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 = d;
 387         DECLARE_MAC_BUF(mac);
 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: %s\n",
 403                        print_mac(mac, dev->dev_addr));
 404
 405         return len;
 406 }                               /* elmc_getinfo() */
 407
 408 /*****************************************************************/
 409
 410 static int __init do_elmc_probe(struct net_device *dev)
 411 {
 412         static int slot;
 413         int base_addr = dev->base_addr;
 414         int irq = dev->irq;
 415         u_char status = 0;
 416         u_char revision = 0;
 417         int i = 0;
 418         unsigned int size = 0;
 419         int retval;
 420         struct priv *pr = dev->priv;
 421         DECLARE_MAC_BUF(mac);
 422
 423         if (MCA_bus == 0) {
 424                 return -ENODEV;
 425         }
 426         /* search through the slots for the 3c523. */
 427         slot = mca_find_adapter(ELMC_MCA_ID, 0);
 428         while (slot != -1) {
 429                 status = mca_read_stored_pos(slot, 2);
 430
 431                 dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6];
 432                 dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1];
 433
 434                 /*
 435                    If we're trying to match a specified irq or IO address,
 436                    we'll reject a match unless it's what we're looking for.
 437                    Also reject it if the card is already in use.
 438                  */
 439
 440                 if ((irq && irq != dev->irq) ||
 441                     (base_addr && base_addr != dev->base_addr)) {
 442                         slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
 443                         continue;
 444                 }
 445                 if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) {
 446                         slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
 447                         continue;
 448                 }
 449
 450                 /* found what we're looking for... */
 451                 break;
 452         }
 453
 454         /* we didn't find any 3c523 in the slots we checked for */
 455         if (slot == MCA_NOTFOUND)
 456                 return ((base_addr || irq) ? -ENXIO : -ENODEV);
 457
 458         mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC");
 459         mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev);
 460
 461         /* if we get this far, adapter has been found - carry on */
 462         printk(KERN_INFO "%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1);
 463
 464         /* Now we extract configuration info from the card.
 465            The 3c523 provides information in two of the POS registers, but
 466            the second one is only needed if we want to tell the card what IRQ
 467            to use.  I suspect that whoever sets the thing up initially would
 468            prefer we don't screw with those things.
 469
 470            Note that we read the status info when we found the card...
 471
 472            See 3c523.h for more details.
 473          */
 474
 475         /* revision is stored in the first 4 bits of the revision register */
 476         revision = inb(dev->base_addr + ELMC_REVISION) & 0xf;
 477
 478         /* according to docs, we read the interrupt and write it back to
 479            the IRQ select register, since the POST might not configure the IRQ
 480            properly. */
 481         switch (dev->irq) {
 482         case 3:
 483                 mca_write_pos(slot, 3, 0x04);
 484                 break;
 485         case 7:
 486                 mca_write_pos(slot, 3, 0x02);
 487                 break;
 488         case 9:
 489                 mca_write_pos(slot, 3, 0x08);
 490                 break;
 491         case 12:
 492                 mca_write_pos(slot, 3, 0x01);
 493                 break;
 494         }
 495
 496         memset(pr, 0, sizeof(struct priv));
 497         pr->slot = slot;
 498
 499         printk(KERN_INFO "%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision,
 500                dev->base_addr);
 501
 502         /* Determine if we're using the on-board transceiver (i.e. coax) or
 503            an external one.  The information is pretty much useless, but I
 504            guess it's worth brownie points. */
 505         dev->if_port = (status & ELMC_STATUS_DISABLE_THIN);
 506
 507         /* The 3c523 has a 24K chunk of memory.  The first 16K is the
 508            shared memory, while the last 8K is for the EtherStart BIOS ROM.
 509            Which we don't care much about here.  We'll just tell Linux that
 510            we're using 16K.  MCA won't permit address space conflicts caused
 511            by not mapping the other 8K. */
 512         dev->mem_start = shm_table[(status & ELMC_STATUS_MEMORY_SELECT) >> 3];
 513
 514         /* We're using MCA, so it's a given that the information about memory
 515            size is correct.  The Crynwr drivers do something like this. */
 516
 517         elmc_id_reset586();     /* seems like a good idea before checking it... */
 518
 519         size = 0x4000;          /* check for 16K mem */
 520         if (!check586(dev, dev->mem_start, size)) {
 521                 printk(KERN_ERR "%s: memprobe, Can't find memory at 0x%lx!\n", dev->name,
 522                        dev->mem_start);
 523                 retval = -ENODEV;
 524                 goto err_out;
 525         }
 526         dev->mem_end = dev->mem_start + size;   /* set mem_end showed by 'ifconfig' */
 527
 528         pr->memtop = isa_bus_to_virt(dev->mem_start) + size;
 529         pr->base = (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
 530         alloc586(dev);
 531
 532         elmc_id_reset586();     /* make sure it doesn't generate spurious ints */
 533
 534         /* set number of receive-buffs according to memsize */
 535         pr->num_recv_buffs = NUM_RECV_BUFFS_16;
 536
 537         /* dump all the assorted information */
 538         printk(KERN_INFO "%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name,
 539                dev->irq, dev->if_port ? "ex" : "in",
 540                dev->mem_start, dev->mem_end - 1);
 541
 542         /* The hardware address for the 3c523 is stored in the first six
 543            bytes of the IO address. */
 544         for (i = 0; i < 6; i++)
 545                 dev->dev_addr[i] = inb(dev->base_addr + i);
 546
 547         printk(KERN_INFO "%s: hardware address %s\n",
 548                dev->name, print_mac(mac, dev->dev_addr));
 549
 550         dev->open = &elmc_open;
 551         dev->stop = &elmc_close;
 552         dev->get_stats = &elmc_get_stats;
 553         dev->hard_start_xmit = &elmc_send_packet;
 554         dev->tx_timeout = &elmc_timeout;
 555         dev->watchdog_timeo = HZ;
 556 #ifdef ELMC_MULTICAST
 557         dev->set_multicast_list = &set_multicast_list;
 558 #else
 559         dev->set_multicast_list = NULL;
 560 #endif
 561         dev->ethtool_ops = &netdev_ethtool_ops;
 562
 563         /* note that we haven't actually requested the IRQ from the kernel.
 564            That gets done in elmc_open().  I'm not sure that's such a good idea,
 565            but it works, so I'll go with it. */
 566
 567 #ifndef ELMC_MULTICAST
 568         dev->flags&=~IFF_MULTICAST;     /* Multicast doesn't work */
 569 #endif
 570
 571         retval = register_netdev(dev);
 572         if (retval)
 573                 goto err_out;
 574
 575         return 0;
 576 err_out:
 577         mca_set_adapter_procfn(slot, NULL, NULL);
 578         release_region(dev->base_addr, ELMC_IO_EXTENT);
 579         return retval;
 580 }
 581
 582 static void cleanup_card(struct net_device *dev)
 583 {
 584         mca_set_adapter_procfn(((struct priv *) (dev->priv))->slot, NULL, NULL);
 585         release_region(dev->base_addr, ELMC_IO_EXTENT);
 586 }
 587
 588 #ifndef MODULE
 589 struct net_device * __init elmc_probe(int unit)
 590 {
 591         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
 592         int err;
 593
 594         if (!dev)
 595                 return ERR_PTR(-ENOMEM);
 596
 597         sprintf(dev->name, "eth%d", unit);
 598         netdev_boot_setup_check(dev);
 599
 600         err = do_elmc_probe(dev);
 601         if (err)
 602                 goto out;
 603         return dev;
 604 out:
 605         free_netdev(dev);
 606         return ERR_PTR(err);
 607 }
 608 #endif
 609
 610 /**********************************************
 611  * init the chip (elmc-interrupt should be disabled?!)
 612  * needs a correct 'allocated' memory
 613  */
 614
 615 static int init586(struct net_device *dev)
 616 {
 617         void *ptr;
 618         unsigned long s;
 619         int i, result = 0;
 620         struct priv *p = (struct priv *) dev->priv;
 621         volatile struct configure_cmd_struct *cfg_cmd;
 622         volatile struct iasetup_cmd_struct *ias_cmd;
 623         volatile struct tdr_cmd_struct *tdr_cmd;
 624         volatile struct mcsetup_cmd_struct *mc_cmd;
 625         struct dev_mc_list *dmi = dev->mc_list;
 626         int num_addrs = dev->mc_count;
 627
 628         ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct));
 629
 630         cfg_cmd = (struct configure_cmd_struct *) ptr;  /* configure-command */
 631         cfg_cmd->cmd_status = 0;
 632         cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST;
 633         cfg_cmd->cmd_link = 0xffff;
 634
 635         cfg_cmd->byte_cnt = 0x0a;       /* number of cfg bytes */
 636         cfg_cmd->fifo = 0x08;   /* fifo-limit (8=tx:32/rx:64) */
 637         cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
 638         cfg_cmd->adr_len = 0x2e;        /* addr_len |!src_insert |pre-len |loopback */
 639         cfg_cmd->priority = 0x00;
 640         cfg_cmd->ifs = 0x60;
 641         cfg_cmd->time_low = 0x00;
 642         cfg_cmd->time_high = 0xf2;
 643         cfg_cmd->promisc = 0;
 644         if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC)) {
 645                 cfg_cmd->promisc = 1;
 646                 dev->flags |= IFF_PROMISC;
 647         }
 648         cfg_cmd->carr_coll = 0x00;
 649
 650         p->scb->cbl_offset = make16(cfg_cmd);
 651
 652         p->scb->cmd = CUC_START;        /* cmd.-unit start */
 653         elmc_id_attn586();
 654
 655         s = jiffies;            /* warning: only active with interrupts on !! */
 656         while (!(cfg_cmd->cmd_status & STAT_COMPL)) {
 657                 if (time_after(jiffies, s + 30*HZ/100))
 658                         break;
 659         }
 660
 661         if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) {
 662                 printk(KERN_WARNING "%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status);
 663                 return 1;
 664         }
 665         /*
 666          * individual address setup
 667          */
 668         ias_cmd = (struct iasetup_cmd_struct *) ptr;
 669
 670         ias_cmd->cmd_status = 0;
 671         ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST;
 672         ias_cmd->cmd_link = 0xffff;
 673
 674         memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN);
 675
 676         p->scb->cbl_offset = make16(ias_cmd);
 677
 678         p->scb->cmd = CUC_START;        /* cmd.-unit start */
 679         elmc_id_attn586();
 680
 681         s = jiffies;
 682         while (!(ias_cmd->cmd_status & STAT_COMPL)) {
 683                 if (time_after(jiffies, s + 30*HZ/100))
 684                         break;
 685         }
 686
 687         if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) {
 688                 printk(KERN_WARNING "%s (elmc): individual address setup command failed: %04x\n", dev->name, ias_cmd->cmd_status);
 689                 return 1;
 690         }
 691         /*
 692          * TDR, wire check .. e.g. no resistor e.t.c
 693          */
 694         tdr_cmd = (struct tdr_cmd_struct *) ptr;
 695
 696         tdr_cmd->cmd_status = 0;
 697         tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST;
 698         tdr_cmd->cmd_link = 0xffff;
 699         tdr_cmd->status = 0;
 700
 701         p->scb->cbl_offset = make16(tdr_cmd);
 702
 703         p->scb->cmd = CUC_START;        /* cmd.-unit start */
 704         elmc_attn586();
 705
 706         s = jiffies;
 707         while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
 708                 if (time_after(jiffies, s + 30*HZ/100)) {
 709                         printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
 710                         result = 1;
 711                         break;
 712                 }
 713         }
 714
 715         if (!result) {
 716                 DELAY(2);       /* wait for result */
 717                 result = tdr_cmd->status;
 718
 719                 p->scb->cmd = p->scb->status & STAT_MASK;
 720                 elmc_id_attn586();      /* ack the interrupts */
 721
 722                 if (result & TDR_LNK_OK) {
 723                         /* empty */
 724                 } else if (result & TDR_XCVR_PRB) {
 725                         printk(KERN_WARNING "%s: TDR: Transceiver problem!\n", dev->name);
 726                 } else if (result & TDR_ET_OPN) {
 727                         printk(KERN_WARNING "%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
 728                 } else if (result & TDR_ET_SRT) {
 729                         if (result & TDR_TIMEMASK)      /* time == 0 -> strange :-) */
 730                                 printk(KERN_WARNING "%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
 731                 } else {
 732                         printk(KERN_WARNING "%s: TDR: Unknown status %04x\n", dev->name, result);
 733                 }
 734         }
 735         /*
 736          * ack interrupts
 737          */
 738         p->scb->cmd = p->scb->status & STAT_MASK;
 739         elmc_id_attn586();
 740
 741         /*
 742          * alloc nop/xmit-cmds
 743          */
 744 #if (NUM_XMIT_BUFFS == 1)
 745         for (i = 0; i < 2; i++) {
 746                 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
 747                 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
 748                 p->nop_cmds[i]->cmd_status = 0;
 749                 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
 750                 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 751         }
 752         p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr;   /* transmit cmd/buff 0 */
 753         ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
 754 #else
 755         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 756                 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
 757                 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
 758                 p->nop_cmds[i]->cmd_status = 0;
 759                 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
 760                 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 761                 p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr;   /*transmit cmd/buff 0 */
 762                 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
 763         }
 764 #endif
 765
 766         ptr = alloc_rfa(dev, (void *) ptr);     /* init receive-frame-area */
 767
 768         /*
 769          * Multicast setup
 770          */
 771
 772         if (dev->mc_count) {
 773                 /* I don't understand this: do we really need memory after the init? */
 774                 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
 775                 if (len <= 0) {
 776                         printk(KERN_ERR "%s: Ooooops, no memory for MC-Setup!\n", dev->name);
 777                 } else {
 778                         if (len < num_addrs) {
 779                                 num_addrs = len;
 780                                 printk(KERN_WARNING "%s: Sorry, can only apply %d MC-Address(es).\n",
 781                                        dev->name, num_addrs);
 782                         }
 783                         mc_cmd = (struct mcsetup_cmd_struct *) ptr;
 784                         mc_cmd->cmd_status = 0;
 785                         mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
 786                         mc_cmd->cmd_link = 0xffff;
 787                         mc_cmd->mc_cnt = num_addrs * 6;
 788                         for (i = 0; i < num_addrs; i++) {
 789                                 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr, 6);
 790                                 dmi = dmi->next;
 791                         }
 792                         p->scb->cbl_offset = make16(mc_cmd);
 793                         p->scb->cmd = CUC_START;
 794                         elmc_id_attn586();
 795                         s = jiffies;
 796                         while (!(mc_cmd->cmd_status & STAT_COMPL)) {
 797                                 if (time_after(jiffies, s + 30*HZ/100))
 798                                         break;
 799                         }
 800                         if (!(mc_cmd->cmd_status & STAT_COMPL)) {
 801                                 printk(KERN_WARNING "%s: Can't apply multicast-address-list.\n", dev->name);
 802                         }
 803                 }
 804         }
 805         /*
 806          * alloc xmit-buffs / init xmit_cmds
 807          */
 808         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 809                 p->xmit_cbuffs[i] = (char *) ptr;       /* char-buffs */
 810                 ptr = (char *) ptr + XMIT_BUFF_SIZE;
 811                 p->xmit_buffs[i] = (struct tbd_struct *) ptr;   /* TBD */
 812                 ptr = (char *) ptr + sizeof(struct tbd_struct);
 813                 if ((void *) ptr > (void *) p->iscp) {
 814                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", dev->name);
 815                         return 1;
 816                 }
 817                 memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct));
 818                 memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct));
 819                 p->xmit_cmds[i]->cmd_status = STAT_COMPL;
 820                 p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
 821                 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
 822                 p->xmit_buffs[i]->next = 0xffff;
 823                 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
 824         }
 825
 826         p->xmit_count = 0;
 827         p->xmit_last = 0;
 828 #ifndef NO_NOPCOMMANDS
 829         p->nop_point = 0;
 830 #endif
 831
 832         /*
 833          * 'start transmitter' (nop-loop)
 834          */
 835 #ifndef NO_NOPCOMMANDS
 836         p->scb->cbl_offset = make16(p->nop_cmds[0]);
 837         p->scb->cmd = CUC_START;
 838         elmc_id_attn586();
 839         WAIT_4_SCB_CMD();
 840 #else
 841         p->xmit_cmds[0]->cmd_link = 0xffff;
 842         p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT;
 843 #endif
 844
 845         return 0;
 846 }
 847
 848 /******************************************************
 849  * This is a helper routine for elmc_rnr_int() and init586().
 850  * It sets up the Receive Frame Area (RFA).
 851  */
 852
 853 static void *alloc_rfa(struct net_device *dev, void *ptr)
 854 {
 855         volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr;
 856         volatile struct rbd_struct *rbd;
 857         int i;
 858         struct priv *p = (struct priv *) dev->priv;
 859
 860         memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs);
 861         p->rfd_first = rfd;
 862
 863         for (i = 0; i < p->num_recv_buffs; i++) {
 864                 rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs);
 865         }
 866         rfd[p->num_recv_buffs - 1].last = RFD_SUSP;     /* RU suspend */
 867
 868         ptr = (void *) (rfd + p->num_recv_buffs);
 869
 870         rbd = (struct rbd_struct *) ptr;
 871         ptr = (void *) (rbd + p->num_recv_buffs);
 872
 873         /* clr descriptors */
 874         memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs);
 875
 876         for (i = 0; i < p->num_recv_buffs; i++) {
 877                 rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs));
 878                 rbd[i].size = RECV_BUFF_SIZE;
 879                 rbd[i].buffer = make24(ptr);
 880                 ptr = (char *) ptr + RECV_BUFF_SIZE;
 881         }
 882
 883         p->rfd_top = p->rfd_first;
 884         p->rfd_last = p->rfd_first + p->num_recv_buffs - 1;
 885
 886         p->scb->rfa_offset = make16(p->rfd_first);
 887         p->rfd_first->rbd_offset = make16(rbd);
 888
 889         return ptr;
 890 }
 891
 892
 893 /**************************************************
 894  * Interrupt Handler ...
 895  */
 896
 897 static irqreturn_t
 898 elmc_interrupt(int irq, void *dev_id)
 899 {
 900         struct net_device *dev = dev_id;
 901         unsigned short stat;
 902         struct priv *p;
 903
 904         if (!netif_running(dev)) {
 905                 /* The 3c523 has this habit of generating interrupts during the
 906                    reset.  I'm not sure if the ni52 has this same problem, but it's
 907                    really annoying if we haven't finished initializing it.  I was
 908                    hoping all the elmc_id_* commands would disable this, but I
 909                    might have missed a few. */
 910
 911                 elmc_id_attn586();      /* ack inter. and disable any more */
 912                 return IRQ_HANDLED;
 913         } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) {
 914                 /* wasn't this device */
 915                 return IRQ_NONE;
 916         }
 917         /* reading ELMC_CTRL also clears the INT bit. */
 918
 919         p = (struct priv *) dev->priv;
 920
 921         while ((stat = p->scb->status & STAT_MASK))
 922         {
 923                 p->scb->cmd = stat;
 924                 elmc_attn586(); /* ack inter. */
 925
 926                 if (stat & STAT_CX) {
 927                         /* command with I-bit set complete */
 928                         elmc_xmt_int(dev);
 929                 }
 930                 if (stat & STAT_FR) {
 931                         /* received a frame */
 932                         elmc_rcv_int(dev);
 933                 }
 934 #ifndef NO_NOPCOMMANDS
 935                 if (stat & STAT_CNA) {
 936                         /* CU went 'not ready' */
 937                         if (netif_running(dev)) {
 938                                 printk(KERN_WARNING "%s: oops! CU has left active state. stat: %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
 939                         }
 940                 }
 941 #endif
 942
 943                 if (stat & STAT_RNR) {
 944                         /* RU went 'not ready' */
 945
 946                         if (p->scb->status & RU_SUSPEND) {
 947                                 /* special case: RU_SUSPEND */
 948
 949                                 WAIT_4_SCB_CMD();
 950                                 p->scb->cmd = RUC_RESUME;
 951                                 elmc_attn586();
 952                         } else {
 953                                 printk(KERN_WARNING "%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
 954                                 elmc_rnr_int(dev);
 955                         }
 956                 }
 957                 WAIT_4_SCB_CMD();       /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
 958                 if (p->scb->cmd) {      /* timed out? */
 959                         break;
 960                 }
 961         }
 962         return IRQ_HANDLED;
 963 }
 964
 965 /*******************************************************
 966  * receive-interrupt
 967  */
 968
 969 static void elmc_rcv_int(struct net_device *dev)
 970 {
 971         int status;
 972         unsigned short totlen;
 973         struct sk_buff *skb;
 974         struct rbd_struct *rbd;
 975         struct priv *p = (struct priv *) dev->priv;
 976
 977         for (; (status = p->rfd_top->status) & STAT_COMPL;) {
 978                 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
 979
 980                 if (status & STAT_OK) {         /* frame received without error? */
 981                         if ((totlen = rbd->status) & RBD_LAST) {        /* the first and the last buffer? */
 982                                 totlen &= RBD_MASK;     /* length of this frame */
 983                                 rbd->status = 0;
 984                                 skb = (struct sk_buff *) dev_alloc_skb(totlen + 2);
 985                                 if (skb != NULL) {
 986                                         skb_reserve(skb, 2);    /* 16 byte alignment */
 987                                         skb_put(skb,totlen);
 988                                         skb_copy_to_linear_data(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen);
 989                                         skb->protocol = eth_type_trans(skb, dev);
 990                                         netif_rx(skb);
 991                                         dev->last_rx = jiffies;
 992                                         p->stats.rx_packets++;
 993                                         p->stats.rx_bytes += totlen;
 994                                 } else {
 995                                         p->stats.rx_dropped++;
 996                                 }
 997                         } else {
 998                                 printk(KERN_WARNING "%s: received oversized frame.\n", dev->name);
 999                                 p->stats.rx_dropped++;
1000                         }
1001                 } else {        /* frame !(ok), only with 'save-bad-frames' */
1002                         printk(KERN_WARNING "%s: oops! rfd-error-status: %04x\n", dev->name, status);
1003                         p->stats.rx_errors++;
1004                 }
1005                 p->rfd_top->status = 0;
1006                 p->rfd_top->last = RFD_SUSP;
1007                 p->rfd_last->last = 0;  /* delete RU_SUSP  */
1008                 p->rfd_last = p->rfd_top;
1009                 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next);    /* step to next RFD */
1010         }
1011 }
1012
1013 /**********************************************************
1014  * handle 'Receiver went not ready'.
1015  */
1016
1017 static void elmc_rnr_int(struct net_device *dev)
1018 {
1019         struct priv *p = (struct priv *) dev->priv;
1020
1021         p->stats.rx_errors++;
1022
1023         WAIT_4_SCB_CMD();       /* wait for the last cmd */
1024         p->scb->cmd = RUC_ABORT;        /* usually the RU is in the 'no resource'-state .. abort it now. */
1025         elmc_attn586();
1026         WAIT_4_SCB_CMD();       /* wait for accept cmd. */
1027
1028         alloc_rfa(dev, (char *) p->rfd_first);
1029         startrecv586(dev);      /* restart RU */
1030
1031         printk(KERN_WARNING "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status);
1032
1033 }
1034
1035 /**********************************************************
1036  * handle xmit - interrupt
1037  */
1038
1039 static void elmc_xmt_int(struct net_device *dev)
1040 {
1041         int status;
1042         struct priv *p = (struct priv *) dev->priv;
1043
1044         status = p->xmit_cmds[p->xmit_last]->cmd_status;
1045         if (!(status & STAT_COMPL)) {
1046                 printk(KERN_WARNING "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1047         }
1048         if (status & STAT_OK) {
1049                 p->stats.tx_packets++;
1050                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1051         } else {
1052                 p->stats.tx_errors++;
1053                 if (status & TCMD_LATECOLL) {
1054                         printk(KERN_WARNING "%s: late collision detected.\n", dev->name);
1055                         p->stats.collisions++;
1056                 } else if (status & TCMD_NOCARRIER) {
1057                         p->stats.tx_carrier_errors++;
1058                         printk(KERN_WARNING "%s: no carrier detected.\n", dev->name);
1059                 } else if (status & TCMD_LOSTCTS) {
1060                         printk(KERN_WARNING "%s: loss of CTS detected.\n", dev->name);
1061                 } else if (status & TCMD_UNDERRUN) {
1062                         p->stats.tx_fifo_errors++;
1063                         printk(KERN_WARNING "%s: DMA underrun detected.\n", dev->name);
1064                 } else if (status & TCMD_MAXCOLL) {
1065                         printk(KERN_WARNING "%s: Max. collisions exceeded.\n", dev->name);
1066                         p->stats.collisions += 16;
1067                 }
1068         }
1069
1070 #if (NUM_XMIT_BUFFS != 1)
1071         if ((++p->xmit_last) == NUM_XMIT_BUFFS) {
1072                 p->xmit_last = 0;
1073         }
1074 #endif
1075
1076         netif_wake_queue(dev);
1077 }
1078
1079 /***********************************************************
1080  * (re)start the receiver
1081  */
1082
1083 static void startrecv586(struct net_device *dev)
1084 {
1085         struct priv *p = (struct priv *) dev->priv;
1086
1087         p->scb->rfa_offset = make16(p->rfd_first);
1088         p->scb->cmd = RUC_START;
1089         elmc_attn586();         /* start cmd. */
1090         WAIT_4_SCB_CMD();       /* wait for accept cmd. (no timeout!!) */
1091 }
1092
1093 /******************************************************
1094  * timeout
1095  */
1096
1097 static void elmc_timeout(struct net_device *dev)
1098 {
1099         struct priv *p = (struct priv *) dev->priv;
1100         /* COMMAND-UNIT active? */
1101         if (p->scb->status & CU_ACTIVE) {
1102 #ifdef DEBUG
1103                 printk("%s: strange ... timeout with CU active?!?\n", dev->name);
1104                 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);
1105 #endif
1106                 p->scb->cmd = CUC_ABORT;
1107                 elmc_attn586();
1108                 WAIT_4_SCB_CMD();
1109                 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
1110                 p->scb->cmd = CUC_START;
1111                 elmc_attn586();
1112                 WAIT_4_SCB_CMD();
1113                 netif_wake_queue(dev);
1114         } else {
1115 #ifdef DEBUG
1116                 printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev->name, p->scb->status);
1117                 printk("%s: command-stats: %04x %04x\n", dev->name, p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status);
1118 #endif
1119                 elmc_close(dev);
1120                 elmc_open(dev);
1121         }
1122 }
1123
1124 /******************************************************
1125  * send frame
1126  */
1127
1128 static int elmc_send_packet(struct sk_buff *skb, struct net_device *dev)
1129 {
1130         int len;
1131         int i;
1132 #ifndef NO_NOPCOMMANDS
1133         int next_nop;
1134 #endif
1135         struct priv *p = (struct priv *) dev->priv;
1136
1137         netif_stop_queue(dev);
1138
1139         len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
1140
1141         if (len != skb->len)
1142                 memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
1143         skb_copy_from_linear_data(skb, (char *) p->xmit_cbuffs[p->xmit_count], skb->len);
1144
1145 #if (NUM_XMIT_BUFFS == 1)
1146 #ifdef NO_NOPCOMMANDS
1147         p->xmit_buffs[0]->size = TBD_LAST | len;
1148         for (i = 0; i < 16; i++) {
1149                 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1150                 p->scb->cmd = CUC_START;
1151                 p->xmit_cmds[0]->cmd_status = 0;
1152                         elmc_attn586();
1153                 dev->trans_start = jiffies;
1154                 if (!i) {
1155                         dev_kfree_skb(skb);
1156                 }
1157                 WAIT_4_SCB_CMD();
1158                 if ((p->scb->status & CU_ACTIVE)) {     /* test it, because CU sometimes doesn't start immediately */
1159                         break;
1160                 }
1161                 if (p->xmit_cmds[0]->cmd_status) {
1162                         break;
1163                 }
1164                 if (i == 15) {
1165                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1166                 }
1167         }
1168 #else
1169         next_nop = (p->nop_point + 1) & 0x1;
1170         p->xmit_buffs[0]->size = TBD_LAST | len;
1171
1172         p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1173             = make16((p->nop_cmds[next_nop]));
1174         p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1175
1176         p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1177         dev->trans_start = jiffies;
1178         p->nop_point = next_nop;
1179         dev_kfree_skb(skb);
1180 #endif
1181 #else
1182         p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
1183         if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) {
1184                 next_nop = 0;
1185         }
1186         p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1187         p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1188             = make16((p->nop_cmds[next_nop]));
1189         p->nop_cmds[next_nop]->cmd_status = 0;
1190                 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1191         dev->trans_start = jiffies;
1192         p->xmit_count = next_nop;
1193         if (p->xmit_count != p->xmit_last)
1194                 netif_wake_queue(dev);
1195         dev_kfree_skb(skb);
1196 #endif
1197         return 0;
1198 }
1199
1200 /*******************************************
1201  * Someone wanna have the statistics
1202  */
1203
1204 static struct net_device_stats *elmc_get_stats(struct net_device *dev)
1205 {
1206         struct priv *p = (struct priv *) dev->priv;
1207         unsigned short crc, aln, rsc, ovrn;
1208
1209         crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
1210         p->scb->crc_errs -= crc;
1211         aln = p->scb->aln_errs;
1212         p->scb->aln_errs -= aln;
1213         rsc = p->scb->rsc_errs;
1214         p->scb->rsc_errs -= rsc;
1215         ovrn = p->scb->ovrn_errs;
1216         p->scb->ovrn_errs -= ovrn;
1217
1218         p->stats.rx_crc_errors += crc;
1219         p->stats.rx_fifo_errors += ovrn;
1220         p->stats.rx_frame_errors += aln;
1221         p->stats.rx_dropped += rsc;
1222
1223         return &p->stats;
1224 }
1225
1226 /********************************************************
1227  * Set MC list ..
1228  */
1229
1230 #ifdef ELMC_MULTICAST
1231 static void set_multicast_list(struct net_device *dev)
1232 {
1233         if (!dev->start) {
1234                 /* without a running interface, promiscuous doesn't work */
1235                 return;
1236         }
1237         dev->start = 0;
1238         alloc586(dev);
1239         init586(dev);
1240         startrecv586(dev);
1241         dev->start = 1;
1242 }
1243 #endif
1244
1245 static void netdev_get_drvinfo(struct net_device *dev,
1246                                struct ethtool_drvinfo *info)
1247 {
1248         strcpy(info->driver, DRV_NAME);
1249         strcpy(info->version, DRV_VERSION);
1250         sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr);
1251 }
1252
1253 static const struct ethtool_ops netdev_ethtool_ops = {
1254         .get_drvinfo            = netdev_get_drvinfo,
1255 };
1256
1257 #ifdef MODULE
1258
1259 /* Increase if needed ;) */
1260 #define MAX_3C523_CARDS 4
1261
1262 static struct net_device *dev_elmc[MAX_3C523_CARDS];
1263 static int irq[MAX_3C523_CARDS];
1264 static int io[MAX_3C523_CARDS];
1265 module_param_array(irq, int, NULL, 0);
1266 module_param_array(io, int, NULL, 0);
1267 MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)");
1268 MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)");
1269 MODULE_LICENSE("GPL");
1270
1271 int __init init_module(void)
1272 {
1273         int this_dev,found = 0;
1274
1275         /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */
1276         for(this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1277                 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
1278                 if (!dev)
1279                         break;
1280                 dev->irq=irq[this_dev];
1281                 dev->base_addr=io[this_dev];
1282                 if (do_elmc_probe(dev) == 0) {
1283                         dev_elmc[this_dev] = dev;
1284                         found++;
1285                         continue;
1286                 }
1287                 free_netdev(dev);
1288                 if (io[this_dev]==0)
1289                         break;
1290                 printk(KERN_WARNING "3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]);
1291         }
1292
1293         if(found==0) {
1294                 if(io[0]==0) printk(KERN_NOTICE "3c523.c: No 3c523 cards found\n");
1295                 return -ENXIO;
1296         } else return 0;
1297 }
1298
1299 void __exit cleanup_module(void)
1300 {
1301         int this_dev;
1302         for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1303                 struct net_device *dev = dev_elmc[this_dev];
1304                 if (dev) {
1305                         unregister_netdev(dev);
1306                         cleanup_card(dev);
1307                         free_netdev(dev);
1308                 }
1309         }
1310 }
1311
1312 #endif                          /* MODULE */