git.oblomov.eu Git - linux-2.6/blob - 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 = ioremap(dev->mem_start, size);
 324         if (!p->mapped)
 325                 return 0;
 326
 327         p->base = p->mapped + size - 0x01000000;
 328         p->memtop = p->mapped + size;
 329         p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
 330         p->scb  = (struct scb_struct __iomem *) p->mapped;
 331         p->iscp = (struct iscp_struct __iomem *)p->scp - 1;
 332         memset_io(p->scp, 0, sizeof(struct scp_struct));
 333         for (i = 0; i < sizeof(struct scp_struct); i++)
 334                 /* memory was writeable? */
 335                 if (readb((char __iomem *)p->scp + i))
 336                         goto Enodev;
 337         writeb(SYSBUSVAL, &p->scp->sysbus);     /* 1 = 8Bit-Bus, 0 = 16 Bit */
 338         if (readb(&p->scp->sysbus) != SYSBUSVAL)
 339                 goto Enodev;
 340
 341         if (!check_iscp(dev, p->mapped))
 342                 goto Enodev;
 343         if (!check_iscp(dev, p->iscp))
 344                 goto Enodev;
 345         return 1;
 346 Enodev:
 347         iounmap(p->mapped);
 348         return 0;
 349 }
 350
 351 /******************************************************************
 352  * set iscp at the right place, called by ni52_probe1 and open586.
 353  */
 354 static void alloc586(struct net_device *dev)
 355 {
 356         struct priv *p =        (struct priv *) dev->priv;
 357
 358         ni_reset586();
 359         mdelay(32);
 360
 361         memset_io(p->iscp, 0, sizeof(struct iscp_struct));
 362         memset_io(p->scp , 0, sizeof(struct scp_struct));
 363
 364         writel(make24(p->iscp), &p->scp->iscp);
 365         writeb(SYSBUSVAL, &p->scp->sysbus);
 366         writew(make16(p->scb), &p->iscp->scb_offset);
 367
 368         writeb(1, &p->iscp->busy);
 369         ni_reset586();
 370         ni_attn586();
 371
 372         mdelay(32);
 373
 374         if (readb(&p->iscp->busy))
 375                 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
 376
 377         p->reset = 0;
 378
 379         memset_io(p->scb, 0, sizeof(struct scb_struct));
 380 }
 381
 382 /* set: io,irq,memstart,memend or set it when calling insmod */
 383 static int irq = 9;
 384 static int io = 0x300;
 385 static long memstart;   /* e.g 0xd0000 */
 386 static long memend;     /* e.g 0xd4000 */
 387
 388 /**********************************************
 389  * probe the ni5210-card
 390  */
 391 struct net_device * __init ni52_probe(int unit)
 392 {
 393         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
 394         static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
 395         struct priv *p;
 396         int *port;
 397         int err = 0;
 398
 399         if (!dev)
 400                 return ERR_PTR(-ENOMEM);
 401
 402         p = dev->priv;
 403
 404         if (unit >= 0) {
 405                 sprintf(dev->name, "eth%d", unit);
 406                 netdev_boot_setup_check(dev);
 407                 io = dev->base_addr;
 408                 irq = dev->irq;
 409                 memstart = dev->mem_start;
 410                 memend = dev->mem_end;
 411         }
 412
 413         if (io > 0x1ff) {       /* Check a single specified location. */
 414                 err = ni52_probe1(dev, io);
 415         } else if (io > 0) {            /* Don't probe at all. */
 416                 err = -ENXIO;
 417         } else {
 418                 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
 419                         ;
 420                 if (*port)
 421                         goto got_it;
 422 #ifdef FULL_IO_PROBE
 423                 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
 424                         ;
 425                 if (io < 0x400)
 426                         goto got_it;
 427 #endif
 428                 err = -ENODEV;
 429         }
 430         if (err)
 431                 goto out;
 432 got_it:
 433         err = register_netdev(dev);
 434         if (err)
 435                 goto out1;
 436         return dev;
 437 out1:
 438         iounmap(p->mapped);
 439         release_region(dev->base_addr, NI52_TOTAL_SIZE);
 440 out:
 441         free_netdev(dev);
 442         return ERR_PTR(err);
 443 }
 444
 445 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
 446 {
 447         int i, size, retval;
 448         struct priv *priv = dev->priv;
 449
 450         dev->base_addr = ioaddr;
 451         dev->irq = irq;
 452         dev->mem_start = memstart;
 453         dev->mem_end = memend;
 454
 455         spin_lock_init(&priv->spinlock);
 456
 457         if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
 458                 return -EBUSY;
 459
 460         if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
 461             !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
 462                 retval = -ENODEV;
 463                 goto out;
 464         }
 465
 466         for (i = 0; i < ETH_ALEN; i++)
 467                 dev->dev_addr[i] = inb(dev->base_addr+i);
 468
 469         if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
 470                  || dev->dev_addr[2] != NI52_ADDR2) {
 471                 retval = -ENODEV;
 472                 goto out;
 473         }
 474
 475         printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
 476                                 dev->name, dev->base_addr);
 477
 478         /*
 479          * check (or search) IO-Memory, 8K and 16K
 480          */
 481 #ifdef MODULE
 482         size = dev->mem_end - dev->mem_start;
 483         if (size != 0x2000 && size != 0x4000) {
 484                 printk("\n");
 485                 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
 486                 retval = -ENODEV;
 487                 goto out;
 488         }
 489         if (!check586(dev, size)) {
 490                 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
 491                 retval = -ENODEV;
 492                 goto out;
 493         }
 494 #else
 495         if (dev->mem_start != 0) {
 496                 /* no auto-mem-probe */
 497                 size = 0x4000; /* check for 16K mem */
 498                 if (!check586(dev, size)) {
 499                         size = 0x2000; /* check for 8K mem */
 500                         if (!check586(dev, size)) {
 501                                 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
 502                                 retval = -ENODEV;
 503                                 goto out;
 504                         }
 505                 }
 506         } else {
 507                 static const unsigned long memaddrs[] = {
 508                         0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
 509                         0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
 510                 };
 511                 for (i = 0;; i++) {
 512                         if (!memaddrs[i]) {
 513                                 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
 514                                 retval = -ENODEV;
 515                                 goto out;
 516                         }
 517                         dev->mem_start = memaddrs[i];
 518                         size = 0x2000; /* check for 8K mem */
 519                         if (check586(dev, size))
 520                                 /* 8K-check */
 521                                 break;
 522                         size = 0x4000; /* check for 16K mem */
 523                         if (check586(dev, size))
 524                                 /* 16K-check */
 525                                 break;
 526                 }
 527         }
 528         /* set mem_end showed by 'ifconfig' */
 529         dev->mem_end = dev->mem_start + size;
 530 #endif
 531
 532         alloc586(dev);
 533
 534         /* set number of receive-buffs according to memsize */
 535         if (size == 0x2000)
 536                 priv->num_recv_buffs = NUM_RECV_BUFFS_8;
 537         else
 538                 priv->num_recv_buffs = NUM_RECV_BUFFS_16;
 539
 540         printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
 541                                 dev->mem_start, size);
 542
 543         if (dev->irq < 2) {
 544                 unsigned long irq_mask;
 545
 546                 irq_mask = probe_irq_on();
 547                 ni_reset586();
 548                 ni_attn586();
 549
 550                 mdelay(20);
 551                 dev->irq = probe_irq_off(irq_mask);
 552                 if (!dev->irq) {
 553                         printk("?autoirq, Failed to detect IRQ line!\n");
 554                         retval = -EAGAIN;
 555                         iounmap(priv->mapped);
 556                         goto out;
 557                 }
 558                 printk("IRQ %d (autodetected).\n", dev->irq);
 559         } else {
 560                 if (dev->irq == 2)
 561                         dev->irq = 9;
 562                 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
 563         }
 564
 565         dev->open               = ni52_open;
 566         dev->stop               = ni52_close;
 567         dev->get_stats          = ni52_get_stats;
 568         dev->tx_timeout         = ni52_timeout;
 569         dev->watchdog_timeo     = HZ/20;
 570         dev->hard_start_xmit    = ni52_send_packet;
 571         dev->set_multicast_list = set_multicast_list;
 572
 573         dev->if_port            = 0;
 574
 575         return 0;
 576 out:
 577         release_region(ioaddr, NI52_TOTAL_SIZE);
 578         return retval;
 579 }
 580
 581 /**********************************************
 582  * init the chip (ni52-interrupt should be disabled?!)
 583  * needs a correct 'allocated' memory
 584  */
 585
 586 static int init586(struct net_device *dev)
 587 {
 588         void __iomem *ptr;
 589         int i, result = 0;
 590         struct priv *p = (struct priv *)dev->priv;
 591         struct configure_cmd_struct __iomem *cfg_cmd;
 592         struct iasetup_cmd_struct __iomem *ias_cmd;
 593         struct tdr_cmd_struct __iomem *tdr_cmd;
 594         struct mcsetup_cmd_struct __iomem *mc_cmd;
 595         struct dev_mc_list *dmi = dev->mc_list;
 596         int num_addrs = dev->mc_count;
 597
 598         ptr = p->scb + 1;
 599
 600         cfg_cmd = ptr; /* configure-command */
 601         writew(0, &cfg_cmd->cmd_status);
 602         writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
 603         writew(0xFFFF, &cfg_cmd->cmd_link);
 604
 605         /* number of cfg bytes */
 606         writeb(0x0a, &cfg_cmd->byte_cnt);
 607         /* fifo-limit (8=tx:32/rx:64) */
 608         writeb(fifo, &cfg_cmd->fifo);
 609         /* hold or discard bad recv frames (bit 7) */
 610         writeb(0x40, &cfg_cmd->sav_bf);
 611         /* addr_len |!src_insert |pre-len |loopback */
 612         writeb(0x2e, &cfg_cmd->adr_len);
 613         writeb(0x00, &cfg_cmd->priority);
 614         writeb(0x60, &cfg_cmd->ifs);;
 615         writeb(0x00, &cfg_cmd->time_low);
 616         writeb(0xf2, &cfg_cmd->time_high);
 617         writeb(0x00, &cfg_cmd->promisc);;
 618         if (dev->flags & IFF_ALLMULTI) {
 619                 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
 620                 if (num_addrs > len) {
 621                         printk(KERN_ERR "%s: switching to promisc. mode\n",
 622                                 dev->name);
 623                         dev->flags |= IFF_PROMISC;
 624                 }
 625         }
 626         if (dev->flags & IFF_PROMISC)
 627                 writeb(0x01, &cfg_cmd->promisc);
 628         writeb(0x00, &cfg_cmd->carr_coll);
 629         writew(make16(cfg_cmd), &p->scb->cbl_offset);
 630         writew(0, &p->scb->cmd_ruc);
 631
 632         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 633         ni_attn586();
 634
 635         wait_for_stat_compl(cfg_cmd);
 636
 637         if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 638                                                         (STAT_COMPL|STAT_OK)) {
 639                 printk(KERN_ERR "%s: configure command failed: %x\n",
 640                                 dev->name, readw(&cfg_cmd->cmd_status));
 641                 return 1;
 642         }
 643
 644         /*
 645          * individual address setup
 646          */
 647
 648         ias_cmd = ptr;
 649
 650         writew(0, &ias_cmd->cmd_status);
 651         writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
 652         writew(0xffff, &ias_cmd->cmd_link);
 653
 654         memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
 655
 656         writew(make16(ias_cmd), &p->scb->cbl_offset);
 657
 658         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 659         ni_attn586();
 660
 661         wait_for_stat_compl(ias_cmd);
 662
 663         if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 664                                                         (STAT_OK|STAT_COMPL)) {
 665                 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
 666                 return 1;
 667         }
 668
 669         /*
 670          * TDR, wire check .. e.g. no resistor e.t.c
 671          */
 672
 673         tdr_cmd = ptr;
 674
 675         writew(0, &tdr_cmd->cmd_status);
 676         writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
 677         writew(0xffff, &tdr_cmd->cmd_link);
 678         writew(0, &tdr_cmd->status);
 679
 680         writew(make16(tdr_cmd), &p->scb->cbl_offset);
 681         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 682         ni_attn586();
 683
 684         wait_for_stat_compl(tdr_cmd);
 685
 686         if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
 687                 printk(KERN_ERR "%s: Problems while running the TDR.\n",
 688                                 dev->name);
 689         else {
 690                 udelay(16);
 691                 result = readw(&tdr_cmd->status);
 692                 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 693                 ni_attn586(); /* ack the interrupts */
 694
 695                 if (result & TDR_LNK_OK)
 696                         ;
 697                 else if (result & TDR_XCVR_PRB)
 698                         printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
 699                                 dev->name);
 700                 else if (result & TDR_ET_OPN)
 701                         printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
 702                                 dev->name, result & TDR_TIMEMASK);
 703                 else if (result & TDR_ET_SRT) {
 704                         /* time == 0 -> strange :-) */
 705                         if (result & TDR_TIMEMASK)
 706                                 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
 707                                         dev->name, result & TDR_TIMEMASK);
 708                 } else
 709                         printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
 710                                                 dev->name, result);
 711         }
 712
 713         /*
 714          * Multicast setup
 715          */
 716         if (num_addrs && !(dev->flags & IFF_PROMISC)) {
 717                 mc_cmd = ptr;
 718                 writew(0, &mc_cmd->cmd_status);
 719                 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
 720                 writew(0xffff, &mc_cmd->cmd_link);
 721                 writew(num_addrs * 6, &mc_cmd->mc_cnt);
 722
 723                 for (i = 0; i < num_addrs; i++, dmi = dmi->next)
 724                         memcpy_toio(mc_cmd->mc_list[i],
 725                                                         dmi->dmi_addr, 6);
 726
 727                 writew(make16(mc_cmd), &p->scb->cbl_offset);
 728                 writeb(CUC_START, &p->scb->cmd_cuc);
 729                 ni_attn586();
 730
 731                 wait_for_stat_compl(mc_cmd);
 732
 733                 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
 734                                                  != (STAT_COMPL|STAT_OK))
 735                         printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
 736         }
 737
 738         /*
 739          * alloc nop/xmit-cmds
 740          */
 741 #if (NUM_XMIT_BUFFS == 1)
 742         for (i = 0; i < 2; i++) {
 743                 p->nop_cmds[i] = ptr;
 744                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 745                 writew(0, &p->nop_cmds[i]->cmd_status);
 746                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 747                 ptr = ptr + sizeof(struct nop_cmd_struct);
 748         }
 749 #else
 750         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 751                 p->nop_cmds[i] = ptr;
 752                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 753                 writew(0, &p->nop_cmds[i]->cmd_status);
 754                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 755                 ptr = ptr + sizeof(struct nop_cmd_struct);
 756         }
 757 #endif
 758
 759         ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
 760
 761         /*
 762          * alloc xmit-buffs / init xmit_cmds
 763          */
 764         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 765                 /* Transmit cmd/buff 0 */
 766                 p->xmit_cmds[i] = ptr;
 767                 ptr = ptr + sizeof(struct transmit_cmd_struct);
 768                 p->xmit_cbuffs[i] = ptr; /* char-buffs */
 769                 ptr = ptr + XMIT_BUFF_SIZE;
 770                 p->xmit_buffs[i] = ptr; /* TBD */
 771                 ptr = ptr + sizeof(struct tbd_struct);
 772                 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
 773                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
 774                                 dev->name);
 775                         return 1;
 776                 }
 777                 memset_io(p->xmit_cmds[i], 0,
 778                                         sizeof(struct transmit_cmd_struct));
 779                 memset_io(p->xmit_buffs[i], 0,
 780                                         sizeof(struct tbd_struct));
 781                 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
 782                                         &p->xmit_cmds[i]->cmd_link);
 783                 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
 784                 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
 785                 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
 786                 writew(0xffff, &p->xmit_buffs[i]->next);
 787                 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
 788         }
 789
 790         p->xmit_count = 0;
 791         p->xmit_last    = 0;
 792 #ifndef NO_NOPCOMMANDS
 793         p->nop_point    = 0;
 794 #endif
 795
 796          /*
 797                 * 'start transmitter'
 798                 */
 799 #ifndef NO_NOPCOMMANDS
 800         writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
 801         writeb(CUC_START, &p->scb->cmd_cuc);
 802         ni_attn586();
 803         wait_for_scb_cmd(dev);
 804 #else
 805         writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
 806         writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
 807 #endif
 808
 809         /*
 810          * ack. interrupts
 811          */
 812         writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 813         ni_attn586();
 814         udelay(16);
 815
 816         ni_enaint();
 817
 818         return 0;
 819 }
 820
 821 /******************************************************
 822  * This is a helper routine for ni52_rnr_int() and init586().
 823  * It sets up the Receive Frame Area (RFA).
 824  */
 825
 826 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
 827 {
 828         struct rfd_struct __iomem *rfd = ptr;
 829         struct rbd_struct __iomem *rbd;
 830         int i;
 831         struct priv *p = (struct priv *) dev->priv;
 832
 833         memset_io(rfd, 0,
 834                 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
 835         p->rfd_first = rfd;
 836
 837         for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
 838                 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
 839                         &rfd[i].next);
 840                 writew(0xffff, &rfd[i].rbd_offset);
 841         }
 842         /* RU suspend */
 843         writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
 844
 845         ptr = rfd + (p->num_recv_buffs + rfdadd);
 846
 847         rbd = ptr;
 848         ptr = rbd + p->num_recv_buffs;
 849
 850          /* clr descriptors */
 851         memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
 852
 853         for (i = 0; i < p->num_recv_buffs; i++) {
 854                 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
 855                 writew(RECV_BUFF_SIZE, &rbd[i].size);
 856                 writel(make24(ptr), &rbd[i].buffer);
 857                 ptr = ptr + RECV_BUFF_SIZE;
 858         }
 859         p->rfd_top      = p->rfd_first;
 860         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
 861
 862         writew(make16(p->rfd_first), &p->scb->rfa_offset);
 863         writew(make16(rbd), &p->rfd_first->rbd_offset);
 864
 865         return ptr;
 866 }
 867
 868
 869 /**************************************************
 870  * Interrupt Handler ...
 871  */
 872
 873 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
 874 {
 875         struct net_device *dev = dev_id;
 876         unsigned int stat;
 877         int cnt = 0;
 878         struct priv *p;
 879
 880         p = (struct priv *) dev->priv;
 881
 882         if (debuglevel > 1)
 883                 printk("I");
 884
 885         spin_lock(&p->spinlock);
 886
 887         wait_for_scb_cmd(dev); /* wait for last command */
 888
 889         while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
 890                 writeb(stat, &p->scb->cmd_cuc);
 891                 ni_attn586();
 892
 893                 if (stat & STAT_FR)      /* received a frame */
 894                         ni52_rcv_int(dev);
 895
 896                 if (stat & STAT_RNR) { /* RU went 'not ready' */
 897                         printk("(R)");
 898                         if (readb(&p->scb->rus) & RU_SUSPEND) {
 899                                 /* special case: RU_SUSPEND */
 900                                 wait_for_scb_cmd(dev);
 901                                 p->scb->cmd_ruc = RUC_RESUME;
 902                                 ni_attn586();
 903                                 wait_for_scb_cmd_ruc(dev);
 904                         } else {
 905                                 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
 906                                         dev->name, stat, readb(&p->scb->rus));
 907                                 ni52_rnr_int(dev);
 908                         }
 909                 }
 910
 911                 /* Command with I-bit set complete */
 912                 if (stat & STAT_CX)
 913                          ni52_xmt_int(dev);
 914
 915 #ifndef NO_NOPCOMMANDS
 916                 if (stat & STAT_CNA) {  /* CU went 'not ready' */
 917                         if (netif_running(dev))
 918                                 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
 919                                         dev->name, stat, readb(&p->scb->cus));
 920                 }
 921 #endif
 922
 923                 if (debuglevel > 1)
 924                         printk("%d", cnt++);
 925
 926                 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
 927                 wait_for_scb_cmd(dev);
 928                 if (p->scb->cmd_cuc) {   /* timed out? */
 929                         printk(KERN_ERR "%s: Acknowledge timed out.\n",
 930                                 dev->name);
 931                         ni_disint();
 932                         break;
 933                 }
 934         }
 935         spin_unlock(&p->spinlock);
 936
 937         if (debuglevel > 1)
 938                 printk("i");
 939         return IRQ_HANDLED;
 940 }
 941
 942 /*******************************************************
 943  * receive-interrupt
 944  */
 945
 946 static void ni52_rcv_int(struct net_device *dev)
 947 {
 948         int status, cnt = 0;
 949         unsigned short totlen;
 950         struct sk_buff *skb;
 951         struct rbd_struct __iomem *rbd;
 952         struct priv *p = (struct priv *)dev->priv;
 953
 954         if (debuglevel > 0)
 955                 printk("R");
 956
 957         for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
 958                 rbd = (struct rbd_struct __iomem *) make32(p->rfd_top->rbd_offset);
 959                 if (status & RFD_OK) { /* frame received without error? */
 960                         totlen = readw(&rbd->status);
 961                         if (totlen & RBD_LAST) {
 962                                 /* the first and the last buffer? */
 963                                 totlen &= RBD_MASK; /* length of this frame */
 964                                 writew(0x00, &rbd->status);
 965                                 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
 966                                 if (skb != NULL) {
 967                                         skb_reserve(skb, 2);
 968                                         skb_put(skb, totlen);
 969                                         skb_copy_to_linear_data(skb, p->base + (unsigned long) rbd->buffer, totlen);
 970                                         skb->protocol = eth_type_trans(skb, dev);
 971                                         netif_rx(skb);
 972                                         dev->last_rx = jiffies;
 973                                         p->stats.rx_packets++;
 974                                         p->stats.rx_bytes += totlen;
 975                                 } else
 976                                         p->stats.rx_dropped++;
 977                         } else {
 978                                 int rstat;
 979                                  /* free all RBD's until RBD_LAST is set */
 980                                 totlen = 0;
 981                                 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
 982                                         totlen += rstat & RBD_MASK;
 983                                         if (!rstat) {
 984                                                 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
 985                                                 break;
 986                                         }
 987                                         writew(0, &rbd->status);
 988                                         rbd = (struct rbd_struct __iomem *) make32(readl(&rbd->next));
 989                                 }
 990                                 totlen += rstat & RBD_MASK;
 991                                 writew(0, &rbd->status);
 992                                 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
 993                                         dev->name, totlen);
 994                                 p->stats.rx_dropped++;
 995                          }
 996                 } else {/* frame !(ok), only with 'save-bad-frames' */
 997                         printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
 998                                 dev->name, status);
 999                         p->stats.rx_errors++;
1000                 }
1001                 writeb(0, &p->rfd_top->stat_high);
1002                 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
1003                 writew(0xffff, &p->rfd_top->rbd_offset);
1004                 writeb(0, &p->rfd_last->last);  /* delete RFD_SUSP      */
1005                 p->rfd_last = p->rfd_top;
1006                 p->rfd_top = (struct rfd_struct __iomem *) make32(p->rfd_top->next); /* step to next RFD */
1007                 writew(make16(p->rfd_top), &p->scb->rfa_offset);
1008
1009                 if (debuglevel > 0)
1010                         printk("%d", cnt++);
1011         }
1012
1013         if (automatic_resume) {
1014                 wait_for_scb_cmd(dev);
1015                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1016                 ni_attn586();
1017                 wait_for_scb_cmd_ruc(dev);
1018         }
1019
1020 #ifdef WAIT_4_BUSY
1021         {
1022                 int i;
1023                 for (i = 0; i < 1024; i++) {
1024                         if (p->rfd_top->status)
1025                                 break;
1026                         udelay(16);
1027                         if (i == 1023)
1028                                 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1029                 }
1030         }
1031 #endif
1032         if (debuglevel > 0)
1033                 printk("r");
1034 }
1035
1036 /**********************************************************
1037  * handle 'Receiver went not ready'.
1038  */
1039
1040 static void ni52_rnr_int(struct net_device *dev)
1041 {
1042         struct priv *p = (struct priv *) dev->priv;
1043
1044         p->stats.rx_errors++;
1045
1046         wait_for_scb_cmd(dev);          /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1047         writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1048         ni_attn586();
1049         wait_for_scb_cmd_ruc(dev);              /* wait for accept cmd. */
1050
1051         alloc_rfa(dev, p->rfd_first);
1052         /* maybe add a check here, before restarting the RU */
1053         startrecv586(dev); /* restart RU */
1054
1055         printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->rus);
1056
1057 }
1058
1059 /**********************************************************
1060  * handle xmit - interrupt
1061  */
1062
1063 static void ni52_xmt_int(struct net_device *dev)
1064 {
1065         int status;
1066         struct priv *p = (struct priv *) dev->priv;
1067
1068         if (debuglevel > 0)
1069                 printk("X");
1070
1071         status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1072         if (!(status & STAT_COMPL))
1073                 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1074
1075         if (status & STAT_OK) {
1076                 p->stats.tx_packets++;
1077                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1078         } else {
1079                 p->stats.tx_errors++;
1080                 if (status & TCMD_LATECOLL) {
1081                         printk(KERN_ERR "%s: late collision detected.\n",
1082                                 dev->name);
1083                         p->stats.collisions++;
1084                 } else if (status & TCMD_NOCARRIER) {
1085                         p->stats.tx_carrier_errors++;
1086                         printk(KERN_ERR "%s: no carrier detected.\n",
1087                                 dev->name);
1088                 } else if (status & TCMD_LOSTCTS)
1089                         printk(KERN_ERR "%s: loss of CTS detected.\n",
1090                                 dev->name);
1091                 else if (status & TCMD_UNDERRUN) {
1092                         p->stats.tx_fifo_errors++;
1093                         printk(KERN_ERR "%s: DMA underrun detected.\n",
1094                                 dev->name);
1095                 } else if (status & TCMD_MAXCOLL) {
1096                         printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1097                                 dev->name);
1098                         p->stats.collisions += 16;
1099                 }
1100         }
1101 #if (NUM_XMIT_BUFFS > 1)
1102         if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1103                 p->xmit_last = 0;
1104 #endif
1105         netif_wake_queue(dev);
1106 }
1107
1108 /***********************************************************
1109  * (re)start the receiver
1110  */
1111
1112 static void startrecv586(struct net_device *dev)
1113 {
1114         struct priv *p = (struct priv *) dev->priv;
1115
1116         wait_for_scb_cmd(dev);
1117         wait_for_scb_cmd_ruc(dev);
1118         writew(make16(p->rfd_first), &p->scb->rfa_offset);
1119         writeb(RUC_START, &p->scb->cmd_ruc);
1120         ni_attn586();           /* start cmd. */
1121         wait_for_scb_cmd_ruc(dev);
1122         /* wait for accept cmd. (no timeout!!) */
1123 }
1124
1125 static void ni52_timeout(struct net_device *dev)
1126 {
1127         struct priv *p = (struct priv *) dev->priv;
1128 #ifndef NO_NOPCOMMANDS
1129         if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1130                 netif_wake_queue(dev);
1131 #ifdef DEBUG
1132                 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1133                         dev->name);
1134                 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1135                         dev->name, (int)p->xmit_cmds[0]->cmd_status,
1136                         readw(&p->nop_cmds[0]->cmd_status),
1137                         readw(&p->nop_cmds[1]->cmd_status),
1138                         p->nop_point);
1139 #endif
1140                 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1141                 ni_attn586();
1142                 wait_for_scb_cmd(dev);
1143                 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1144                 writeb(CUC_START, &p->scb->cmd_cuc);
1145                 ni_attn586();
1146                 wait_for_scb_cmd(dev);
1147                 dev->trans_start = jiffies;
1148                 return 0;
1149         }
1150 #endif
1151         {
1152 #ifdef DEBUG
1153                 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1154                                 dev->name, readb(&p->scb->cus));
1155                 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1156                                 dev->name,
1157                                 readw(&p->xmit_cmds[0]->cmd_status),
1158                                 readw(&p->xmit_cmds[1]->cmd_status));
1159                 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1160                                 dev->name);
1161 #endif
1162                 ni52_close(dev);
1163                 ni52_open(dev);
1164         }
1165         dev->trans_start = jiffies;
1166 }
1167
1168 /******************************************************
1169  * send frame
1170  */
1171
1172 static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
1173 {
1174         int len, i;
1175 #ifndef NO_NOPCOMMANDS
1176         int next_nop;
1177 #endif
1178         struct priv *p = (struct priv *) dev->priv;
1179
1180         if (skb->len > XMIT_BUFF_SIZE) {
1181                 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);
1182                 return 0;
1183         }
1184
1185         netif_stop_queue(dev);
1186
1187         skb_copy_from_linear_data(skb, (char *)p->xmit_cbuffs[p->xmit_count],
1188                                                         skb->len);
1189         len = skb->len;
1190         if (len < ETH_ZLEN) {
1191                 len = ETH_ZLEN;
1192                 memset((char *)p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1193                                                         len - skb->len);
1194         }
1195
1196 #if (NUM_XMIT_BUFFS == 1)
1197 #       ifdef NO_NOPCOMMANDS
1198
1199 #ifdef DEBUG
1200         if (p->scb->cus & CU_ACTIVE) {
1201                 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1202                 printk(KERN_ERR "%s: stat: %04x %04x\n",
1203                                 dev->name, readb(&p->scb->cus),
1204                                 readw(&p->xmit_cmds[0]->cmd_status));
1205         }
1206 #endif
1207         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);;
1208         for (i = 0; i < 16; i++) {
1209                 writew(0, &p->xmit_cmds[0]->cmd_status);
1210                 wait_for_scb_cmd(dev);
1211                 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1212                         writeb(CUC_RESUME, &p->scb->cmd_cuc);
1213                 else {
1214                         writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1215                         writeb(CUC_START, &p->scb->cmd_cuc);
1216                 }
1217                 ni_attn586();
1218                 dev->trans_start = jiffies;
1219                 if (!i)
1220                         dev_kfree_skb(skb);
1221                 wait_for_scb_cmd(dev);
1222                 /* test it, because CU sometimes doesn't start immediately */
1223                 if (readb(&p->scb->cus) & CU_ACTIVE)
1224                         break;
1225                 if (readw(&p->xmit_cmds[0]->cmd_status))
1226                         break;
1227                 if (i == 15)
1228                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1229         }
1230 #       else
1231         next_nop = (p->nop_point + 1) & 0x1;
1232         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1233         writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1234         writew(make16(p->nop_cmds[next_nop]),
1235                                 &p->nop_cmds[next_nop]->cmd_link);
1236         writew(0, &p->xmit_cmds[0]->cmd_status);
1237         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1238
1239         writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1240         dev->trans_start = jiffies;
1241         p->nop_point = next_nop;
1242         dev_kfree_skb(skb);
1243 #       endif
1244 #else
1245         writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1246         next_nop = p->xmit_count + 1
1247         if (next_nop == NUM_XMIT_BUFFS)
1248                 next_nop = 0;
1249         writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1250         /* linkpointer of xmit-command already points to next nop cmd */
1251         writew(make16(p->nop_cmds[next_nop]),
1252                                 &p->nop_cmds[next_nop]->cmd_link);
1253         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1254         writew(make16(p->xmit_cmds[p->xmit_count]),
1255                                 &p->nop_cmds[p->xmit_count]->cmd_link);
1256         dev->trans_start = jiffies;
1257         p->xmit_count = next_nop;
1258         {
1259                 unsigned long flags;
1260                 spin_lock_irqsave(&p->spinlock);
1261                 if (p->xmit_count != p->xmit_last)
1262                         netif_wake_queue(dev);
1263                 spin_unlock_irqrestore(&p->spinlock);
1264         }
1265         dev_kfree_skb(skb);
1266 #endif
1267         return 0;
1268 }
1269
1270 /*******************************************
1271  * Someone wanna have the statistics
1272  */
1273
1274 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1275 {
1276         struct priv *p = (struct priv *) dev->priv;
1277         unsigned short crc, aln, rsc, ovrn;
1278
1279         /* Get error-statistics from the ni82586 */
1280         crc = readw(&p->scb->crc_errs);
1281         writew(0, &p->scb->crc_errs);
1282         aln = readw(&p->scb->aln_errs);
1283         writew(0, &p->scb->aln_errs);
1284         rsc = readw(&p->scb->rsc_errs);
1285         writew(0, &p->scb->rsc_errs);
1286         ovrn = readw(&p->scb->ovrn_errs);
1287         writew(0, &p->scb->ovrn_errs);
1288
1289         p->stats.rx_crc_errors += crc;
1290         p->stats.rx_fifo_errors += ovrn;
1291         p->stats.rx_frame_errors += aln;
1292         p->stats.rx_dropped += rsc;
1293
1294         return &p->stats;
1295 }
1296
1297 /********************************************************
1298  * Set MC list ..
1299  */
1300
1301 static void set_multicast_list(struct net_device *dev)
1302 {
1303         netif_stop_queue(dev);
1304         ni_disint();
1305         alloc586(dev);
1306         init586(dev);
1307         startrecv586(dev);
1308         ni_enaint();
1309         netif_wake_queue(dev);
1310 }
1311
1312 #ifdef MODULE
1313 static struct net_device *dev_ni52;
1314
1315 module_param(io, int, 0);
1316 module_param(irq, int, 0);
1317 module_param(memstart, long, 0);
1318 module_param(memend, long, 0);
1319 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1320 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1321 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1322 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1323
1324 int __init init_module(void)
1325 {
1326         if (io <= 0x0 || !memend || !memstart || irq < 2) {
1327                 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1328                 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1329                 return -ENODEV;
1330         }
1331         dev_ni52 = ni52_probe(-1);
1332         if (IS_ERR(dev_ni52))
1333                 return PTR_ERR(dev_ni52);
1334         return 0;
1335 }
1336
1337 void __exit cleanup_module(void)
1338 {
1339         struct priv *p = dev_ni52->priv;
1340         unregister_netdev(dev_ni52);
1341         iounmap(p->mapped);
1342         release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1343         free_netdev(dev_ni52);
1344 }
1345 #endif /* MODULE */
1346
1347 MODULE_LICENSE("GPL");
1348
1349 /*
1350  * END: linux/drivers/net/ni52.c
1351  */