 #include <linux/delay.h>
 105 #include <linux/mca-legacy.h>
 106 #include <linux/ethtool.h>
 107 #include <linux/bitops.h>
 108 #include <linux/jiffies.h>
 109
 110 #include <asm/uaccess.h>
 111 #include <asm/processor.h>
 112 #include <asm/io.h>
 113
 114 #include "3c523.h"
 115
 116 /*************************************************************************/
 117 #define DEBUG                   /* debug on */
 118 #define SYSBUSVAL 0             /* 1 = 8 Bit, 0 = 16 bit - 3c523 only does 16 bit */
 119 #undef ELMC_MULTICAST           /* Disable multicast support as it is somewhat seriously broken at the moment */
 120
 121 #define make32(ptr16) (p->memtop + (short) (ptr16) )
 122 #define make24(ptr32) ((char *) (ptr32) - p->base)
 123 #define make16(ptr32) ((unsigned short) ((unsigned long) (ptr32) - (unsigned long) p->memtop ))
 124
 125 /*************************************************************************/
 126 /*
 127    Tables to which we can map values in the configuration registers.
 128  */
 129 static int irq_table[] __initdata = {
 130         12, 7, 3, 9
 131 };
 132
 133 static int csr_table[] __initdata = {
 134         0x300, 0x1300, 0x2300, 0x3300
 135 };
 136
 137 static int shm_table[] __initdata = {
 138         0x0c0000, 0x0c8000, 0x0d0000, 0x0d8000
 139 };
 140
 141 /******************* how to calculate the buffers *****************************
 142
 143
 144   * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
 145   * --------------- in a different (more stable?) mode. Only in this mode it's
 146   *                 possible to configure the driver with 'NO_NOPCOMMANDS'
 147
 148 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
 149 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
 150 sizeof(rfd) = 24; sizeof(rbd) = 12;
 151 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
 152 sizeof(nop_cmd) = 8;
 153
 154   * if you don't know the driver, better do not change this values: */
 155
 156 #define RECV_BUFF_SIZE 1524     /* slightly oversized */
 157 #define XMIT_BUFF_SIZE 1524     /* slightly oversized */
 158 #define NUM_XMIT_BUFFS 1        /* config for both, 8K and 16K shmem */
 159 #define NUM_RECV_BUFFS_8  4     /* config for 8K shared mem */
 160 #define NUM_RECV_BUFFS_16 9     /* config for 16K shared mem */
 161
 162 #if (NUM_XMIT_BUFFS == 1)
 163 #define NO_NOPCOMMANDS          /* only possible with NUM_XMIT_BUFFS=1 */
 164 #endif
 165
 166 /**************************************************************************/
 167
 168 #define DELAY(x) { mdelay(32 * x); }
 169
 170 /* a much shorter delay: */
 171 #define DELAY_16(); { udelay(16) ; }
 172
 173 /* wait for command with timeout: */
 174 #define WAIT_4_SCB_CMD() { int i; \
 175   for(i=0;i<1024;i++) { \
 176     if(!p->scb->cmd) break; \
 177     DELAY_16(); \
 178     if(i == 1023) { \
 179       printk(KERN_WARNING "%s:%d: scb_cmd timed out .. resetting i82586\n",\
 180         dev->name,__LINE__); \
 181       elmc_id_reset586(); } } }
 182
 183 static irqreturn_t elmc_interrupt(int irq, void *dev_id);
 184 static int elmc_open(struct net_device *dev);
 185 static int elmc_close(struct net_device *dev);
 186 static int elmc_send_packet(struct sk_buff *, struct net_device *);
 187 static struct net_device_stats *elmc_get_stats(struct net_device *dev);
 188 static void elmc_timeout(struct net_device *dev);
 189 #ifdef ELMC_MULTICAST
 190 static void set_multicast_list(struct net_device *dev);
 191 #endif
 192 static const struct ethtool_ops netdev_ethtool_ops;
 193
 194 /* helper-functions */
 195 static int init586(struct net_device *dev);
 196 static int check586(struct net_device *dev, unsigned long where, unsigned size);
 197 static void alloc586(struct net_device *dev);
 198 static void startrecv586(struct net_device *dev);
 199 static void *alloc_rfa(struct net_device *dev, void *ptr);
 200 static void elmc_rcv_int(struct net_device *dev);
 201 static void elmc_xmt_int(struct net_device *dev);
 202 static void elmc_rnr_int(struct net_device *dev);
 203
 204 struct priv {
 205         struct net_device_stats stats;
 206         unsigned long base;
 207         char *memtop;
 208         unsigned long mapped_start;             /* Start of ioremap */
 209         volatile struct rfd_struct *rfd_last, *rfd_top, *rfd_first;
 210         volatile struct scp_struct *scp;        /* volatile is important */
 211         volatile struct iscp_struct *iscp;      /* volatile is important */
 212         volatile struct scb_struct *scb;        /* volatile is important */
 213         volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
 214 #if (NUM_XMIT_BUFFS == 1)
 215         volatile struct transmit_cmd_struct *xmit_cmds[2];
 216         volatile struct nop_cmd_struct *nop_cmds[2];
 217 #else
 218         volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
 219         volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
 220 #endif
 221         volatile int nop_point, num_recv_buffs;
 222         volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
 223         volatile int xmit_count, xmit_last;
 224         volatile int slot;
 225 };
 226
 227 #define elmc_attn586()  {elmc_do_attn586(dev->base_addr,ELMC_CTRL_INTE);}
 228 #define elmc_reset586() {elmc_do_reset586(dev->base_addr,ELMC_CTRL_INTE);}
 229
 230 /* with interrupts disabled - this will clear the interrupt bit in the
 231    3c523 control register, and won't put it back.  This effectively
 232    disables interrupts on the card. */
 233 #define elmc_id_attn586()  {elmc_do_attn586(dev->base_addr,0);}
 234 #define elmc_id_reset586() {elmc_do_reset586(dev->base_addr,0);}
 235
 236 /*************************************************************************/
 237 /*
 238    Do a Channel Attention on the 3c523.  This is extremely board dependent.
 239  */
 240 static void elmc_do_attn586(int ioaddr, int ints)
 241 {
 242         /* the 3c523 requires a minimum of 500 ns.  The delays here might be
 243            a little too large, and hence they may cut the performance of the
 244            card slightly.  If someone who knows a little more about Linux
 245            timing would care to play with these, I'd appreciate it. */
 246
 247         /* this bit masking stuff is crap.  I'd rather have separate
 248            registers with strobe triggers for each of these functions.  <sigh>
 249            Ya take what ya got. */
 250
 251         outb(ELMC_CTRL_RST | 0x3 | ELMC_CTRL_CA | ints, ioaddr + ELMC_CTRL);
 252         DELAY_16();             /* > 500 ns */
 253         outb(ELMC_CTRL_RST | 0x3 | ints, ioaddr + ELMC_CTRL);
 254 }
 255
 256 /*************************************************************************/
 257 /*
 258    Reset the 82586 on the 3c523.  Also very board dependent.
 259  */
 260 static void elmc_do_reset586(int ioaddr, int ints)
 261 {
 262         /* toggle the RST bit low then high */
 263         outb(0x3 | ELMC_CTRL_LBK, ioaddr + ELMC_CTRL);
 264         DELAY_16();             /* > 500 ns */
 265         outb(ELMC_CTRL_RST | ELMC_CTRL_LBK | 0x3, ioaddr + ELMC_CTRL);
 266
 267         elmc_do_attn586(ioaddr, ints);
 268 }
 269
 270 /**********************************************
 271  * close device
 272  */
 273
 274 static int elmc_close(struct net_device *dev)
 275 {
 276         netif_stop_queue(dev);
 277         elmc_id_reset586();     /* the hard way to stop the receiver */
 278         free_irq(dev->irq, dev);
 279         return 0;
 280 }
 281
 282 /**********************************************
 283  * open device
 284  */
 285
 286 static int elmc_open(struct net_device *dev)
 287 {
 288         int ret;
 289
 290         elmc_id_attn586();      /* disable interrupts */
 291
 292         ret = request_irq(dev->irq, &elmc_interrupt, IRQF_SHARED | IRQF_SAMPLE_RANDOM,
 293                           dev->name, dev);
 294         if (ret) {
 295                 printk(KERN_ERR "%s: couldn't get irq %d\n", dev->name, dev->irq);
 296                 elmc_id_reset586();
 297                 return ret;
 298         }
 299         alloc586(dev);
 300         init586(dev);
 301         startrecv586(dev);
 302         netif_start_queue(dev);
 303         return 0;               /* most done by init */
 304 }
 305
 306 /**********************************************
 307  * Check to see if there's an 82586 out there.
 308  */
 309
 310 static int __init check586(struct net_device *dev, unsigned long where, unsigned size)
 311 {
 312         struct priv *p = (struct priv *) dev->priv;
 313         char *iscp_addrs[2];
 314         int i = 0;
 315
 316         p->base = (unsigned long) isa_bus_to_virt((unsigned long)where) + size - 0x01000000;
 317         p->memtop = isa_bus_to_virt((unsigned long)where) + size;
 318         p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
 319         memset((char *) p->scp, 0, sizeof(struct scp_struct));
 320         p->scp->sysbus = SYSBUSVAL;     /* 1 = 8Bit-Bus, 0 = 16 Bit */
 321
 322         iscp_addrs[0] = isa_bus_to_virt((unsigned long)where);
 323         iscp_addrs[1] = (char *) p->scp - sizeof(struct iscp_struct);
 324
 325         for (i = 0; i < 2; i++) {
 326                 p->iscp = (struct iscp_struct *) iscp_addrs[i];
 327                 memset((char *) p->iscp, 0, sizeof(struct iscp_struct));
 328
 329                 p->scp->iscp = make24(p->iscp);
 330                 p->iscp->busy = 1;
 331
 332                 elmc_id_reset586();
 333
 334                 /* reset586 does an implicit CA */
 335
 336                 /* apparently, you sometimes have to kick the 82586 twice... */
 337                 elmc_id_attn586();
 338                 DELAY(1);
 339
 340                 if (p->iscp->busy) {    /* i82586 clears 'busy' after successful init */
 341                         return 0;
 342                 }
 343         }
 344         return 1;
 345 }
 346
 347 /******************************************************************
 348  * set iscp at the right place, called by elmc_probe and open586.
 349  */
 350
 351 void alloc586(struct net_device *dev)
 352 {
 353         struct priv *p = (struct priv *) dev->priv;
 354
 355         elmc_id_reset586();
 356         DELAY(2);
 357
 358         p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
 359         p->scb = (struct scb_struct *) isa_bus_to_virt(dev->mem_start);
 360         p->iscp = (struct iscp_struct *) ((char *) p->scp - sizeof(struct iscp_struct));
 361
 362         memset((char *) p->iscp, 0, sizeof(struct iscp_struct));
 363         memset((char *) p->scp, 0, sizeof(struct scp_struct));
 364
 365         p->scp->iscp = make24(p->iscp);
 366         p->scp->sysbus = SYSBUSVAL;
 367         p->iscp->scb_offset = make16(p->scb);
 368
 369         p->iscp->busy = 1;
 370         elmc_id_reset586();
 371         elmc_id_attn586();
 372
 373         DELAY(2);
 374
 375         if (p->iscp->busy) {
 376                 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
 377         }
 378         memset((char *) p->scb, 0, sizeof(struct scb_struct));
 379 }
 380
 381 /*****************************************************************/
 382
 383 static int elmc_getinfo(char *buf, int slot, void *d)
 384 {
 385         int len = 0;
 386         struct net_device *dev = (struct net_device *) d;
 387         int i;
 388
 389         if (dev == NULL)
 390                 return len;
 391
 392         len += sprintf(buf + len, "Revision: 0x%x\n",
 393                        inb(dev->base_addr + ELMC_REVISION) & 0xf);
 394         len += sprintf(buf + len, "IRQ: %d\n", dev->irq);
 395         len += sprintf(buf + len, "IO Address: %#lx-%#lx\n", dev->base_addr,
 396                        dev->base_addr + ELMC_IO_EXTENT);
 397         len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start,
 398                        dev->mem_end - 1);
 399         len += sprintf(buf + len, "Transceiver: %s\n", dev->if_port ?
 400                        "External" : "Internal");
 401         len += sprintf(buf + len, "Device: %s\n", dev->name);
 402         len += sprintf(buf + len, "Hardware Address:");
 403         for (i = 0; i < 6; i++) {
 404                 len += sprintf(buf + len, " %02x", dev->dev_addr[i]);
 405         }
 406         buf[len++] = '\n';
 407         buf[len] = 0;
 408
 409         return len;
 410 }                               /* elmc_getinfo() */
 411
 412 /*****************************************************************/
 413
 414 static int __init do_elmc_probe(struct net_device *dev)
 415 {
 416         static int slot;
 417         int base_addr = dev->base_addr;
 418         int irq = dev->irq;
 419         u_char status = 0;
 420         u_char revision = 0;
 421         int i = 0;
 422         unsigned int size = 0;
 423         int retval;
 424         struct priv *pr = dev->priv;
 425
 426         SET_MODULE_OWNER(dev);
 427         if (MCA_bus == 0) {
 428                 return -ENODEV;
 429         }
 430         /* search through the slots for the 3c523. */
 431         slot = mca_find_adapter(ELMC_MCA_ID, 0);
 432         while (slot != -1) {
 433                 status = mca_read_stored_pos(slot, 2);
 434
 435                 dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6];
 436                 dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1];
 437
 438                 /*
 439                    If we're trying to match a specified irq or IO address,
 440                    we'll reject a match unless it's what we're looking for.
 441                    Also reject it if the card is already in use.
 442                  */
 443
 444                 if ((irq && irq != dev->irq) ||
 445                     (base_addr && base_addr != dev->base_addr)) {
 446                         slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
 447                         continue;
 448                 }
 449                 if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) {
 450                         slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
 451                         continue;
 452                 }
 453
 454                 /* found what we're looking for... */
 455                 break;
 456         }
 457
 458         /* we didn't find any 3c523 in the slots we checked for */
 459         if (slot == MCA_NOTFOUND)
 460                 return ((base_addr || irq) ? -ENXIO : -ENODEV);
 461
 462         mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC");
 463         mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev);
 464
 465         /* if we get this far, adapter has been found - carry on */
 466         printk(KERN_INFO "%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1);
 467
 468         /* Now we extract configuration info from the card.
 469            The 3c523 provides information in two of the POS registers, but
 470            the second one is only needed if we want to tell the card what IRQ
 471            to use.  I suspect that whoever sets the thing up initially would
 472            prefer we don't screw with those things.
 473
 474            Note that we read the status info when we found the card...
 475
 476            See 3c523.h for more details.
 477          */
 478
 479         /* revision is stored in the first 4 bits of the revision register */
 480         revision = inb(dev->base_addr + ELMC_REVISION) & 0xf;
 481
 482         /* according to docs, we read the interrupt and write it back to
 483            the IRQ select register, since the POST might not configure the IRQ
 484            properly. */
 485         switch (dev->irq) {
 486         case 3:
 487                 mca_write_pos(slot, 3, 0x04);
 488                 break;
 489         case 7:
 490                 mca_write_pos(slot, 3, 0x02);
 491                 break;
 492         case 9:
 493                 mca_write_pos(slot, 3, 0x08);
 494                 break;
 495         case 12:
 496                 mca_write_pos(slot, 3, 0x01);
 497                 break;
 498         }
 499
 500         memset(pr, 0, sizeof(struct priv));
 501         pr->slot = slot;
 502
 503         printk(KERN_INFO "%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision,
 504                dev->base_addr);
 505
 506         /* Determine if we're using the on-board transceiver (i.e. coax) or
 507            an external one.  The information is pretty much useless, but I
 508            guess it's worth brownie points. */
 509         dev->if_port = (status & ELMC_STATUS_DISABLE_THIN);
 510
 511         /* The 3c523 has a 24K chunk of memory.  The first 16K is the
 512            shared memory, while the last 8K is for the EtherStart BIOS ROM.
 513            Which we don't care much about here.  We'll just tell Linux that
 514            we're using 16K.  MCA won't permit address space conflicts caused
 515            by not mapping the other 8K. */
 516         dev->mem_start = shm_table[(status & ELMC_STATUS_MEMORY_SELECT) >> 3];
 517
 518         /* We're using MCA, so it's a given that the information about memory
 519            size is correct.  The Crynwr drivers do something like this. */
 520
 521         elmc_id_reset586();     /* seems like a good idea before checking it... */
 522
 523         size = 0x4000;          /* check for 16K mem */
 524         if (!check586(dev, dev->mem_start, size)) {
 525                 printk(KERN_ERR "%s: memprobe, Can't find memory at 0x%lx!\n", dev->name,
 526                        dev->mem_start);
 527                 retval = -ENODEV;
 528                 goto err_out;
 529         }
 530         dev->mem_end = dev->mem_start + size;   /* set mem_end showed by 'ifconfig' */
 531
 532         pr->memtop = isa_bus_to_virt(dev->mem_start) + size;
 533         pr->base = (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
 534         alloc586(dev);
 535
 536         elmc_id_reset586();     /* make sure it doesn't generate spurious ints */
 537
 538         /* set number of receive-buffs according to memsize */
 539         pr->num_recv_buffs = NUM_RECV_BUFFS_16;
 540
 541         /* dump all the assorted information */
 542         printk(KERN_INFO "%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name,
 543                dev->irq, dev->if_port ? "ex" : "in",
 544                dev->mem_start, dev->mem_end - 1);
 545
 546         /* The hardware address for the 3c523 is stored in the first six
 547            bytes of the IO address. */
 548         printk(KERN_INFO "%s: hardware address ", dev->name);
 549         for (i = 0; i < 6; i++) {
 550                 dev->dev_addr[i] = inb(dev->base_addr + i);
 551                 printk(" %02x", dev->dev_addr[i]);
 552         }
 553         printk("\n");
 554
 555         dev->open = &elmc_open;
 556         dev->stop = &elmc_close;
 557         dev->get_stats = &elmc_get_stats;
 558         dev->hard_start_xmit = &elmc_send_packet;
 559         dev->tx_timeout = &elmc_timeout;
 560         dev->watchdog_timeo = HZ;
 561 #ifdef ELMC_MULTICAST
 562         dev->set_multicast_list = &set_multicast_list;
 563 #else
 564         dev->set_multicast_list = NULL;
 565 #endif
 566         dev->ethtool_ops = &netdev_ethtool_ops;
 567
 568         /* note that we haven't actually requested the IRQ from the kernel.
 569            That gets done in elmc_open().  I'm not sure that's such a good idea,
 570            but it works, so I'll go with it. */
 571
 572 #ifndef ELMC_MULTICAST
 573         dev->flags&=~IFF_MULTICAST;     /* Multicast doesn't work */
 574 #endif
 575
 576         retval = register_netdev(dev);
 577         if (retval)
 578                 goto err_out;
 579
 580         return 0;
 581 err_out:
 582         mca_set_adapter_procfn(slot, NULL, NULL);
 583         release_region(dev->base_addr, ELMC_IO_EXTENT);
 584         return retval;
 585 }
 586
 587 static void cleanup_card(struct net_device *dev)
 588 {
 589         mca_set_adapter_procfn(((struct priv *) (dev->priv))->slot, NULL, NULL);
 590         release_region(dev->base_addr, ELMC_IO_EXTENT);
 591 }
 592
 593 #ifndef MODULE
 594 struct net_device * __init elmc_probe(int unit)
 595 {
 596         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
 597         int err;
 598
 599         if (!dev)
 600                 return ERR_PTR(-ENOMEM);
 601
 602         sprintf(dev->name, "eth%d", unit);
 603         netdev_boot_setup_check(dev);
 604
 605         err = do_elmc_probe(dev);
 606         if (err)
 607                 goto out;
 608         return dev;
 609 out:
 610         free_netdev(dev);
 611         return ERR_PTR(err);
 612 }
 613 #endif
 614
 615 /**********************************************
 616  * init the chip (elmc-interrupt should be disabled?!)
 617  * needs a correct 'allocated' memory
 618  */
 619
 620 static int init586(struct net_device *dev)
 621 {
 622         void *ptr;
 623         unsigned long s;
 624         int i, result = 0;
 625         struct priv *p = (struct priv *) dev->priv;
 626         volatile struct configure_cmd_struct *cfg_cmd;
 627         volatile struct iasetup_cmd_struct *ias_cmd;
 628         volatile struct tdr_cmd_struct *tdr_cmd;
 629         volatile struct mcsetup_cmd_struct *mc_cmd;
 630         struct dev_mc_list *dmi = dev->mc_list;
 631         int num_addrs = dev->mc_count;
 632
 633         ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct));
 634
 635         cfg_cmd = (struct configure_cmd_struct *) ptr;  /* configure-command */
 636         cfg_cmd->cmd_status = 0;
 637         cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST;
 638         cfg_cmd->cmd_link = 0xffff;
 639
 640         cfg_cmd->byte_cnt = 0x0a;       /* number of cfg bytes */
 641         cfg_cmd->fifo = 0x08;   /* fifo-limit (8=tx:32/rx:64) */
 642         cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
 643         cfg_cmd->adr_len = 0x2e;        /* addr_len |!src_insert |pre-len |loopback */
 644         cfg_cmd->priority = 0x00;
 645         cfg_cmd->ifs = 0x60;
 646         cfg_cmd->time_low = 0x00;
 647         cfg_cmd->time_high = 0xf2;
 648         cfg_cmd->promisc = 0;
 649         if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC)) {
 650                 cfg_cmd->promisc = 1;
 651                 dev->flags |= IFF_PROMISC;
 652         }
 653         cfg_cmd->carr_coll = 0x00;
 654
 655         p->scb->cbl_offset = make16(cfg_cmd);
 656
 657         p->scb->cmd = CUC_START;        /* cmd.-unit start */
 658         elmc_id_attn586();
 659
 660         s = jiffies;            /* warning: only active with interrupts on !! */
 661         while (!(cfg_cmd->cmd_status & STAT_COMPL)) {
 662                 if (time_after(jiffies, s + 30*HZ/100))
 663                         break;
 664         }
 665
 666         if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) {
 667                 printk(KERN_WARNING "%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status);
 668                 return 1;
 669         }
 670         /*
 671          * individual address setup
 672          */
 673         ias_cmd = (struct iasetup_cmd_struct *) ptr;
 674
 675         ias_cmd->cmd_status = 0;
 676         ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST;
 677         ias_cmd->cmd_link = 0xffff;
 678
 679         memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN);
 680
 681         p->scb->cbl_offset = make16(ias_cmd);
 682
 683         p->scb->cmd = CUC_START;        /* cmd.-unit start */
 684         elmc_id_attn586();
 685
 686         s = jiffies;
 687         while (!(ias_cmd->cmd_status & STAT_COMPL)) {
 688                 if (time_after(jiffies, s + 30*HZ/100))
 689                         break;
 690         }
 691
 692         if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) {
 693                 printk(KERN_WARNING "%s (elmc): individual address setup command failed: %04x\n", dev->name, ias_cmd->cmd_status);
 694                 return 1;
 695         }
 696         /*
 697          * TDR, wire check .. e.g. no resistor e.t.c
 698          */
 699         tdr_cmd = (struct tdr_cmd_struct *) ptr;
 700
 701         tdr_cmd->cmd_status = 0;
 702         tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST;
 703         tdr_cmd->cmd_link = 0xffff;
 704         tdr_cmd->status = 0;
 705
 706         p->scb->cbl_offset = make16(tdr_cmd);
 707
 708         p->scb->cmd = CUC_START;        /* cmd.-unit start */
 709         elmc_attn586();
 710
 711         s = jiffies;
 712         while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
 713                 if (time_after(jiffies, s + 30*HZ/100)) {
 714                         printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
 715                         result = 1;
 716                         break;
 717                 }
 718         }
 719
 720         if (!result) {
 721                 DELAY(2);       /* wait for result */
 722                 result = tdr_cmd->status;
 723
 724                 p->scb->cmd = p->scb->status & STAT_MASK;
 725                 elmc_id_attn586();      /* ack the interrupts */
 726
 727                 if (result & TDR_LNK_OK) {
 728                         /* empty */
 729                 } else if (result & TDR_XCVR_PRB) {
 730                         printk(KERN_WARNING "%s: TDR: Transceiver problem!\n", dev->name);
 731                 } else if (result & TDR_ET_OPN) {
 732                         printk(KERN_WARNING "%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
 733                 } else if (result & TDR_ET_SRT) {
 734                         if (result & TDR_TIMEMASK)      /* time == 0 -> strange :-) */
 735                                 printk(KERN_WARNING "%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
 736                 } else {
 737                         printk(KERN_WARNING "%s: TDR: Unknown status %04x\n", dev->name, result);
 738                 }
 739         }
 740         /*
 741          * ack interrupts
 742          */
 743         p->scb->cmd = p->scb->status & STAT_MASK;
 744         elmc_id_attn586();
 745
 746         /*
 747          * alloc nop/xmit-cmds
 748          */
 749 #if (NUM_XMIT_BUFFS == 1)
 750         for (i = 0; i < 2; i++) {
 751                 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
 752                 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
 753                 p->nop_cmds[i]->cmd_status = 0;
 754                 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
 755                 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 756         }
 757         p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr;   /* transmit cmd/buff 0 */
 758         ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
 759 #else
 760         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 761                 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
 762                 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
 763                 p->nop_cmds[i]->cmd_status = 0;
 764                 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
 765                 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 766                 p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr;   /*transmit cmd/buff 0 */
 767                 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
 768         }
 769 #endif
 770
 771         ptr = alloc_rfa(dev, (void *) ptr);     /* init receive-frame-area */
 772
 773         /*
 774          * Multicast setup
 775          */
 776
 777         if (dev->mc_count) {
 778                 /* I don't understand this: do we really need memory after the init? */
 779                 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
 780                 if (len <= 0) {
 781                         printk(KERN_ERR "%s: Ooooops, no memory for MC-Setup!\n", dev->name);
 782                 } else {
 783                         if (len < num_addrs) {
 784                                 num_addrs = len;
 785                                 printk(KERN_WARNING "%s: Sorry, can only apply %d MC-Address(es).\n",
 786                                        dev->name, num_addrs);
 787                         }
 788                         mc_cmd = (struct mcsetup_cmd_struct *) ptr;
 789                         mc_cmd->cmd_status = 0;
 790                         mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
 791                         mc_cmd->cmd_link = 0xffff;
 792                         mc_cmd->mc_cnt = num_addrs * 6;
 793                         for (i = 0; i < num_addrs; i++) {
 794                                 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr, 6);
 795                                 dmi = dmi->next;
 796                         }
 797                         p->scb->cbl_offset = make16(mc_cmd);
 798                         p->scb->cmd = CUC_START;
 799                         elmc_id_attn586();
 800                         s = jiffies;
 801                         while (!(mc_cmd->cmd_status & STAT_COMPL)) {
 802                                 if (time_after(jiffies, s + 30*HZ/100))
 803                                         break;
 804                         }
 805                         if (!(mc_cmd->cmd_status & STAT_COMPL)) {
 806                                 printk(KERN_WARNING "%s: Can't apply multicast-address-list.\n", dev->name);
 807                         }
 808                 }
 809         }
 810         /*
 811          * alloc xmit-buffs / init xmit_cmds
 812          */
 813         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 814                 p->xmit_cbuffs[i] = (char *) ptr;       /* char-buffs */
 815                 ptr = (char *) ptr + XMIT_BUFF_SIZE;
 816                 p->xmit_buffs[i] = (struct tbd_struct *) ptr;   /* TBD */
 817                 ptr = (char *) ptr + sizeof(struct tbd_struct);
 818                 if ((void *) ptr > (void *) p->iscp) {
 819                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", dev->name);
 820                         return 1;
 821                 }
 822                 memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct));
 823                 memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct));
 824                 p->xmit_cmds[i]->cmd_status = STAT_COMPL;
 825                 p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
 826                 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
 827                 p->xmit_buffs[i]->next = 0xffff;
 828                 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
 829         }
 830
 831         p->xmit_count = 0;
 832         p->xmit_last = 0;
 833 #ifndef NO_NOPCOMMANDS
 834         p->nop_point = 0;
 835 #endif
 836
 837         /*
 838          * 'start transmitter' (nop-loop)
 839          */
 840 #ifndef NO_NOPCOMMANDS
 841         p->scb->cbl_offset = make16(p->nop_cmds[0]);
 842         p->scb->cmd = CUC_START;
 843         elmc_id_attn586();
 844         WAIT_4_SCB_CMD();
 845 #else
 846         p->xmit_cmds[0]->cmd_link = 0xffff;
 847         p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT;
 848 #endif
 849
 850         return 0;
 851 }
 852
 853 /******************************************************
 854  * This is a helper routine for elmc_rnr_int() and init586().
 855  * It sets up the Receive Frame Area (RFA).
 856  */
 857
 858 static void *alloc_rfa(struct net_device *dev, void *ptr)
 859 {
 860         volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr;
 861         volatile struct rbd_struct *rbd;
 862         int i;
 863         struct priv *p = (struct priv *) dev->priv;
 864
 865         memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs);
 866         p->rfd_first = rfd;
 867
 868         for (i = 0; i < p->num_recv_buffs; i++) {
 869                 rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs);
 870         }
 871         rfd[p->num_recv_buffs - 1].last = RFD_SUSP;     /* RU suspend */
 872
 873         ptr = (void *) (rfd + p->num_recv_buffs);
 874
 875         rbd = (struct rbd_struct *) ptr;
 876         ptr = (void *) (rbd + p->num_recv_buffs);
 877
 878         /* clr descriptors */
 879         memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs);
 880
 881         for (i = 0; i < p->num_recv_buffs; i++) {
 882                 rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs));
 883                 rbd[i].size = RECV_BUFF_SIZE;
 884                 rbd[i].buffer = make24(ptr);
 885                 ptr = (char *) ptr + RECV_BUFF_SIZE;
 886         }
 887
 888         p->rfd_top = p->rfd_first;
 889         p->rfd_last = p->rfd_first + p->num_recv_buffs - 1;
 890
 891         p->scb->rfa_offset = make16(p->rfd_first);
 892         p->rfd_first->rbd_offset = make16(rbd);
 893
 894         return ptr;
 895 }
 896
 897
 898 /**************************************************
 899  * Interrupt Handler ...
 900  */
 901
 902 static irqreturn_t
 903 elmc_interrupt(int irq, void *dev_id)
 904 {
 905         struct net_device *dev = dev_id;
 906         unsigned short stat;
 907         struct priv *p;
 908
 909         if (!netif_running(dev)) {
 910                 /* The 3c523 has this habit of generating interrupts during the
 911                    reset.  I'm not sure if the ni52 has this same problem, but it's
 912                    really annoying if we haven't finished initializing it.  I was
 913                    hoping all the elmc_id_* commands would disable this, but I
 914                    might have missed a few. */
 915
 916                 elmc_id_attn586();      /* ack inter. and disable any more */
 917                 return IRQ_HANDLED;
 918         } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) {
 919                 /* wasn't this device */
 920                 return IRQ_NONE;
 921         }
 922         /* reading ELMC_CTRL also clears the INT bit. */
 923
 924         p = (struct priv *) dev->priv;
 925
 926         while ((stat = p->scb->status & STAT_MASK))
 927         {
 928                 p->scb->cmd = stat;
 929                 elmc_attn586(); /* ack inter. */
 930
 931                 if (stat & STAT_CX) {
 932                         /* command with I-bit set complete */
 933                         elmc_xmt_int(dev);
 934                 }
 935                 if (stat & STAT_FR) {
 936                         /* received a frame */
 937                         elmc_rcv_int(dev);
 938                 }
 939 #ifndef NO_NOPCOMMANDS
 940                 if (stat & STAT_CNA) {
 941                         /* CU went 'not ready' */
 942                         if (netif_running(dev)) {
 943                                 printk(KERN_WARNING "%s: oops! CU has left active state. stat: %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
 944                         }
 945                 }
 946 #endif
 947
 948                 if (stat & STAT_RNR) {
 949                         /* RU went 'not ready' */
 950
 951                         if (p->scb->status & RU_SUSPEND) {
 952                                 /* special case: RU_SUSPEND */
 953
 954                                 WAIT_4_SCB_CMD();
 955                                 p->scb->cmd = RUC_RESUME;
 956                                 elmc_attn586();
 957                         } else {
 958                                 printk(KERN_WARNING "%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
 959                                 elmc_rnr_int(dev);
 960                         }
 961                 }
 962                 WAIT_4_SCB_CMD();       /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
 963                 if (p->scb->cmd) {      /* timed out? */
 964                         break;
 965                 }
 966         }
 967         return IRQ_HANDLED;
 968 }
 969
 970 /*******************************************************
 971  * receive-interrupt
 972  */
 973
 974 static void elmc_rcv_int(struct net_device *dev)
 975 {
 976         int status;
 977         unsigned short totlen;
 978         struct sk_buff *skb;
 979         struct rbd_struct *rbd;
 980         struct priv *p = (struct priv *) dev->priv;
 981
 982         for (; (status = p->rfd_top->status) & STAT_COMPL;) {
 983                 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
 984
 985                 if (status & STAT_OK) {         /* frame received without error? */
 986                         if ((totlen = rbd->status) & RBD_LAST) {        /* the first and the last buffer? */
 987                                 totlen &= RBD_MASK;     /* length of this frame */
 988                                 rbd->status = 0;
 989                                 skb = (struct sk_buff *) dev_alloc_skb(totlen + 2);
 990                                 if (skb != NULL) {
 991                                         skb->dev = dev;
 992                                         skb_reserve(skb, 2);    /* 16 byte alignment */
 993                                         skb_put(skb,totlen);
 994                                         eth_copy_and_sum(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen,0);
 995                                         skb->protocol = eth_type_trans(skb, dev);
 996                                         netif_rx(skb);
 997                                         dev->last_rx = jiffies;
 998                                         p->stats.rx_packets++;
 999                                         p->stats.rx_bytes += totlen;
1000                                 } else {
1001                                         p->stats.rx_dropped++;
1002                                 }
1003                         } else {
1004                                 printk(KERN_WARNING "%s: received oversized frame.\n", dev->name);
1005                                 p->stats.rx_dropped++;
1006                         }
1007                 } else {        /* frame !(ok), only with 'save-bad-frames' */
1008                         printk(KERN_WARNING "%s: oops! rfd-error-status: %04x\n", dev->name, status);
1009                         p->stats.rx_errors++;
1010                 }
1011                 p->rfd_top->status = 0;
1012                 p->rfd_top->last = RFD_SUSP;
1013                 p->rfd_last->last = 0;  /* delete RU_SUSP  */
1014                 p->rfd_last = p->rfd_top;
1015                 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next);    /* step to next RFD */
1016         }
1017 }
1018
1019 /**********************************************************
1020  * handle 'Receiver went not ready'.
1021  */
1022
1023 static void elmc_rnr_int(struct net_device *dev)
1024 {
1025         struct priv *p = (struct priv *) dev->priv;
1026
1027         p->stats.rx_errors++;
1028
1029         WAIT_4_SCB_CMD();       /* wait for the last cmd */
1030         p->scb->cmd = RUC_ABORT;        /* usually the RU is in the 'no resource'-state .. abort it now. */
1031         elmc_attn586();
1032         WAIT_4_SCB_CMD();       /* wait for accept cmd. */
1033
1034         alloc_rfa(dev, (char *) p->rfd_first);
1035         startrecv586(dev);      /* restart RU */
1036
1037         printk(KERN_WARNING "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status);
1038
1039 }
1040
1041 /**********************************************************
1042  * handle xmit - interrupt
1043  */
1044
1045 static void elmc_xmt_int(struct net_device *dev)
1046 {
1047         int status;
1048         struct priv *p = (struct priv *) dev->priv;
1049
1050         status = p->xmit_cmds[p->xmit_last]->cmd_status;
1051         if (!(status & STAT_COMPL)) {
1052                 printk(KERN_WARNING "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1053         }
1054         if (status & STAT_OK) {
1055                 p->stats.tx_packets++;
1056                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1057         } else {
1058                 p->stats.tx_errors++;
1059                 if (status & TCMD_LATECOLL) {
1060                         printk(KERN_WARNING "%s: late collision detected.\n", dev->name);
1061                         p->stats.collisions++;
1062                 } else if (status & TCMD_NOCARRIER) {
1063                         p->stats.tx_carrier_errors++;
1064                         printk(KERN_WARNING "%s: no carrier detected.\n", dev->name);
1065                 } else if (status & TCMD_LOSTCTS) {
1066                         printk(KERN_WARNING "%s: loss of CTS detected.\n", dev->name);
1067                 } else if (status & TCMD_UNDERRUN) {
1068                         p->stats.tx_fifo_errors++;
1069                         printk(KERN_WARNING "%s: DMA underrun detected.\n", dev->name);
1070                 } else if (status & TCMD_MAXCOLL) {
1071                         printk(KERN_WARNING "%s: Max. collisions exceeded.\n", dev->name);
1072                         p->stats.collisions += 16;
1073                 }
1074         }
1075
1076 #if (NUM_XMIT_BUFFS != 1)
1077         if ((++p->xmit_last) == NUM_XMIT_BUFFS) {
1078                 p->xmit_last = 0;
1079         }
1080 #endif
1081
1082         netif_wake_queue(dev);
1083 }
1084
1085 /***********************************************************
1086  * (re)start the receiver
1087  */
1088
1089 static void startrecv586(struct net_device *dev)
1090 {
1091         struct priv *p = (struct priv *) dev->priv;
1092
1093         p->scb->rfa_offset = make16(p->rfd_first);
1094         p->scb->cmd = RUC_START;
1095         elmc_attn586();         /* start cmd. */
1096         WAIT_4_SCB_CMD();       /* wait for accept cmd. (no timeout!!) */
1097 }
1098
1099 /******************************************************
1100  * timeout
1101  */
1102
1103 static void elmc_timeout(struct net_device *dev)
1104 {
1105         struct priv *p = (struct priv *) dev->priv;
1106         /* COMMAND-UNIT active? */
1107         if (p->scb->status & CU_ACTIVE) {
1108 #ifdef DEBUG
1109                 printk("%s: strange ... timeout with CU active?!?\n", dev->name);
1110                 printk("%s: X0: %04x N0: %04x N1: %04x %d\n", dev->name, (int) p->xmit_cmds[0]->cmd_status, (int) p->nop_cmds[0]->cmd_status, (int) p->nop_cmds[1]->cmd_status, (int) p->nop_point);
1111 #endif
1112                 p->scb->cmd = CUC_ABORT;
1113                 elmc_attn586();
1114                 WAIT_4_SCB_CMD();
1115                 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
1116                 p->scb->cmd = CUC_START;
1117                 elmc_attn586();
1118                 WAIT_4_SCB_CMD();
1119                 netif_wake_queue(dev);
1120         } else {
1121 #ifdef DEBUG
1122                 printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev->name, p->scb->status);
1123                 printk("%s: command-stats: %04x %04x\n", dev->name, p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status);
1124 #endif
1125                 elmc_close(dev);
1126                 elmc_open(dev);
1127         }
1128 }
1129
1130 /******************************************************
1131  * send frame
1132  */
1133
1134 static int elmc_send_packet(struct sk_buff *skb, struct net_device *dev)
1135 {
1136         int len;
1137         int i;
1138 #ifndef NO_NOPCOMMANDS
1139         int next_nop;
1140 #endif
1141         struct priv *p = (struct priv *) dev->priv;
1142
1143         netif_stop_queue(dev);
1144
1145         len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
1146
1147         if (len != skb->len)
1148                 memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
1149         memcpy((char *) p->xmit_cbuffs[p->xmit_count], (char *) (skb->data), skb->len);
1150
1151 #if (NUM_XMIT_BUFFS == 1)
1152 #ifdef NO_NOPCOMMANDS
1153         p->xmit_buffs[0]->size = TBD_LAST | len;
1154         for (i = 0; i < 16; i++) {
1155                 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1156                 p->scb->cmd = CUC_START;
1157                 p->xmit_cmds[0]->cmd_status = 0;
1158                         elmc_attn586();
1159                 dev->trans_start = jiffies;
1160                 if (!i) {
1161                         dev_kfree_skb(skb);
1162                 }
1163                 WAIT_4_SCB_CMD();
1164                 if ((p->scb->status & CU_ACTIVE)) {     /* test it, because CU sometimes doesn't start immediately */
1165                         break;
1166                 }
1167                 if (p->xmit_cmds[0]->cmd_status) {
1168                         break;
1169                 }
1170                 if (i == 15) {
1171                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1172                 }
1173         }
1174 #else
1175         next_nop = (p->nop_point + 1) & 0x1;
1176         p->xmit_buffs[0]->size = TBD_LAST | len;
1177
1178         p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1179             = make16((p->nop_cmds[next_nop]));
1180         p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1181
1182         p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1183         dev->trans_start = jiffies;
1184         p->nop_point = next_nop;
1185         dev_kfree_skb(skb);
1186 #endif
1187 #else
1188         p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
1189         if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) {
1190                 next_nop = 0;
1191         }
1192         p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1193         p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1194             = make16((p->nop_cmds[next_nop]));
1195         p->nop_cmds[next_nop]->cmd_status = 0;
1196                 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1197         dev->trans_start = jiffies;
1198         p->xmit_count = next_nop;
1199         if (p->xmit_count != p->xmit_last)
1200                 netif_wake_queue(dev);
1201         dev_kfree_skb(skb);
1202 #endif
1203         return 0;
1204 }
1205
1206 /*******************************************
1207  * Someone wanna have the statistics
1208  */
1209
1210 static struct net_device_stats *elmc_get_stats(struct net_device *dev)
1211 {
1212         struct priv *p = (struct priv *) dev->priv;
1213         unsigned short crc, aln, rsc, ovrn;
1214
1215         crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
1216         p->scb->crc_errs -= crc;
1217         aln = p->scb->aln_errs;
1218         p->scb->aln_errs -= aln;
1219         rsc = p->scb->rsc_errs;
1220         p->scb->rsc_errs -= rsc;
1221         ovrn = p->scb->ovrn_errs;
1222         p->scb->ovrn_errs -= ovrn;
1223
1224         p->stats.rx_crc_errors += crc;
1225         p->stats.rx_fifo_errors += ovrn;
1226         p->stats.rx_frame_errors += aln;
1227         p->stats.rx_dropped += rsc;
1228
1229         return &p->stats;
1230 }
1231
1232 /********************************************************
1233  * Set MC list ..
1234  */
1235
1236 #ifdef ELMC_MULTICAST
1237 static void set_multicast_list(struct net_device *dev)
1238 {
1239         if (!dev->start) {
1240                 /* without a running interface, promiscuous doesn't work */
1241                 return;
1242         }
1243         dev->start = 0;
1244         alloc586(dev);
1245         init586(dev);
1246         startrecv586(dev);
1247         dev->start = 1;
1248 }
1249 #endif
1250
1251 static void netdev_get_drvinfo(struct net_device *dev,
1252                                struct ethtool_drvinfo *info)
1253 {
1254         strcpy(info->driver, DRV_NAME);
1255         strcpy(info->version, DRV_VERSION);
1256         sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr);
1257 }
1258
1259 static const struct ethtool_ops netdev_ethtool_ops = {
1260         .get_drvinfo            = netdev_get_drvinfo,
1261 };
1262
1263 #ifdef MODULE
1264
1265 /* Increase if needed ;) */
1266 #define MAX_3C523_CARDS 4
1267
1268 static struct net_device *dev_elmc[MAX_3C523_CARDS];
1269 static int irq[MAX_3C523_CARDS];
1270 static int io[MAX_3C523_CARDS];
1271 module_param_array(irq, int, NULL, 0);
1272 module_param_array(io, int, NULL, 0);
1273 MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)");
1274 MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)");
1275 MODULE_LICENSE("GPL");
1276
1277 int __init init_module(void)
1278 {
1279         int this_dev,found = 0;
1280
1281         /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */
1282         for(this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1283                 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
1284                 if (!dev)
1285                         break;
1286                 dev->irq=irq[this_dev];
1287                 dev->base_addr=io[this_dev];
1288                 if (do_elmc_probe(dev) == 0) {
1289                         dev_elmc[this_dev] = dev;
1290                         found++;
1291                         continue;
1292                 }
1293                 free_netdev(dev);
1294                 if (io[this_dev]==0)
1295                         break;
1296                 printk(KERN_WARNING "3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]);
1297         }
1298
1299         if(found==0) {
1300                 if(io[0]==0) printk(KERN_NOTICE "3c523.c: No 3c523 cards found\n");
1301                 return -ENXIO;
1302         } else return 0;
1303 }
1304
1305 void __exit cleanup_module(void)
1306 {
1307         int this_dev;
1308         for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1309                 struct net_device *dev = dev_elmc[this_dev];
1310                 if (dev) {
1311                         unregister_netdev(dev);
1312                         cleanup_card(dev);
1313                         free_netdev(dev);
1314                 }
1315         }
1316 }
1317
1318 #endif                          /* MODULE */