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  *   run with e.g:
  13  *       insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000
  14  *
  15  * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!.
  16  *
  17  * If you find a bug, please report me:
  18  *   The kernel panic output and any kmsg from the ni52 driver
  19  *   the ni5210-driver-version and the linux-kernel version
  20  *   how many shared memory (memsize) on the netcard,
  21  *   bootprom: yes/no, base_addr, mem_start
  22  *   maybe the ni5210-card revision and the i82586 version
  23  *
  24  * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340
  25  *                mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000,
  26  *                           0xd8000,0xcc000,0xce000,0xda000,0xdc000
  27  *
  28  * sources:
  29  *   skeleton.c from Donald Becker
  30  *
  31  * I have also done a look in the following sources: (mail me if you need them)
  32  *   crynwr-packet-driver by Russ Nelson
  33  *   Garret A. Wollman's (fourth) i82586-driver for BSD
  34  *   (before getting an i82596 (yes 596 not 586) manual, the existing drivers
  35  *    helped me a lot to understand this tricky chip.)
  36  *
  37  * Known Problems:
  38  *   The internal sysbus seems to be slow. So we often lose packets because of
  39  *   overruns while receiving from a fast remote host.
  40  *   This can slow down TCP connections. Maybe the newer ni5210 cards are
  41  *   better. My experience is, that if a machine sends with more than about
  42  *   500-600K/s the fifo/sysbus overflows.
  43  *
  44  * IMPORTANT NOTE:
  45  *   On fast networks, it's a (very) good idea to have 16K shared memory. With
  46  *   8K, we can store only 4 receive frames, so it can (easily) happen that a
  47  *   remote machine 'overruns' our system.
  48  *
  49  * Known i82586/card problems (I'm sure, there are many more!):
  50  *   Running the NOP-mode, the i82586 sometimes seems to forget to report
  51  *   every xmit-interrupt until we restart the CU.
  52  *   Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit
  53  *   in the RBD-Struct which indicates an end of the RBD queue.
  54  *   Instead, the RU fetches another (randomly selected and
  55  *   usually used) RBD and begins to fill it. (Maybe, this happens only if
  56  *   the last buffer from the previous RFD fits exact into the queue and
  57  *   the next RFD can't fetch an initial RBD. Anyone knows more? )
  58  *
  59  * results from ftp performance tests with Linux 1.2.5
  60  *   send and receive about 350-400 KByte/s (peak up to 460 kbytes/s)
  61  *   sending in NOP-mode: peak performance up to 530K/s (but better don't
  62  *   run this mode)
  63  */
  64
  65 /*
  66  * 29.Sept.96: virt_to_bus changes for new memory scheme
  67  * 19.Feb.96: more Mcast changes, module support (MH)
  68  *
  69  * 18.Nov.95: Mcast changes (AC).
  70  *
  71  * 23.April.95: fixed(?) receiving problems by configuring a RFD more
  72  *              than the number of RBD's. Can maybe cause other problems.
  73  * 18.April.95: Added MODULE support (MH)
  74  * 17.April.95: MC related changes in init586() and set_multicast_list().
  75  *              removed use of 'jiffies' in init586() (MH)
  76  *
  77  * 19.Sep.94: Added Multicast support (not tested yet) (MH)
  78  *
  79  * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling.
  80  *            Now, every RFD has exact one RBD. (MH)
  81  *
  82  * 14.Sep.94: added promiscuous mode, a few cleanups (MH)
  83  *
  84  * 19.Aug.94: changed request_irq() parameter (MH)
  85  *
  86  * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)
  87  *
  88  * 19.July.94: lotsa cleanups .. (MH)
  89  *
  90  * 17.July.94: some patches ... verified to run with 1.1.29 (MH)
  91  *
  92  * 4.July.94: patches for Linux 1.1.24  (MH)
  93  *
  94  * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)
  95  *
  96  * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff,
  97  *                              too (MH)
  98  *
  99  * < 30.Sep.93: first versions
 100  */
 101
 102 static int debuglevel;  /* debug-printk 0: off 1: a few 2: more */
 103 static int automatic_resume; /* experimental .. better should be zero */
 104 static int rfdadd;      /* rfdadd=1 may be better for 8K MEM cards */
 105 static int fifo = 0x8;  /* don't change */
 106
 107 #include <linux/module.h>
 108 #include <linux/kernel.h>
 109 #include <linux/string.h>
 110 #include <linux/errno.h>
 111 #include <linux/ioport.h>
 112 #include <linux/slab.h>
 113 #include <linux/interrupt.h>
 114 #include <linux/delay.h>
 115 #include <linux/init.h>
 116 #include <linux/bitops.h>
 117 #include <asm/io.h>
 118
 119 #include <linux/netdevice.h>
 120 #include <linux/etherdevice.h>
 121 #include <linux/skbuff.h>
 122
 123 #include "ni52.h"
 124
 125 #define DRV_NAME "ni52"
 126
 127 #define DEBUG       /* debug on */
 128 #define SYSBUSVAL 1 /* 8 Bit */
 129
 130 #define ni_attn586()  { outb(0, dev->base_addr + NI52_ATTENTION); }
 131 #define ni_reset586() { outb(0, dev->base_addr + NI52_RESET); }
 132 #define ni_disint()   { outb(0, dev->base_addr + NI52_INTDIS); }
 133 #define ni_enaint()   { outb(0, dev->base_addr + NI52_INTENA); }
 134
 135 #define make32(ptr16) ((void __iomem *)(p->memtop + (short) (ptr16)))
 136 #define make24(ptr32) ((char __iomem *)(ptr32)) - p->base
 137 #define make16(ptr32) ((unsigned short) ((char __iomem *)(ptr32)\
 138                                         - p->memtop))
 139
 140 /******************* how to calculate the buffers *****************************
 141
 142   * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
 143   * --------------- in a different (more stable?) mode. Only in this mode it's
 144   *                 possible to configure the driver with 'NO_NOPCOMMANDS'
 145
 146 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
 147 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
 148 sizeof(rfd) = 24; sizeof(rbd) = 12;
 149 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
 150 sizeof(nop_cmd) = 8;
 151
 152   * if you don't know the driver, better do not change these values: */
 153
 154 #define RECV_BUFF_SIZE 1524 /* slightly oversized */
 155 #define XMIT_BUFF_SIZE 1524 /* slightly oversized */
 156 #define NUM_XMIT_BUFFS 1    /* config for both, 8K and 16K shmem */
 157 #define NUM_RECV_BUFFS_8  4 /* config for 8K shared mem */
 158 #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
 159 #define NO_NOPCOMMANDS      /* only possible with NUM_XMIT_BUFFS=1 */
 160
 161 /**************************************************************************/
 162
 163
 164 #define NI52_TOTAL_SIZE 16
 165 #define NI52_ADDR0 0x02
 166 #define NI52_ADDR1 0x07
 167 #define NI52_ADDR2 0x01
 168
 169 static int     ni52_probe1(struct net_device *dev, int ioaddr);
 170 static irqreturn_t ni52_interrupt(int irq, void *dev_id);
 171 static int     ni52_open(struct net_device *dev);
 172 static int     ni52_close(struct net_device *dev);
 173 static netdev_tx_t ni52_send_packet(struct sk_buff *, struct net_device *);
 174 static struct  net_device_stats *ni52_get_stats(struct net_device *dev);
 175 static void    set_multicast_list(struct net_device *dev);
 176 static void    ni52_timeout(struct net_device *dev);
 177
 178 /* helper-functions */
 179 static int     init586(struct net_device *dev);
 180 static int     check586(struct net_device *dev, unsigned size);
 181 static void    alloc586(struct net_device *dev);
 182 static void    startrecv586(struct net_device *dev);
 183 static void   __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr);
 184 static void    ni52_rcv_int(struct net_device *dev);
 185 static void    ni52_xmt_int(struct net_device *dev);
 186 static void    ni52_rnr_int(struct net_device *dev);
 187
 188 struct priv {
 189         struct net_device_stats stats;
 190         char __iomem *base;
 191         char __iomem *mapped;
 192         char __iomem *memtop;
 193         spinlock_t spinlock;
 194         int reset;
 195         struct rfd_struct __iomem *rfd_last, *rfd_top, *rfd_first;
 196         struct scp_struct __iomem *scp;
 197         struct iscp_struct __iomem *iscp;
 198         struct scb_struct __iomem *scb;
 199         struct tbd_struct __iomem *xmit_buffs[NUM_XMIT_BUFFS];
 200 #if (NUM_XMIT_BUFFS == 1)
 201         struct transmit_cmd_struct __iomem *xmit_cmds[2];
 202         struct nop_cmd_struct __iomem *nop_cmds[2];
 203 #else
 204         struct transmit_cmd_struct __iomem *xmit_cmds[NUM_XMIT_BUFFS];
 205         struct nop_cmd_struct __iomem *nop_cmds[NUM_XMIT_BUFFS];
 206 #endif
 207         int nop_point, num_recv_buffs;
 208         char __iomem *xmit_cbuffs[NUM_XMIT_BUFFS];
 209         int xmit_count, xmit_last;
 210 };
 211
 212 /* wait for command with timeout: */
 213 static void wait_for_scb_cmd(struct net_device *dev)
 214 {
 215         struct priv *p = netdev_priv(dev);
 216         int i;
 217         for (i = 0; i < 16384; i++) {
 218                 if (readb(&p->scb->cmd_cuc) == 0)
 219                       break;
 220                 udelay(4);
 221                 if (i == 16383) {
 222                         printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",
 223                                 dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus));
 224                         if (!p->reset) {
 225                                 p->reset = 1;
 226                                 ni_reset586();
 227                         }
 228                 }
 229         }
 230 }
 231
 232 static void wait_for_scb_cmd_ruc(struct net_device *dev)
 233 {
 234         struct priv *p = netdev_priv(dev);
 235         int i;
 236         for (i = 0; i < 16384; i++) {
 237                 if (readb(&p->scb->cmd_ruc) == 0)
 238                         break;
 239                 udelay(4);
 240                 if (i == 16383) {
 241                         printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",
 242                                 dev->name, readb(&p->scb->cmd_ruc),
 243                                 readb(&p->scb->rus));
 244                         if (!p->reset) {
 245                                 p->reset = 1;
 246                                 ni_reset586();
 247                         }
 248                 }
 249         }
 250 }
 251
 252 static void wait_for_stat_compl(void __iomem *p)
 253 {
 254         struct nop_cmd_struct __iomem *addr = p;
 255         int i;
 256         for (i = 0; i < 32767; i++) {
 257                 if (readw(&((addr)->cmd_status)) & STAT_COMPL)
 258                         break;
 259                 udelay(32);
 260         }
 261 }
 262
 263 /**********************************************
 264  * close device
 265  */
 266 static int ni52_close(struct net_device *dev)
 267 {
 268         free_irq(dev->irq, dev);
 269         ni_reset586(); /* the hard way to stop the receiver */
 270         netif_stop_queue(dev);
 271         return 0;
 272 }
 273
 274 /**********************************************
 275  * open device
 276  */
 277 static int ni52_open(struct net_device *dev)
 278 {
 279         int ret;
 280
 281         ni_disint();
 282         alloc586(dev);
 283         init586(dev);
 284         startrecv586(dev);
 285         ni_enaint();
 286
 287         ret = request_irq(dev->irq, ni52_interrupt, 0, dev->name, dev);
 288         if (ret) {
 289                 ni_reset586();
 290                 return ret;
 291         }
 292         netif_start_queue(dev);
 293         return 0; /* most done by init */
 294 }
 295
 296 static int check_iscp(struct net_device *dev, void __iomem *addr)
 297 {
 298         struct iscp_struct __iomem *iscp = addr;
 299         struct priv *p = netdev_priv(dev);
 300         memset_io(iscp, 0, sizeof(struct iscp_struct));
 301
 302         writel(make24(iscp), &p->scp->iscp);
 303         writeb(1, &iscp->busy);
 304
 305         ni_reset586();
 306         ni_attn586();
 307         mdelay(32);     /* wait a while... */
 308         /* i82586 clears 'busy' after successful init */
 309         if (readb(&iscp->busy))
 310                 return 0;
 311         return 1;
 312 }
 313
 314 /**********************************************
 315  * Check to see if there's an 82586 out there.
 316  */
 317 static int check586(struct net_device *dev, unsigned size)
 318 {
 319         struct priv *p = netdev_priv(dev);
 320         int i;
 321
 322         p->mapped = ioremap(dev->mem_start, size);
 323         if (!p->mapped)
 324                 return 0;
 325
 326         p->base = p->mapped + size - 0x01000000;
 327         p->memtop = p->mapped + size;
 328         p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
 329         p->scb  = (struct scb_struct __iomem *) p->mapped;
 330         p->iscp = (struct iscp_struct __iomem *)p->scp - 1;
 331         memset_io(p->scp, 0, sizeof(struct scp_struct));
 332         for (i = 0; i < sizeof(struct scp_struct); i++)
 333                 /* memory was writeable? */
 334                 if (readb((char __iomem *)p->scp + i))
 335                         goto Enodev;
 336         writeb(SYSBUSVAL, &p->scp->sysbus);     /* 1 = 8Bit-Bus, 0 = 16 Bit */
 337         if (readb(&p->scp->sysbus) != SYSBUSVAL)
 338                 goto Enodev;
 339
 340         if (!check_iscp(dev, p->mapped))
 341                 goto Enodev;
 342         if (!check_iscp(dev, p->iscp))
 343                 goto Enodev;
 344         return 1;
 345 Enodev:
 346         iounmap(p->mapped);
 347         return 0;
 348 }
 349
 350 /******************************************************************
 351  * set iscp at the right place, called by ni52_probe1 and open586.
 352  */
 353 static void alloc586(struct net_device *dev)
 354 {
 355         struct priv *p = netdev_priv(dev);
 356
 357         ni_reset586();
 358         mdelay(32);
 359
 360         memset_io(p->iscp, 0, sizeof(struct iscp_struct));
 361         memset_io(p->scp , 0, sizeof(struct scp_struct));
 362
 363         writel(make24(p->iscp), &p->scp->iscp);
 364         writeb(SYSBUSVAL, &p->scp->sysbus);
 365         writew(make16(p->scb), &p->iscp->scb_offset);
 366
 367         writeb(1, &p->iscp->busy);
 368         ni_reset586();
 369         ni_attn586();
 370
 371         mdelay(32);
 372
 373         if (readb(&p->iscp->busy))
 374                 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
 375
 376         p->reset = 0;
 377
 378         memset_io(p->scb, 0, sizeof(struct scb_struct));
 379 }
 380
 381 /* set: io,irq,memstart,memend or set it when calling insmod */
 382 static int irq = 9;
 383 static int io = 0x300;
 384 static long memstart;   /* e.g 0xd0000 */
 385 static long memend;     /* e.g 0xd4000 */
 386
 387 /**********************************************
 388  * probe the ni5210-card
 389  */
 390 struct net_device * __init ni52_probe(int unit)
 391 {
 392         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
 393         static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
 394         struct priv *p;
 395         int *port;
 396         int err = 0;
 397
 398         if (!dev)
 399                 return ERR_PTR(-ENOMEM);
 400
 401         p = netdev_priv(dev);
 402
 403         if (unit >= 0) {
 404                 sprintf(dev->name, "eth%d", unit);
 405                 netdev_boot_setup_check(dev);
 406                 io = dev->base_addr;
 407                 irq = dev->irq;
 408                 memstart = dev->mem_start;
 409                 memend = dev->mem_end;
 410         }
 411
 412         if (io > 0x1ff) {       /* Check a single specified location. */
 413                 err = ni52_probe1(dev, io);
 414         } else if (io > 0) {            /* Don't probe at all. */
 415                 err = -ENXIO;
 416         } else {
 417                 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
 418                         ;
 419                 if (*port)
 420                         goto got_it;
 421 #ifdef FULL_IO_PROBE
 422                 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
 423                         ;
 424                 if (io < 0x400)
 425                         goto got_it;
 426 #endif
 427                 err = -ENODEV;
 428         }
 429         if (err)
 430                 goto out;
 431 got_it:
 432         err = register_netdev(dev);
 433         if (err)
 434                 goto out1;
 435         return dev;
 436 out1:
 437         iounmap(p->mapped);
 438         release_region(dev->base_addr, NI52_TOTAL_SIZE);
 439 out:
 440         free_netdev(dev);
 441         return ERR_PTR(err);
 442 }
 443
 444 static const struct net_device_ops ni52_netdev_ops = {
 445         .ndo_open               = ni52_open,
 446         .ndo_stop               = ni52_close,
 447         .ndo_get_stats          = ni52_get_stats,
 448         .ndo_tx_timeout         = ni52_timeout,
 449         .ndo_start_xmit         = ni52_send_packet,
 450         .ndo_set_multicast_list = set_multicast_list,
 451         .ndo_change_mtu         = eth_change_mtu,
 452         .ndo_set_mac_address    = eth_mac_addr,
 453         .ndo_validate_addr      = eth_validate_addr,
 454 };
 455
 456 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
 457 {
 458         int i, size, retval;
 459         struct priv *priv = netdev_priv(dev);
 460
 461         dev->base_addr = ioaddr;
 462         dev->irq = irq;
 463         dev->mem_start = memstart;
 464         dev->mem_end = memend;
 465
 466         spin_lock_init(&priv->spinlock);
 467
 468         if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
 469                 return -EBUSY;
 470
 471         if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
 472             !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
 473                 retval = -ENODEV;
 474                 goto out;
 475         }
 476
 477         for (i = 0; i < ETH_ALEN; i++)
 478                 dev->dev_addr[i] = inb(dev->base_addr+i);
 479
 480         if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1 ||
 481             dev->dev_addr[2] != NI52_ADDR2) {
 482                 retval = -ENODEV;
 483                 goto out;
 484         }
 485
 486         printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
 487                                 dev->name, dev->base_addr);
 488
 489         /*
 490          * check (or search) IO-Memory, 8K and 16K
 491          */
 492 #ifdef MODULE
 493         size = dev->mem_end - dev->mem_start;
 494         if (size != 0x2000 && size != 0x4000) {
 495                 printk("\n");
 496                 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
 497                 retval = -ENODEV;
 498                 goto out;
 499         }
 500         if (!check586(dev, size)) {
 501                 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
 502                 retval = -ENODEV;
 503                 goto out;
 504         }
 505 #else
 506         if (dev->mem_start != 0) {
 507                 /* no auto-mem-probe */
 508                 size = 0x4000; /* check for 16K mem */
 509                 if (!check586(dev, size)) {
 510                         size = 0x2000; /* check for 8K mem */
 511                         if (!check586(dev, size)) {
 512                                 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
 513                                 retval = -ENODEV;
 514                                 goto out;
 515                         }
 516                 }
 517         } else {
 518                 static const unsigned long memaddrs[] = {
 519                         0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
 520                         0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
 521                 };
 522                 for (i = 0;; i++) {
 523                         if (!memaddrs[i]) {
 524                                 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
 525                                 retval = -ENODEV;
 526                                 goto out;
 527                         }
 528                         dev->mem_start = memaddrs[i];
 529                         size = 0x2000; /* check for 8K mem */
 530                         if (check586(dev, size))
 531                                 /* 8K-check */
 532                                 break;
 533                         size = 0x4000; /* check for 16K mem */
 534                         if (check586(dev, size))
 535                                 /* 16K-check */
 536                                 break;
 537                 }
 538         }
 539         /* set mem_end showed by 'ifconfig' */
 540         dev->mem_end = dev->mem_start + size;
 541 #endif
 542
 543         alloc586(dev);
 544
 545         /* set number of receive-buffs according to memsize */
 546         if (size == 0x2000)
 547                 priv->num_recv_buffs = NUM_RECV_BUFFS_8;
 548         else
 549                 priv->num_recv_buffs = NUM_RECV_BUFFS_16;
 550
 551         printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
 552                                 dev->mem_start, size);
 553
 554         if (dev->irq < 2) {
 555                 unsigned long irq_mask;
 556
 557                 irq_mask = probe_irq_on();
 558                 ni_reset586();
 559                 ni_attn586();
 560
 561                 mdelay(20);
 562                 dev->irq = probe_irq_off(irq_mask);
 563                 if (!dev->irq) {
 564                         printk("?autoirq, Failed to detect IRQ line!\n");
 565                         retval = -EAGAIN;
 566                         iounmap(priv->mapped);
 567                         goto out;
 568                 }
 569                 printk("IRQ %d (autodetected).\n", dev->irq);
 570         } else {
 571                 if (dev->irq == 2)
 572                         dev->irq = 9;
 573                 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
 574         }
 575
 576         dev->netdev_ops         = &ni52_netdev_ops;
 577         dev->watchdog_timeo     = HZ/20;
 578
 579         return 0;
 580 out:
 581         release_region(ioaddr, NI52_TOTAL_SIZE);
 582         return retval;
 583 }
 584
 585 /**********************************************
 586  * init the chip (ni52-interrupt should be disabled?!)
 587  * needs a correct 'allocated' memory
 588  */
 589
 590 static int init586(struct net_device *dev)
 591 {
 592         void __iomem *ptr;
 593         int i, result = 0;
 594         struct priv *p = netdev_priv(dev);
 595         struct configure_cmd_struct __iomem *cfg_cmd;
 596         struct iasetup_cmd_struct __iomem *ias_cmd;
 597         struct tdr_cmd_struct __iomem *tdr_cmd;
 598         struct mcsetup_cmd_struct __iomem *mc_cmd;
 599         struct dev_mc_list *dmi = dev->mc_list;
 600         int num_addrs = dev->mc_count;
 601
 602         ptr = p->scb + 1;
 603
 604         cfg_cmd = ptr; /* configure-command */
 605         writew(0, &cfg_cmd->cmd_status);
 606         writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
 607         writew(0xFFFF, &cfg_cmd->cmd_link);
 608
 609         /* number of cfg bytes */
 610         writeb(0x0a, &cfg_cmd->byte_cnt);
 611         /* fifo-limit (8=tx:32/rx:64) */
 612         writeb(fifo, &cfg_cmd->fifo);
 613         /* hold or discard bad recv frames (bit 7) */
 614         writeb(0x40, &cfg_cmd->sav_bf);
 615         /* addr_len |!src_insert |pre-len |loopback */
 616         writeb(0x2e, &cfg_cmd->adr_len);
 617         writeb(0x00, &cfg_cmd->priority);
 618         writeb(0x60, &cfg_cmd->ifs);
 619         writeb(0x00, &cfg_cmd->time_low);
 620         writeb(0xf2, &cfg_cmd->time_high);
 621         writeb(0x00, &cfg_cmd->promisc);
 622         if (dev->flags & IFF_ALLMULTI) {
 623                 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
 624                 if (num_addrs > len) {
 625                         printk(KERN_ERR "%s: switching to promisc. mode\n",
 626                                 dev->name);
 627                         writeb(0x01, &cfg_cmd->promisc);
 628                 }
 629         }
 630         if (dev->flags & IFF_PROMISC)
 631                 writeb(0x01, &cfg_cmd->promisc);
 632         writeb(0x00, &cfg_cmd->carr_coll);
 633         writew(make16(cfg_cmd), &p->scb->cbl_offset);
 634         writeb(0, &p->scb->cmd_ruc);
 635
 636         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 637         ni_attn586();
 638
 639         wait_for_stat_compl(cfg_cmd);
 640
 641         if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 642                                                         (STAT_COMPL|STAT_OK)) {
 643                 printk(KERN_ERR "%s: configure command failed: %x\n",
 644                                 dev->name, readw(&cfg_cmd->cmd_status));
 645                 return 1;
 646         }
 647
 648         /*
 649          * individual address setup
 650          */
 651
 652         ias_cmd = ptr;
 653
 654         writew(0, &ias_cmd->cmd_status);
 655         writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
 656         writew(0xffff, &ias_cmd->cmd_link);
 657
 658         memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
 659
 660         writew(make16(ias_cmd), &p->scb->cbl_offset);
 661
 662         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 663         ni_attn586();
 664
 665         wait_for_stat_compl(ias_cmd);
 666
 667         if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 668                                                         (STAT_OK|STAT_COMPL)) {
 669                 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
 670                 return 1;
 671         }
 672
 673         /*
 674          * TDR, wire check .. e.g. no resistor e.t.c
 675          */
 676
 677         tdr_cmd = ptr;
 678
 679         writew(0, &tdr_cmd->cmd_status);
 680         writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
 681         writew(0xffff, &tdr_cmd->cmd_link);
 682         writew(0, &tdr_cmd->status);
 683
 684         writew(make16(tdr_cmd), &p->scb->cbl_offset);
 685         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 686         ni_attn586();
 687
 688         wait_for_stat_compl(tdr_cmd);
 689
 690         if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
 691                 printk(KERN_ERR "%s: Problems while running the TDR.\n",
 692                                 dev->name);
 693         else {
 694                 udelay(16);
 695                 result = readw(&tdr_cmd->status);
 696                 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 697                 ni_attn586(); /* ack the interrupts */
 698
 699                 if (result & TDR_LNK_OK)
 700                         ;
 701                 else if (result & TDR_XCVR_PRB)
 702                         printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
 703                                 dev->name);
 704                 else if (result & TDR_ET_OPN)
 705                         printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
 706                                 dev->name, result & TDR_TIMEMASK);
 707                 else if (result & TDR_ET_SRT) {
 708                         /* time == 0 -> strange :-) */
 709                         if (result & TDR_TIMEMASK)
 710                                 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
 711                                         dev->name, result & TDR_TIMEMASK);
 712                 } else
 713                         printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
 714                                                 dev->name, result);
 715         }
 716
 717         /*
 718          * Multicast setup
 719          */
 720         if (num_addrs && !(dev->flags & IFF_PROMISC)) {
 721                 mc_cmd = ptr;
 722                 writew(0, &mc_cmd->cmd_status);
 723                 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
 724                 writew(0xffff, &mc_cmd->cmd_link);
 725                 writew(num_addrs * 6, &mc_cmd->mc_cnt);
 726
 727                 for (i = 0; i < num_addrs; i++, dmi = dmi->next)
 728                         memcpy_toio(mc_cmd->mc_list[i],
 729                                                         dmi->dmi_addr, 6);
 730
 731                 writew(make16(mc_cmd), &p->scb->cbl_offset);
 732                 writeb(CUC_START, &p->scb->cmd_cuc);
 733                 ni_attn586();
 734
 735                 wait_for_stat_compl(mc_cmd);
 736
 737                 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
 738                                                  != (STAT_COMPL|STAT_OK))
 739                         printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
 740         }
 741
 742         /*
 743          * alloc nop/xmit-cmds
 744          */
 745 #if (NUM_XMIT_BUFFS == 1)
 746         for (i = 0; i < 2; i++) {
 747                 p->nop_cmds[i] = ptr;
 748                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 749                 writew(0, &p->nop_cmds[i]->cmd_status);
 750                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 751                 ptr = ptr + sizeof(struct nop_cmd_struct);
 752         }
 753 #else
 754         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 755                 p->nop_cmds[i] = ptr;
 756                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 757                 writew(0, &p->nop_cmds[i]->cmd_status);
 758                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 759                 ptr = ptr + sizeof(struct nop_cmd_struct);
 760         }
 761 #endif
 762
 763         ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
 764
 765         /*
 766          * alloc xmit-buffs / init xmit_cmds
 767          */
 768         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 769                 /* Transmit cmd/buff 0 */
 770                 p->xmit_cmds[i] = ptr;
 771                 ptr = ptr + sizeof(struct transmit_cmd_struct);
 772                 p->xmit_cbuffs[i] = ptr; /* char-buffs */
 773                 ptr = ptr + XMIT_BUFF_SIZE;
 774                 p->xmit_buffs[i] = ptr; /* TBD */
 775                 ptr = ptr + sizeof(struct tbd_struct);
 776                 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
 777                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
 778                                 dev->name);
 779                         return 1;
 780                 }
 781                 memset_io(p->xmit_cmds[i], 0,
 782                                         sizeof(struct transmit_cmd_struct));
 783                 memset_io(p->xmit_buffs[i], 0,
 784                                         sizeof(struct tbd_struct));
 785                 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
 786                                         &p->xmit_cmds[i]->cmd_link);
 787                 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
 788                 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
 789                 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
 790                 writew(0xffff, &p->xmit_buffs[i]->next);
 791                 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
 792         }
 793
 794         p->xmit_count = 0;
 795         p->xmit_last    = 0;
 796 #ifndef NO_NOPCOMMANDS
 797         p->nop_point    = 0;
 798 #endif
 799
 800          /*
 801                 * 'start transmitter'
 802                 */
 803 #ifndef NO_NOPCOMMANDS
 804         writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
 805         writeb(CUC_START, &p->scb->cmd_cuc);
 806         ni_attn586();
 807         wait_for_scb_cmd(dev);
 808 #else
 809         writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
 810         writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
 811 #endif
 812
 813         /*
 814          * ack. interrupts
 815          */
 816         writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 817         ni_attn586();
 818         udelay(16);
 819
 820         ni_enaint();
 821
 822         return 0;
 823 }
 824
 825 /******************************************************
 826  * This is a helper routine for ni52_rnr_int() and init586().
 827  * It sets up the Receive Frame Area (RFA).
 828  */
 829
 830 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
 831 {
 832         struct rfd_struct __iomem *rfd = ptr;
 833         struct rbd_struct __iomem *rbd;
 834         int i;
 835         struct priv *p = netdev_priv(dev);
 836
 837         memset_io(rfd, 0,
 838                 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
 839         p->rfd_first = rfd;
 840
 841         for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
 842                 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
 843                         &rfd[i].next);
 844                 writew(0xffff, &rfd[i].rbd_offset);
 845         }
 846         /* RU suspend */
 847         writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
 848
 849         ptr = rfd + (p->num_recv_buffs + rfdadd);
 850
 851         rbd = ptr;
 852         ptr = rbd + p->num_recv_buffs;
 853
 854          /* clr descriptors */
 855         memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
 856
 857         for (i = 0; i < p->num_recv_buffs; i++) {
 858                 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
 859                 writew(RECV_BUFF_SIZE, &rbd[i].size);
 860                 writel(make24(ptr), &rbd[i].buffer);
 861                 ptr = ptr + RECV_BUFF_SIZE;
 862         }
 863         p->rfd_top      = p->rfd_first;
 864         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
 865
 866         writew(make16(p->rfd_first), &p->scb->rfa_offset);
 867         writew(make16(rbd), &p->rfd_first->rbd_offset);
 868
 869         return ptr;
 870 }
 871
 872
 873 /**************************************************
 874  * Interrupt Handler ...
 875  */
 876
 877 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
 878 {
 879         struct net_device *dev = dev_id;
 880         unsigned int stat;
 881         int cnt = 0;
 882         struct priv *p;
 883
 884         p = netdev_priv(dev);
 885
 886         if (debuglevel > 1)
 887                 printk("I");
 888
 889         spin_lock(&p->spinlock);
 890
 891         wait_for_scb_cmd(dev); /* wait for last command */
 892
 893         while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
 894                 writeb(stat, &p->scb->cmd_cuc);
 895                 ni_attn586();
 896
 897                 if (stat & STAT_FR)      /* received a frame */
 898                         ni52_rcv_int(dev);
 899
 900                 if (stat & STAT_RNR) { /* RU went 'not ready' */
 901                         printk("(R)");
 902                         if (readb(&p->scb->rus) & RU_SUSPEND) {
 903                                 /* special case: RU_SUSPEND */
 904                                 wait_for_scb_cmd(dev);
 905                                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
 906                                 ni_attn586();
 907                                 wait_for_scb_cmd_ruc(dev);
 908                         } else {
 909                                 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
 910                                         dev->name, stat, readb(&p->scb->rus));
 911                                 ni52_rnr_int(dev);
 912                         }
 913                 }
 914
 915                 /* Command with I-bit set complete */
 916                 if (stat & STAT_CX)
 917                          ni52_xmt_int(dev);
 918
 919 #ifndef NO_NOPCOMMANDS
 920                 if (stat & STAT_CNA) {  /* CU went 'not ready' */
 921                         if (netif_running(dev))
 922                                 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
 923                                         dev->name, stat, readb(&p->scb->cus));
 924                 }
 925 #endif
 926
 927                 if (debuglevel > 1)
 928                         printk("%d", cnt++);
 929
 930                 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
 931                 wait_for_scb_cmd(dev);
 932                 if (readb(&p->scb->cmd_cuc)) {   /* timed out? */
 933                         printk(KERN_ERR "%s: Acknowledge timed out.\n",
 934                                 dev->name);
 935                         ni_disint();
 936                         break;
 937                 }
 938         }
 939         spin_unlock(&p->spinlock);
 940
 941         if (debuglevel > 1)
 942                 printk("i");
 943         return IRQ_HANDLED;
 944 }
 945
 946 /*******************************************************
 947  * receive-interrupt
 948  */
 949
 950 static void ni52_rcv_int(struct net_device *dev)
 951 {
 952         int status, cnt = 0;
 953         unsigned short totlen;
 954         struct sk_buff *skb;
 955         struct rbd_struct __iomem *rbd;
 956         struct priv *p = netdev_priv(dev);
 957
 958         if (debuglevel > 0)
 959                 printk("R");
 960
 961         for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
 962                 rbd = make32(readw(&p->rfd_top->rbd_offset));
 963                 if (status & RFD_OK) { /* frame received without error? */
 964                         totlen = readw(&rbd->status);
 965                         if (totlen & RBD_LAST) {
 966                                 /* the first and the last buffer? */
 967                                 totlen &= RBD_MASK; /* length of this frame */
 968                                 writew(0x00, &rbd->status);
 969                                 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
 970                                 if (skb != NULL) {
 971                                         skb_reserve(skb, 2);
 972                                         skb_put(skb, totlen);
 973                                         memcpy_fromio(skb->data, p->base + readl(&rbd->buffer), totlen);
 974                                         skb->protocol = eth_type_trans(skb, dev);
 975                                         netif_rx(skb);
 976                                         p->stats.rx_packets++;
 977                                         p->stats.rx_bytes += totlen;
 978                                 } else
 979                                         p->stats.rx_dropped++;
 980                         } else {
 981                                 int rstat;
 982                                  /* free all RBD's until RBD_LAST is set */
 983                                 totlen = 0;
 984                                 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
 985                                         totlen += rstat & RBD_MASK;
 986                                         if (!rstat) {
 987                                                 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
 988                                                 break;
 989                                         }
 990                                         writew(0, &rbd->status);
 991                                         rbd = make32(readw(&rbd->next));
 992                                 }
 993                                 totlen += rstat & RBD_MASK;
 994                                 writew(0, &rbd->status);
 995                                 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
 996                                         dev->name, totlen);
 997                                 p->stats.rx_dropped++;
 998                          }
 999                 } else {/* frame !(ok), only with 'save-bad-frames' */
1000                         printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
1001                                 dev->name, status);
1002                         p->stats.rx_errors++;
1003                 }
1004                 writeb(0, &p->rfd_top->stat_high);
1005                 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
1006                 writew(0xffff, &p->rfd_top->rbd_offset);
1007                 writeb(0, &p->rfd_last->last);  /* delete RFD_SUSP      */
1008                 p->rfd_last = p->rfd_top;
1009                 p->rfd_top = make32(readw(&p->rfd_top->next)); /* step to next RFD */
1010                 writew(make16(p->rfd_top), &p->scb->rfa_offset);
1011
1012                 if (debuglevel > 0)
1013                         printk("%d", cnt++);
1014         }
1015
1016         if (automatic_resume) {
1017                 wait_for_scb_cmd(dev);
1018                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1019                 ni_attn586();
1020                 wait_for_scb_cmd_ruc(dev);
1021         }
1022
1023 #ifdef WAIT_4_BUSY
1024         {
1025                 int i;
1026                 for (i = 0; i < 1024; i++) {
1027                         if (p->rfd_top->status)
1028                                 break;
1029                         udelay(16);
1030                         if (i == 1023)
1031                                 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1032                 }
1033         }
1034 #endif
1035         if (debuglevel > 0)
1036                 printk("r");
1037 }
1038
1039 /**********************************************************
1040  * handle 'Receiver went not ready'.
1041  */
1042
1043 static void ni52_rnr_int(struct net_device *dev)
1044 {
1045         struct priv *p = netdev_priv(dev);
1046
1047         p->stats.rx_errors++;
1048
1049         wait_for_scb_cmd(dev);          /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1050         writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1051         ni_attn586();
1052         wait_for_scb_cmd_ruc(dev);              /* wait for accept cmd. */
1053
1054         alloc_rfa(dev, p->rfd_first);
1055         /* maybe add a check here, before restarting the RU */
1056         startrecv586(dev); /* restart RU */
1057
1058         printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n",
1059                 dev->name, readb(&p->scb->rus));
1060
1061 }
1062
1063 /**********************************************************
1064  * handle xmit - interrupt
1065  */
1066
1067 static void ni52_xmt_int(struct net_device *dev)
1068 {
1069         int status;
1070         struct priv *p = netdev_priv(dev);
1071
1072         if (debuglevel > 0)
1073                 printk("X");
1074
1075         status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1076         if (!(status & STAT_COMPL))
1077                 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1078
1079         if (status & STAT_OK) {
1080                 p->stats.tx_packets++;
1081                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1082         } else {
1083                 p->stats.tx_errors++;
1084                 if (status & TCMD_LATECOLL) {
1085                         printk(KERN_ERR "%s: late collision detected.\n",
1086                                 dev->name);
1087                         p->stats.collisions++;
1088                 } else if (status & TCMD_NOCARRIER) {
1089                         p->stats.tx_carrier_errors++;
1090                         printk(KERN_ERR "%s: no carrier detected.\n",
1091                                 dev->name);
1092                 } else if (status & TCMD_LOSTCTS)
1093                         printk(KERN_ERR "%s: loss of CTS detected.\n",
1094                                 dev->name);
1095                 else if (status & TCMD_UNDERRUN) {
1096                         p->stats.tx_fifo_errors++;
1097                         printk(KERN_ERR "%s: DMA underrun detected.\n",
1098                                 dev->name);
1099                 } else if (status & TCMD_MAXCOLL) {
1100                         printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1101                                 dev->name);
1102                         p->stats.collisions += 16;
1103                 }
1104         }
1105 #if (NUM_XMIT_BUFFS > 1)
1106         if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1107                 p->xmit_last = 0;
1108 #endif
1109         netif_wake_queue(dev);
1110 }
1111
1112 /***********************************************************
1113  * (re)start the receiver
1114  */
1115
1116 static void startrecv586(struct net_device *dev)
1117 {
1118         struct priv *p = netdev_priv(dev);
1119
1120         wait_for_scb_cmd(dev);
1121         wait_for_scb_cmd_ruc(dev);
1122         writew(make16(p->rfd_first), &p->scb->rfa_offset);
1123         writeb(RUC_START, &p->scb->cmd_ruc);
1124         ni_attn586();           /* start cmd. */
1125         wait_for_scb_cmd_ruc(dev);
1126         /* wait for accept cmd. (no timeout!!) */
1127 }
1128
1129 static void ni52_timeout(struct net_device *dev)
1130 {
1131         struct priv *p = netdev_priv(dev);
1132 #ifndef NO_NOPCOMMANDS
1133         if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1134                 netif_wake_queue(dev);
1135 #ifdef DEBUG
1136                 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1137                         dev->name);
1138                 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1139                         dev->name, (int)p->xmit_cmds[0]->cmd_status,
1140                         readw(&p->nop_cmds[0]->cmd_status),
1141                         readw(&p->nop_cmds[1]->cmd_status),
1142                         p->nop_point);
1143 #endif
1144                 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1145                 ni_attn586();
1146                 wait_for_scb_cmd(dev);
1147                 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1148                 writeb(CUC_START, &p->scb->cmd_cuc);
1149                 ni_attn586();
1150                 wait_for_scb_cmd(dev);
1151                 dev->trans_start = jiffies;
1152                 return 0;
1153         }
1154 #endif
1155         {
1156 #ifdef DEBUG
1157                 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1158                                 dev->name, readb(&p->scb->cus));
1159                 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1160                                 dev->name,
1161                                 readw(&p->xmit_cmds[0]->cmd_status),
1162                                 readw(&p->xmit_cmds[1]->cmd_status));
1163                 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1164                                 dev->name);
1165 #endif
1166                 ni52_close(dev);
1167                 ni52_open(dev);
1168         }
1169         dev->trans_start = jiffies;
1170 }
1171
1172 /******************************************************
1173  * send frame
1174  */
1175
1176 static netdev_tx_t ni52_send_packet(struct sk_buff *skb,
1177                                     struct net_device *dev)
1178 {
1179         int len, i;
1180 #ifndef NO_NOPCOMMANDS
1181         int next_nop;
1182 #endif
1183         struct priv *p = netdev_priv(dev);
1184
1185         if (skb->len > XMIT_BUFF_SIZE) {
1186                 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);
1187                 return NETDEV_TX_OK;
1188         }
1189
1190         netif_stop_queue(dev);
1191
1192         memcpy_toio(p->xmit_cbuffs[p->xmit_count], skb->data, skb->len);
1193         len = skb->len;
1194         if (len < ETH_ZLEN) {
1195                 len = ETH_ZLEN;
1196                 memset_io(p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1197                                                         len - skb->len);
1198         }
1199
1200 #if (NUM_XMIT_BUFFS == 1)
1201 #       ifdef NO_NOPCOMMANDS
1202
1203 #ifdef DEBUG
1204         if (readb(&p->scb->cus) & CU_ACTIVE) {
1205                 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1206                 printk(KERN_ERR "%s: stat: %04x %04x\n",
1207                                 dev->name, readb(&p->scb->cus),
1208                                 readw(&p->xmit_cmds[0]->cmd_status));
1209         }
1210 #endif
1211         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1212         for (i = 0; i < 16; i++) {
1213                 writew(0, &p->xmit_cmds[0]->cmd_status);
1214                 wait_for_scb_cmd(dev);
1215                 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1216                         writeb(CUC_RESUME, &p->scb->cmd_cuc);
1217                 else {
1218                         writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1219                         writeb(CUC_START, &p->scb->cmd_cuc);
1220                 }
1221                 ni_attn586();
1222                 dev->trans_start = jiffies;
1223                 if (!i)
1224                         dev_kfree_skb(skb);
1225                 wait_for_scb_cmd(dev);
1226                 /* test it, because CU sometimes doesn't start immediately */
1227                 if (readb(&p->scb->cus) & CU_ACTIVE)
1228                         break;
1229                 if (readw(&p->xmit_cmds[0]->cmd_status))
1230                         break;
1231                 if (i == 15)
1232                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1233         }
1234 #       else
1235         next_nop = (p->nop_point + 1) & 0x1;
1236         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1237         writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1238         writew(make16(p->nop_cmds[next_nop]),
1239                                 &p->nop_cmds[next_nop]->cmd_link);
1240         writew(0, &p->xmit_cmds[0]->cmd_status);
1241         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1242
1243         writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1244         dev->trans_start = jiffies;
1245         p->nop_point = next_nop;
1246         dev_kfree_skb(skb);
1247 #       endif
1248 #else
1249         writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1250         next_nop = p->xmit_count + 1
1251         if (next_nop == NUM_XMIT_BUFFS)
1252                 next_nop = 0;
1253         writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1254         /* linkpointer of xmit-command already points to next nop cmd */
1255         writew(make16(p->nop_cmds[next_nop]),
1256                                 &p->nop_cmds[next_nop]->cmd_link);
1257         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1258         writew(make16(p->xmit_cmds[p->xmit_count]),
1259                                 &p->nop_cmds[p->xmit_count]->cmd_link);
1260         dev->trans_start = jiffies;
1261         p->xmit_count = next_nop;
1262         {
1263                 unsigned long flags;
1264                 spin_lock_irqsave(&p->spinlock);
1265                 if (p->xmit_count != p->xmit_last)
1266                         netif_wake_queue(dev);
1267                 spin_unlock_irqrestore(&p->spinlock);
1268         }
1269         dev_kfree_skb(skb);
1270 #endif
1271         return NETDEV_TX_OK;
1272 }
1273
1274 /*******************************************
1275  * Someone wanna have the statistics
1276  */
1277
1278 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1279 {
1280         struct priv *p = netdev_priv(dev);
1281         unsigned short crc, aln, rsc, ovrn;
1282
1283         /* Get error-statistics from the ni82586 */
1284         crc = readw(&p->scb->crc_errs);
1285         writew(0, &p->scb->crc_errs);
1286         aln = readw(&p->scb->aln_errs);
1287         writew(0, &p->scb->aln_errs);
1288         rsc = readw(&p->scb->rsc_errs);
1289         writew(0, &p->scb->rsc_errs);
1290         ovrn = readw(&p->scb->ovrn_errs);
1291         writew(0, &p->scb->ovrn_errs);
1292
1293         p->stats.rx_crc_errors += crc;
1294         p->stats.rx_fifo_errors += ovrn;
1295         p->stats.rx_frame_errors += aln;
1296         p->stats.rx_dropped += rsc;
1297
1298         return &p->stats;
1299 }
1300
1301 /********************************************************
1302  * Set MC list ..
1303  */
1304
1305 static void set_multicast_list(struct net_device *dev)
1306 {
1307         netif_stop_queue(dev);
1308         ni_disint();
1309         alloc586(dev);
1310         init586(dev);
1311         startrecv586(dev);
1312         ni_enaint();
1313         netif_wake_queue(dev);
1314 }
1315
1316 #ifdef MODULE
1317 static struct net_device *dev_ni52;
1318
1319 module_param(io, int, 0);
1320 module_param(irq, int, 0);
1321 module_param(memstart, long, 0);
1322 module_param(memend, long, 0);
1323 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1324 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1325 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1326 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1327
1328 int __init init_module(void)
1329 {
1330         if (io <= 0x0 || !memend || !memstart || irq < 2) {
1331                 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1332                 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1333                 return -ENODEV;
1334         }
1335         dev_ni52 = ni52_probe(-1);
1336         if (IS_ERR(dev_ni52))
1337                 return PTR_ERR(dev_ni52);
1338         return 0;
1339 }
1340
1341 void __exit cleanup_module(void)
1342 {
1343         struct priv *p = netdev_priv(dev_ni52);
1344         unregister_netdev(dev_ni52);
1345         iounmap(p->mapped);
1346         release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1347         free_netdev(dev_ni52);
1348 }
1349 #endif /* MODULE */
1350
1351 MODULE_LICENSE("GPL");