drivers/net/ni52.c

   1 /*
   2  * net-3-driver for the NI5210 card (i82586 Ethernet chip)
   3  *
   4  * This is an extension to the Linux operating system, and is covered by the
   5  * same GNU General Public License that covers that work.
   6  *
   7  * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
   8  * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
   9  *    [feel free to mail ....]
  10  *
  11  * when using as module: (no autoprobing!)
  12  *   compile with:
  13  *       gcc -O2 -fomit-frame-pointer -m486 -D__KERNEL__ -DMODULE -c ni52.c
  14  *   run with e.g:
  15  *       insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000
  16  *
  17  * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!.
  18  *
  19  * If you find a bug, please report me:
  20  *   The kernel panic output and any kmsg from the ni52 driver
  21  *   the ni5210-driver-version and the linux-kernel version
  22  *   how many shared memory (memsize) on the netcard,
  23  *   bootprom: yes/no, base_addr, mem_start
  24  *   maybe the ni5210-card revision and the i82586 version
  25  *
  26  * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340
  27  *                mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000,
  28  *                           0xd8000,0xcc000,0xce000,0xda000,0xdc000
  29  *
  30  * sources:
  31  *   skeleton.c from Donald Becker
  32  *
  33  * I have also done a look in the following sources: (mail me if you need them)
  34  *   crynwr-packet-driver by Russ Nelson
  35  *   Garret A. Wollman's (fourth) i82586-driver for BSD
  36  *   (before getting an i82596 (yes 596 not 586) manual, the existing drivers
  37  *    helped me a lot to understand this tricky chip.)
  38  *
  39  * Known Problems:
  40  *   The internal sysbus seems to be slow. So we often lose packets because of
  41  *   overruns while receiving from a fast remote host.
  42  *   This can slow down TCP connections. Maybe the newer ni5210 cards are
  43  *   better. My experience is, that if a machine sends with more than about
  44  *   500-600K/s the fifo/sysbus overflows.
  45  *
  46  * IMPORTANT NOTE:
  47  *   On fast networks, it's a (very) good idea to have 16K shared memory. With
  48  *   8K, we can store only 4 receive frames, so it can (easily) happen that a
  49  *   remote machine 'overruns' our system.
  50  *
  51  * Known i82586/card problems (I'm sure, there are many more!):
  52  *   Running the NOP-mode, the i82586 sometimes seems to forget to report
  53  *   every xmit-interrupt until we restart the CU.
  54  *   Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit
  55  *   in the RBD-Struct which indicates an end of the RBD queue.
  56  *   Instead, the RU fetches another (randomly selected and
  57  *   usually used) RBD and begins to fill it. (Maybe, this happens only if
  58  *   the last buffer from the previous RFD fits exact into the queue and
  59  *   the next RFD can't fetch an initial RBD. Anyone knows more? )
  60  *
  61  * results from ftp performance tests with Linux 1.2.5
  62  *   send and receive about 350-400 KByte/s (peak up to 460 kbytes/s)
  63  *   sending in NOP-mode: peak performance up to 530K/s (but better don't
  64  *   run this mode)
  65  */
  66
  67 /*
  68  * 29.Sept.96: virt_to_bus changes for new memory scheme
  69  * 19.Feb.96: more Mcast changes, module support (MH)
  70  *
  71  * 18.Nov.95: Mcast changes (AC).
  72  *
  73  * 23.April.95: fixed(?) receiving problems by configuring a RFD more
  74  *              than the number of RBD's. Can maybe cause other problems.
  75  * 18.April.95: Added MODULE support (MH)
  76  * 17.April.95: MC related changes in init586() and set_multicast_list().
  77  *              removed use of 'jiffies' in init586() (MH)
  78  *
  79  * 19.Sep.94: Added Multicast support (not tested yet) (MH)
  80  *
  81  * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling.
  82  *            Now, every RFD has exact one RBD. (MH)
  83  *
  84  * 14.Sep.94: added promiscuous mode, a few cleanups (MH)
  85  *
  86  * 19.Aug.94: changed request_irq() parameter (MH)
  87  *
  88  * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)
  89  *
  90  * 19.July.94: lotsa cleanups .. (MH)
  91  *
  92  * 17.July.94: some patches ... verified to run with 1.1.29 (MH)
  93  *
  94  * 4.July.94: patches for Linux 1.1.24  (MH)
  95  *
  96  * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)
  97  *
  98  * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff,
  99  *                              too (MH)
 100  *
 101  * < 30.Sep.93: first versions
 102  */
 103
 104 static int debuglevel;  /* debug-printk 0: off 1: a few 2: more */
 105 static int automatic_resume; /* experimental .. better should be zero */
 106 static int rfdadd;      /* rfdadd=1 may be better for 8K MEM cards */
 107 static int fifo = 0x8;  /* don't change */
 108
 109 #include <linux/module.h>
 110 #include <linux/kernel.h>
 111 #include <linux/string.h>
 112 #include <linux/errno.h>
 113 #include <linux/ioport.h>
 114 #include <linux/slab.h>
 115 #include <linux/interrupt.h>
 116 #include <linux/delay.h>
 117 #include <linux/init.h>
 118 #include <linux/bitops.h>
 119 #include <asm/io.h>
 120
 121 #include <linux/netdevice.h>
 122 #include <linux/etherdevice.h>
 123 #include <linux/skbuff.h>
 124
 125 #include "ni52.h"
 126
 127 #define DRV_NAME "ni52"
 128
 129 #define DEBUG       /* debug on */
 130 #define SYSBUSVAL 1 /* 8 Bit */
 131
 132 #define ni_attn586()  { outb(0, dev->base_addr + NI52_ATTENTION); }
 133 #define ni_reset586() { outb(0, dev->base_addr + NI52_RESET); }
 134 #define ni_disint()   { outb(0, dev->base_addr + NI52_INTDIS); }
 135 #define ni_enaint()   { outb(0, dev->base_addr + NI52_INTENA); }
 136
 137 #define make32(ptr16) (p->memtop + (short) (ptr16))
 138 #define make24(ptr32) ((char __iomem *)(ptr32)) - p->base
 139 #define make16(ptr32) ((unsigned short) ((char __iomem *)(ptr32)\
 140                                         - p->memtop))
 141
 142 /******************* how to calculate the buffers *****************************
 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 these 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 #define NO_NOPCOMMANDS      /* only possible with NUM_XMIT_BUFFS=1 */
 162
 163 /**************************************************************************/
 164
 165
 166 #define NI52_TOTAL_SIZE 16
 167 #define NI52_ADDR0 0x02
 168 #define NI52_ADDR1 0x07
 169 #define NI52_ADDR2 0x01
 170
 171 static int     ni52_probe1(struct net_device *dev, int ioaddr);
 172 static irqreturn_t ni52_interrupt(int irq, void *dev_id);
 173 static int     ni52_open(struct net_device *dev);
 174 static int     ni52_close(struct net_device *dev);
 175 static int     ni52_send_packet(struct sk_buff *, struct net_device *);
 176 static struct  net_device_stats *ni52_get_stats(struct net_device *dev);
 177 static void    set_multicast_list(struct net_device *dev);
 178 static void    ni52_timeout(struct net_device *dev);
 179
 180 /* helper-functions */
 181 static int     init586(struct net_device *dev);
 182 static int     check586(struct net_device *dev, unsigned size);
 183 static void    alloc586(struct net_device *dev);
 184 static void    startrecv586(struct net_device *dev);
 185 static void   __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr);
 186 static void    ni52_rcv_int(struct net_device *dev);
 187 static void    ni52_xmt_int(struct net_device *dev);
 188 static void    ni52_rnr_int(struct net_device *dev);
 189
 190 struct priv {
 191         struct net_device_stats stats;
 192         char __iomem *base;
 193         char __iomem *mapped;
 194         char __iomem *memtop;
 195         spinlock_t spinlock;
 196         int reset;
 197         struct rfd_struct __iomem *rfd_last, *rfd_top, *rfd_first;
 198         struct scp_struct __iomem *scp;
 199         struct iscp_struct __iomem *iscp;
 200         struct scb_struct __iomem *scb;
 201         struct tbd_struct __iomem *xmit_buffs[NUM_XMIT_BUFFS];
 202 #if (NUM_XMIT_BUFFS == 1)
 203         struct transmit_cmd_struct __iomem *xmit_cmds[2];
 204         struct nop_cmd_struct __iomem *nop_cmds[2];
 205 #else
 206         struct transmit_cmd_struct __iomem *xmit_cmds[NUM_XMIT_BUFFS];
 207         struct nop_cmd_struct __iomem *nop_cmds[NUM_XMIT_BUFFS];
 208 #endif
 209         int nop_point, num_recv_buffs;
 210         char __iomem *xmit_cbuffs[NUM_XMIT_BUFFS];
 211         int xmit_count, xmit_last;
 212 };
 213
 214 /* wait for command with timeout: */
 215 static void wait_for_scb_cmd(struct net_device *dev)
 216 {
 217         struct priv *p = dev->priv;
 218         int i;
 219         for (i = 0; i < 16384; i++) {
 220                 if (readb(&p->scb->cmd_cuc) == 0)
 221                       break;
 222                 udelay(4);
 223                 if (i == 16383) {
 224                         printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",
 225                                 dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus));
 226                         if (!p->reset) {
 227                                 p->reset = 1;
 228                                 ni_reset586();
 229                         }
 230                 }
 231         }
 232 }
 233
 234 static void wait_for_scb_cmd_ruc(struct net_device *dev)
 235 {
 236         struct priv *p = dev->priv;
 237         int i;
 238         for (i = 0; i < 16384; i++) {
 239                 if (readb(&p->scb->cmd_ruc) == 0)
 240                         break;
 241                 udelay(4);
 242                 if (i == 16383) {
 243                         printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",
 244                                 dev->name, p->scb->cmd_ruc, p->scb->rus);
 245                         if (!p->reset) {
 246                                 p->reset = 1;
 247                                 ni_reset586();
 248                         }
 249                 }
 250         }
 251 }
 252
 253 static void wait_for_stat_compl(void __iomem *p)
 254 {
 255         struct nop_cmd_struct __iomem *addr = p;
 256         int i;
 257         for (i = 0; i < 32767; i++) {
 258                 if (readw(&((addr)->cmd_status)) & STAT_COMPL)
 259                         break;
 260                 udelay(32);
 261         }
 262 }
 263
 264 /**********************************************
 265  * close device
 266  */
 267 static int ni52_close(struct net_device *dev)
 268 {
 269         free_irq(dev->irq, dev);
 270         ni_reset586(); /* the hard way to stop the receiver */
 271         netif_stop_queue(dev);
 272         return 0;
 273 }
 274
 275 /**********************************************
 276  * open device
 277  */
 278 static int ni52_open(struct net_device *dev)
 279 {
 280         int ret;
 281
 282         ni_disint();
 283         alloc586(dev);
 284         init586(dev);
 285         startrecv586(dev);
 286         ni_enaint();
 287
 288         ret = request_irq(dev->irq, &ni52_interrupt, 0, dev->name, dev);
 289         if (ret) {
 290                 ni_reset586();
 291                 return ret;
 292         }
 293         netif_start_queue(dev);
 294         return 0; /* most done by init */
 295 }
 296
 297 static int check_iscp(struct net_device *dev, void __iomem *addr)
 298 {
 299         struct iscp_struct __iomem *iscp = addr;
 300         struct priv *p = dev->priv;
 301         memset_io(iscp, 0, sizeof(struct iscp_struct));
 302
 303         writel(make24(iscp), &p->scp->iscp);
 304         writeb(1, &iscp->busy);
 305
 306         ni_reset586();
 307         ni_attn586();
 308         mdelay(32);     /* wait a while... */
 309         /* i82586 clears 'busy' after successful init */
 310         if (readb(&iscp->busy))
 311                 return 0;
 312         return 1;
 313 }
 314
 315 /**********************************************
 316  * Check to see if there's an 82586 out there.
 317  */
 318 static int check586(struct net_device *dev, unsigned size)
 319 {
 320         struct priv *p = dev->priv;
 321         int i;
 322
 323         p->mapped = (char __iomem *)isa_bus_to_virt(dev->mem_start);
 324         p->base = p->mapped + size - 0x01000000;
 325         p->memtop = p->mapped + size;
 326         p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
 327         p->scb  = (struct scb_struct __iomem *) p->mapped;
 328         p->iscp = (struct iscp_struct __iomem *)p->scp - 1;
 329         memset_io(p->scp, 0, sizeof(struct scp_struct));
 330         for (i = 0; i < sizeof(struct scp_struct); i++)
 331                 /* memory was writeable? */
 332                 if (readb((char __iomem *)p->scp + i))
 333                         return 0;
 334         writeb(SYSBUSVAL, &p->scp->sysbus);     /* 1 = 8Bit-Bus, 0 = 16 Bit */
 335         if (readb(&p->scp->sysbus) != SYSBUSVAL)
 336                 return 0;
 337
 338         if (!check_iscp(dev, p->mapped))
 339                 return 0;
 340         if (!check_iscp(dev, p->iscp))
 341                 return 0;
 342         return 1;
 343 }
 344
 345 /******************************************************************
 346  * set iscp at the right place, called by ni52_probe1 and open586.
 347  */
 348 static void alloc586(struct net_device *dev)
 349 {
 350         struct priv *p =        (struct priv *) dev->priv;
 351
 352         ni_reset586();
 353         mdelay(32);
 354
 355         memset_io(p->iscp, 0, sizeof(struct iscp_struct));
 356         memset_io(p->scp , 0, sizeof(struct scp_struct));
 357
 358         writel(make24(p->iscp), &p->scp->iscp);
 359         writeb(SYSBUSVAL, &p->scp->sysbus);
 360         writew(make16(p->scb), &p->iscp->scb_offset);
 361
 362         writeb(1, &p->iscp->busy);
 363         ni_reset586();
 364         ni_attn586();
 365
 366         mdelay(32);
 367
 368         if (readb(&p->iscp->busy))
 369                 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
 370
 371         p->reset = 0;
 372
 373         memset_io(p->scb, 0, sizeof(struct scb_struct));
 374 }
 375
 376 /* set: io,irq,memstart,memend or set it when calling insmod */
 377 static int irq = 9;
 378 static int io = 0x300;
 379 static long memstart;   /* e.g 0xd0000 */
 380 static long memend;     /* e.g 0xd4000 */
 381
 382 /**********************************************
 383  * probe the ni5210-card
 384  */
 385 struct net_device * __init ni52_probe(int unit)
 386 {
 387         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
 388         static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
 389         int *port;
 390         int err = 0;
 391
 392         if (!dev)
 393                 return ERR_PTR(-ENOMEM);
 394
 395         if (unit >= 0) {
 396                 sprintf(dev->name, "eth%d", unit);
 397                 netdev_boot_setup_check(dev);
 398                 io = dev->base_addr;
 399                 irq = dev->irq;
 400                 memstart = dev->mem_start;
 401                 memend = dev->mem_end;
 402         }
 403
 404         if (io > 0x1ff) {       /* Check a single specified location. */
 405                 err = ni52_probe1(dev, io);
 406         } else if (io > 0) {            /* Don't probe at all. */
 407                 err = -ENXIO;
 408         } else {
 409                 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
 410                         ;
 411                 if (*port)
 412                         goto got_it;
 413 #ifdef FULL_IO_PROBE
 414                 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
 415                         ;
 416                 if (io < 0x400)
 417                         goto got_it;
 418 #endif
 419                 err = -ENODEV;
 420         }
 421         if (err)
 422                 goto out;
 423 got_it:
 424         err = register_netdev(dev);
 425         if (err)
 426                 goto out1;
 427         return dev;
 428 out1:
 429         release_region(dev->base_addr, NI52_TOTAL_SIZE);
 430 out:
 431         free_netdev(dev);
 432         return ERR_PTR(err);
 433 }
 434
 435 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
 436 {
 437         int i, size, retval;
 438         struct priv *priv = dev->priv;
 439
 440         dev->base_addr = ioaddr;
 441         dev->irq = irq;
 442         dev->mem_start = memstart;
 443         dev->mem_end = memend;
 444
 445         spin_lock_init(&priv->spinlock);
 446
 447         if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
 448                 return -EBUSY;
 449
 450         if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
 451             !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
 452                 retval = -ENODEV;
 453                 goto out;
 454         }
 455
 456         for (i = 0; i < ETH_ALEN; i++)
 457                 dev->dev_addr[i] = inb(dev->base_addr+i);
 458
 459         if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
 460                  || dev->dev_addr[2] != NI52_ADDR2) {
 461                 retval = -ENODEV;
 462                 goto out;
 463         }
 464
 465         printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
 466                                 dev->name, dev->base_addr);
 467
 468         /*
 469          * check (or search) IO-Memory, 8K and 16K
 470          */
 471 #ifdef MODULE
 472         size = dev->mem_end - dev->mem_start;
 473         if (size != 0x2000 && size != 0x4000) {
 474                 printk("\n");
 475                 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
 476                 retval = -ENODEV;
 477                 goto out;
 478         }
 479         if (!check586(dev, size)) {
 480                 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
 481                 retval = -ENODEV;
 482                 goto out;
 483         }
 484 #else
 485         if (dev->mem_start != 0) {
 486                 /* no auto-mem-probe */
 487                 size = 0x4000; /* check for 16K mem */
 488                 if (!check586(dev, size)) {
 489                         size = 0x2000; /* check for 8K mem */
 490                         if (!check586(dev, size)) {
 491                                 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
 492                                 retval = -ENODEV;
 493                                 goto out;
 494                         }
 495                 }
 496         } else {
 497                 static const unsigned long memaddrs[] = {
 498                         0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
 499                         0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
 500                 };
 501                 for (i = 0;; i++) {
 502                         if (!memaddrs[i]) {
 503                                 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
 504                                 retval = -ENODEV;
 505                                 goto out;
 506                         }
 507                         dev->mem_start = memaddrs[i];
 508                         size = 0x2000; /* check for 8K mem */
 509                         if (check586(dev, size))
 510                                 /* 8K-check */
 511                                 break;
 512                         size = 0x4000; /* check for 16K mem */
 513                         if (check586(dev, size))
 514                                 /* 16K-check */
 515                                 break;
 516                 }
 517         }
 518         /* set mem_end showed by 'ifconfig' */
 519         dev->mem_end = dev->mem_start + size;
 520 #endif
 521
 522         alloc586(dev);
 523
 524         /* set number of receive-buffs according to memsize */
 525         if (size == 0x2000)
 526                 priv->num_recv_buffs = NUM_RECV_BUFFS_8;
 527         else
 528                 priv->num_recv_buffs = NUM_RECV_BUFFS_16;
 529
 530         printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
 531                                 dev->mem_start, size);
 532
 533         if (dev->irq < 2) {
 534                 unsigned long irq_mask;
 535
 536                 irq_mask = probe_irq_on();
 537                 ni_reset586();
 538                 ni_attn586();
 539
 540                 mdelay(20);
 541                 dev->irq = probe_irq_off(irq_mask);
 542                 if (!dev->irq) {
 543                         printk("?autoirq, Failed to detect IRQ line!\n");
 544                         retval = -EAGAIN;
 545                         goto out;
 546                 }
 547                 printk("IRQ %d (autodetected).\n", dev->irq);
 548         } else {
 549                 if (dev->irq == 2)
 550                         dev->irq = 9;
 551                 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
 552         }
 553
 554         dev->open               = ni52_open;
 555         dev->stop               = ni52_close;
 556         dev->get_stats          = ni52_get_stats;
 557         dev->tx_timeout         = ni52_timeout;
 558         dev->watchdog_timeo     = HZ/20;
 559         dev->hard_start_xmit    = ni52_send_packet;
 560         dev->set_multicast_list = set_multicast_list;
 561
 562         dev->if_port            = 0;
 563
 564         return 0;
 565 out:
 566         release_region(ioaddr, NI52_TOTAL_SIZE);
 567         return retval;
 568 }
 569
 570 /**********************************************
 571  * init the chip (ni52-interrupt should be disabled?!)
 572  * needs a correct 'allocated' memory
 573  */
 574
 575 static int init586(struct net_device *dev)
 576 {
 577         void __iomem *ptr;
 578         int i, result = 0;
 579         struct priv *p = (struct priv *)dev->priv;
 580         struct configure_cmd_struct __iomem *cfg_cmd;
 581         struct iasetup_cmd_struct __iomem *ias_cmd;
 582         struct tdr_cmd_struct __iomem *tdr_cmd;
 583         struct mcsetup_cmd_struct __iomem *mc_cmd;
 584         struct dev_mc_list *dmi = dev->mc_list;
 585         int num_addrs = dev->mc_count;
 586
 587         ptr = p->scb + 1;
 588
 589         cfg_cmd = ptr; /* configure-command */
 590         writew(0, &cfg_cmd->cmd_status);
 591         writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
 592         writew(0xFFFF, &cfg_cmd->cmd_link);
 593
 594         /* number of cfg bytes */
 595         writeb(0x0a, &cfg_cmd->byte_cnt);
 596         /* fifo-limit (8=tx:32/rx:64) */
 597         writeb(fifo, &cfg_cmd->fifo);
 598         /* hold or discard bad recv frames (bit 7) */
 599         writeb(0x40, &cfg_cmd->sav_bf);
 600         /* addr_len |!src_insert |pre-len |loopback */
 601         writeb(0x2e, &cfg_cmd->adr_len);
 602         writeb(0x00, &cfg_cmd->priority);
 603         writeb(0x60, &cfg_cmd->ifs);;
 604         writeb(0x00, &cfg_cmd->time_low);
 605         writeb(0xf2, &cfg_cmd->time_high);
 606         writeb(0x00, &cfg_cmd->promisc);;
 607         if (dev->flags & IFF_ALLMULTI) {
 608                 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
 609                 if (num_addrs > len) {
 610                         printk(KERN_ERR "%s: switching to promisc. mode\n",
 611                                 dev->name);
 612                         dev->flags |= IFF_PROMISC;
 613                 }
 614         }
 615         if (dev->flags & IFF_PROMISC)
 616                 writeb(0x01, &cfg_cmd->promisc);
 617         writeb(0x00, &cfg_cmd->carr_coll);
 618         writew(make16(cfg_cmd), &p->scb->cbl_offset);
 619         writew(0, &p->scb->cmd_ruc);
 620
 621         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 622         ni_attn586();
 623
 624         wait_for_stat_compl(cfg_cmd);
 625
 626         if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 627                                                         (STAT_COMPL|STAT_OK)) {
 628                 printk(KERN_ERR "%s: configure command failed: %x\n",
 629                                 dev->name, readw(&cfg_cmd->cmd_status));
 630                 return 1;
 631         }
 632
 633         /*
 634          * individual address setup
 635          */
 636
 637         ias_cmd = ptr;
 638
 639         writew(0, &ias_cmd->cmd_status);
 640         writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
 641         writew(0xffff, &ias_cmd->cmd_link);
 642
 643         memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
 644
 645         writew(make16(ias_cmd), &p->scb->cbl_offset);
 646
 647         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 648         ni_attn586();
 649
 650         wait_for_stat_compl(ias_cmd);
 651
 652         if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 653                                                         (STAT_OK|STAT_COMPL)) {
 654                 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
 655                 return 1;
 656         }
 657
 658         /*
 659          * TDR, wire check .. e.g. no resistor e.t.c
 660          */
 661
 662         tdr_cmd = ptr;
 663
 664         writew(0, &tdr_cmd->cmd_status);
 665         writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
 666         writew(0xffff, &tdr_cmd->cmd_link);
 667         writew(0, &tdr_cmd->status);
 668
 669         writew(make16(tdr_cmd), &p->scb->cbl_offset);
 670         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 671         ni_attn586();
 672
 673         wait_for_stat_compl(tdr_cmd);
 674
 675         if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
 676                 printk(KERN_ERR "%s: Problems while running the TDR.\n",
 677                                 dev->name);
 678         else {
 679                 udelay(16);
 680                 result = readw(&tdr_cmd->status);
 681                 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 682                 ni_attn586(); /* ack the interrupts */
 683
 684                 if (result & TDR_LNK_OK)
 685                         ;
 686                 else if (result & TDR_XCVR_PRB)
 687                         printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
 688                                 dev->name);
 689                 else if (result & TDR_ET_OPN)
 690                         printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
 691                                 dev->name, result & TDR_TIMEMASK);
 692                 else if (result & TDR_ET_SRT) {
 693                         /* time == 0 -> strange :-) */
 694                         if (result & TDR_TIMEMASK)
 695                                 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
 696                                         dev->name, result & TDR_TIMEMASK);
 697                 } else
 698                         printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
 699                                                 dev->name, result);
 700         }
 701
 702         /*
 703          * Multicast setup
 704          */
 705         if (num_addrs && !(dev->flags & IFF_PROMISC)) {
 706                 mc_cmd = ptr;
 707                 writew(0, &mc_cmd->cmd_status);
 708                 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
 709                 writew(0xffff, &mc_cmd->cmd_link);
 710                 writew(num_addrs * 6, &mc_cmd->mc_cnt);
 711
 712                 for (i = 0; i < num_addrs; i++, dmi = dmi->next)
 713                         memcpy_toio(mc_cmd->mc_list[i],
 714                                                         dmi->dmi_addr, 6);
 715
 716                 writew(make16(mc_cmd), &p->scb->cbl_offset);
 717                 writeb(CUC_START, &p->scb->cmd_cuc);
 718                 ni_attn586();
 719
 720                 wait_for_stat_compl(mc_cmd);
 721
 722                 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
 723                                                  != (STAT_COMPL|STAT_OK))
 724                         printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
 725         }
 726
 727         /*
 728          * alloc nop/xmit-cmds
 729          */
 730 #if (NUM_XMIT_BUFFS == 1)
 731         for (i = 0; i < 2; i++) {
 732                 p->nop_cmds[i] = ptr;
 733                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 734                 writew(0, &p->nop_cmds[i]->cmd_status);
 735                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 736                 ptr = ptr + sizeof(struct nop_cmd_struct);
 737         }
 738 #else
 739         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 740                 p->nop_cmds[i] = ptr;
 741                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 742                 writew(0, &p->nop_cmds[i]->cmd_status);
 743                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 744                 ptr = ptr + sizeof(struct nop_cmd_struct);
 745         }
 746 #endif
 747
 748         ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
 749
 750         /*
 751          * alloc xmit-buffs / init xmit_cmds
 752          */
 753         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 754                 /* Transmit cmd/buff 0 */
 755                 p->xmit_cmds[i] = ptr;
 756                 ptr = ptr + sizeof(struct transmit_cmd_struct);
 757                 p->xmit_cbuffs[i] = ptr; /* char-buffs */
 758                 ptr = ptr + XMIT_BUFF_SIZE;
 759                 p->xmit_buffs[i] = ptr; /* TBD */
 760                 ptr = ptr + sizeof(struct tbd_struct);
 761                 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
 762                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
 763                                 dev->name);
 764                         return 1;
 765                 }
 766                 memset_io(p->xmit_cmds[i], 0,
 767                                         sizeof(struct transmit_cmd_struct));
 768                 memset_io(p->xmit_buffs[i], 0,
 769                                         sizeof(struct tbd_struct));
 770                 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
 771                                         &p->xmit_cmds[i]->cmd_link);
 772                 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
 773                 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
 774                 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
 775                 writew(0xffff, &p->xmit_buffs[i]->next);
 776                 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
 777         }
 778
 779         p->xmit_count = 0;
 780         p->xmit_last    = 0;
 781 #ifndef NO_NOPCOMMANDS
 782         p->nop_point    = 0;
 783 #endif
 784
 785          /*
 786                 * 'start transmitter'
 787                 */
 788 #ifndef NO_NOPCOMMANDS
 789         writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
 790         writeb(CUC_START, &p->scb->cmd_cuc);
 791         ni_attn586();
 792         wait_for_scb_cmd(dev);
 793 #else
 794         writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
 795         writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
 796 #endif
 797
 798         /*
 799          * ack. interrupts
 800          */
 801         writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 802         ni_attn586();
 803         udelay(16);
 804
 805         ni_enaint();
 806
 807         return 0;
 808 }
 809
 810 /******************************************************
 811  * This is a helper routine for ni52_rnr_int() and init586().
 812  * It sets up the Receive Frame Area (RFA).
 813  */
 814
 815 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
 816 {
 817         struct rfd_struct __iomem *rfd = ptr;
 818         struct rbd_struct __iomem *rbd;
 819         int i;
 820         struct priv *p = (struct priv *) dev->priv;
 821
 822         memset_io(rfd, 0,
 823                 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
 824         p->rfd_first = rfd;
 825
 826         for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
 827                 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
 828                         &rfd[i].next);
 829                 writew(0xffff, &rfd[i].rbd_offset);
 830         }
 831         /* RU suspend */
 832         writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
 833
 834         ptr = rfd + (p->num_recv_buffs + rfdadd);
 835
 836         rbd = ptr;
 837         ptr = rbd + p->num_recv_buffs;
 838
 839          /* clr descriptors */
 840         memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
 841
 842         for (i = 0; i < p->num_recv_buffs; i++) {
 843                 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
 844                 writew(RECV_BUFF_SIZE, &rbd[i].size);
 845                 writel(make24(ptr), &rbd[i].buffer);
 846                 ptr = ptr + RECV_BUFF_SIZE;
 847         }
 848         p->rfd_top      = p->rfd_first;
 849         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
 850
 851         writew(make16(p->rfd_first), &p->scb->rfa_offset);
 852         writew(make16(rbd), &p->rfd_first->rbd_offset);
 853
 854         return ptr;
 855 }
 856
 857
 858 /**************************************************
 859  * Interrupt Handler ...
 860  */
 861
 862 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
 863 {
 864         struct net_device *dev = dev_id;
 865         unsigned int stat;
 866         int cnt = 0;
 867         struct priv *p;
 868
 869         p = (struct priv *) dev->priv;
 870
 871         if (debuglevel > 1)
 872                 printk("I");
 873
 874         spin_lock(&p->spinlock);
 875
 876         wait_for_scb_cmd(dev); /* wait for last command */
 877
 878         while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
 879                 writeb(stat, &p->scb->cmd_cuc);
 880                 ni_attn586();
 881
 882                 if (stat & STAT_FR)      /* received a frame */
 883                         ni52_rcv_int(dev);
 884
 885                 if (stat & STAT_RNR) { /* RU went 'not ready' */
 886                         printk("(R)");
 887                         if (readb(&p->scb->rus) & RU_SUSPEND) {
 888                                 /* special case: RU_SUSPEND */
 889                                 wait_for_scb_cmd(dev);
 890                                 p->scb->cmd_ruc = RUC_RESUME;
 891                                 ni_attn586();
 892                                 wait_for_scb_cmd_ruc(dev);
 893                         } else {
 894                                 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
 895                                         dev->name, stat, readb(&p->scb->rus));
 896                                 ni52_rnr_int(dev);
 897                         }
 898                 }
 899
 900                 /* Command with I-bit set complete */
 901                 if (stat & STAT_CX)
 902                          ni52_xmt_int(dev);
 903
 904 #ifndef NO_NOPCOMMANDS
 905                 if (stat & STAT_CNA) {  /* CU went 'not ready' */
 906                         if (netif_running(dev))
 907                                 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
 908                                         dev->name, stat, readb(&p->scb->cus));
 909                 }
 910 #endif
 911
 912                 if (debuglevel > 1)
 913                         printk("%d", cnt++);
 914
 915                 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
 916                 wait_for_scb_cmd(dev);
 917                 if (p->scb->cmd_cuc) {   /* timed out? */
 918                         printk(KERN_ERR "%s: Acknowledge timed out.\n",
 919                                 dev->name);
 920                         ni_disint();
 921                         break;
 922                 }
 923         }
 924         spin_unlock(&p->spinlock);
 925
 926         if (debuglevel > 1)
 927                 printk("i");
 928         return IRQ_HANDLED;
 929 }
 930
 931 /*******************************************************
 932  * receive-interrupt
 933  */
 934
 935 static void ni52_rcv_int(struct net_device *dev)
 936 {
 937         int status, cnt = 0;
 938         unsigned short totlen;
 939         struct sk_buff *skb;
 940         struct rbd_struct __iomem *rbd;
 941         struct priv *p = (struct priv *)dev->priv;
 942
 943         if (debuglevel > 0)
 944                 printk("R");
 945
 946         for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
 947                 rbd = (struct rbd_struct __iomem *) make32(p->rfd_top->rbd_offset);
 948                 if (status & RFD_OK) { /* frame received without error? */
 949                         totlen = readw(&rbd->status);
 950                         if (totlen & RBD_LAST) {
 951                                 /* the first and the last buffer? */
 952                                 totlen &= RBD_MASK; /* length of this frame */
 953                                 writew(0x00, &rbd->status);
 954                                 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
 955                                 if (skb != NULL) {
 956                                         skb_reserve(skb, 2);
 957                                         skb_put(skb, totlen);
 958                                         skb_copy_to_linear_data(skb, p->base + (unsigned long) rbd->buffer, totlen);
 959                                         skb->protocol = eth_type_trans(skb, dev);
 960                                         netif_rx(skb);
 961                                         dev->last_rx = jiffies;
 962                                         p->stats.rx_packets++;
 963                                         p->stats.rx_bytes += totlen;
 964                                 } else
 965                                         p->stats.rx_dropped++;
 966                         } else {
 967                                 int rstat;
 968                                  /* free all RBD's until RBD_LAST is set */
 969                                 totlen = 0;
 970                                 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
 971                                         totlen += rstat & RBD_MASK;
 972                                         if (!rstat) {
 973                                                 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
 974                                                 break;
 975                                         }
 976                                         writew(0, &rbd->status);
 977                                         rbd = (struct rbd_struct __iomem *) make32(readl(&rbd->next));
 978                                 }
 979                                 totlen += rstat & RBD_MASK;
 980                                 writew(0, &rbd->status);
 981                                 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
 982                                         dev->name, totlen);
 983                                 p->stats.rx_dropped++;
 984                          }
 985                 } else {/* frame !(ok), only with 'save-bad-frames' */
 986                         printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
 987                                 dev->name, status);
 988                         p->stats.rx_errors++;
 989                 }
 990                 writeb(0, &p->rfd_top->stat_high);
 991                 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
 992                 writew(0xffff, &p->rfd_top->rbd_offset);
 993                 writeb(0, &p->rfd_last->last);  /* delete RFD_SUSP      */
 994                 p->rfd_last = p->rfd_top;
 995                 p->rfd_top = (struct rfd_struct __iomem *) make32(p->rfd_top->next); /* step to next RFD */
 996                 writew(make16(p->rfd_top), &p->scb->rfa_offset);
 997
 998                 if (debuglevel > 0)
 999                         printk("%d", cnt++);
1000         }
1001
1002         if (automatic_resume) {
1003                 wait_for_scb_cmd(dev);
1004                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1005                 ni_attn586();
1006                 wait_for_scb_cmd_ruc(dev);
1007         }
1008
1009 #ifdef WAIT_4_BUSY
1010         {
1011                 int i;
1012                 for (i = 0; i < 1024; i++) {
1013                         if (p->rfd_top->status)
1014                                 break;
1015                         udelay(16);
1016                         if (i == 1023)
1017                                 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1018                 }
1019         }
1020 #endif
1021         if (debuglevel > 0)
1022                 printk("r");
1023 }
1024
1025 /**********************************************************
1026  * handle 'Receiver went not ready'.
1027  */
1028
1029 static void ni52_rnr_int(struct net_device *dev)
1030 {
1031         struct priv *p = (struct priv *) dev->priv;
1032
1033         p->stats.rx_errors++;
1034
1035         wait_for_scb_cmd(dev);          /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1036         writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1037         ni_attn586();
1038         wait_for_scb_cmd_ruc(dev);              /* wait for accept cmd. */
1039
1040         alloc_rfa(dev, p->rfd_first);
1041         /* maybe add a check here, before restarting the RU */
1042         startrecv586(dev); /* restart RU */
1043
1044         printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->rus);
1045
1046 }
1047
1048 /**********************************************************
1049  * handle xmit - interrupt
1050  */
1051
1052 static void ni52_xmt_int(struct net_device *dev)
1053 {
1054         int status;
1055         struct priv *p = (struct priv *) dev->priv;
1056
1057         if (debuglevel > 0)
1058                 printk("X");
1059
1060         status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1061         if (!(status & STAT_COMPL))
1062                 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1063
1064         if (status & STAT_OK) {
1065                 p->stats.tx_packets++;
1066                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1067         } else {
1068                 p->stats.tx_errors++;
1069                 if (status & TCMD_LATECOLL) {
1070                         printk(KERN_ERR "%s: late collision detected.\n",
1071                                 dev->name);
1072                         p->stats.collisions++;
1073                 } else if (status & TCMD_NOCARRIER) {
1074                         p->stats.tx_carrier_errors++;
1075                         printk(KERN_ERR "%s: no carrier detected.\n",
1076                                 dev->name);
1077                 } else if (status & TCMD_LOSTCTS)
1078                         printk(KERN_ERR "%s: loss of CTS detected.\n",
1079                                 dev->name);
1080                 else if (status & TCMD_UNDERRUN) {
1081                         p->stats.tx_fifo_errors++;
1082                         printk(KERN_ERR "%s: DMA underrun detected.\n",
1083                                 dev->name);
1084                 } else if (status & TCMD_MAXCOLL) {
1085                         printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1086                                 dev->name);
1087                         p->stats.collisions += 16;
1088                 }
1089         }
1090 #if (NUM_XMIT_BUFFS > 1)
1091         if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1092                 p->xmit_last = 0;
1093 #endif
1094         netif_wake_queue(dev);
1095 }
1096
1097 /***********************************************************
1098  * (re)start the receiver
1099  */
1100
1101 static void startrecv586(struct net_device *dev)
1102 {
1103         struct priv *p = (struct priv *) dev->priv;
1104
1105         wait_for_scb_cmd(dev);
1106         wait_for_scb_cmd_ruc(dev);
1107         writew(make16(p->rfd_first), &p->scb->rfa_offset);
1108         writeb(RUC_START, &p->scb->cmd_ruc);
1109         ni_attn586();           /* start cmd. */
1110         wait_for_scb_cmd_ruc(dev);
1111         /* wait for accept cmd. (no timeout!!) */
1112 }
1113
1114 static void ni52_timeout(struct net_device *dev)
1115 {
1116         struct priv *p = (struct priv *) dev->priv;
1117 #ifndef NO_NOPCOMMANDS
1118         if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1119                 netif_wake_queue(dev);
1120 #ifdef DEBUG
1121                 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1122                         dev->name);
1123                 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1124                         dev->name, (int)p->xmit_cmds[0]->cmd_status,
1125                         readw(&p->nop_cmds[0]->cmd_status),
1126                         readw(&p->nop_cmds[1]->cmd_status),
1127                         p->nop_point);
1128 #endif
1129                 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1130                 ni_attn586();
1131                 wait_for_scb_cmd(dev);
1132                 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1133                 writeb(CUC_START, &p->scb->cmd_cuc);
1134                 ni_attn586();
1135                 wait_for_scb_cmd(dev);
1136                 dev->trans_start = jiffies;
1137                 return 0;
1138         }
1139 #endif
1140         {
1141 #ifdef DEBUG
1142                 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1143                                 dev->name, readb(&p->scb->cus));
1144                 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1145                                 dev->name,
1146                                 readw(&p->xmit_cmds[0]->cmd_status),
1147                                 readw(&p->xmit_cmds[1]->cmd_status));
1148                 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1149                                 dev->name);
1150 #endif
1151                 ni52_close(dev);
1152                 ni52_open(dev);
1153         }
1154         dev->trans_start = jiffies;
1155 }
1156
1157 /******************************************************
1158  * send frame
1159  */
1160
1161 static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
1162 {
1163         int len, i;
1164 #ifndef NO_NOPCOMMANDS
1165         int next_nop;
1166 #endif
1167         struct priv *p = (struct priv *) dev->priv;
1168
1169         if (skb->len > XMIT_BUFF_SIZE) {
1170                 printk(KERN_ERR "%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n", dev->name, XMIT_BUFF_SIZE, skb->len);
1171                 return 0;
1172         }
1173
1174         netif_stop_queue(dev);
1175
1176         skb_copy_from_linear_data(skb, (char *)p->xmit_cbuffs[p->xmit_count],
1177                                                         skb->len);
1178         len = skb->len;
1179         if (len < ETH_ZLEN) {
1180                 len = ETH_ZLEN;
1181                 memset((char *)p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1182                                                         len - skb->len);
1183         }
1184
1185 #if (NUM_XMIT_BUFFS == 1)
1186 #       ifdef NO_NOPCOMMANDS
1187
1188 #ifdef DEBUG
1189         if (p->scb->cus & CU_ACTIVE) {
1190                 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1191                 printk(KERN_ERR "%s: stat: %04x %04x\n",
1192                                 dev->name, readb(&p->scb->cus),
1193                                 readw(&p->xmit_cmds[0]->cmd_status));
1194         }
1195 #endif
1196         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);;
1197         for (i = 0; i < 16; i++) {
1198                 writew(0, &p->xmit_cmds[0]->cmd_status);
1199                 wait_for_scb_cmd(dev);
1200                 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1201                         writeb(CUC_RESUME, &p->scb->cmd_cuc);
1202                 else {
1203                         writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1204                         writeb(CUC_START, &p->scb->cmd_cuc);
1205                 }
1206                 ni_attn586();
1207                 dev->trans_start = jiffies;
1208                 if (!i)
1209                         dev_kfree_skb(skb);
1210                 wait_for_scb_cmd(dev);
1211                 /* test it, because CU sometimes doesn't start immediately */
1212                 if (readb(&p->scb->cus) & CU_ACTIVE)
1213                         break;
1214                 if (readw(&p->xmit_cmds[0]->cmd_status))
1215                         break;
1216                 if (i == 15)
1217                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1218         }
1219 #       else
1220         next_nop = (p->nop_point + 1) & 0x1;
1221         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1222         writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1223         writew(make16(p->nop_cmds[next_nop]),
1224                                 &p->nop_cmds[next_nop]->cmd_link);
1225         writew(0, &p->xmit_cmds[0]->cmd_status);
1226         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1227
1228         writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1229         dev->trans_start = jiffies;
1230         p->nop_point = next_nop;
1231         dev_kfree_skb(skb);
1232 #       endif
1233 #else
1234         writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1235         next_nop = p->xmit_count + 1
1236         if (next_nop == NUM_XMIT_BUFFS)
1237                 next_nop = 0;
1238         writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1239         /* linkpointer of xmit-command already points to next nop cmd */
1240         writew(make16(p->nop_cmds[next_nop]),
1241                                 &p->nop_cmds[next_nop]->cmd_link);
1242         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1243         writew(make16(p->xmit_cmds[p->xmit_count]),
1244                                 &p->nop_cmds[p->xmit_count]->cmd_link);
1245         dev->trans_start = jiffies;
1246         p->xmit_count = next_nop;
1247         {
1248                 unsigned long flags;
1249                 spin_lock_irqsave(&p->spinlock);
1250                 if (p->xmit_count != p->xmit_last)
1251                         netif_wake_queue(dev);
1252                 spin_unlock_irqrestore(&p->spinlock);
1253         }
1254         dev_kfree_skb(skb);
1255 #endif
1256         return 0;
1257 }
1258
1259 /*******************************************
1260  * Someone wanna have the statistics
1261  */
1262
1263 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1264 {
1265         struct priv *p = (struct priv *) dev->priv;
1266         unsigned short crc, aln, rsc, ovrn;
1267
1268         /* Get error-statistics from the ni82586 */
1269         crc = readw(&p->scb->crc_errs);
1270         writew(0, &p->scb->crc_errs);
1271         aln = readw(&p->scb->aln_errs);
1272         writew(0, &p->scb->aln_errs);
1273         rsc = readw(&p->scb->rsc_errs);
1274         writew(0, &p->scb->rsc_errs);
1275         ovrn = readw(&p->scb->ovrn_errs);
1276         writew(0, &p->scb->ovrn_errs);
1277
1278         p->stats.rx_crc_errors += crc;
1279         p->stats.rx_fifo_errors += ovrn;
1280         p->stats.rx_frame_errors += aln;
1281         p->stats.rx_dropped += rsc;
1282
1283         return &p->stats;
1284 }
1285
1286 /********************************************************
1287  * Set MC list ..
1288  */
1289
1290 static void set_multicast_list(struct net_device *dev)
1291 {
1292         netif_stop_queue(dev);
1293         ni_disint();
1294         alloc586(dev);
1295         init586(dev);
1296         startrecv586(dev);
1297         ni_enaint();
1298         netif_wake_queue(dev);
1299 }
1300
1301 #ifdef MODULE
1302 static struct net_device *dev_ni52;
1303
1304 module_param(io, int, 0);
1305 module_param(irq, int, 0);
1306 module_param(memstart, long, 0);
1307 module_param(memend, long, 0);
1308 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1309 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1310 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1311 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1312
1313 int __init init_module(void)
1314 {
1315         if (io <= 0x0 || !memend || !memstart || irq < 2) {
1316                 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1317                 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1318                 return -ENODEV;
1319         }
1320         dev_ni52 = ni52_probe(-1);
1321         if (IS_ERR(dev_ni52))
1322                 return PTR_ERR(dev_ni52);
1323         return 0;
1324 }
1325
1326 void __exit cleanup_module(void)
1327 {
1328         unregister_netdev(dev_ni52);
1329         release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1330         free_netdev(dev_ni52);
1331 }
1332 #endif /* MODULE */
1333
1334 MODULE_LICENSE("GPL");
1335
1336 /*
1337  * END: linux/drivers/net/ni52.c
1338  */