Pileus Git - ~andy/linux/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 pb;
 304         struct priv *p = /* (struct priv *) dev->priv*/ &pb;
 305         char __iomem *iscp_addrs[2];
 306         int i;
 307
 308         p->mapped = (char __iomem *)isa_bus_to_virt(where);
 309         p->base = p->mapped + size - 0x01000000;
 310         p->memtop = p->mapped + size;
 311         p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
 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         return 1;
 339 }
 340
 341 /******************************************************************
 342  * set iscp at the right place, called by ni52_probe1 and open586.
 343  */
 344 static void alloc586(struct net_device *dev)
 345 {
 346         struct priv *p =        (struct priv *) dev->priv;
 347
 348         ni_reset586();
 349         mdelay(32);
 350
 351         spin_lock_init(&p->spinlock);
 352
 353         p->scp  = (struct scp_struct __iomem *) (p->base + SCP_DEFAULT_ADDRESS);
 354         p->scb  = (struct scb_struct __iomem *) isa_bus_to_virt(dev->mem_start);
 355         p->iscp = (struct iscp_struct __iomem *)
 356                         ((char __iomem *)p->scp - sizeof(struct iscp_struct));
 357
 358         memset_io(p->iscp, 0, sizeof(struct iscp_struct));
 359         memset_io(p->scp , 0, sizeof(struct scp_struct));
 360
 361         writel(make24(p->iscp), &p->scp->iscp);
 362         writeb(SYSBUSVAL, &p->scp->sysbus);
 363         writew(make16(p->scb), &p->iscp->scb_offset);
 364
 365         writeb(1, &p->iscp->busy);
 366         ni_reset586();
 367         ni_attn586();
 368
 369         mdelay(32);
 370
 371         if (readb(&p->iscp->busy))
 372                 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
 373
 374         p->reset = 0;
 375
 376         memset_io(p->scb, 0, sizeof(struct scb_struct));
 377 }
 378
 379 /* set: io,irq,memstart,memend or set it when calling insmod */
 380 static int irq = 9;
 381 static int io = 0x300;
 382 static long memstart;   /* e.g 0xd0000 */
 383 static long memend;     /* e.g 0xd4000 */
 384
 385 /**********************************************
 386  * probe the ni5210-card
 387  */
 388 struct net_device * __init ni52_probe(int unit)
 389 {
 390         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
 391         static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
 392         int *port;
 393         int err = 0;
 394
 395         if (!dev)
 396                 return ERR_PTR(-ENOMEM);
 397
 398         if (unit >= 0) {
 399                 sprintf(dev->name, "eth%d", unit);
 400                 netdev_boot_setup_check(dev);
 401                 io = dev->base_addr;
 402                 irq = dev->irq;
 403                 memstart = dev->mem_start;
 404                 memend = dev->mem_end;
 405         }
 406
 407         if (io > 0x1ff) {       /* Check a single specified location. */
 408                 err = ni52_probe1(dev, io);
 409         } else if (io > 0) {            /* Don't probe at all. */
 410                 err = -ENXIO;
 411         } else {
 412                 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
 413                         ;
 414                 if (*port)
 415                         goto got_it;
 416 #ifdef FULL_IO_PROBE
 417                 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
 418                         ;
 419                 if (io < 0x400)
 420                         goto got_it;
 421 #endif
 422                 err = -ENODEV;
 423         }
 424         if (err)
 425                 goto out;
 426 got_it:
 427         err = register_netdev(dev);
 428         if (err)
 429                 goto out1;
 430         return dev;
 431 out1:
 432         release_region(dev->base_addr, NI52_TOTAL_SIZE);
 433 out:
 434         free_netdev(dev);
 435         return ERR_PTR(err);
 436 }
 437
 438 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
 439 {
 440         int i, size, retval;
 441         struct priv *priv = dev->priv;
 442
 443         dev->base_addr = ioaddr;
 444         dev->irq = irq;
 445         dev->mem_start = memstart;
 446         dev->mem_end = memend;
 447
 448         if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
 449                 return -EBUSY;
 450
 451         if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
 452             !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
 453                 retval = -ENODEV;
 454                 goto out;
 455         }
 456
 457         for (i = 0; i < ETH_ALEN; i++)
 458                 dev->dev_addr[i] = inb(dev->base_addr+i);
 459
 460         if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
 461                  || dev->dev_addr[2] != NI52_ADDR2) {
 462                 retval = -ENODEV;
 463                 goto out;
 464         }
 465
 466         printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
 467                                 dev->name, dev->base_addr);
 468
 469         /*
 470          * check (or search) IO-Memory, 8K and 16K
 471          */
 472 #ifdef MODULE
 473         size = dev->mem_end - dev->mem_start;
 474         if (size != 0x2000 && size != 0x4000) {
 475                 printk("\n");
 476                 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
 477                 retval = -ENODEV;
 478                 goto out;
 479         }
 480         if (!check586(dev, size)) {
 481                 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
 482                 retval = -ENODEV;
 483                 goto out;
 484         }
 485 #else
 486         if (dev->mem_start != 0) {
 487                 /* no auto-mem-probe */
 488                 size = 0x4000; /* check for 16K mem */
 489                 if (!check586(dev, size)) {
 490                         size = 0x2000; /* check for 8K mem */
 491                         if (!check586(dev, size)) {
 492                                 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
 493                                 retval = -ENODEV;
 494                                 goto out;
 495                         }
 496                 }
 497         } else {
 498                 static const unsigned long memaddrs[] = {
 499                         0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
 500                         0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
 501                 };
 502                 for (i = 0;; i++) {
 503                         if (!memaddrs[i]) {
 504                                 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
 505                                 retval = -ENODEV;
 506                                 goto out;
 507                         }
 508                         dev->mem_start = memaddrs[i];
 509                         size = 0x2000; /* check for 8K mem */
 510                         if (check586(dev, size))
 511                                 /* 8K-check */
 512                                 break;
 513                         size = 0x4000; /* check for 16K mem */
 514                         if (check586(dev, size))
 515                                 /* 16K-check */
 516                                 break;
 517                 }
 518         }
 519         /* set mem_end showed by 'ifconfig' */
 520         dev->mem_end = dev->mem_start + size;
 521 #endif
 522
 523         memset(priv, 0, sizeof(struct priv));
 524
 525         priv->mapped = (char __iomem *)isa_bus_to_virt(dev->mem_start);
 526         priv->memtop = priv->mapped + size;
 527         priv->base =  priv->mapped + size - 0x01000000;
 528         alloc586(dev);
 529
 530         /* set number of receive-buffs according to memsize */
 531         if (size == 0x2000)
 532                 priv->num_recv_buffs = NUM_RECV_BUFFS_8;
 533         else
 534                 priv->num_recv_buffs = NUM_RECV_BUFFS_16;
 535
 536         printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
 537                                 dev->mem_start, size);
 538
 539         if (dev->irq < 2) {
 540                 unsigned long irq_mask;
 541
 542                 irq_mask = probe_irq_on();
 543                 ni_reset586();
 544                 ni_attn586();
 545
 546                 mdelay(20);
 547                 dev->irq = probe_irq_off(irq_mask);
 548                 if (!dev->irq) {
 549                         printk("?autoirq, Failed to detect IRQ line!\n");
 550                         retval = -EAGAIN;
 551                         goto out;
 552                 }
 553                 printk("IRQ %d (autodetected).\n", dev->irq);
 554         } else {
 555                 if (dev->irq == 2)
 556                         dev->irq = 9;
 557                 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
 558         }
 559
 560         dev->open               = ni52_open;
 561         dev->stop               = ni52_close;
 562         dev->get_stats          = ni52_get_stats;
 563         dev->tx_timeout         = ni52_timeout;
 564         dev->watchdog_timeo     = HZ/20;
 565         dev->hard_start_xmit    = ni52_send_packet;
 566         dev->set_multicast_list = set_multicast_list;
 567
 568         dev->if_port            = 0;
 569
 570         return 0;
 571 out:
 572         release_region(ioaddr, NI52_TOTAL_SIZE);
 573         return retval;
 574 }
 575
 576 /**********************************************
 577  * init the chip (ni52-interrupt should be disabled?!)
 578  * needs a correct 'allocated' memory
 579  */
 580
 581 static int init586(struct net_device *dev)
 582 {
 583         void __iomem *ptr;
 584         int i, result = 0;
 585         struct priv *p = (struct priv *)dev->priv;
 586         struct configure_cmd_struct __iomem *cfg_cmd;
 587         struct iasetup_cmd_struct __iomem *ias_cmd;
 588         struct tdr_cmd_struct __iomem *tdr_cmd;
 589         struct mcsetup_cmd_struct __iomem *mc_cmd;
 590         struct dev_mc_list *dmi = dev->mc_list;
 591         int num_addrs = dev->mc_count;
 592
 593         ptr = p->scb + 1;
 594
 595         cfg_cmd = ptr; /* configure-command */
 596         writew(0, &cfg_cmd->cmd_status);
 597         writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
 598         writew(0xFFFF, &cfg_cmd->cmd_link);
 599
 600         /* number of cfg bytes */
 601         writeb(0x0a, &cfg_cmd->byte_cnt);
 602         /* fifo-limit (8=tx:32/rx:64) */
 603         writeb(fifo, &cfg_cmd->fifo);
 604         /* hold or discard bad recv frames (bit 7) */
 605         writeb(0x40, &cfg_cmd->sav_bf);
 606         /* addr_len |!src_insert |pre-len |loopback */
 607         writeb(0x2e, &cfg_cmd->adr_len);
 608         writeb(0x00, &cfg_cmd->priority);
 609         writeb(0x60, &cfg_cmd->ifs);;
 610         writeb(0x00, &cfg_cmd->time_low);
 611         writeb(0xf2, &cfg_cmd->time_high);
 612         writeb(0x00, &cfg_cmd->promisc);;
 613         if (dev->flags & IFF_ALLMULTI) {
 614                 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
 615                 if (num_addrs > len) {
 616                         printk(KERN_ERR "%s: switching to promisc. mode\n",
 617                                 dev->name);
 618                         dev->flags |= IFF_PROMISC;
 619                 }
 620         }
 621         if (dev->flags & IFF_PROMISC)
 622                 writeb(0x01, &cfg_cmd->promisc);
 623         writeb(0x00, &cfg_cmd->carr_coll);
 624         writew(make16(cfg_cmd), &p->scb->cbl_offset);
 625         writew(0, &p->scb->cmd_ruc);
 626
 627         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 628         ni_attn586();
 629
 630         wait_for_stat_compl(cfg_cmd);
 631
 632         if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 633                                                         (STAT_COMPL|STAT_OK)) {
 634                 printk(KERN_ERR "%s: configure command failed: %x\n",
 635                                 dev->name, readw(&cfg_cmd->cmd_status));
 636                 return 1;
 637         }
 638
 639         /*
 640          * individual address setup
 641          */
 642
 643         ias_cmd = ptr;
 644
 645         writew(0, &ias_cmd->cmd_status);
 646         writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
 647         writew(0xffff, &ias_cmd->cmd_link);
 648
 649         memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
 650
 651         writew(make16(ias_cmd), &p->scb->cbl_offset);
 652
 653         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 654         ni_attn586();
 655
 656         wait_for_stat_compl(ias_cmd);
 657
 658         if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 659                                                         (STAT_OK|STAT_COMPL)) {
 660                 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
 661                 return 1;
 662         }
 663
 664         /*
 665          * TDR, wire check .. e.g. no resistor e.t.c
 666          */
 667
 668         tdr_cmd = ptr;
 669
 670         writew(0, &tdr_cmd->cmd_status);
 671         writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
 672         writew(0xffff, &tdr_cmd->cmd_link);
 673         writew(0, &tdr_cmd->status);
 674
 675         writew(make16(tdr_cmd), &p->scb->cbl_offset);
 676         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 677         ni_attn586();
 678
 679         wait_for_stat_compl(tdr_cmd);
 680
 681         if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
 682                 printk(KERN_ERR "%s: Problems while running the TDR.\n",
 683                                 dev->name);
 684         else {
 685                 udelay(16);
 686                 result = readw(&tdr_cmd->status);
 687                 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 688                 ni_attn586(); /* ack the interrupts */
 689
 690                 if (result & TDR_LNK_OK)
 691                         ;
 692                 else if (result & TDR_XCVR_PRB)
 693                         printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
 694                                 dev->name);
 695                 else if (result & TDR_ET_OPN)
 696                         printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
 697                                 dev->name, result & TDR_TIMEMASK);
 698                 else if (result & TDR_ET_SRT) {
 699                         /* time == 0 -> strange :-) */
 700                         if (result & TDR_TIMEMASK)
 701                                 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
 702                                         dev->name, result & TDR_TIMEMASK);
 703                 } else
 704                         printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
 705                                                 dev->name, result);
 706         }
 707
 708         /*
 709          * Multicast setup
 710          */
 711         if (num_addrs && !(dev->flags & IFF_PROMISC)) {
 712                 mc_cmd = ptr;
 713                 writew(0, &mc_cmd->cmd_status);
 714                 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
 715                 writew(0xffff, &mc_cmd->cmd_link);
 716                 writew(num_addrs * 6, &mc_cmd->mc_cnt);
 717
 718                 for (i = 0; i < num_addrs; i++, dmi = dmi->next)
 719                         memcpy_toio(mc_cmd->mc_list[i],
 720                                                         dmi->dmi_addr, 6);
 721
 722                 writew(make16(mc_cmd), &p->scb->cbl_offset);
 723                 writeb(CUC_START, &p->scb->cmd_cuc);
 724                 ni_attn586();
 725
 726                 wait_for_stat_compl(mc_cmd);
 727
 728                 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
 729                                                  != (STAT_COMPL|STAT_OK))
 730                         printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
 731         }
 732
 733         /*
 734          * alloc nop/xmit-cmds
 735          */
 736 #if (NUM_XMIT_BUFFS == 1)
 737         for (i = 0; i < 2; i++) {
 738                 p->nop_cmds[i] = ptr;
 739                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 740                 writew(0, &p->nop_cmds[i]->cmd_status);
 741                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 742                 ptr = ptr + sizeof(struct nop_cmd_struct);
 743         }
 744 #else
 745         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 746                 p->nop_cmds[i] = ptr;
 747                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 748                 writew(0, &p->nop_cmds[i]->cmd_status);
 749                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 750                 ptr = ptr + sizeof(struct nop_cmd_struct);
 751         }
 752 #endif
 753
 754         ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
 755
 756         /*
 757          * alloc xmit-buffs / init xmit_cmds
 758          */
 759         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 760                 /* Transmit cmd/buff 0 */
 761                 p->xmit_cmds[i] = ptr;
 762                 ptr = ptr + sizeof(struct transmit_cmd_struct);
 763                 p->xmit_cbuffs[i] = ptr; /* char-buffs */
 764                 ptr = ptr + XMIT_BUFF_SIZE;
 765                 p->xmit_buffs[i] = ptr; /* TBD */
 766                 ptr = ptr + sizeof(struct tbd_struct);
 767                 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
 768                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
 769                                 dev->name);
 770                         return 1;
 771                 }
 772                 memset_io(p->xmit_cmds[i], 0,
 773                                         sizeof(struct transmit_cmd_struct));
 774                 memset_io(p->xmit_buffs[i], 0,
 775                                         sizeof(struct tbd_struct));
 776                 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
 777                                         &p->xmit_cmds[i]->cmd_link);
 778                 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
 779                 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
 780                 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
 781                 writew(0xffff, &p->xmit_buffs[i]->next);
 782                 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
 783         }
 784
 785         p->xmit_count = 0;
 786         p->xmit_last    = 0;
 787 #ifndef NO_NOPCOMMANDS
 788         p->nop_point    = 0;
 789 #endif
 790
 791          /*
 792                 * 'start transmitter'
 793                 */
 794 #ifndef NO_NOPCOMMANDS
 795         writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
 796         writeb(CUC_START, &p->scb->cmd_cuc);
 797         ni_attn586();
 798         wait_for_scb_cmd(dev);
 799 #else
 800         writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
 801         writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
 802 #endif
 803
 804         /*
 805          * ack. interrupts
 806          */
 807         writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 808         ni_attn586();
 809         udelay(16);
 810
 811         ni_enaint();
 812
 813         return 0;
 814 }
 815
 816 /******************************************************
 817  * This is a helper routine for ni52_rnr_int() and init586().
 818  * It sets up the Receive Frame Area (RFA).
 819  */
 820
 821 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
 822 {
 823         struct rfd_struct __iomem *rfd = ptr;
 824         struct rbd_struct __iomem *rbd;
 825         int i;
 826         struct priv *p = (struct priv *) dev->priv;
 827
 828         memset_io(rfd, 0,
 829                 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
 830         p->rfd_first = rfd;
 831
 832         for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
 833                 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
 834                         &rfd[i].next);
 835                 writew(0xffff, &rfd[i].rbd_offset);
 836         }
 837         /* RU suspend */
 838         writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
 839
 840         ptr = rfd + (p->num_recv_buffs + rfdadd);
 841
 842         rbd = ptr;
 843         ptr = rbd + p->num_recv_buffs;
 844
 845          /* clr descriptors */
 846         memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
 847
 848         for (i = 0; i < p->num_recv_buffs; i++) {
 849                 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
 850                 writew(RECV_BUFF_SIZE, &rbd[i].size);
 851                 writel(make24(ptr), &rbd[i].buffer);
 852                 ptr = ptr + RECV_BUFF_SIZE;
 853         }
 854         p->rfd_top      = p->rfd_first;
 855         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
 856
 857         writew(make16(p->rfd_first), &p->scb->rfa_offset);
 858         writew(make16(rbd), &p->rfd_first->rbd_offset);
 859
 860         return ptr;
 861 }
 862
 863
 864 /**************************************************
 865  * Interrupt Handler ...
 866  */
 867
 868 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
 869 {
 870         struct net_device *dev = dev_id;
 871         unsigned int stat;
 872         int cnt = 0;
 873         struct priv *p;
 874
 875         p = (struct priv *) dev->priv;
 876
 877         if (debuglevel > 1)
 878                 printk("I");
 879
 880         spin_lock(&p->spinlock);
 881
 882         wait_for_scb_cmd(dev); /* wait for last command */
 883
 884         while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
 885                 writeb(stat, &p->scb->cmd_cuc);
 886                 ni_attn586();
 887
 888                 if (stat & STAT_FR)      /* received a frame */
 889                         ni52_rcv_int(dev);
 890
 891                 if (stat & STAT_RNR) { /* RU went 'not ready' */
 892                         printk("(R)");
 893                         if (readb(&p->scb->rus) & RU_SUSPEND) {
 894                                 /* special case: RU_SUSPEND */
 895                                 wait_for_scb_cmd(dev);
 896                                 p->scb->cmd_ruc = RUC_RESUME;
 897                                 ni_attn586();
 898                                 wait_for_scb_cmd_ruc(dev);
 899                         } else {
 900                                 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
 901                                         dev->name, stat, readb(&p->scb->rus));
 902                                 ni52_rnr_int(dev);
 903                         }
 904                 }
 905
 906                 /* Command with I-bit set complete */
 907                 if (stat & STAT_CX)
 908                          ni52_xmt_int(dev);
 909
 910 #ifndef NO_NOPCOMMANDS
 911                 if (stat & STAT_CNA) {  /* CU went 'not ready' */
 912                         if (netif_running(dev))
 913                                 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
 914                                         dev->name, stat, readb(&p->scb->cus));
 915                 }
 916 #endif
 917
 918                 if (debuglevel > 1)
 919                         printk("%d", cnt++);
 920
 921                 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
 922                 wait_for_scb_cmd(dev);
 923                 if (p->scb->cmd_cuc) {   /* timed out? */
 924                         printk(KERN_ERR "%s: Acknowledge timed out.\n",
 925                                 dev->name);
 926                         ni_disint();
 927                         break;
 928                 }
 929         }
 930         spin_unlock(&p->spinlock);
 931
 932         if (debuglevel > 1)
 933                 printk("i");
 934         return IRQ_HANDLED;
 935 }
 936
 937 /*******************************************************
 938  * receive-interrupt
 939  */
 940
 941 static void ni52_rcv_int(struct net_device *dev)
 942 {
 943         int status, cnt = 0;
 944         unsigned short totlen;
 945         struct sk_buff *skb;
 946         struct rbd_struct __iomem *rbd;
 947         struct priv *p = (struct priv *)dev->priv;
 948
 949         if (debuglevel > 0)
 950                 printk("R");
 951
 952         for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
 953                 rbd = (struct rbd_struct __iomem *) make32(p->rfd_top->rbd_offset);
 954                 if (status & RFD_OK) { /* frame received without error? */
 955                         totlen = readw(&rbd->status);
 956                         if (totlen & RBD_LAST) {
 957                                 /* the first and the last buffer? */
 958                                 totlen &= RBD_MASK; /* length of this frame */
 959                                 writew(0x00, &rbd->status);
 960                                 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
 961                                 if (skb != NULL) {
 962                                         skb_reserve(skb, 2);
 963                                         skb_put(skb, totlen);
 964                                         skb_copy_to_linear_data(skb, p->base + (unsigned long) rbd->buffer, totlen);
 965                                         skb->protocol = eth_type_trans(skb, dev);
 966                                         netif_rx(skb);
 967                                         dev->last_rx = jiffies;
 968                                         p->stats.rx_packets++;
 969                                         p->stats.rx_bytes += totlen;
 970                                 } else
 971                                         p->stats.rx_dropped++;
 972                         } else {
 973                                 int rstat;
 974                                  /* free all RBD's until RBD_LAST is set */
 975                                 totlen = 0;
 976                                 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
 977                                         totlen += rstat & RBD_MASK;
 978                                         if (!rstat) {
 979                                                 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
 980                                                 break;
 981                                         }
 982                                         writew(0, &rbd->status);
 983                                         rbd = (struct rbd_struct __iomem *) make32(readl(&rbd->next));
 984                                 }
 985                                 totlen += rstat & RBD_MASK;
 986                                 writew(0, &rbd->status);
 987                                 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
 988                                         dev->name, totlen);
 989                                 p->stats.rx_dropped++;
 990                          }
 991                 } else {/* frame !(ok), only with 'save-bad-frames' */
 992                         printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
 993                                 dev->name, status);
 994                         p->stats.rx_errors++;
 995                 }
 996                 writeb(0, &p->rfd_top->stat_high);
 997                 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
 998                 writew(0xffff, &p->rfd_top->rbd_offset);
 999                 writeb(0, &p->rfd_last->last);  /* delete RFD_SUSP      */
1000                 p->rfd_last = p->rfd_top;
1001                 p->rfd_top = (struct rfd_struct __iomem *) make32(p->rfd_top->next); /* step to next RFD */
1002                 writew(make16(p->rfd_top), &p->scb->rfa_offset);
1003
1004                 if (debuglevel > 0)
1005                         printk("%d", cnt++);
1006         }
1007
1008         if (automatic_resume) {
1009                 wait_for_scb_cmd(dev);
1010                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1011                 ni_attn586();
1012                 wait_for_scb_cmd_ruc(dev);
1013         }
1014
1015 #ifdef WAIT_4_BUSY
1016         {
1017                 int i;
1018                 for (i = 0; i < 1024; i++) {
1019                         if (p->rfd_top->status)
1020                                 break;
1021                         udelay(16);
1022                         if (i == 1023)
1023                                 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1024                 }
1025         }
1026 #endif
1027         if (debuglevel > 0)
1028                 printk("r");
1029 }
1030
1031 /**********************************************************
1032  * handle 'Receiver went not ready'.
1033  */
1034
1035 static void ni52_rnr_int(struct net_device *dev)
1036 {
1037         struct priv *p = (struct priv *) dev->priv;
1038
1039         p->stats.rx_errors++;
1040
1041         wait_for_scb_cmd(dev);          /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1042         writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1043         ni_attn586();
1044         wait_for_scb_cmd_ruc(dev);              /* wait for accept cmd. */
1045
1046         alloc_rfa(dev, p->rfd_first);
1047         /* maybe add a check here, before restarting the RU */
1048         startrecv586(dev); /* restart RU */
1049
1050         printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->rus);
1051
1052 }
1053
1054 /**********************************************************
1055  * handle xmit - interrupt
1056  */
1057
1058 static void ni52_xmt_int(struct net_device *dev)
1059 {
1060         int status;
1061         struct priv *p = (struct priv *) dev->priv;
1062
1063         if (debuglevel > 0)
1064                 printk("X");
1065
1066         status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1067         if (!(status & STAT_COMPL))
1068                 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1069
1070         if (status & STAT_OK) {
1071                 p->stats.tx_packets++;
1072                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1073         } else {
1074                 p->stats.tx_errors++;
1075                 if (status & TCMD_LATECOLL) {
1076                         printk(KERN_ERR "%s: late collision detected.\n",
1077                                 dev->name);
1078                         p->stats.collisions++;
1079                 } else if (status & TCMD_NOCARRIER) {
1080                         p->stats.tx_carrier_errors++;
1081                         printk(KERN_ERR "%s: no carrier detected.\n",
1082                                 dev->name);
1083                 } else if (status & TCMD_LOSTCTS)
1084                         printk(KERN_ERR "%s: loss of CTS detected.\n",
1085                                 dev->name);
1086                 else if (status & TCMD_UNDERRUN) {
1087                         p->stats.tx_fifo_errors++;
1088                         printk(KERN_ERR "%s: DMA underrun detected.\n",
1089                                 dev->name);
1090                 } else if (status & TCMD_MAXCOLL) {
1091                         printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1092                                 dev->name);
1093                         p->stats.collisions += 16;
1094                 }
1095         }
1096 #if (NUM_XMIT_BUFFS > 1)
1097         if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1098                 p->xmit_last = 0;
1099 #endif
1100         netif_wake_queue(dev);
1101 }
1102
1103 /***********************************************************
1104  * (re)start the receiver
1105  */
1106
1107 static void startrecv586(struct net_device *dev)
1108 {
1109         struct priv *p = (struct priv *) dev->priv;
1110
1111         wait_for_scb_cmd(dev);
1112         wait_for_scb_cmd_ruc(dev);
1113         writew(make16(p->rfd_first), &p->scb->rfa_offset);
1114         writeb(RUC_START, &p->scb->cmd_ruc);
1115         ni_attn586();           /* start cmd. */
1116         wait_for_scb_cmd_ruc(dev);
1117         /* wait for accept cmd. (no timeout!!) */
1118 }
1119
1120 static void ni52_timeout(struct net_device *dev)
1121 {
1122         struct priv *p = (struct priv *) dev->priv;
1123 #ifndef NO_NOPCOMMANDS
1124         if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1125                 netif_wake_queue(dev);
1126 #ifdef DEBUG
1127                 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1128                         dev->name);
1129                 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1130                         dev->name, (int)p->xmit_cmds[0]->cmd_status,
1131                         readw(&p->nop_cmds[0]->cmd_status),
1132                         readw(&p->nop_cmds[1]->cmd_status),
1133                         p->nop_point);
1134 #endif
1135                 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1136                 ni_attn586();
1137                 wait_for_scb_cmd(dev);
1138                 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1139                 writeb(CUC_START, &p->scb->cmd_cuc);
1140                 ni_attn586();
1141                 wait_for_scb_cmd(dev);
1142                 dev->trans_start = jiffies;
1143                 return 0;
1144         }
1145 #endif
1146         {
1147 #ifdef DEBUG
1148                 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1149                                 dev->name, readb(&p->scb->cus));
1150                 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1151                                 dev->name,
1152                                 readw(&p->xmit_cmds[0]->cmd_status),
1153                                 readw(&p->xmit_cmds[1]->cmd_status));
1154                 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1155                                 dev->name);
1156 #endif
1157                 ni52_close(dev);
1158                 ni52_open(dev);
1159         }
1160         dev->trans_start = jiffies;
1161 }
1162
1163 /******************************************************
1164  * send frame
1165  */
1166
1167 static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
1168 {
1169         int len, i;
1170 #ifndef NO_NOPCOMMANDS
1171         int next_nop;
1172 #endif
1173         struct priv *p = (struct priv *) dev->priv;
1174
1175         if (skb->len > XMIT_BUFF_SIZE) {
1176                 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);
1177                 return 0;
1178         }
1179
1180         netif_stop_queue(dev);
1181
1182         skb_copy_from_linear_data(skb, (char *)p->xmit_cbuffs[p->xmit_count],
1183                                                         skb->len);
1184         len = skb->len;
1185         if (len < ETH_ZLEN) {
1186                 len = ETH_ZLEN;
1187                 memset((char *)p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1188                                                         len - skb->len);
1189         }
1190
1191 #if (NUM_XMIT_BUFFS == 1)
1192 #       ifdef NO_NOPCOMMANDS
1193
1194 #ifdef DEBUG
1195         if (p->scb->cus & CU_ACTIVE) {
1196                 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1197                 printk(KERN_ERR "%s: stat: %04x %04x\n",
1198                                 dev->name, readb(&p->scb->cus),
1199                                 readw(&p->xmit_cmds[0]->cmd_status));
1200         }
1201 #endif
1202         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);;
1203         for (i = 0; i < 16; i++) {
1204                 writew(0, &p->xmit_cmds[0]->cmd_status);
1205                 wait_for_scb_cmd(dev);
1206                 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1207                         writeb(CUC_RESUME, &p->scb->cmd_cuc);
1208                 else {
1209                         writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1210                         writeb(CUC_START, &p->scb->cmd_cuc);
1211                 }
1212                 ni_attn586();
1213                 dev->trans_start = jiffies;
1214                 if (!i)
1215                         dev_kfree_skb(skb);
1216                 wait_for_scb_cmd(dev);
1217                 /* test it, because CU sometimes doesn't start immediately */
1218                 if (readb(&p->scb->cus) & CU_ACTIVE)
1219                         break;
1220                 if (readw(&p->xmit_cmds[0]->cmd_status))
1221                         break;
1222                 if (i == 15)
1223                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1224         }
1225 #       else
1226         next_nop = (p->nop_point + 1) & 0x1;
1227         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1228         writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1229         writew(make16(p->nop_cmds[next_nop]),
1230                                 &p->nop_cmds[next_nop]->cmd_link);
1231         writew(0, &p->xmit_cmds[0]->cmd_status);
1232         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1233
1234         writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1235         dev->trans_start = jiffies;
1236         p->nop_point = next_nop;
1237         dev_kfree_skb(skb);
1238 #       endif
1239 #else
1240         writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1241         next_nop = p->xmit_count + 1
1242         if (next_nop == NUM_XMIT_BUFFS)
1243                 next_nop = 0;
1244         writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1245         /* linkpointer of xmit-command already points to next nop cmd */
1246         writew(make16(p->nop_cmds[next_nop]),
1247                                 &p->nop_cmds[next_nop]->cmd_link);
1248         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1249         writew(make16(p->xmit_cmds[p->xmit_count]),
1250                                 &p->nop_cmds[p->xmit_count]->cmd_link);
1251         dev->trans_start = jiffies;
1252         p->xmit_count = next_nop;
1253         {
1254                 unsigned long flags;
1255                 spin_lock_irqsave(&p->spinlock);
1256                 if (p->xmit_count != p->xmit_last)
1257                         netif_wake_queue(dev);
1258                 spin_unlock_irqrestore(&p->spinlock);
1259         }
1260         dev_kfree_skb(skb);
1261 #endif
1262         return 0;
1263 }
1264
1265 /*******************************************
1266  * Someone wanna have the statistics
1267  */
1268
1269 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1270 {
1271         struct priv *p = (struct priv *) dev->priv;
1272         unsigned short crc, aln, rsc, ovrn;
1273
1274         /* Get error-statistics from the ni82586 */
1275         crc = readw(&p->scb->crc_errs);
1276         writew(0, &p->scb->crc_errs);
1277         aln = readw(&p->scb->aln_errs);
1278         writew(0, &p->scb->aln_errs);
1279         rsc = readw(&p->scb->rsc_errs);
1280         writew(0, &p->scb->rsc_errs);
1281         ovrn = readw(&p->scb->ovrn_errs);
1282         writew(0, &p->scb->ovrn_errs);
1283
1284         p->stats.rx_crc_errors += crc;
1285         p->stats.rx_fifo_errors += ovrn;
1286         p->stats.rx_frame_errors += aln;
1287         p->stats.rx_dropped += rsc;
1288
1289         return &p->stats;
1290 }
1291
1292 /********************************************************
1293  * Set MC list ..
1294  */
1295
1296 static void set_multicast_list(struct net_device *dev)
1297 {
1298         netif_stop_queue(dev);
1299         ni_disint();
1300         alloc586(dev);
1301         init586(dev);
1302         startrecv586(dev);
1303         ni_enaint();
1304         netif_wake_queue(dev);
1305 }
1306
1307 #ifdef MODULE
1308 static struct net_device *dev_ni52;
1309
1310 module_param(io, int, 0);
1311 module_param(irq, int, 0);
1312 module_param(memstart, long, 0);
1313 module_param(memend, long, 0);
1314 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1315 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1316 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1317 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1318
1319 int __init init_module(void)
1320 {
1321         if (io <= 0x0 || !memend || !memstart || irq < 2) {
1322                 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1323                 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1324                 return -ENODEV;
1325         }
1326         dev_ni52 = ni52_probe(-1);
1327         if (IS_ERR(dev_ni52))
1328                 return PTR_ERR(dev_ni52);
1329         return 0;
1330 }
1331
1332 void __exit cleanup_module(void)
1333 {
1334         unregister_netdev(dev_ni52);
1335         release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1336         free_netdev(dev_ni52);
1337 }
1338 #endif /* MODULE */
1339
1340 MODULE_LICENSE("GPL");
1341
1342 /*
1343  * END: linux/drivers/net/ni52.c
1344  */