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 = (struct priv *) dev->priv;
 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 void alloc586(struct net_device *dev)
 351 {
 352         struct priv *p = (struct priv *) dev->priv;
 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         DECLARE_MAC_BUF(mac);
 387
 388         if (dev == NULL)
 389                 return len;
 390
 391         len += sprintf(buf + len, "Revision: 0x%x\n",
 392                        inb(dev->base_addr + ELMC_REVISION) & 0xf);
 393         len += sprintf(buf + len, "IRQ: %d\n", dev->irq);
 394         len += sprintf(buf + len, "IO Address: %#lx-%#lx\n", dev->base_addr,
 395                        dev->base_addr + ELMC_IO_EXTENT);
 396         len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start,
 397                        dev->mem_end - 1);
 398         len += sprintf(buf + len, "Transceiver: %s\n", dev->if_port ?
 399                        "External" : "Internal");
 400         len += sprintf(buf + len, "Device: %s\n", dev->name);
 401         len += sprintf(buf + len, "Hardware Address: %s\n",
 402                        print_mac(mac, dev->dev_addr));
 403
 404         return len;
 405 }                               /* elmc_getinfo() */
 406
 407 /*****************************************************************/
 408
 409 static int __init do_elmc_probe(struct net_device *dev)
 410 {
 411         static int slot;
 412         int base_addr = dev->base_addr;
 413         int irq = dev->irq;
 414         u_char status = 0;
 415         u_char revision = 0;
 416         int i = 0;
 417         unsigned int size = 0;
 418         int retval;
 419         struct priv *pr = dev->priv;
 420         DECLARE_MAC_BUF(mac);
 421
 422         if (MCA_bus == 0) {
 423                 return -ENODEV;
 424         }
 425         /* search through the slots for the 3c523. */
 426         slot = mca_find_adapter(ELMC_MCA_ID, 0);
 427         while (slot != -1) {
 428                 status = mca_read_stored_pos(slot, 2);
 429
 430                 dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6];
 431                 dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1];
 432
 433                 /*
 434                    If we're trying to match a specified irq or IO address,
 435                    we'll reject a match unless it's what we're looking for.
 436                    Also reject it if the card is already in use.
 437                  */
 438
 439                 if ((irq && irq != dev->irq) ||
 440                     (base_addr && base_addr != dev->base_addr)) {
 441                         slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
 442                         continue;
 443                 }
 444                 if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) {
 445                         slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
 446                         continue;
 447                 }
 448
 449                 /* found what we're looking for... */
 450                 break;
 451         }
 452
 453         /* we didn't find any 3c523 in the slots we checked for */
 454         if (slot == MCA_NOTFOUND)
 455                 return ((base_addr || irq) ? -ENXIO : -ENODEV);
 456
 457         mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC");
 458         mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev);
 459
 460         /* if we get this far, adapter has been found - carry on */
 461         printk(KERN_INFO "%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1);
 462
 463         /* Now we extract configuration info from the card.
 464            The 3c523 provides information in two of the POS registers, but
 465            the second one is only needed if we want to tell the card what IRQ
 466            to use.  I suspect that whoever sets the thing up initially would
 467            prefer we don't screw with those things.
 468
 469            Note that we read the status info when we found the card...
 470
 471            See 3c523.h for more details.
 472          */
 473
 474         /* revision is stored in the first 4 bits of the revision register */
 475         revision = inb(dev->base_addr + ELMC_REVISION) & 0xf;
 476
 477         /* according to docs, we read the interrupt and write it back to
 478            the IRQ select register, since the POST might not configure the IRQ
 479            properly. */
 480         switch (dev->irq) {
 481         case 3:
 482                 mca_write_pos(slot, 3, 0x04);
 483                 break;
 484         case 7:
 485                 mca_write_pos(slot, 3, 0x02);
 486                 break;
 487         case 9:
 488                 mca_write_pos(slot, 3, 0x08);
 489                 break;
 490         case 12:
 491                 mca_write_pos(slot, 3, 0x01);
 492                 break;
 493         }
 494
 495         memset(pr, 0, sizeof(struct priv));
 496         pr->slot = slot;
 497
 498         printk(KERN_INFO "%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision,
 499                dev->base_addr);
 500
 501         /* Determine if we're using the on-board transceiver (i.e. coax) or
 502            an external one.  The information is pretty much useless, but I
 503            guess it's worth brownie points. */
 504         dev->if_port = (status & ELMC_STATUS_DISABLE_THIN);
 505
 506         /* The 3c523 has a 24K chunk of memory.  The first 16K is the
 507            shared memory, while the last 8K is for the EtherStart BIOS ROM.
 508            Which we don't care much about here.  We'll just tell Linux that
 509            we're using 16K.  MCA won't permit address space conflicts caused
 510            by not mapping the other 8K. */
 511         dev->mem_start = shm_table[(status & ELMC_STATUS_MEMORY_SELECT) >> 3];
 512
 513         /* We're using MCA, so it's a given that the information about memory
 514            size is correct.  The Crynwr drivers do something like this. */
 515
 516         elmc_id_reset586();     /* seems like a good idea before checking it... */
 517
 518         size = 0x4000;          /* check for 16K mem */
 519         if (!check586(dev, dev->mem_start, size)) {
 520                 printk(KERN_ERR "%s: memprobe, Can't find memory at 0x%lx!\n", dev->name,
 521                        dev->mem_start);
 522                 retval = -ENODEV;
 523                 goto err_out;
 524         }
 525         dev->mem_end = dev->mem_start + size;   /* set mem_end showed by 'ifconfig' */
 526
 527         pr->memtop = isa_bus_to_virt(dev->mem_start) + size;
 528         pr->base = (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
 529         alloc586(dev);
 530
 531         elmc_id_reset586();     /* make sure it doesn't generate spurious ints */
 532
 533         /* set number of receive-buffs according to memsize */
 534         pr->num_recv_buffs = NUM_RECV_BUFFS_16;
 535
 536         /* dump all the assorted information */
 537         printk(KERN_INFO "%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name,
 538                dev->irq, dev->if_port ? "ex" : "in",
 539                dev->mem_start, dev->mem_end - 1);
 540
 541         /* The hardware address for the 3c523 is stored in the first six
 542            bytes of the IO address. */
 543         for (i = 0; i < 6; i++)
 544                 dev->dev_addr[i] = inb(dev->base_addr + i);
 545
 546         printk(KERN_INFO "%s: hardware address %s\n",
 547                dev->name, print_mac(mac, dev->dev_addr));
 548
 549         dev->open = &elmc_open;
 550         dev->stop = &elmc_close;
 551         dev->get_stats = &elmc_get_stats;
 552         dev->hard_start_xmit = &elmc_send_packet;
 553         dev->tx_timeout = &elmc_timeout;
 554         dev->watchdog_timeo = HZ;
 555 #ifdef ELMC_MULTICAST
 556         dev->set_multicast_list = &set_multicast_list;
 557 #else
 558         dev->set_multicast_list = NULL;
 559 #endif
 560         dev->ethtool_ops = &netdev_ethtool_ops;
 561
 562         /* note that we haven't actually requested the IRQ from the kernel.
 563            That gets done in elmc_open().  I'm not sure that's such a good idea,
 564            but it works, so I'll go with it. */
 565
 566 #ifndef ELMC_MULTICAST
 567         dev->flags&=~IFF_MULTICAST;     /* Multicast doesn't work */
 568 #endif
 569
 570         retval = register_netdev(dev);
 571         if (retval)
 572                 goto err_out;
 573
 574         return 0;
 575 err_out:
 576         mca_set_adapter_procfn(slot, NULL, NULL);
 577         release_region(dev->base_addr, ELMC_IO_EXTENT);
 578         return retval;
 579 }
 580
 581 static void cleanup_card(struct net_device *dev)
 582 {
 583         mca_set_adapter_procfn(((struct priv *) (dev->priv))->slot, NULL, NULL);
 584         release_region(dev->base_addr, ELMC_IO_EXTENT);
 585 }
 586
 587 #ifndef MODULE
 588 struct net_device * __init elmc_probe(int unit)
 589 {
 590         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
 591         int err;
 592
 593         if (!dev)
 594                 return ERR_PTR(-ENOMEM);
 595
 596         sprintf(dev->name, "eth%d", unit);
 597         netdev_boot_setup_check(dev);
 598
 599         err = do_elmc_probe(dev);
 600         if (err)
 601                 goto out;
 602         return dev;
 603 out:
 604         free_netdev(dev);
 605         return ERR_PTR(err);
 606 }
 607 #endif
 608
 609 /**********************************************
 610  * init the chip (elmc-interrupt should be disabled?!)
 611  * needs a correct 'allocated' memory
 612  */
 613
 614 static int init586(struct net_device *dev)
 615 {
 616         void *ptr;
 617         unsigned long s;
 618         int i, result = 0;
 619         struct priv *p = (struct priv *) dev->priv;
 620         volatile struct configure_cmd_struct *cfg_cmd;
 621         volatile struct iasetup_cmd_struct *ias_cmd;
 622         volatile struct tdr_cmd_struct *tdr_cmd;
 623         volatile struct mcsetup_cmd_struct *mc_cmd;
 624         struct dev_mc_list *dmi = dev->mc_list;
 625         int num_addrs = dev->mc_count;
 626
 627         ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct));
 628
 629         cfg_cmd = (struct configure_cmd_struct *) ptr;  /* configure-command */
 630         cfg_cmd->cmd_status = 0;
 631         cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST;
 632         cfg_cmd->cmd_link = 0xffff;
 633
 634         cfg_cmd->byte_cnt = 0x0a;       /* number of cfg bytes */
 635         cfg_cmd->fifo = 0x08;   /* fifo-limit (8=tx:32/rx:64) */
 636         cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
 637         cfg_cmd->adr_len = 0x2e;        /* addr_len |!src_insert |pre-len |loopback */
 638         cfg_cmd->priority = 0x00;
 639         cfg_cmd->ifs = 0x60;
 640         cfg_cmd->time_low = 0x00;
 641         cfg_cmd->time_high = 0xf2;
 642         cfg_cmd->promisc = 0;
 643         if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC)) {
 644                 cfg_cmd->promisc = 1;
 645                 dev->flags |= IFF_PROMISC;
 646         }
 647         cfg_cmd->carr_coll = 0x00;
 648
 649         p->scb->cbl_offset = make16(cfg_cmd);
 650
 651         p->scb->cmd = CUC_START;        /* cmd.-unit start */
 652         elmc_id_attn586();
 653
 654         s = jiffies;            /* warning: only active with interrupts on !! */
 655         while (!(cfg_cmd->cmd_status & STAT_COMPL)) {
 656                 if (time_after(jiffies, s + 30*HZ/100))
 657                         break;
 658         }
 659
 660         if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) {
 661                 printk(KERN_WARNING "%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status);
 662                 return 1;
 663         }
 664         /*
 665          * individual address setup
 666          */
 667         ias_cmd = (struct iasetup_cmd_struct *) ptr;
 668
 669         ias_cmd->cmd_status = 0;
 670         ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST;
 671         ias_cmd->cmd_link = 0xffff;
 672
 673         memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN);
 674
 675         p->scb->cbl_offset = make16(ias_cmd);
 676
 677         p->scb->cmd = CUC_START;        /* cmd.-unit start */
 678         elmc_id_attn586();
 679
 680         s = jiffies;
 681         while (!(ias_cmd->cmd_status & STAT_COMPL)) {
 682                 if (time_after(jiffies, s + 30*HZ/100))
 683                         break;
 684         }
 685
 686         if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) {
 687                 printk(KERN_WARNING "%s (elmc): individual address setup command failed: %04x\n", dev->name, ias_cmd->cmd_status);
 688                 return 1;
 689         }
 690         /*
 691          * TDR, wire check .. e.g. no resistor e.t.c
 692          */
 693         tdr_cmd = (struct tdr_cmd_struct *) ptr;
 694
 695         tdr_cmd->cmd_status = 0;
 696         tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST;
 697         tdr_cmd->cmd_link = 0xffff;
 698         tdr_cmd->status = 0;
 699
 700         p->scb->cbl_offset = make16(tdr_cmd);
 701
 702         p->scb->cmd = CUC_START;        /* cmd.-unit start */
 703         elmc_attn586();
 704
 705         s = jiffies;
 706         while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
 707                 if (time_after(jiffies, s + 30*HZ/100)) {
 708                         printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
 709                         result = 1;
 710                         break;
 711                 }
 712         }
 713
 714         if (!result) {
 715                 DELAY(2);       /* wait for result */
 716                 result = tdr_cmd->status;
 717
 718                 p->scb->cmd = p->scb->status & STAT_MASK;
 719                 elmc_id_attn586();      /* ack the interrupts */
 720
 721                 if (result & TDR_LNK_OK) {
 722                         /* empty */
 723                 } else if (result & TDR_XCVR_PRB) {
 724                         printk(KERN_WARNING "%s: TDR: Transceiver problem!\n", dev->name);
 725                 } else if (result & TDR_ET_OPN) {
 726                         printk(KERN_WARNING "%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
 727                 } else if (result & TDR_ET_SRT) {
 728                         if (result & TDR_TIMEMASK)      /* time == 0 -> strange :-) */
 729                                 printk(KERN_WARNING "%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
 730                 } else {
 731                         printk(KERN_WARNING "%s: TDR: Unknown status %04x\n", dev->name, result);
 732                 }
 733         }
 734         /*
 735          * ack interrupts
 736          */
 737         p->scb->cmd = p->scb->status & STAT_MASK;
 738         elmc_id_attn586();
 739
 740         /*
 741          * alloc nop/xmit-cmds
 742          */
 743 #if (NUM_XMIT_BUFFS == 1)
 744         for (i = 0; i < 2; i++) {
 745                 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
 746                 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
 747                 p->nop_cmds[i]->cmd_status = 0;
 748                 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
 749                 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 750         }
 751         p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr;   /* transmit cmd/buff 0 */
 752         ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
 753 #else
 754         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 755                 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
 756                 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
 757                 p->nop_cmds[i]->cmd_status = 0;
 758                 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
 759                 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 760                 p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr;   /*transmit cmd/buff 0 */
 761                 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
 762         }
 763 #endif
 764
 765         ptr = alloc_rfa(dev, (void *) ptr);     /* init receive-frame-area */
 766
 767         /*
 768          * Multicast setup
 769          */
 770
 771         if (dev->mc_count) {
 772                 /* I don't understand this: do we really need memory after the init? */
 773                 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
 774                 if (len <= 0) {
 775                         printk(KERN_ERR "%s: Ooooops, no memory for MC-Setup!\n", dev->name);
 776                 } else {
 777                         if (len < num_addrs) {
 778                                 num_addrs = len;
 779                                 printk(KERN_WARNING "%s: Sorry, can only apply %d MC-Address(es).\n",
 780                                        dev->name, num_addrs);
 781                         }
 782                         mc_cmd = (struct mcsetup_cmd_struct *) ptr;
 783                         mc_cmd->cmd_status = 0;
 784                         mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
 785                         mc_cmd->cmd_link = 0xffff;
 786                         mc_cmd->mc_cnt = num_addrs * 6;
 787                         for (i = 0; i < num_addrs; i++) {
 788                                 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr, 6);
 789                                 dmi = dmi->next;
 790                         }
 791                         p->scb->cbl_offset = make16(mc_cmd);
 792                         p->scb->cmd = CUC_START;
 793                         elmc_id_attn586();
 794                         s = jiffies;
 795                         while (!(mc_cmd->cmd_status & STAT_COMPL)) {
 796                                 if (time_after(jiffies, s + 30*HZ/100))
 797                                         break;
 798                         }
 799                         if (!(mc_cmd->cmd_status & STAT_COMPL)) {
 800                                 printk(KERN_WARNING "%s: Can't apply multicast-address-list.\n", dev->name);
 801                         }
 802                 }
 803         }
 804         /*
 805          * alloc xmit-buffs / init xmit_cmds
 806          */
 807         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 808                 p->xmit_cbuffs[i] = (char *) ptr;       /* char-buffs */
 809                 ptr = (char *) ptr + XMIT_BUFF_SIZE;
 810                 p->xmit_buffs[i] = (struct tbd_struct *) ptr;   /* TBD */
 811                 ptr = (char *) ptr + sizeof(struct tbd_struct);
 812                 if ((void *) ptr > (void *) p->iscp) {
 813                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", dev->name);
 814                         return 1;
 815                 }
 816                 memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct));
 817                 memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct));
 818                 p->xmit_cmds[i]->cmd_status = STAT_COMPL;
 819                 p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
 820                 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
 821                 p->xmit_buffs[i]->next = 0xffff;
 822                 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
 823         }
 824
 825         p->xmit_count = 0;
 826         p->xmit_last = 0;
 827 #ifndef NO_NOPCOMMANDS
 828         p->nop_point = 0;
 829 #endif
 830
 831         /*
 832          * 'start transmitter' (nop-loop)
 833          */
 834 #ifndef NO_NOPCOMMANDS
 835         p->scb->cbl_offset = make16(p->nop_cmds[0]);
 836         p->scb->cmd = CUC_START;
 837         elmc_id_attn586();
 838         WAIT_4_SCB_CMD();
 839 #else
 840         p->xmit_cmds[0]->cmd_link = 0xffff;
 841         p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT;
 842 #endif
 843
 844         return 0;
 845 }
 846
 847 /******************************************************
 848  * This is a helper routine for elmc_rnr_int() and init586().
 849  * It sets up the Receive Frame Area (RFA).
 850  */
 851
 852 static void *alloc_rfa(struct net_device *dev, void *ptr)
 853 {
 854         volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr;
 855         volatile struct rbd_struct *rbd;
 856         int i;
 857         struct priv *p = (struct priv *) dev->priv;
 858
 859         memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs);
 860         p->rfd_first = rfd;
 861
 862         for (i = 0; i < p->num_recv_buffs; i++) {
 863                 rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs);
 864         }
 865         rfd[p->num_recv_buffs - 1].last = RFD_SUSP;     /* RU suspend */
 866
 867         ptr = (void *) (rfd + p->num_recv_buffs);
 868
 869         rbd = (struct rbd_struct *) ptr;
 870         ptr = (void *) (rbd + p->num_recv_buffs);
 871
 872         /* clr descriptors */
 873         memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs);
 874
 875         for (i = 0; i < p->num_recv_buffs; i++) {
 876                 rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs));
 877                 rbd[i].size = RECV_BUFF_SIZE;
 878                 rbd[i].buffer = make24(ptr);
 879                 ptr = (char *) ptr + RECV_BUFF_SIZE;
 880         }
 881
 882         p->rfd_top = p->rfd_first;
 883         p->rfd_last = p->rfd_first + p->num_recv_buffs - 1;
 884
 885         p->scb->rfa_offset = make16(p->rfd_first);
 886         p->rfd_first->rbd_offset = make16(rbd);
 887
 888         return ptr;
 889 }
 890
 891
 892 /**************************************************
 893  * Interrupt Handler ...
 894  */
 895
 896 static irqreturn_t
 897 elmc_interrupt(int irq, void *dev_id)
 898 {
 899         struct net_device *dev = dev_id;
 900         unsigned short stat;
 901         struct priv *p;
 902
 903         if (!netif_running(dev)) {
 904                 /* The 3c523 has this habit of generating interrupts during the
 905                    reset.  I'm not sure if the ni52 has this same problem, but it's
 906                    really annoying if we haven't finished initializing it.  I was
 907                    hoping all the elmc_id_* commands would disable this, but I
 908                    might have missed a few. */
 909
 910                 elmc_id_attn586();      /* ack inter. and disable any more */
 911                 return IRQ_HANDLED;
 912         } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) {
 913                 /* wasn't this device */
 914                 return IRQ_NONE;
 915         }
 916         /* reading ELMC_CTRL also clears the INT bit. */
 917
 918         p = (struct priv *) dev->priv;
 919
 920         while ((stat = p->scb->status & STAT_MASK))
 921         {
 922                 p->scb->cmd = stat;
 923                 elmc_attn586(); /* ack inter. */
 924
 925                 if (stat & STAT_CX) {
 926                         /* command with I-bit set complete */
 927                         elmc_xmt_int(dev);
 928                 }
 929                 if (stat & STAT_FR) {
 930                         /* received a frame */
 931                         elmc_rcv_int(dev);
 932                 }
 933 #ifndef NO_NOPCOMMANDS
 934                 if (stat & STAT_CNA) {
 935                         /* CU went 'not ready' */
 936                         if (netif_running(dev)) {
 937                                 printk(KERN_WARNING "%s: oops! CU has left active state. stat: %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
 938                         }
 939                 }
 940 #endif
 941
 942                 if (stat & STAT_RNR) {
 943                         /* RU went 'not ready' */
 944
 945                         if (p->scb->status & RU_SUSPEND) {
 946                                 /* special case: RU_SUSPEND */
 947
 948                                 WAIT_4_SCB_CMD();
 949                                 p->scb->cmd = RUC_RESUME;
 950                                 elmc_attn586();
 951                         } else {
 952                                 printk(KERN_WARNING "%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
 953                                 elmc_rnr_int(dev);
 954                         }
 955                 }
 956                 WAIT_4_SCB_CMD();       /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
 957                 if (p->scb->cmd) {      /* timed out? */
 958                         break;
 959                 }
 960         }
 961         return IRQ_HANDLED;
 962 }
 963
 964 /*******************************************************
 965  * receive-interrupt
 966  */
 967
 968 static void elmc_rcv_int(struct net_device *dev)
 969 {
 970         int status;
 971         unsigned short totlen;
 972         struct sk_buff *skb;
 973         struct rbd_struct *rbd;
 974         struct priv *p = (struct priv *) dev->priv;
 975
 976         for (; (status = p->rfd_top->status) & STAT_COMPL;) {
 977                 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
 978
 979                 if (status & STAT_OK) {         /* frame received without error? */
 980                         if ((totlen = rbd->status) & RBD_LAST) {        /* the first and the last buffer? */
 981                                 totlen &= RBD_MASK;     /* length of this frame */
 982                                 rbd->status = 0;
 983                                 skb = (struct sk_buff *) dev_alloc_skb(totlen + 2);
 984                                 if (skb != NULL) {
 985                                         skb_reserve(skb, 2);    /* 16 byte alignment */
 986                                         skb_put(skb,totlen);
 987                                         skb_copy_to_linear_data(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen);
 988                                         skb->protocol = eth_type_trans(skb, dev);
 989                                         netif_rx(skb);
 990                                         dev->last_rx = jiffies;
 991                                         dev->stats.rx_packets++;
 992                                         dev->stats.rx_bytes += totlen;
 993                                 } else {
 994                                         dev->stats.rx_dropped++;
 995                                 }
 996                         } else {
 997                                 printk(KERN_WARNING "%s: received oversized frame.\n", dev->name);
 998                                 dev->stats.rx_dropped++;
 999                         }
1000                 } else {        /* frame !(ok), only with 'save-bad-frames' */
1001                         printk(KERN_WARNING "%s: oops! rfd-error-status: %04x\n", dev->name, status);
1002                         dev->stats.rx_errors++;
1003                 }
1004                 p->rfd_top->status = 0;
1005                 p->rfd_top->last = RFD_SUSP;
1006                 p->rfd_last->last = 0;  /* delete RU_SUSP  */
1007                 p->rfd_last = p->rfd_top;
1008                 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next);    /* step to next RFD */
1009         }
1010 }
1011
1012 /**********************************************************
1013  * handle 'Receiver went not ready'.
1014  */
1015
1016 static void elmc_rnr_int(struct net_device *dev)
1017 {
1018         struct priv *p = (struct priv *) dev->priv;
1019
1020         dev->stats.rx_errors++;
1021
1022         WAIT_4_SCB_CMD();       /* wait for the last cmd */
1023         p->scb->cmd = RUC_ABORT;        /* usually the RU is in the 'no resource'-state .. abort it now. */
1024         elmc_attn586();
1025         WAIT_4_SCB_CMD();       /* wait for accept cmd. */
1026
1027         alloc_rfa(dev, (char *) p->rfd_first);
1028         startrecv586(dev);      /* restart RU */
1029
1030         printk(KERN_WARNING "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status);
1031
1032 }
1033
1034 /**********************************************************
1035  * handle xmit - interrupt
1036  */
1037
1038 static void elmc_xmt_int(struct net_device *dev)
1039 {
1040         int status;
1041         struct priv *p = (struct priv *) dev->priv;
1042
1043         status = p->xmit_cmds[p->xmit_last]->cmd_status;
1044         if (!(status & STAT_COMPL)) {
1045                 printk(KERN_WARNING "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1046         }
1047         if (status & STAT_OK) {
1048                 dev->stats.tx_packets++;
1049                 dev->stats.collisions += (status & TCMD_MAXCOLLMASK);
1050         } else {
1051                 dev->stats.tx_errors++;
1052                 if (status & TCMD_LATECOLL) {
1053                         printk(KERN_WARNING "%s: late collision detected.\n", dev->name);
1054                         dev->stats.collisions++;
1055                 } else if (status & TCMD_NOCARRIER) {
1056                         dev->stats.tx_carrier_errors++;
1057                         printk(KERN_WARNING "%s: no carrier detected.\n", dev->name);
1058                 } else if (status & TCMD_LOSTCTS) {
1059                         printk(KERN_WARNING "%s: loss of CTS detected.\n", dev->name);
1060                 } else if (status & TCMD_UNDERRUN) {
1061                         dev->stats.tx_fifo_errors++;
1062                         printk(KERN_WARNING "%s: DMA underrun detected.\n", dev->name);
1063                 } else if (status & TCMD_MAXCOLL) {
1064                         printk(KERN_WARNING "%s: Max. collisions exceeded.\n", dev->name);
1065                         dev->stats.collisions += 16;
1066                 }
1067         }
1068
1069 #if (NUM_XMIT_BUFFS != 1)
1070         if ((++p->xmit_last) == NUM_XMIT_BUFFS) {
1071                 p->xmit_last = 0;
1072         }
1073 #endif
1074
1075         netif_wake_queue(dev);
1076 }
1077
1078 /***********************************************************
1079  * (re)start the receiver
1080  */
1081
1082 static void startrecv586(struct net_device *dev)
1083 {
1084         struct priv *p = (struct priv *) dev->priv;
1085
1086         p->scb->rfa_offset = make16(p->rfd_first);
1087         p->scb->cmd = RUC_START;
1088         elmc_attn586();         /* start cmd. */
1089         WAIT_4_SCB_CMD();       /* wait for accept cmd. (no timeout!!) */
1090 }
1091
1092 /******************************************************
1093  * timeout
1094  */
1095
1096 static void elmc_timeout(struct net_device *dev)
1097 {
1098         struct priv *p = (struct priv *) dev->priv;
1099         /* COMMAND-UNIT active? */
1100         if (p->scb->status & CU_ACTIVE) {
1101 #ifdef DEBUG
1102                 printk("%s: strange ... timeout with CU active?!?\n", dev->name);
1103                 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);
1104 #endif
1105                 p->scb->cmd = CUC_ABORT;
1106                 elmc_attn586();
1107                 WAIT_4_SCB_CMD();
1108                 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
1109                 p->scb->cmd = CUC_START;
1110                 elmc_attn586();
1111                 WAIT_4_SCB_CMD();
1112                 netif_wake_queue(dev);
1113         } else {
1114 #ifdef DEBUG
1115                 printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev->name, p->scb->status);
1116                 printk("%s: command-stats: %04x %04x\n", dev->name, p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status);
1117 #endif
1118                 elmc_close(dev);
1119                 elmc_open(dev);
1120         }
1121 }
1122
1123 /******************************************************
1124  * send frame
1125  */
1126
1127 static int elmc_send_packet(struct sk_buff *skb, struct net_device *dev)
1128 {
1129         int len;
1130         int i;
1131 #ifndef NO_NOPCOMMANDS
1132         int next_nop;
1133 #endif
1134         struct priv *p = (struct priv *) dev->priv;
1135
1136         netif_stop_queue(dev);
1137
1138         len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
1139
1140         if (len != skb->len)
1141                 memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
1142         skb_copy_from_linear_data(skb, (char *) p->xmit_cbuffs[p->xmit_count], skb->len);
1143
1144 #if (NUM_XMIT_BUFFS == 1)
1145 #ifdef NO_NOPCOMMANDS
1146         p->xmit_buffs[0]->size = TBD_LAST | len;
1147         for (i = 0; i < 16; i++) {
1148                 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1149                 p->scb->cmd = CUC_START;
1150                 p->xmit_cmds[0]->cmd_status = 0;
1151                         elmc_attn586();
1152                 dev->trans_start = jiffies;
1153                 if (!i) {
1154                         dev_kfree_skb(skb);
1155                 }
1156                 WAIT_4_SCB_CMD();
1157                 if ((p->scb->status & CU_ACTIVE)) {     /* test it, because CU sometimes doesn't start immediately */
1158                         break;
1159                 }
1160                 if (p->xmit_cmds[0]->cmd_status) {
1161                         break;
1162                 }
1163                 if (i == 15) {
1164                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1165                 }
1166         }
1167 #else
1168         next_nop = (p->nop_point + 1) & 0x1;
1169         p->xmit_buffs[0]->size = TBD_LAST | len;
1170
1171         p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1172             = make16((p->nop_cmds[next_nop]));
1173         p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1174
1175         p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1176         dev->trans_start = jiffies;
1177         p->nop_point = next_nop;
1178         dev_kfree_skb(skb);
1179 #endif
1180 #else
1181         p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
1182         if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) {
1183                 next_nop = 0;
1184         }
1185         p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1186         p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1187             = make16((p->nop_cmds[next_nop]));
1188         p->nop_cmds[next_nop]->cmd_status = 0;
1189                 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1190         dev->trans_start = jiffies;
1191         p->xmit_count = next_nop;
1192         if (p->xmit_count != p->xmit_last)
1193                 netif_wake_queue(dev);
1194         dev_kfree_skb(skb);
1195 #endif
1196         return 0;
1197 }
1198
1199 /*******************************************
1200  * Someone wanna have the statistics
1201  */
1202
1203 static struct net_device_stats *elmc_get_stats(struct net_device *dev)
1204 {
1205         struct priv *p = (struct priv *) dev->priv;
1206         unsigned short crc, aln, rsc, ovrn;
1207
1208         crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
1209         p->scb->crc_errs -= crc;
1210         aln = p->scb->aln_errs;
1211         p->scb->aln_errs -= aln;
1212         rsc = p->scb->rsc_errs;
1213         p->scb->rsc_errs -= rsc;
1214         ovrn = p->scb->ovrn_errs;
1215         p->scb->ovrn_errs -= ovrn;
1216
1217         dev->stats.rx_crc_errors += crc;
1218         dev->stats.rx_fifo_errors += ovrn;
1219         dev->stats.rx_frame_errors += aln;
1220         dev->stats.rx_dropped += rsc;
1221
1222         return &dev->stats;
1223 }
1224
1225 /********************************************************
1226  * Set MC list ..
1227  */
1228
1229 #ifdef ELMC_MULTICAST
1230 static void set_multicast_list(struct net_device *dev)
1231 {
1232         if (!dev->start) {
1233                 /* without a running interface, promiscuous doesn't work */
1234                 return;
1235         }
1236         dev->start = 0;
1237         alloc586(dev);
1238         init586(dev);
1239         startrecv586(dev);
1240         dev->start = 1;
1241 }
1242 #endif
1243
1244 static void netdev_get_drvinfo(struct net_device *dev,
1245                                struct ethtool_drvinfo *info)
1246 {
1247         strcpy(info->driver, DRV_NAME);
1248         strcpy(info->version, DRV_VERSION);
1249         sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr);
1250 }
1251
1252 static const struct ethtool_ops netdev_ethtool_ops = {
1253         .get_drvinfo            = netdev_get_drvinfo,
1254 };
1255
1256 #ifdef MODULE
1257
1258 /* Increase if needed ;) */
1259 #define MAX_3C523_CARDS 4
1260
1261 static struct net_device *dev_elmc[MAX_3C523_CARDS];
1262 static int irq[MAX_3C523_CARDS];
1263 static int io[MAX_3C523_CARDS];
1264 module_param_array(irq, int, NULL, 0);
1265 module_param_array(io, int, NULL, 0);
1266 MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)");
1267 MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)");
1268 MODULE_LICENSE("GPL");
1269
1270 int __init init_module(void)
1271 {
1272         int this_dev,found = 0;
1273
1274         /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */
1275         for(this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1276                 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
1277                 if (!dev)
1278                         break;
1279                 dev->irq=irq[this_dev];
1280                 dev->base_addr=io[this_dev];
1281                 if (do_elmc_probe(dev) == 0) {
1282                         dev_elmc[this_dev] = dev;
1283                         found++;
1284                         continue;
1285                 }
1286                 free_netdev(dev);
1287                 if (io[this_dev]==0)
1288                         break;
1289                 printk(KERN_WARNING "3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]);
1290         }
1291
1292         if(found==0) {
1293                 if(io[0]==0) printk(KERN_NOTICE "3c523.c: No 3c523 cards found\n");
1294                 return -ENXIO;
1295         } else return 0;
1296 }
1297
1298 void __exit cleanup_module(void)
1299 {
1300         int this_dev;
1301         for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1302                 struct net_device *dev = dev_elmc[this_dev];
1303                 if (dev) {
1304                         unregister_netdev(dev);
1305                         cleanup_card(dev);
1306                         free_netdev(dev);
1307                 }
1308         }
1309 }
1310
1311 #endif                          /* MODULE */