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