err.no 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 /**********************************************
 298  * Check to see if there's an 82586 out there.
 299  */
 300 static int check586(struct net_device *dev, unsigned size)
 301 {
 302         unsigned long where = dev->mem_start;
 303         struct priv *p = dev->priv;
 304         char __iomem *iscp_addrs[2];
 305         int i;
 306
 307         p->mapped = (char __iomem *)isa_bus_to_virt(where);
 308         p->base = p->mapped + size - 0x01000000;
 309         p->memtop = p->mapped + size;
 310         p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
 311         p->scb  = (struct scb_struct __iomem *) p->mapped;
 312         memset_io(p->scp, 0, sizeof(struct scp_struct));
 313         for (i = 0; i < sizeof(struct scp_struct); i++)
 314                 /* memory was writeable? */
 315                 if (readb((char __iomem *)p->scp + i))
 316                         return 0;
 317         writeb(SYSBUSVAL, &p->scp->sysbus);     /* 1 = 8Bit-Bus, 0 = 16 Bit */
 318         if (readb(&p->scp->sysbus) != SYSBUSVAL)
 319                 return 0;
 320
 321         iscp_addrs[0] = p->mapped;
 322         iscp_addrs[1] = (char __iomem *)p->scp - sizeof(struct iscp_struct);
 323
 324         for (i = 0; i < 2; i++) {
 325                 p->iscp = (struct iscp_struct __iomem *) iscp_addrs[i];
 326                 memset_io(p->iscp, 0, sizeof(struct iscp_struct));
 327
 328                 writel(make24(p->iscp), &p->scp->iscp);
 329                 writeb(1, &p->iscp->busy);
 330
 331                 ni_reset586();
 332                 ni_attn586();
 333                 mdelay(32);     /* wait a while... */
 334                 /* i82586 clears 'busy' after successful init */
 335                 if (readb(&p->iscp->busy))
 336                         return 0;
 337         }
 338
 339         p->iscp = (struct iscp_struct __iomem *)
 340                         ((char __iomem *)p->scp - sizeof(struct iscp_struct));
 341         return 1;
 342 }
 343
 344 /******************************************************************
 345  * set iscp at the right place, called by ni52_probe1 and open586.
 346  */
 347 static void alloc586(struct net_device *dev)
 348 {
 349         struct priv *p =        (struct priv *) dev->priv;
 350
 351         ni_reset586();
 352         mdelay(32);
 353
 354         memset_io(p->iscp, 0, sizeof(struct iscp_struct));
 355         memset_io(p->scp , 0, sizeof(struct scp_struct));
 356
 357         writel(make24(p->iscp), &p->scp->iscp);
 358         writeb(SYSBUSVAL, &p->scp->sysbus);
 359         writew(make16(p->scb), &p->iscp->scb_offset);
 360
 361         writeb(1, &p->iscp->busy);
 362         ni_reset586();
 363         ni_attn586();
 364
 365         mdelay(32);
 366
 367         if (readb(&p->iscp->busy))
 368                 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
 369
 370         p->reset = 0;
 371
 372         memset_io(p->scb, 0, sizeof(struct scb_struct));
 373 }
 374
 375 /* set: io,irq,memstart,memend or set it when calling insmod */
 376 static int irq = 9;
 377 static int io = 0x300;
 378 static long memstart;   /* e.g 0xd0000 */
 379 static long memend;     /* e.g 0xd4000 */
 380
 381 /**********************************************
 382  * probe the ni5210-card
 383  */
 384 struct net_device * __init ni52_probe(int unit)
 385 {
 386         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
 387         static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
 388         int *port;
 389         int err = 0;
 390
 391         if (!dev)
 392                 return ERR_PTR(-ENOMEM);
 393
 394         if (unit >= 0) {
 395                 sprintf(dev->name, "eth%d", unit);
 396                 netdev_boot_setup_check(dev);
 397                 io = dev->base_addr;
 398                 irq = dev->irq;
 399                 memstart = dev->mem_start;
 400                 memend = dev->mem_end;
 401         }
 402
 403         if (io > 0x1ff) {       /* Check a single specified location. */
 404                 err = ni52_probe1(dev, io);
 405         } else if (io > 0) {            /* Don't probe at all. */
 406                 err = -ENXIO;
 407         } else {
 408                 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
 409                         ;
 410                 if (*port)
 411                         goto got_it;
 412 #ifdef FULL_IO_PROBE
 413                 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
 414                         ;
 415                 if (io < 0x400)
 416                         goto got_it;
 417 #endif
 418                 err = -ENODEV;
 419         }
 420         if (err)
 421                 goto out;
 422 got_it:
 423         err = register_netdev(dev);
 424         if (err)
 425                 goto out1;
 426         return dev;
 427 out1:
 428         release_region(dev->base_addr, NI52_TOTAL_SIZE);
 429 out:
 430         free_netdev(dev);
 431         return ERR_PTR(err);
 432 }
 433
 434 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
 435 {
 436         int i, size, retval;
 437         struct priv *priv = dev->priv;
 438
 439         dev->base_addr = ioaddr;
 440         dev->irq = irq;
 441         dev->mem_start = memstart;
 442         dev->mem_end = memend;
 443
 444         spin_lock_init(&priv->spinlock);
 445
 446         if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
 447                 return -EBUSY;
 448
 449         if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
 450             !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
 451                 retval = -ENODEV;
 452                 goto out;
 453         }
 454
 455         for (i = 0; i < ETH_ALEN; i++)
 456                 dev->dev_addr[i] = inb(dev->base_addr+i);
 457
 458         if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
 459                  || dev->dev_addr[2] != NI52_ADDR2) {
 460                 retval = -ENODEV;
 461                 goto out;
 462         }
 463
 464         printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
 465                                 dev->name, dev->base_addr);
 466
 467         /*
 468          * check (or search) IO-Memory, 8K and 16K
 469          */
 470 #ifdef MODULE
 471         size = dev->mem_end - dev->mem_start;
 472         if (size != 0x2000 && size != 0x4000) {
 473                 printk("\n");
 474                 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
 475                 retval = -ENODEV;
 476                 goto out;
 477         }
 478         if (!check586(dev, size)) {
 479                 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
 480                 retval = -ENODEV;
 481                 goto out;
 482         }
 483 #else
 484         if (dev->mem_start != 0) {
 485                 /* no auto-mem-probe */
 486                 size = 0x4000; /* check for 16K mem */
 487                 if (!check586(dev, size)) {
 488                         size = 0x2000; /* check for 8K mem */
 489                         if (!check586(dev, size)) {
 490                                 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
 491                                 retval = -ENODEV;
 492                                 goto out;
 493                         }
 494                 }
 495         } else {
 496                 static const unsigned long memaddrs[] = {
 497                         0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
 498                         0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
 499                 };
 500                 for (i = 0;; i++) {
 501                         if (!memaddrs[i]) {
 502                                 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
 503                                 retval = -ENODEV;
 504                                 goto out;
 505                         }
 506                         dev->mem_start = memaddrs[i];
 507                         size = 0x2000; /* check for 8K mem */
 508                         if (check586(dev, size))
 509                                 /* 8K-check */
 510                                 break;
 511                         size = 0x4000; /* check for 16K mem */
 512                         if (check586(dev, size))
 513                                 /* 16K-check */
 514                                 break;
 515                 }
 516         }
 517         /* set mem_end showed by 'ifconfig' */
 518         dev->mem_end = dev->mem_start + size;
 519 #endif
 520
 521         alloc586(dev);
 522
 523         /* set number of receive-buffs according to memsize */
 524         if (size == 0x2000)
 525                 priv->num_recv_buffs = NUM_RECV_BUFFS_8;
 526         else
 527                 priv->num_recv_buffs = NUM_RECV_BUFFS_16;
 528
 529         printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
 530                                 dev->mem_start, size);
 531
 532         if (dev->irq < 2) {
 533                 unsigned long irq_mask;
 534
 535                 irq_mask = probe_irq_on();
 536                 ni_reset586();
 537                 ni_attn586();
 538
 539                 mdelay(20);
 540                 dev->irq = probe_irq_off(irq_mask);
 541                 if (!dev->irq) {
 542                         printk("?autoirq, Failed to detect IRQ line!\n");
 543                         retval = -EAGAIN;
 544                         goto out;
 545                 }
 546                 printk("IRQ %d (autodetected).\n", dev->irq);
 547         } else {
 548                 if (dev->irq == 2)
 549                         dev->irq = 9;
 550                 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
 551         }
 552
 553         dev->open               = ni52_open;
 554         dev->stop               = ni52_close;
 555         dev->get_stats          = ni52_get_stats;
 556         dev->tx_timeout         = ni52_timeout;
 557         dev->watchdog_timeo     = HZ/20;
 558         dev->hard_start_xmit    = ni52_send_packet;
 559         dev->set_multicast_list = set_multicast_list;
 560
 561         dev->if_port            = 0;
 562
 563         return 0;
 564 out:
 565         release_region(ioaddr, NI52_TOTAL_SIZE);
 566         return retval;
 567 }
 568
 569 /**********************************************
 570  * init the chip (ni52-interrupt should be disabled?!)
 571  * needs a correct 'allocated' memory
 572  */
 573
 574 static int init586(struct net_device *dev)
 575 {
 576         void __iomem *ptr;
 577         int i, result = 0;
 578         struct priv *p = (struct priv *)dev->priv;
 579         struct configure_cmd_struct __iomem *cfg_cmd;
 580         struct iasetup_cmd_struct __iomem *ias_cmd;
 581         struct tdr_cmd_struct __iomem *tdr_cmd;
 582         struct mcsetup_cmd_struct __iomem *mc_cmd;
 583         struct dev_mc_list *dmi = dev->mc_list;
 584         int num_addrs = dev->mc_count;
 585
 586         ptr = p->scb + 1;
 587
 588         cfg_cmd = ptr; /* configure-command */
 589         writew(0, &cfg_cmd->cmd_status);
 590         writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
 591         writew(0xFFFF, &cfg_cmd->cmd_link);
 592
 593         /* number of cfg bytes */
 594         writeb(0x0a, &cfg_cmd->byte_cnt);
 595         /* fifo-limit (8=tx:32/rx:64) */
 596         writeb(fifo, &cfg_cmd->fifo);
 597         /* hold or discard bad recv frames (bit 7) */
 598         writeb(0x40, &cfg_cmd->sav_bf);
 599         /* addr_len |!src_insert |pre-len |loopback */
 600         writeb(0x2e, &cfg_cmd->adr_len);
 601         writeb(0x00, &cfg_cmd->priority);
 602         writeb(0x60, &cfg_cmd->ifs);;
 603         writeb(0x00, &cfg_cmd->time_low);
 604         writeb(0xf2, &cfg_cmd->time_high);
 605         writeb(0x00, &cfg_cmd->promisc);;
 606         if (dev->flags & IFF_ALLMULTI) {
 607                 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
 608                 if (num_addrs > len) {
 609                         printk(KERN_ERR "%s: switching to promisc. mode\n",
 610                                 dev->name);
 611                         dev->flags |= IFF_PROMISC;
 612                 }
 613         }
 614         if (dev->flags & IFF_PROMISC)
 615                 writeb(0x01, &cfg_cmd->promisc);
 616         writeb(0x00, &cfg_cmd->carr_coll);
 617         writew(make16(cfg_cmd), &p->scb->cbl_offset);
 618         writew(0, &p->scb->cmd_ruc);
 619
 620         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 621         ni_attn586();
 622
 623         wait_for_stat_compl(cfg_cmd);
 624
 625         if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 626                                                         (STAT_COMPL|STAT_OK)) {
 627                 printk(KERN_ERR "%s: configure command failed: %x\n",
 628                                 dev->name, readw(&cfg_cmd->cmd_status));
 629                 return 1;
 630         }
 631
 632         /*
 633          * individual address setup
 634          */
 635
 636         ias_cmd = ptr;
 637
 638         writew(0, &ias_cmd->cmd_status);
 639         writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
 640         writew(0xffff, &ias_cmd->cmd_link);
 641
 642         memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
 643
 644         writew(make16(ias_cmd), &p->scb->cbl_offset);
 645
 646         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 647         ni_attn586();
 648
 649         wait_for_stat_compl(ias_cmd);
 650
 651         if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 652                                                         (STAT_OK|STAT_COMPL)) {
 653                 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
 654                 return 1;
 655         }
 656
 657         /*
 658          * TDR, wire check .. e.g. no resistor e.t.c
 659          */
 660
 661         tdr_cmd = ptr;
 662
 663         writew(0, &tdr_cmd->cmd_status);
 664         writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
 665         writew(0xffff, &tdr_cmd->cmd_link);
 666         writew(0, &tdr_cmd->status);
 667
 668         writew(make16(tdr_cmd), &p->scb->cbl_offset);
 669         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 670         ni_attn586();
 671
 672         wait_for_stat_compl(tdr_cmd);
 673
 674         if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
 675                 printk(KERN_ERR "%s: Problems while running the TDR.\n",
 676                                 dev->name);
 677         else {
 678                 udelay(16);
 679                 result = readw(&tdr_cmd->status);
 680                 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 681                 ni_attn586(); /* ack the interrupts */
 682
 683                 if (result & TDR_LNK_OK)
 684                         ;
 685                 else if (result & TDR_XCVR_PRB)
 686                         printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
 687                                 dev->name);
 688                 else if (result & TDR_ET_OPN)
 689                         printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
 690                                 dev->name, result & TDR_TIMEMASK);
 691                 else if (result & TDR_ET_SRT) {
 692                         /* time == 0 -> strange :-) */
 693                         if (result & TDR_TIMEMASK)
 694                                 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
 695                                         dev->name, result & TDR_TIMEMASK);
 696                 } else
 697                         printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
 698                                                 dev->name, result);
 699         }
 700
 701         /*
 702          * Multicast setup
 703          */
 704         if (num_addrs && !(dev->flags & IFF_PROMISC)) {
 705                 mc_cmd = ptr;
 706                 writew(0, &mc_cmd->cmd_status);
 707                 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
 708                 writew(0xffff, &mc_cmd->cmd_link);
 709                 writew(num_addrs * 6, &mc_cmd->mc_cnt);
 710
 711                 for (i = 0; i < num_addrs; i++, dmi = dmi->next)
 712                         memcpy_toio(mc_cmd->mc_list[i],
 713                                                         dmi->dmi_addr, 6);
 714
 715                 writew(make16(mc_cmd), &p->scb->cbl_offset);
 716                 writeb(CUC_START, &p->scb->cmd_cuc);
 717                 ni_attn586();
 718
 719                 wait_for_stat_compl(mc_cmd);
 720
 721                 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
 722                                                  != (STAT_COMPL|STAT_OK))
 723                         printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
 724         }
 725
 726         /*
 727          * alloc nop/xmit-cmds
 728          */
 729 #if (NUM_XMIT_BUFFS == 1)
 730         for (i = 0; i < 2; i++) {
 731                 p->nop_cmds[i] = ptr;
 732                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 733                 writew(0, &p->nop_cmds[i]->cmd_status);
 734                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 735                 ptr = ptr + sizeof(struct nop_cmd_struct);
 736         }
 737 #else
 738         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 739                 p->nop_cmds[i] = ptr;
 740                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 741                 writew(0, &p->nop_cmds[i]->cmd_status);
 742                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 743                 ptr = ptr + sizeof(struct nop_cmd_struct);
 744         }
 745 #endif
 746
 747         ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
 748
 749         /*
 750          * alloc xmit-buffs / init xmit_cmds
 751          */
 752         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 753                 /* Transmit cmd/buff 0 */
 754                 p->xmit_cmds[i] = ptr;
 755                 ptr = ptr + sizeof(struct transmit_cmd_struct);
 756                 p->xmit_cbuffs[i] = ptr; /* char-buffs */
 757                 ptr = ptr + XMIT_BUFF_SIZE;
 758                 p->xmit_buffs[i] = ptr; /* TBD */
 759                 ptr = ptr + sizeof(struct tbd_struct);
 760                 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
 761                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
 762                                 dev->name);
 763                         return 1;
 764                 }
 765                 memset_io(p->xmit_cmds[i], 0,
 766                                         sizeof(struct transmit_cmd_struct));
 767                 memset_io(p->xmit_buffs[i], 0,
 768                                         sizeof(struct tbd_struct));
 769                 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
 770                                         &p->xmit_cmds[i]->cmd_link);
 771                 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
 772                 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
 773                 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
 774                 writew(0xffff, &p->xmit_buffs[i]->next);
 775                 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
 776         }
 777
 778         p->xmit_count = 0;
 779         p->xmit_last    = 0;
 780 #ifndef NO_NOPCOMMANDS
 781         p->nop_point    = 0;
 782 #endif
 783
 784          /*
 785                 * 'start transmitter'
 786                 */
 787 #ifndef NO_NOPCOMMANDS
 788         writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
 789         writeb(CUC_START, &p->scb->cmd_cuc);
 790         ni_attn586();
 791         wait_for_scb_cmd(dev);
 792 #else
 793         writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
 794         writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
 795 #endif
 796
 797         /*
 798          * ack. interrupts
 799          */
 800         writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 801         ni_attn586();
 802         udelay(16);
 803
 804         ni_enaint();
 805
 806         return 0;
 807 }
 808
 809 /******************************************************
 810  * This is a helper routine for ni52_rnr_int() and init586().
 811  * It sets up the Receive Frame Area (RFA).
 812  */
 813
 814 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
 815 {
 816         struct rfd_struct __iomem *rfd = ptr;
 817         struct rbd_struct __iomem *rbd;
 818         int i;
 819         struct priv *p = (struct priv *) dev->priv;
 820
 821         memset_io(rfd, 0,
 822                 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
 823         p->rfd_first = rfd;
 824
 825         for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
 826                 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
 827                         &rfd[i].next);
 828                 writew(0xffff, &rfd[i].rbd_offset);
 829         }
 830         /* RU suspend */
 831         writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
 832
 833         ptr = rfd + (p->num_recv_buffs + rfdadd);
 834
 835         rbd = ptr;
 836         ptr = rbd + p->num_recv_buffs;
 837
 838          /* clr descriptors */
 839         memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
 840
 841         for (i = 0; i < p->num_recv_buffs; i++) {
 842                 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
 843                 writew(RECV_BUFF_SIZE, &rbd[i].size);
 844                 writel(make24(ptr), &rbd[i].buffer);
 845                 ptr = ptr + RECV_BUFF_SIZE;
 846         }
 847         p->rfd_top      = p->rfd_first;
 848         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
 849
 850         writew(make16(p->rfd_first), &p->scb->rfa_offset);
 851         writew(make16(rbd), &p->rfd_first->rbd_offset);
 852
 853         return ptr;
 854 }
 855
 856
 857 /**************************************************
 858  * Interrupt Handler ...
 859  */
 860
 861 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
 862 {
 863         struct net_device *dev = dev_id;
 864         unsigned int stat;
 865         int cnt = 0;
 866         struct priv *p;
 867
 868         p = (struct priv *) dev->priv;
 869
 870         if (debuglevel > 1)
 871                 printk("I");
 872
 873         spin_lock(&p->spinlock);
 874
 875         wait_for_scb_cmd(dev); /* wait for last command */
 876
 877         while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
 878                 writeb(stat, &p->scb->cmd_cuc);
 879                 ni_attn586();
 880
 881                 if (stat & STAT_FR)      /* received a frame */
 882                         ni52_rcv_int(dev);
 883
 884                 if (stat & STAT_RNR) { /* RU went 'not ready' */
 885                         printk("(R)");
 886                         if (readb(&p->scb->rus) & RU_SUSPEND) {
 887                                 /* special case: RU_SUSPEND */
 888                                 wait_for_scb_cmd(dev);
 889                                 p->scb->cmd_ruc = RUC_RESUME;
 890                                 ni_attn586();
 891                                 wait_for_scb_cmd_ruc(dev);
 892                         } else {
 893                                 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
 894                                         dev->name, stat, readb(&p->scb->rus));
 895                                 ni52_rnr_int(dev);
 896                         }
 897                 }
 898
 899                 /* Command with I-bit set complete */
 900                 if (stat & STAT_CX)
 901                          ni52_xmt_int(dev);
 902
 903 #ifndef NO_NOPCOMMANDS
 904                 if (stat & STAT_CNA) {  /* CU went 'not ready' */
 905                         if (netif_running(dev))
 906                                 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
 907                                         dev->name, stat, readb(&p->scb->cus));
 908                 }
 909 #endif
 910
 911                 if (debuglevel > 1)
 912                         printk("%d", cnt++);
 913
 914                 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
 915                 wait_for_scb_cmd(dev);
 916                 if (p->scb->cmd_cuc) {   /* timed out? */
 917                         printk(KERN_ERR "%s: Acknowledge timed out.\n",
 918                                 dev->name);
 919                         ni_disint();
 920                         break;
 921                 }
 922         }
 923         spin_unlock(&p->spinlock);
 924
 925         if (debuglevel > 1)
 926                 printk("i");
 927         return IRQ_HANDLED;
 928 }
 929
 930 /*******************************************************
 931  * receive-interrupt
 932  */
 933
 934 static void ni52_rcv_int(struct net_device *dev)
 935 {
 936         int status, cnt = 0;
 937         unsigned short totlen;
 938         struct sk_buff *skb;
 939         struct rbd_struct __iomem *rbd;
 940         struct priv *p = (struct priv *)dev->priv;
 941
 942         if (debuglevel > 0)
 943                 printk("R");
 944
 945         for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
 946                 rbd = (struct rbd_struct __iomem *) make32(p->rfd_top->rbd_offset);
 947                 if (status & RFD_OK) { /* frame received without error? */
 948                         totlen = readw(&rbd->status);
 949                         if (totlen & RBD_LAST) {
 950                                 /* the first and the last buffer? */
 951                                 totlen &= RBD_MASK; /* length of this frame */
 952                                 writew(0x00, &rbd->status);
 953                                 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
 954                                 if (skb != NULL) {
 955                                         skb_reserve(skb, 2);
 956                                         skb_put(skb, totlen);
 957                                         skb_copy_to_linear_data(skb, p->base + (unsigned long) rbd->buffer, totlen);
 958                                         skb->protocol = eth_type_trans(skb, dev);
 959                                         netif_rx(skb);
 960                                         dev->last_rx = jiffies;
 961                                         p->stats.rx_packets++;
 962                                         p->stats.rx_bytes += totlen;
 963                                 } else
 964                                         p->stats.rx_dropped++;
 965                         } else {
 966                                 int rstat;
 967                                  /* free all RBD's until RBD_LAST is set */
 968                                 totlen = 0;
 969                                 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
 970                                         totlen += rstat & RBD_MASK;
 971                                         if (!rstat) {
 972                                                 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
 973                                                 break;
 974                                         }
 975                                         writew(0, &rbd->status);
 976                                         rbd = (struct rbd_struct __iomem *) make32(readl(&rbd->next));
 977                                 }
 978                                 totlen += rstat & RBD_MASK;
 979                                 writew(0, &rbd->status);
 980                                 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
 981                                         dev->name, totlen);
 982                                 p->stats.rx_dropped++;
 983                          }
 984                 } else {/* frame !(ok), only with 'save-bad-frames' */
 985                         printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
 986                                 dev->name, status);
 987                         p->stats.rx_errors++;
 988                 }
 989                 writeb(0, &p->rfd_top->stat_high);
 990                 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
 991                 writew(0xffff, &p->rfd_top->rbd_offset);
 992                 writeb(0, &p->rfd_last->last);  /* delete RFD_SUSP      */
 993                 p->rfd_last = p->rfd_top;
 994                 p->rfd_top = (struct rfd_struct __iomem *) make32(p->rfd_top->next); /* step to next RFD */
 995                 writew(make16(p->rfd_top), &p->scb->rfa_offset);
 996
 997                 if (debuglevel > 0)
 998                         printk("%d", cnt++);
 999         }
1000
1001         if (automatic_resume) {
1002                 wait_for_scb_cmd(dev);
1003                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1004                 ni_attn586();
1005                 wait_for_scb_cmd_ruc(dev);
1006         }
1007
1008 #ifdef WAIT_4_BUSY
1009         {
1010                 int i;
1011                 for (i = 0; i < 1024; i++) {
1012                         if (p->rfd_top->status)
1013                                 break;
1014                         udelay(16);
1015                         if (i == 1023)
1016                                 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1017                 }
1018         }
1019 #endif
1020         if (debuglevel > 0)
1021                 printk("r");
1022 }
1023
1024 /**********************************************************
1025  * handle 'Receiver went not ready'.
1026  */
1027
1028 static void ni52_rnr_int(struct net_device *dev)
1029 {
1030         struct priv *p = (struct priv *) dev->priv;
1031
1032         p->stats.rx_errors++;
1033
1034         wait_for_scb_cmd(dev);          /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1035         writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1036         ni_attn586();
1037         wait_for_scb_cmd_ruc(dev);              /* wait for accept cmd. */
1038
1039         alloc_rfa(dev, p->rfd_first);
1040         /* maybe add a check here, before restarting the RU */
1041         startrecv586(dev); /* restart RU */
1042
1043         printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->rus);
1044
1045 }
1046
1047 /**********************************************************
1048  * handle xmit - interrupt
1049  */
1050
1051 static void ni52_xmt_int(struct net_device *dev)
1052 {
1053         int status;
1054         struct priv *p = (struct priv *) dev->priv;
1055
1056         if (debuglevel > 0)
1057                 printk("X");
1058
1059         status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1060         if (!(status & STAT_COMPL))
1061                 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1062
1063         if (status & STAT_OK) {
1064                 p->stats.tx_packets++;
1065                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1066         } else {
1067                 p->stats.tx_errors++;
1068                 if (status & TCMD_LATECOLL) {
1069                         printk(KERN_ERR "%s: late collision detected.\n",
1070                                 dev->name);
1071                         p->stats.collisions++;
1072                 } else if (status & TCMD_NOCARRIER) {
1073                         p->stats.tx_carrier_errors++;
1074                         printk(KERN_ERR "%s: no carrier detected.\n",
1075                                 dev->name);
1076                 } else if (status & TCMD_LOSTCTS)
1077                         printk(KERN_ERR "%s: loss of CTS detected.\n",
1078                                 dev->name);
1079                 else if (status & TCMD_UNDERRUN) {
1080                         p->stats.tx_fifo_errors++;
1081                         printk(KERN_ERR "%s: DMA underrun detected.\n",
1082                                 dev->name);
1083                 } else if (status & TCMD_MAXCOLL) {
1084                         printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1085                                 dev->name);
1086                         p->stats.collisions += 16;
1087                 }
1088         }
1089 #if (NUM_XMIT_BUFFS > 1)
1090         if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1091                 p->xmit_last = 0;
1092 #endif
1093         netif_wake_queue(dev);
1094 }
1095
1096 /***********************************************************
1097  * (re)start the receiver
1098  */
1099
1100 static void startrecv586(struct net_device *dev)
1101 {
1102         struct priv *p = (struct priv *) dev->priv;
1103
1104         wait_for_scb_cmd(dev);
1105         wait_for_scb_cmd_ruc(dev);
1106         writew(make16(p->rfd_first), &p->scb->rfa_offset);
1107         writeb(RUC_START, &p->scb->cmd_ruc);
1108         ni_attn586();           /* start cmd. */
1109         wait_for_scb_cmd_ruc(dev);
1110         /* wait for accept cmd. (no timeout!!) */
1111 }
1112
1113 static void ni52_timeout(struct net_device *dev)
1114 {
1115         struct priv *p = (struct priv *) dev->priv;
1116 #ifndef NO_NOPCOMMANDS
1117         if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1118                 netif_wake_queue(dev);
1119 #ifdef DEBUG
1120                 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1121                         dev->name);
1122                 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1123                         dev->name, (int)p->xmit_cmds[0]->cmd_status,
1124                         readw(&p->nop_cmds[0]->cmd_status),
1125                         readw(&p->nop_cmds[1]->cmd_status),
1126                         p->nop_point);
1127 #endif
1128                 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1129                 ni_attn586();
1130                 wait_for_scb_cmd(dev);
1131                 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1132                 writeb(CUC_START, &p->scb->cmd_cuc);
1133                 ni_attn586();
1134                 wait_for_scb_cmd(dev);
1135                 dev->trans_start = jiffies;
1136                 return 0;
1137         }
1138 #endif
1139         {
1140 #ifdef DEBUG
1141                 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1142                                 dev->name, readb(&p->scb->cus));
1143                 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1144                                 dev->name,
1145                                 readw(&p->xmit_cmds[0]->cmd_status),
1146                                 readw(&p->xmit_cmds[1]->cmd_status));
1147                 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1148                                 dev->name);
1149 #endif
1150                 ni52_close(dev);
1151                 ni52_open(dev);
1152         }
1153         dev->trans_start = jiffies;
1154 }
1155
1156 /******************************************************
1157  * send frame
1158  */
1159
1160 static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
1161 {
1162         int len, i;
1163 #ifndef NO_NOPCOMMANDS
1164         int next_nop;
1165 #endif
1166         struct priv *p = (struct priv *) dev->priv;
1167
1168         if (skb->len > XMIT_BUFF_SIZE) {
1169                 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);
1170                 return 0;
1171         }
1172
1173         netif_stop_queue(dev);
1174
1175         skb_copy_from_linear_data(skb, (char *)p->xmit_cbuffs[p->xmit_count],
1176                                                         skb->len);
1177         len = skb->len;
1178         if (len < ETH_ZLEN) {
1179                 len = ETH_ZLEN;
1180                 memset((char *)p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1181                                                         len - skb->len);
1182         }
1183
1184 #if (NUM_XMIT_BUFFS == 1)
1185 #       ifdef NO_NOPCOMMANDS
1186
1187 #ifdef DEBUG
1188         if (p->scb->cus & CU_ACTIVE) {
1189                 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1190                 printk(KERN_ERR "%s: stat: %04x %04x\n",
1191                                 dev->name, readb(&p->scb->cus),
1192                                 readw(&p->xmit_cmds[0]->cmd_status));
1193         }
1194 #endif
1195         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);;
1196         for (i = 0; i < 16; i++) {
1197                 writew(0, &p->xmit_cmds[0]->cmd_status);
1198                 wait_for_scb_cmd(dev);
1199                 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1200                         writeb(CUC_RESUME, &p->scb->cmd_cuc);
1201                 else {
1202                         writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1203                         writeb(CUC_START, &p->scb->cmd_cuc);
1204                 }
1205                 ni_attn586();
1206                 dev->trans_start = jiffies;
1207                 if (!i)
1208                         dev_kfree_skb(skb);
1209                 wait_for_scb_cmd(dev);
1210                 /* test it, because CU sometimes doesn't start immediately */
1211                 if (readb(&p->scb->cus) & CU_ACTIVE)
1212                         break;
1213                 if (readw(&p->xmit_cmds[0]->cmd_status))
1214                         break;
1215                 if (i == 15)
1216                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1217         }
1218 #       else
1219         next_nop = (p->nop_point + 1) & 0x1;
1220         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1221         writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1222         writew(make16(p->nop_cmds[next_nop]),
1223                                 &p->nop_cmds[next_nop]->cmd_link);
1224         writew(0, &p->xmit_cmds[0]->cmd_status);
1225         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1226
1227         writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1228         dev->trans_start = jiffies;
1229         p->nop_point = next_nop;
1230         dev_kfree_skb(skb);
1231 #       endif
1232 #else
1233         writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1234         next_nop = p->xmit_count + 1
1235         if (next_nop == NUM_XMIT_BUFFS)
1236                 next_nop = 0;
1237         writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1238         /* linkpointer of xmit-command already points to next nop cmd */
1239         writew(make16(p->nop_cmds[next_nop]),
1240                                 &p->nop_cmds[next_nop]->cmd_link);
1241         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1242         writew(make16(p->xmit_cmds[p->xmit_count]),
1243                                 &p->nop_cmds[p->xmit_count]->cmd_link);
1244         dev->trans_start = jiffies;
1245         p->xmit_count = next_nop;
1246         {
1247                 unsigned long flags;
1248                 spin_lock_irqsave(&p->spinlock);
1249                 if (p->xmit_count != p->xmit_last)
1250                         netif_wake_queue(dev);
1251                 spin_unlock_irqrestore(&p->spinlock);
1252         }
1253         dev_kfree_skb(skb);
1254 #endif
1255         return 0;
1256 }
1257
1258 /*******************************************
1259  * Someone wanna have the statistics
1260  */
1261
1262 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1263 {
1264         struct priv *p = (struct priv *) dev->priv;
1265         unsigned short crc, aln, rsc, ovrn;
1266
1267         /* Get error-statistics from the ni82586 */
1268         crc = readw(&p->scb->crc_errs);
1269         writew(0, &p->scb->crc_errs);
1270         aln = readw(&p->scb->aln_errs);
1271         writew(0, &p->scb->aln_errs);
1272         rsc = readw(&p->scb->rsc_errs);
1273         writew(0, &p->scb->rsc_errs);
1274         ovrn = readw(&p->scb->ovrn_errs);
1275         writew(0, &p->scb->ovrn_errs);
1276
1277         p->stats.rx_crc_errors += crc;
1278         p->stats.rx_fifo_errors += ovrn;
1279         p->stats.rx_frame_errors += aln;
1280         p->stats.rx_dropped += rsc;
1281
1282         return &p->stats;
1283 }
1284
1285 /********************************************************
1286  * Set MC list ..
1287  */
1288
1289 static void set_multicast_list(struct net_device *dev)
1290 {
1291         netif_stop_queue(dev);
1292         ni_disint();
1293         alloc586(dev);
1294         init586(dev);
1295         startrecv586(dev);
1296         ni_enaint();
1297         netif_wake_queue(dev);
1298 }
1299
1300 #ifdef MODULE
1301 static struct net_device *dev_ni52;
1302
1303 module_param(io, int, 0);
1304 module_param(irq, int, 0);
1305 module_param(memstart, long, 0);
1306 module_param(memend, long, 0);
1307 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1308 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1309 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1310 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1311
1312 int __init init_module(void)
1313 {
1314         if (io <= 0x0 || !memend || !memstart || irq < 2) {
1315                 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1316                 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1317                 return -ENODEV;
1318         }
1319         dev_ni52 = ni52_probe(-1);
1320         if (IS_ERR(dev_ni52))
1321                 return PTR_ERR(dev_ni52);
1322         return 0;
1323 }
1324
1325 void __exit cleanup_module(void)
1326 {
1327         unregister_netdev(dev_ni52);
1328         release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1329         free_netdev(dev_ni52);
1330 }
1331 #endif /* MODULE */
1332
1333 MODULE_LICENSE("GPL");
1334
1335 /*
1336  * END: linux/drivers/net/ni52.c
1337  */