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/interrupt.h>
 103 #include <linux/delay.h>
 104 #include <linux/mca-legacy.h>
 105 #include <linux/ethtool.h>
 106 #include <linux/bitops.h>
 107 #include <linux/jiffies.h>
 108
 109 #include <asm/uaccess.h>
 110 #include <asm/processor.h>
 111 #include <asm/io.h>
 112
 113 #include "3c523.h"
 114
 115 /*************************************************************************/
 116 #define DEBUG                   /* debug on */
 117 #define SYSBUSVAL 0             /* 1 = 8 Bit, 0 = 16 bit - 3c523 only does 16 bit */
 118 #undef ELMC_MULTICAST           /* Disable multicast support as it is somewhat seriously broken at the moment */
 119
 120 #define make32(ptr16) (p->memtop + (short) (ptr16) )
 121 #define make24(ptr32) ((char *) (ptr32) - p->base)
 122 #define make16(ptr32) ((unsigned short) ((unsigned long) (ptr32) - (unsigned long) p->memtop ))
 123
 124 /*************************************************************************/
 125 /*
 126    Tables to which we can map values in the configuration registers.
 127  */
 128 static int irq_table[] __initdata = {
 129         12, 7, 3, 9
 130 };
 131
 132 static int csr_table[] __initdata = {
 133         0x300, 0x1300, 0x2300, 0x3300
 134 };
 135
 136 static int shm_table[] __initdata = {
 137         0x0c0000, 0x0c8000, 0x0d0000, 0x0d8000
 138 };
 139
 140 /******************* how to calculate the buffers *****************************
 141
 142
 143   * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
 144   * --------------- in a different (more stable?) mode. Only in this mode it's
 145   *                 possible to configure the driver with 'NO_NOPCOMMANDS'
 146
 147 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
 148 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
 149 sizeof(rfd) = 24; sizeof(rbd) = 12;
 150 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
 151 sizeof(nop_cmd) = 8;
 152
 153   * if you don't know the driver, better do not change this values: */
 154
 155 #define RECV_BUFF_SIZE 1524     /* slightly oversized */
 156 #define XMIT_BUFF_SIZE 1524     /* slightly oversized */
 157 #define NUM_XMIT_BUFFS 1        /* config for both, 8K and 16K shmem */
 158 #define NUM_RECV_BUFFS_8  4     /* config for 8K shared mem */
 159 #define NUM_RECV_BUFFS_16 9     /* config for 16K shared mem */
 160
 161 #if (NUM_XMIT_BUFFS == 1)
 162 #define NO_NOPCOMMANDS          /* only possible with NUM_XMIT_BUFFS=1 */
 163 #endif
 164
 165 /**************************************************************************/
 166
 167 #define DELAY(x) { mdelay(32 * x); }
 168
 169 /* a much shorter delay: */
 170 #define DELAY_16(); { udelay(16) ; }
 171
 172 /* wait for command with timeout: */
 173 #define WAIT_4_SCB_CMD() { int i; \
 174   for(i=0;i<1024;i++) { \
 175     if(!p->scb->cmd) break; \
 176     DELAY_16(); \
 177     if(i == 1023) { \
 178       pr_warning("%s:%d: scb_cmd timed out .. resetting i82586\n",\
 179         dev->name,__LINE__); \
 180       elmc_id_reset586(); } } }
 181
 182 static irqreturn_t elmc_interrupt(int irq, void *dev_id);
 183 static int elmc_open(struct net_device *dev);
 184 static int elmc_close(struct net_device *dev);
 185 static netdev_tx_t elmc_send_packet(struct sk_buff *, struct net_device *);
 186 static struct net_device_stats *elmc_get_stats(struct net_device *dev);
 187 static void elmc_timeout(struct net_device *dev);
 188 #ifdef ELMC_MULTICAST
 189 static void set_multicast_list(struct net_device *dev);
 190 #endif
 191 static const struct ethtool_ops netdev_ethtool_ops;
 192
 193 /* helper-functions */
 194 static int init586(struct net_device *dev);
 195 static int check586(struct net_device *dev, unsigned long where, unsigned size);
 196 static void alloc586(struct net_device *dev);
 197 static void startrecv586(struct net_device *dev);
 198 static void *alloc_rfa(struct net_device *dev, void *ptr);
 199 static void elmc_rcv_int(struct net_device *dev);
 200 static void elmc_xmt_int(struct net_device *dev);
 201 static void elmc_rnr_int(struct net_device *dev);
 202
 203 struct priv {
 204         unsigned long base;
 205         char *memtop;
 206         unsigned long mapped_start;             /* Start of ioremap */
 207         volatile struct rfd_struct *rfd_last, *rfd_top, *rfd_first;
 208         volatile struct scp_struct *scp;        /* volatile is important */
 209         volatile struct iscp_struct *iscp;      /* volatile is important */
 210         volatile struct scb_struct *scb;        /* volatile is important */
 211         volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
 212 #if (NUM_XMIT_BUFFS == 1)
 213         volatile struct transmit_cmd_struct *xmit_cmds[2];
 214         volatile struct nop_cmd_struct *nop_cmds[2];
 215 #else
 216         volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
 217         volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
 218 #endif
 219         volatile int nop_point, num_recv_buffs;
 220         volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
 221         volatile int xmit_count, xmit_last;
 222         volatile int slot;
 223 };
 224
 225 #define elmc_attn586()  {elmc_do_attn586(dev->base_addr,ELMC_CTRL_INTE);}
 226 #define elmc_reset586() {elmc_do_reset586(dev->base_addr,ELMC_CTRL_INTE);}
 227
 228 /* with interrupts disabled - this will clear the interrupt bit in the
 229    3c523 control register, and won't put it back.  This effectively
 230    disables interrupts on the card. */
 231 #define elmc_id_attn586()  {elmc_do_attn586(dev->base_addr,0);}
 232 #define elmc_id_reset586() {elmc_do_reset586(dev->base_addr,0);}
 233
 234 /*************************************************************************/
 235 /*
 236    Do a Channel Attention on the 3c523.  This is extremely board dependent.
 237  */
 238 static void elmc_do_attn586(int ioaddr, int ints)
 239 {
 240         /* the 3c523 requires a minimum of 500 ns.  The delays here might be
 241            a little too large, and hence they may cut the performance of the
 242            card slightly.  If someone who knows a little more about Linux
 243            timing would care to play with these, I'd appreciate it. */
 244
 245         /* this bit masking stuff is crap.  I'd rather have separate
 246            registers with strobe triggers for each of these functions.  <sigh>
 247            Ya take what ya got. */
 248
 249         outb(ELMC_CTRL_RST | 0x3 | ELMC_CTRL_CA | ints, ioaddr + ELMC_CTRL);
 250         DELAY_16();             /* > 500 ns */
 251         outb(ELMC_CTRL_RST | 0x3 | ints, ioaddr + ELMC_CTRL);
 252 }
 253
 254 /*************************************************************************/
 255 /*
 256    Reset the 82586 on the 3c523.  Also very board dependent.
 257  */
 258 static void elmc_do_reset586(int ioaddr, int ints)
 259 {
 260         /* toggle the RST bit low then high */
 261         outb(0x3 | ELMC_CTRL_LBK, ioaddr + ELMC_CTRL);
 262         DELAY_16();             /* > 500 ns */
 263         outb(ELMC_CTRL_RST | ELMC_CTRL_LBK | 0x3, ioaddr + ELMC_CTRL);
 264
 265         elmc_do_attn586(ioaddr, ints);
 266 }
 267
 268 /**********************************************
 269  * close device
 270  */
 271
 272 static int elmc_close(struct net_device *dev)
 273 {
 274         netif_stop_queue(dev);
 275         elmc_id_reset586();     /* the hard way to stop the receiver */
 276         free_irq(dev->irq, dev);
 277         return 0;
 278 }
 279
 280 /**********************************************
 281  * open device
 282  */
 283
 284 static int elmc_open(struct net_device *dev)
 285 {
 286         int ret;
 287
 288         elmc_id_attn586();      /* disable interrupts */
 289
 290         ret = request_irq(dev->irq, elmc_interrupt, IRQF_SHARED | IRQF_SAMPLE_RANDOM,
 291                           dev->name, dev);
 292         if (ret) {
 293                 pr_err("%s: couldn't get irq %d\n", dev->name, dev->irq);
 294                 elmc_id_reset586();
 295                 return ret;
 296         }
 297         alloc586(dev);
 298         init586(dev);
 299         startrecv586(dev);
 300         netif_start_queue(dev);
 301         return 0;               /* most done by init */
 302 }
 303
 304 /**********************************************
 305  * Check to see if there's an 82586 out there.
 306  */
 307
 308 static int __init check586(struct net_device *dev, unsigned long where, unsigned size)
 309 {
 310         struct priv *p = netdev_priv(dev);
 311         char *iscp_addrs[2];
 312         int i = 0;
 313
 314         p->base = (unsigned long) isa_bus_to_virt((unsigned long)where) + size - 0x01000000;
 315         p->memtop = isa_bus_to_virt((unsigned long)where) + size;
 316         p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
 317         memset((char *) p->scp, 0, sizeof(struct scp_struct));
 318         p->scp->sysbus = SYSBUSVAL;     /* 1 = 8Bit-Bus, 0 = 16 Bit */
 319
 320         iscp_addrs[0] = isa_bus_to_virt((unsigned long)where);
 321         iscp_addrs[1] = (char *) p->scp - sizeof(struct iscp_struct);
 322
 323         for (i = 0; i < 2; i++) {
 324                 p->iscp = (struct iscp_struct *) iscp_addrs[i];
 325                 memset((char *) p->iscp, 0, sizeof(struct iscp_struct));
 326
 327                 p->scp->iscp = make24(p->iscp);
 328                 p->iscp->busy = 1;
 329
 330                 elmc_id_reset586();
 331
 332                 /* reset586 does an implicit CA */
 333
 334                 /* apparently, you sometimes have to kick the 82586 twice... */
 335                 elmc_id_attn586();
 336                 DELAY(1);
 337
 338                 if (p->iscp->busy) {    /* i82586 clears 'busy' after successful init */
 339                         return 0;
 340                 }
 341         }
 342         return 1;
 343 }
 344
 345 /******************************************************************
 346  * set iscp at the right place, called by elmc_probe and open586.
 347  */
 348
 349 static void alloc586(struct net_device *dev)
 350 {
 351         struct priv *p = netdev_priv(dev);
 352
 353         elmc_id_reset586();
 354         DELAY(2);
 355
 356         p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
 357         p->scb = (struct scb_struct *) isa_bus_to_virt(dev->mem_start);
 358         p->iscp = (struct iscp_struct *) ((char *) p->scp - sizeof(struct iscp_struct));
 359
 360         memset((char *) p->iscp, 0, sizeof(struct iscp_struct));
 361         memset((char *) p->scp, 0, sizeof(struct scp_struct));
 362
 363         p->scp->iscp = make24(p->iscp);
 364         p->scp->sysbus = SYSBUSVAL;
 365         p->iscp->scb_offset = make16(p->scb);
 366
 367         p->iscp->busy = 1;
 368         elmc_id_reset586();
 369         elmc_id_attn586();
 370
 371         DELAY(2);
 372
 373         if (p->iscp->busy)
 374                 pr_err("%s: Init-Problems (alloc).\n", dev->name);
 375
 376         memset((char *) p->scb, 0, sizeof(struct scb_struct));
 377 }
 378
 379 /*****************************************************************/
 380
 381 static int elmc_getinfo(char *buf, int slot, void *d)
 382 {
 383         int len = 0;
 384         struct net_device *dev = d;
 385
 386         if (dev == NULL)
 387                 return len;
 388
 389         len += sprintf(buf + len, "Revision: 0x%x\n",
 390                        inb(dev->base_addr + ELMC_REVISION) & 0xf);
 391         len += sprintf(buf + len, "IRQ: %d\n", dev->irq);
 392         len += sprintf(buf + len, "IO Address: %#lx-%#lx\n", dev->base_addr,
 393                        dev->base_addr + ELMC_IO_EXTENT);
 394         len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start,
 395                        dev->mem_end - 1);
 396         len += sprintf(buf + len, "Transceiver: %s\n", dev->if_port ?
 397                        "External" : "Internal");
 398         len += sprintf(buf + len, "Device: %s\n", dev->name);
 399         len += sprintf(buf + len, "Hardware Address: %pM\n",
 400                        dev->dev_addr);
 401
 402         return len;
 403 }                               /* elmc_getinfo() */
 404
 405 static const struct net_device_ops netdev_ops = {
 406         .ndo_open               = elmc_open,
 407         .ndo_stop               = elmc_close,
 408         .ndo_get_stats          = elmc_get_stats,
 409         .ndo_start_xmit         = elmc_send_packet,
 410         .ndo_tx_timeout         = elmc_timeout,
 411 #ifdef ELMC_MULTICAST
 412         .ndo_set_multicast_list = set_multicast_list,
 413 #endif
 414         .ndo_change_mtu         = eth_change_mtu,
 415         .ndo_set_mac_address    = eth_mac_addr,
 416         .ndo_validate_addr      = eth_validate_addr,
 417 };
 418
 419 /*****************************************************************/
 420
 421 static int __init do_elmc_probe(struct net_device *dev)
 422 {
 423         static int slot;
 424         int base_addr = dev->base_addr;
 425         int irq = dev->irq;
 426         u_char status = 0;
 427         u_char revision = 0;
 428         int i = 0;
 429         unsigned int size = 0;
 430         int retval;
 431         struct priv *pr = netdev_priv(dev);
 432
 433         if (MCA_bus == 0) {
 434                 return -ENODEV;
 435         }
 436         /* search through the slots for the 3c523. */
 437         slot = mca_find_adapter(ELMC_MCA_ID, 0);
 438         while (slot != -1) {
 439                 status = mca_read_stored_pos(slot, 2);
 440
 441                 dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6];
 442                 dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1];
 443
 444                 /*
 445                    If we're trying to match a specified irq or IO address,
 446                    we'll reject a match unless it's what we're looking for.
 447                    Also reject it if the card is already in use.
 448                  */
 449
 450                 if ((irq && irq != dev->irq) ||
 451                     (base_addr && base_addr != dev->base_addr)) {
 452                         slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
 453                         continue;
 454                 }
 455                 if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) {
 456                         slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
 457                         continue;
 458                 }
 459
 460                 /* found what we're looking for... */
 461                 break;
 462         }
 463
 464         /* we didn't find any 3c523 in the slots we checked for */
 465         if (slot == MCA_NOTFOUND)
 466                 return ((base_addr || irq) ? -ENXIO : -ENODEV);
 467
 468         mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC");
 469         mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev);
 470
 471         /* if we get this far, adapter has been found - carry on */
 472         pr_info("%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1);
 473
 474         /* Now we extract configuration info from the card.
 475            The 3c523 provides information in two of the POS registers, but
 476            the second one is only needed if we want to tell the card what IRQ
 477            to use.  I suspect that whoever sets the thing up initially would
 478            prefer we don't screw with those things.
 479
 480            Note that we read the status info when we found the card...
 481
 482            See 3c523.h for more details.
 483          */
 484
 485         /* revision is stored in the first 4 bits of the revision register */
 486         revision = inb(dev->base_addr + ELMC_REVISION) & 0xf;
 487
 488         /* according to docs, we read the interrupt and write it back to
 489            the IRQ select register, since the POST might not configure the IRQ
 490            properly. */
 491         switch (dev->irq) {
 492         case 3:
 493                 mca_write_pos(slot, 3, 0x04);
 494                 break;
 495         case 7:
 496                 mca_write_pos(slot, 3, 0x02);
 497                 break;
 498         case 9:
 499                 mca_write_pos(slot, 3, 0x08);
 500                 break;
 501         case 12:
 502                 mca_write_pos(slot, 3, 0x01);
 503                 break;
 504         }
 505
 506         memset(pr, 0, sizeof(struct priv));
 507         pr->slot = slot;
 508
 509         pr_info("%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision,
 510                dev->base_addr);
 511
 512         /* Determine if we're using the on-board transceiver (i.e. coax) or
 513            an external one.  The information is pretty much useless, but I
 514            guess it's worth brownie points. */
 515         dev->if_port = (status & ELMC_STATUS_DISABLE_THIN);
 516
 517         /* The 3c523 has a 24K chunk of memory.  The first 16K is the
 518            shared memory, while the last 8K is for the EtherStart BIOS ROM.
 519            Which we don't care much about here.  We'll just tell Linux that
 520            we're using 16K.  MCA won't permit address space conflicts caused
 521            by not mapping the other 8K. */
 522         dev->mem_start = shm_table[(status & ELMC_STATUS_MEMORY_SELECT) >> 3];
 523
 524         /* We're using MCA, so it's a given that the information about memory
 525            size is correct.  The Crynwr drivers do something like this. */
 526
 527         elmc_id_reset586();     /* seems like a good idea before checking it... */
 528
 529         size = 0x4000;          /* check for 16K mem */
 530         if (!check586(dev, dev->mem_start, size)) {
 531                 pr_err("%s: memprobe, Can't find memory at 0x%lx!\n", dev->name,
 532                        dev->mem_start);
 533                 retval = -ENODEV;
 534                 goto err_out;
 535         }
 536         dev->mem_end = dev->mem_start + size;   /* set mem_end showed by 'ifconfig' */
 537
 538         pr->memtop = isa_bus_to_virt(dev->mem_start) + size;
 539         pr->base = (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
 540         alloc586(dev);
 541
 542         elmc_id_reset586();     /* make sure it doesn't generate spurious ints */
 543
 544         /* set number of receive-buffs according to memsize */
 545         pr->num_recv_buffs = NUM_RECV_BUFFS_16;
 546
 547         /* dump all the assorted information */
 548         pr_info("%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name,
 549                dev->irq, dev->if_port ? "ex" : "in",
 550                dev->mem_start, dev->mem_end - 1);
 551
 552         /* The hardware address for the 3c523 is stored in the first six
 553            bytes of the IO address. */
 554         for (i = 0; i < 6; i++)
 555                 dev->dev_addr[i] = inb(dev->base_addr + i);
 556
 557         pr_info("%s: hardware address %pM\n",
 558                dev->name, dev->dev_addr);
 559
 560         dev->netdev_ops = &netdev_ops;
 561         dev->watchdog_timeo = HZ;
 562         dev->ethtool_ops = &netdev_ethtool_ops;
 563
 564         /* note that we haven't actually requested the IRQ from the kernel.
 565            That gets done in elmc_open().  I'm not sure that's such a good idea,
 566            but it works, so I'll go with it. */
 567
 568 #ifndef ELMC_MULTICAST
 569         dev->flags&=~IFF_MULTICAST;     /* Multicast doesn't work */
 570 #endif
 571
 572         retval = register_netdev(dev);
 573         if (retval)
 574                 goto err_out;
 575
 576         return 0;
 577 err_out:
 578         mca_set_adapter_procfn(slot, NULL, NULL);
 579         release_region(dev->base_addr, ELMC_IO_EXTENT);
 580         return retval;
 581 }
 582
 583 #ifdef MODULE
 584 static void cleanup_card(struct net_device *dev)
 585 {
 586         mca_set_adapter_procfn(((struct priv *)netdev_priv(dev))->slot,
 587                                 NULL, NULL);
 588         release_region(dev->base_addr, ELMC_IO_EXTENT);
 589 }
 590 #else
 591 struct net_device * __init elmc_probe(int unit)
 592 {
 593         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
 594         int err;
 595
 596         if (!dev)
 597                 return ERR_PTR(-ENOMEM);
 598
 599         sprintf(dev->name, "eth%d", unit);
 600         netdev_boot_setup_check(dev);
 601
 602         err = do_elmc_probe(dev);
 603         if (err)
 604                 goto out;
 605         return dev;
 606 out:
 607         free_netdev(dev);
 608         return ERR_PTR(err);
 609 }
 610 #endif
 611
 612 /**********************************************
 613  * init the chip (elmc-interrupt should be disabled?!)
 614  * needs a correct 'allocated' memory
 615  */
 616
 617 static int init586(struct net_device *dev)
 618 {
 619         void *ptr;
 620         unsigned long s;
 621         int i, result = 0;
 622         struct priv *p = netdev_priv(dev);
 623         volatile struct configure_cmd_struct *cfg_cmd;
 624         volatile struct iasetup_cmd_struct *ias_cmd;
 625         volatile struct tdr_cmd_struct *tdr_cmd;
 626         volatile struct mcsetup_cmd_struct *mc_cmd;
 627         struct dev_mc_list *dmi;
 628         int num_addrs = netdev_mc_count(dev);
 629
 630         ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct));
 631
 632         cfg_cmd = (struct configure_cmd_struct *) ptr;  /* configure-command */
 633         cfg_cmd->cmd_status = 0;
 634         cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST;
 635         cfg_cmd->cmd_link = 0xffff;
 636
 637         cfg_cmd->byte_cnt = 0x0a;       /* number of cfg bytes */
 638         cfg_cmd->fifo = 0x08;   /* fifo-limit (8=tx:32/rx:64) */
 639         cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
 640         cfg_cmd->adr_len = 0x2e;        /* addr_len |!src_insert |pre-len |loopback */
 641         cfg_cmd->priority = 0x00;
 642         cfg_cmd->ifs = 0x60;
 643         cfg_cmd->time_low = 0x00;
 644         cfg_cmd->time_high = 0xf2;
 645         cfg_cmd->promisc = 0;
 646         if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC))
 647                 cfg_cmd->promisc = 1;
 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                 pr_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                 pr_warning("%s (elmc): individual address setup command failed: %04x\n",
 689                         dev->name, ias_cmd->cmd_status);
 690                 return 1;
 691         }
 692         /*
 693          * TDR, wire check .. e.g. no resistor e.t.c
 694          */
 695         tdr_cmd = (struct tdr_cmd_struct *) ptr;
 696
 697         tdr_cmd->cmd_status = 0;
 698         tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST;
 699         tdr_cmd->cmd_link = 0xffff;
 700         tdr_cmd->status = 0;
 701
 702         p->scb->cbl_offset = make16(tdr_cmd);
 703
 704         p->scb->cmd = CUC_START;        /* cmd.-unit start */
 705         elmc_attn586();
 706
 707         s = jiffies;
 708         while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
 709                 if (time_after(jiffies, s + 30*HZ/100)) {
 710                         pr_warning("%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
 711                         result = 1;
 712                         break;
 713                 }
 714         }
 715
 716         if (!result) {
 717                 DELAY(2);       /* wait for result */
 718                 result = tdr_cmd->status;
 719
 720                 p->scb->cmd = p->scb->status & STAT_MASK;
 721                 elmc_id_attn586();      /* ack the interrupts */
 722
 723                 if (result & TDR_LNK_OK) {
 724                         /* empty */
 725                 } else if (result & TDR_XCVR_PRB) {
 726                         pr_warning("%s: TDR: Transceiver problem!\n", dev->name);
 727                 } else if (result & TDR_ET_OPN) {
 728                         pr_warning("%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
 729                 } else if (result & TDR_ET_SRT) {
 730                         if (result & TDR_TIMEMASK)      /* time == 0 -> strange :-) */
 731                                 pr_warning("%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
 732                 } else {
 733                         pr_warning("%s: TDR: Unknown status %04x\n", dev->name, result);
 734                 }
 735         }
 736         /*
 737          * ack interrupts
 738          */
 739         p->scb->cmd = p->scb->status & STAT_MASK;
 740         elmc_id_attn586();
 741
 742         /*
 743          * alloc nop/xmit-cmds
 744          */
 745 #if (NUM_XMIT_BUFFS == 1)
 746         for (i = 0; i < 2; i++) {
 747                 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
 748                 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
 749                 p->nop_cmds[i]->cmd_status = 0;
 750                 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
 751                 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 752         }
 753         p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr;   /* transmit cmd/buff 0 */
 754         ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
 755 #else
 756         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 757                 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
 758                 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
 759                 p->nop_cmds[i]->cmd_status = 0;
 760                 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
 761                 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 762                 p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr;   /*transmit cmd/buff 0 */
 763                 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
 764         }
 765 #endif
 766
 767         ptr = alloc_rfa(dev, (void *) ptr);     /* init receive-frame-area */
 768
 769         /*
 770          * Multicast setup
 771          */
 772
 773         if (num_addrs) {
 774                 /* I don't understand this: do we really need memory after the init? */
 775                 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
 776                 if (len <= 0) {
 777                         pr_err("%s: Ooooops, no memory for MC-Setup!\n", dev->name);
 778                 } else {
 779                         if (len < num_addrs) {
 780                                 num_addrs = len;
 781                                 pr_warning("%s: Sorry, can only apply %d MC-Address(es).\n",
 782                                        dev->name, num_addrs);
 783                         }
 784                         mc_cmd = (struct mcsetup_cmd_struct *) ptr;
 785                         mc_cmd->cmd_status = 0;
 786                         mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
 787                         mc_cmd->cmd_link = 0xffff;
 788                         mc_cmd->mc_cnt = num_addrs * 6;
 789                         i = 0;
 790                         netdev_for_each_mc_addr(dmi, dev)
 791                                 memcpy((char *) mc_cmd->mc_list[i++], dmi->dmi_addr, 6);
 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                                 pr_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                         pr_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 = netdev_priv(dev);
 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 = netdev_priv(dev);
 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                                 pr_warning("%s: oops! CU has left active state. stat: %04x/%04x.\n",
 939                                         dev->name, (int) stat, (int) p->scb->status);
 940                         }
 941                 }
 942 #endif
 943
 944                 if (stat & STAT_RNR) {
 945                         /* RU went 'not ready' */
 946
 947                         if (p->scb->status & RU_SUSPEND) {
 948                                 /* special case: RU_SUSPEND */
 949
 950                                 WAIT_4_SCB_CMD();
 951                                 p->scb->cmd = RUC_RESUME;
 952                                 elmc_attn586();
 953                         } else {
 954                                 pr_warning("%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n",
 955                                         dev->name, (int) stat, (int) p->scb->status);
 956                                 elmc_rnr_int(dev);
 957                         }
 958                 }
 959                 WAIT_4_SCB_CMD();       /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
 960                 if (p->scb->cmd) {      /* timed out? */
 961                         break;
 962                 }
 963         }
 964         return IRQ_HANDLED;
 965 }
 966
 967 /*******************************************************
 968  * receive-interrupt
 969  */
 970
 971 static void elmc_rcv_int(struct net_device *dev)
 972 {
 973         int status;
 974         unsigned short totlen;
 975         struct sk_buff *skb;
 976         struct rbd_struct *rbd;
 977         struct priv *p = netdev_priv(dev);
 978
 979         for (; (status = p->rfd_top->status) & STAT_COMPL;) {
 980                 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
 981
 982                 if (status & STAT_OK) {         /* frame received without error? */
 983                         if ((totlen = rbd->status) & RBD_LAST) {        /* the first and the last buffer? */
 984                                 totlen &= RBD_MASK;     /* length of this frame */
 985                                 rbd->status = 0;
 986                                 skb = (struct sk_buff *) dev_alloc_skb(totlen + 2);
 987                                 if (skb != NULL) {
 988                                         skb_reserve(skb, 2);    /* 16 byte alignment */
 989                                         skb_put(skb,totlen);
 990                                         skb_copy_to_linear_data(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen);
 991                                         skb->protocol = eth_type_trans(skb, dev);
 992                                         netif_rx(skb);
 993                                         dev->stats.rx_packets++;
 994                                         dev->stats.rx_bytes += totlen;
 995                                 } else {
 996                                         dev->stats.rx_dropped++;
 997                                 }
 998                         } else {
 999                                 pr_warning("%s: received oversized frame.\n", dev->name);
1000                                 dev->stats.rx_dropped++;
1001                         }
1002                 } else {        /* frame !(ok), only with 'save-bad-frames' */
1003                         pr_warning("%s: oops! rfd-error-status: %04x\n", dev->name, status);
1004                         dev->stats.rx_errors++;
1005                 }
1006                 p->rfd_top->status = 0;
1007                 p->rfd_top->last = RFD_SUSP;
1008                 p->rfd_last->last = 0;  /* delete RU_SUSP  */
1009                 p->rfd_last = p->rfd_top;
1010                 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next);    /* step to next RFD */
1011         }
1012 }
1013
1014 /**********************************************************
1015  * handle 'Receiver went not ready'.
1016  */
1017
1018 static void elmc_rnr_int(struct net_device *dev)
1019 {
1020         struct priv *p = netdev_priv(dev);
1021
1022         dev->stats.rx_errors++;
1023
1024         WAIT_4_SCB_CMD();       /* wait for the last cmd */
1025         p->scb->cmd = RUC_ABORT;        /* usually the RU is in the 'no resource'-state .. abort it now. */
1026         elmc_attn586();
1027         WAIT_4_SCB_CMD();       /* wait for accept cmd. */
1028
1029         alloc_rfa(dev, (char *) p->rfd_first);
1030         startrecv586(dev);      /* restart RU */
1031
1032         pr_warning("%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status);
1033
1034 }
1035
1036 /**********************************************************
1037  * handle xmit - interrupt
1038  */
1039
1040 static void elmc_xmt_int(struct net_device *dev)
1041 {
1042         int status;
1043         struct priv *p = netdev_priv(dev);
1044
1045         status = p->xmit_cmds[p->xmit_last]->cmd_status;
1046         if (!(status & STAT_COMPL)) {
1047                 pr_warning("%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1048         }
1049         if (status & STAT_OK) {
1050                 dev->stats.tx_packets++;
1051                 dev->stats.collisions += (status & TCMD_MAXCOLLMASK);
1052         } else {
1053                 dev->stats.tx_errors++;
1054                 if (status & TCMD_LATECOLL) {
1055                         pr_warning("%s: late collision detected.\n", dev->name);
1056                         dev->stats.collisions++;
1057                 } else if (status & TCMD_NOCARRIER) {
1058                         dev->stats.tx_carrier_errors++;
1059                         pr_warning("%s: no carrier detected.\n", dev->name);
1060                 } else if (status & TCMD_LOSTCTS) {
1061                         pr_warning("%s: loss of CTS detected.\n", dev->name);
1062                 } else if (status & TCMD_UNDERRUN) {
1063                         dev->stats.tx_fifo_errors++;
1064                         pr_warning("%s: DMA underrun detected.\n", dev->name);
1065                 } else if (status & TCMD_MAXCOLL) {
1066                         pr_warning("%s: Max. collisions exceeded.\n", dev->name);
1067                         dev->stats.collisions += 16;
1068                 }
1069         }
1070
1071 #if (NUM_XMIT_BUFFS != 1)
1072         if ((++p->xmit_last) == NUM_XMIT_BUFFS) {
1073                 p->xmit_last = 0;
1074         }
1075 #endif
1076
1077         netif_wake_queue(dev);
1078 }
1079
1080 /***********************************************************
1081  * (re)start the receiver
1082  */
1083
1084 static void startrecv586(struct net_device *dev)
1085 {
1086         struct priv *p = netdev_priv(dev);
1087
1088         p->scb->rfa_offset = make16(p->rfd_first);
1089         p->scb->cmd = RUC_START;
1090         elmc_attn586();         /* start cmd. */
1091         WAIT_4_SCB_CMD();       /* wait for accept cmd. (no timeout!!) */
1092 }
1093
1094 /******************************************************
1095  * timeout
1096  */
1097
1098 static void elmc_timeout(struct net_device *dev)
1099 {
1100         struct priv *p = netdev_priv(dev);
1101         /* COMMAND-UNIT active? */
1102         if (p->scb->status & CU_ACTIVE) {
1103                 pr_debug("%s: strange ... timeout with CU active?!?\n", dev->name);
1104                 pr_debug("%s: X0: %04x N0: %04x N1: %04x %d\n", dev->name,
1105                         (int)p->xmit_cmds[0]->cmd_status,
1106                         (int)p->nop_cmds[0]->cmd_status,
1107                         (int)p->nop_cmds[1]->cmd_status, (int)p->nop_point);
1108                 p->scb->cmd = CUC_ABORT;
1109                 elmc_attn586();
1110                 WAIT_4_SCB_CMD();
1111                 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
1112                 p->scb->cmd = CUC_START;
1113                 elmc_attn586();
1114                 WAIT_4_SCB_CMD();
1115                 netif_wake_queue(dev);
1116         } else {
1117                 pr_debug("%s: xmitter timed out, try to restart! stat: %04x\n",
1118                         dev->name, p->scb->status);
1119                 pr_debug("%s: command-stats: %04x %04x\n", dev->name,
1120                         p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status);
1121                 elmc_close(dev);
1122                 elmc_open(dev);
1123         }
1124 }
1125
1126 /******************************************************
1127  * send frame
1128  */
1129
1130 static netdev_tx_t elmc_send_packet(struct sk_buff *skb, struct net_device *dev)
1131 {
1132         int len;
1133         int i;
1134 #ifndef NO_NOPCOMMANDS
1135         int next_nop;
1136 #endif
1137         struct priv *p = netdev_priv(dev);
1138
1139         netif_stop_queue(dev);
1140
1141         len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
1142
1143         if (len != skb->len)
1144                 memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
1145         skb_copy_from_linear_data(skb, (char *) p->xmit_cbuffs[p->xmit_count], skb->len);
1146
1147 #if (NUM_XMIT_BUFFS == 1)
1148 #ifdef NO_NOPCOMMANDS
1149         p->xmit_buffs[0]->size = TBD_LAST | len;
1150         for (i = 0; i < 16; i++) {
1151                 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1152                 p->scb->cmd = CUC_START;
1153                 p->xmit_cmds[0]->cmd_status = 0;
1154                         elmc_attn586();
1155                 dev->trans_start = jiffies;
1156                 if (!i) {
1157                         dev_kfree_skb(skb);
1158                 }
1159                 WAIT_4_SCB_CMD();
1160                 if ((p->scb->status & CU_ACTIVE)) {     /* test it, because CU sometimes doesn't start immediately */
1161                         break;
1162                 }
1163                 if (p->xmit_cmds[0]->cmd_status) {
1164                         break;
1165                 }
1166                 if (i == 15) {
1167                         pr_warning("%s: Can't start transmit-command.\n", dev->name);
1168                 }
1169         }
1170 #else
1171         next_nop = (p->nop_point + 1) & 0x1;
1172         p->xmit_buffs[0]->size = TBD_LAST | len;
1173
1174         p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1175             = make16((p->nop_cmds[next_nop]));
1176         p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1177
1178         p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1179         dev->trans_start = jiffies;
1180         p->nop_point = next_nop;
1181         dev_kfree_skb(skb);
1182 #endif
1183 #else
1184         p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
1185         if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) {
1186                 next_nop = 0;
1187         }
1188         p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1189         p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1190             = make16((p->nop_cmds[next_nop]));
1191         p->nop_cmds[next_nop]->cmd_status = 0;
1192                 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1193         dev->trans_start = jiffies;
1194         p->xmit_count = next_nop;
1195         if (p->xmit_count != p->xmit_last)
1196                 netif_wake_queue(dev);
1197         dev_kfree_skb(skb);
1198 #endif
1199         return NETDEV_TX_OK;
1200 }
1201
1202 /*******************************************
1203  * Someone wanna have the statistics
1204  */
1205
1206 static struct net_device_stats *elmc_get_stats(struct net_device *dev)
1207 {
1208         struct priv *p = netdev_priv(dev);
1209         unsigned short crc, aln, rsc, ovrn;
1210
1211         crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
1212         p->scb->crc_errs -= crc;
1213         aln = p->scb->aln_errs;
1214         p->scb->aln_errs -= aln;
1215         rsc = p->scb->rsc_errs;
1216         p->scb->rsc_errs -= rsc;
1217         ovrn = p->scb->ovrn_errs;
1218         p->scb->ovrn_errs -= ovrn;
1219
1220         dev->stats.rx_crc_errors += crc;
1221         dev->stats.rx_fifo_errors += ovrn;
1222         dev->stats.rx_frame_errors += aln;
1223         dev->stats.rx_dropped += rsc;
1224
1225         return &dev->stats;
1226 }
1227
1228 /********************************************************
1229  * Set MC list ..
1230  */
1231
1232 #ifdef ELMC_MULTICAST
1233 static void set_multicast_list(struct net_device *dev)
1234 {
1235         if (!dev->start) {
1236                 /* without a running interface, promiscuous doesn't work */
1237                 return;
1238         }
1239         dev->start = 0;
1240         alloc586(dev);
1241         init586(dev);
1242         startrecv586(dev);
1243         dev->start = 1;
1244 }
1245 #endif
1246
1247 static void netdev_get_drvinfo(struct net_device *dev,
1248                                struct ethtool_drvinfo *info)
1249 {
1250         strcpy(info->driver, DRV_NAME);
1251         strcpy(info->version, DRV_VERSION);
1252         sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr);
1253 }
1254
1255 static const struct ethtool_ops netdev_ethtool_ops = {
1256         .get_drvinfo            = netdev_get_drvinfo,
1257 };
1258
1259 #ifdef MODULE
1260
1261 /* Increase if needed ;) */
1262 #define MAX_3C523_CARDS 4
1263
1264 static struct net_device *dev_elmc[MAX_3C523_CARDS];
1265 static int irq[MAX_3C523_CARDS];
1266 static int io[MAX_3C523_CARDS];
1267 module_param_array(irq, int, NULL, 0);
1268 module_param_array(io, int, NULL, 0);
1269 MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)");
1270 MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)");
1271 MODULE_LICENSE("GPL");
1272
1273 int __init init_module(void)
1274 {
1275         int this_dev,found = 0;
1276
1277         /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */
1278         for(this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1279                 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
1280                 if (!dev)
1281                         break;
1282                 dev->irq=irq[this_dev];
1283                 dev->base_addr=io[this_dev];
1284                 if (do_elmc_probe(dev) == 0) {
1285                         dev_elmc[this_dev] = dev;
1286                         found++;
1287                         continue;
1288                 }
1289                 free_netdev(dev);
1290                 if (io[this_dev]==0)
1291                         break;
1292                 pr_warning("3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]);
1293         }
1294
1295         if(found==0) {
1296                 if (io[0]==0)
1297                         pr_notice("3c523.c: No 3c523 cards found\n");
1298                 return -ENXIO;
1299         } else return 0;
1300 }
1301
1302 void __exit cleanup_module(void)
1303 {
1304         int this_dev;
1305         for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1306                 struct net_device *dev = dev_elmc[this_dev];
1307                 if (dev) {
1308                         unregister_netdev(dev);
1309                         cleanup_card(dev);
1310                         free_netdev(dev);
1311                 }
1312         }
1313 }
1314
1315 #endif                          /* MODULE */