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) ((void __iomem *)(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, readb(&p->scb->cmd_ruc),
 245                                 readb(&p->scb->rus));
 246                         if (!p->reset) {
 247                                 p->reset = 1;
 248                                 ni_reset586();
 249                         }
 250                 }
 251         }
 252 }
 253
 254 static void wait_for_stat_compl(void __iomem *p)
 255 {
 256         struct nop_cmd_struct __iomem *addr = p;
 257         int i;
 258         for (i = 0; i < 32767; i++) {
 259                 if (readw(&((addr)->cmd_status)) & STAT_COMPL)
 260                         break;
 261                 udelay(32);
 262         }
 263 }
 264
 265 /**********************************************
 266  * close device
 267  */
 268 static int ni52_close(struct net_device *dev)
 269 {
 270         free_irq(dev->irq, dev);
 271         ni_reset586(); /* the hard way to stop the receiver */
 272         netif_stop_queue(dev);
 273         return 0;
 274 }
 275
 276 /**********************************************
 277  * open device
 278  */
 279 static int ni52_open(struct net_device *dev)
 280 {
 281         int ret;
 282
 283         ni_disint();
 284         alloc586(dev);
 285         init586(dev);
 286         startrecv586(dev);
 287         ni_enaint();
 288
 289         ret = request_irq(dev->irq, &ni52_interrupt, 0, dev->name, dev);
 290         if (ret) {
 291                 ni_reset586();
 292                 return ret;
 293         }
 294         netif_start_queue(dev);
 295         return 0; /* most done by init */
 296 }
 297
 298 static int check_iscp(struct net_device *dev, void __iomem *addr)
 299 {
 300         struct iscp_struct __iomem *iscp = addr;
 301         struct priv *p = dev->priv;
 302         memset_io(iscp, 0, sizeof(struct iscp_struct));
 303
 304         writel(make24(iscp), &p->scp->iscp);
 305         writeb(1, &iscp->busy);
 306
 307         ni_reset586();
 308         ni_attn586();
 309         mdelay(32);     /* wait a while... */
 310         /* i82586 clears 'busy' after successful init */
 311         if (readb(&iscp->busy))
 312                 return 0;
 313         return 1;
 314 }
 315
 316 /**********************************************
 317  * Check to see if there's an 82586 out there.
 318  */
 319 static int check586(struct net_device *dev, unsigned size)
 320 {
 321         struct priv *p = dev->priv;
 322         int i;
 323
 324         p->mapped = ioremap(dev->mem_start, size);
 325         if (!p->mapped)
 326                 return 0;
 327
 328         p->base = p->mapped + size - 0x01000000;
 329         p->memtop = p->mapped + size;
 330         p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
 331         p->scb  = (struct scb_struct __iomem *) p->mapped;
 332         p->iscp = (struct iscp_struct __iomem *)p->scp - 1;
 333         memset_io(p->scp, 0, sizeof(struct scp_struct));
 334         for (i = 0; i < sizeof(struct scp_struct); i++)
 335                 /* memory was writeable? */
 336                 if (readb((char __iomem *)p->scp + i))
 337                         goto Enodev;
 338         writeb(SYSBUSVAL, &p->scp->sysbus);     /* 1 = 8Bit-Bus, 0 = 16 Bit */
 339         if (readb(&p->scp->sysbus) != SYSBUSVAL)
 340                 goto Enodev;
 341
 342         if (!check_iscp(dev, p->mapped))
 343                 goto Enodev;
 344         if (!check_iscp(dev, p->iscp))
 345                 goto Enodev;
 346         return 1;
 347 Enodev:
 348         iounmap(p->mapped);
 349         return 0;
 350 }
 351
 352 /******************************************************************
 353  * set iscp at the right place, called by ni52_probe1 and open586.
 354  */
 355 static void alloc586(struct net_device *dev)
 356 {
 357         struct priv *p =        (struct priv *) dev->priv;
 358
 359         ni_reset586();
 360         mdelay(32);
 361
 362         memset_io(p->iscp, 0, sizeof(struct iscp_struct));
 363         memset_io(p->scp , 0, sizeof(struct scp_struct));
 364
 365         writel(make24(p->iscp), &p->scp->iscp);
 366         writeb(SYSBUSVAL, &p->scp->sysbus);
 367         writew(make16(p->scb), &p->iscp->scb_offset);
 368
 369         writeb(1, &p->iscp->busy);
 370         ni_reset586();
 371         ni_attn586();
 372
 373         mdelay(32);
 374
 375         if (readb(&p->iscp->busy))
 376                 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
 377
 378         p->reset = 0;
 379
 380         memset_io(p->scb, 0, sizeof(struct scb_struct));
 381 }
 382
 383 /* set: io,irq,memstart,memend or set it when calling insmod */
 384 static int irq = 9;
 385 static int io = 0x300;
 386 static long memstart;   /* e.g 0xd0000 */
 387 static long memend;     /* e.g 0xd4000 */
 388
 389 /**********************************************
 390  * probe the ni5210-card
 391  */
 392 struct net_device * __init ni52_probe(int unit)
 393 {
 394         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
 395         static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
 396         struct priv *p;
 397         int *port;
 398         int err = 0;
 399
 400         if (!dev)
 401                 return ERR_PTR(-ENOMEM);
 402
 403         p = dev->priv;
 404
 405         if (unit >= 0) {
 406                 sprintf(dev->name, "eth%d", unit);
 407                 netdev_boot_setup_check(dev);
 408                 io = dev->base_addr;
 409                 irq = dev->irq;
 410                 memstart = dev->mem_start;
 411                 memend = dev->mem_end;
 412         }
 413
 414         if (io > 0x1ff) {       /* Check a single specified location. */
 415                 err = ni52_probe1(dev, io);
 416         } else if (io > 0) {            /* Don't probe at all. */
 417                 err = -ENXIO;
 418         } else {
 419                 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
 420                         ;
 421                 if (*port)
 422                         goto got_it;
 423 #ifdef FULL_IO_PROBE
 424                 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
 425                         ;
 426                 if (io < 0x400)
 427                         goto got_it;
 428 #endif
 429                 err = -ENODEV;
 430         }
 431         if (err)
 432                 goto out;
 433 got_it:
 434         err = register_netdev(dev);
 435         if (err)
 436                 goto out1;
 437         return dev;
 438 out1:
 439         iounmap(p->mapped);
 440         release_region(dev->base_addr, NI52_TOTAL_SIZE);
 441 out:
 442         free_netdev(dev);
 443         return ERR_PTR(err);
 444 }
 445
 446 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
 447 {
 448         int i, size, retval;
 449         struct priv *priv = dev->priv;
 450
 451         dev->base_addr = ioaddr;
 452         dev->irq = irq;
 453         dev->mem_start = memstart;
 454         dev->mem_end = memend;
 455
 456         spin_lock_init(&priv->spinlock);
 457
 458         if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
 459                 return -EBUSY;
 460
 461         if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
 462             !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
 463                 retval = -ENODEV;
 464                 goto out;
 465         }
 466
 467         for (i = 0; i < ETH_ALEN; i++)
 468                 dev->dev_addr[i] = inb(dev->base_addr+i);
 469
 470         if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
 471                  || dev->dev_addr[2] != NI52_ADDR2) {
 472                 retval = -ENODEV;
 473                 goto out;
 474         }
 475
 476         printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
 477                                 dev->name, dev->base_addr);
 478
 479         /*
 480          * check (or search) IO-Memory, 8K and 16K
 481          */
 482 #ifdef MODULE
 483         size = dev->mem_end - dev->mem_start;
 484         if (size != 0x2000 && size != 0x4000) {
 485                 printk("\n");
 486                 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
 487                 retval = -ENODEV;
 488                 goto out;
 489         }
 490         if (!check586(dev, size)) {
 491                 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
 492                 retval = -ENODEV;
 493                 goto out;
 494         }
 495 #else
 496         if (dev->mem_start != 0) {
 497                 /* no auto-mem-probe */
 498                 size = 0x4000; /* check for 16K mem */
 499                 if (!check586(dev, size)) {
 500                         size = 0x2000; /* check for 8K mem */
 501                         if (!check586(dev, size)) {
 502                                 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
 503                                 retval = -ENODEV;
 504                                 goto out;
 505                         }
 506                 }
 507         } else {
 508                 static const unsigned long memaddrs[] = {
 509                         0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
 510                         0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
 511                 };
 512                 for (i = 0;; i++) {
 513                         if (!memaddrs[i]) {
 514                                 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
 515                                 retval = -ENODEV;
 516                                 goto out;
 517                         }
 518                         dev->mem_start = memaddrs[i];
 519                         size = 0x2000; /* check for 8K mem */
 520                         if (check586(dev, size))
 521                                 /* 8K-check */
 522                                 break;
 523                         size = 0x4000; /* check for 16K mem */
 524                         if (check586(dev, size))
 525                                 /* 16K-check */
 526                                 break;
 527                 }
 528         }
 529         /* set mem_end showed by 'ifconfig' */
 530         dev->mem_end = dev->mem_start + size;
 531 #endif
 532
 533         alloc586(dev);
 534
 535         /* set number of receive-buffs according to memsize */
 536         if (size == 0x2000)
 537                 priv->num_recv_buffs = NUM_RECV_BUFFS_8;
 538         else
 539                 priv->num_recv_buffs = NUM_RECV_BUFFS_16;
 540
 541         printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
 542                                 dev->mem_start, size);
 543
 544         if (dev->irq < 2) {
 545                 unsigned long irq_mask;
 546
 547                 irq_mask = probe_irq_on();
 548                 ni_reset586();
 549                 ni_attn586();
 550
 551                 mdelay(20);
 552                 dev->irq = probe_irq_off(irq_mask);
 553                 if (!dev->irq) {
 554                         printk("?autoirq, Failed to detect IRQ line!\n");
 555                         retval = -EAGAIN;
 556                         iounmap(priv->mapped);
 557                         goto out;
 558                 }
 559                 printk("IRQ %d (autodetected).\n", dev->irq);
 560         } else {
 561                 if (dev->irq == 2)
 562                         dev->irq = 9;
 563                 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
 564         }
 565
 566         dev->open               = ni52_open;
 567         dev->stop               = ni52_close;
 568         dev->get_stats          = ni52_get_stats;
 569         dev->tx_timeout         = ni52_timeout;
 570         dev->watchdog_timeo     = HZ/20;
 571         dev->hard_start_xmit    = ni52_send_packet;
 572         dev->set_multicast_list = set_multicast_list;
 573
 574         dev->if_port            = 0;
 575
 576         return 0;
 577 out:
 578         release_region(ioaddr, NI52_TOTAL_SIZE);
 579         return retval;
 580 }
 581
 582 /**********************************************
 583  * init the chip (ni52-interrupt should be disabled?!)
 584  * needs a correct 'allocated' memory
 585  */
 586
 587 static int init586(struct net_device *dev)
 588 {
 589         void __iomem *ptr;
 590         int i, result = 0;
 591         struct priv *p = (struct priv *)dev->priv;
 592         struct configure_cmd_struct __iomem *cfg_cmd;
 593         struct iasetup_cmd_struct __iomem *ias_cmd;
 594         struct tdr_cmd_struct __iomem *tdr_cmd;
 595         struct mcsetup_cmd_struct __iomem *mc_cmd;
 596         struct dev_mc_list *dmi = dev->mc_list;
 597         int num_addrs = dev->mc_count;
 598
 599         ptr = p->scb + 1;
 600
 601         cfg_cmd = ptr; /* configure-command */
 602         writew(0, &cfg_cmd->cmd_status);
 603         writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
 604         writew(0xFFFF, &cfg_cmd->cmd_link);
 605
 606         /* number of cfg bytes */
 607         writeb(0x0a, &cfg_cmd->byte_cnt);
 608         /* fifo-limit (8=tx:32/rx:64) */
 609         writeb(fifo, &cfg_cmd->fifo);
 610         /* hold or discard bad recv frames (bit 7) */
 611         writeb(0x40, &cfg_cmd->sav_bf);
 612         /* addr_len |!src_insert |pre-len |loopback */
 613         writeb(0x2e, &cfg_cmd->adr_len);
 614         writeb(0x00, &cfg_cmd->priority);
 615         writeb(0x60, &cfg_cmd->ifs);;
 616         writeb(0x00, &cfg_cmd->time_low);
 617         writeb(0xf2, &cfg_cmd->time_high);
 618         writeb(0x00, &cfg_cmd->promisc);;
 619         if (dev->flags & IFF_ALLMULTI) {
 620                 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
 621                 if (num_addrs > len) {
 622                         printk(KERN_ERR "%s: switching to promisc. mode\n",
 623                                 dev->name);
 624                         dev->flags |= IFF_PROMISC;
 625                 }
 626         }
 627         if (dev->flags & IFF_PROMISC)
 628                 writeb(0x01, &cfg_cmd->promisc);
 629         writeb(0x00, &cfg_cmd->carr_coll);
 630         writew(make16(cfg_cmd), &p->scb->cbl_offset);
 631         writeb(0, &p->scb->cmd_ruc);
 632
 633         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 634         ni_attn586();
 635
 636         wait_for_stat_compl(cfg_cmd);
 637
 638         if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 639                                                         (STAT_COMPL|STAT_OK)) {
 640                 printk(KERN_ERR "%s: configure command failed: %x\n",
 641                                 dev->name, readw(&cfg_cmd->cmd_status));
 642                 return 1;
 643         }
 644
 645         /*
 646          * individual address setup
 647          */
 648
 649         ias_cmd = ptr;
 650
 651         writew(0, &ias_cmd->cmd_status);
 652         writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
 653         writew(0xffff, &ias_cmd->cmd_link);
 654
 655         memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
 656
 657         writew(make16(ias_cmd), &p->scb->cbl_offset);
 658
 659         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 660         ni_attn586();
 661
 662         wait_for_stat_compl(ias_cmd);
 663
 664         if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 665                                                         (STAT_OK|STAT_COMPL)) {
 666                 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
 667                 return 1;
 668         }
 669
 670         /*
 671          * TDR, wire check .. e.g. no resistor e.t.c
 672          */
 673
 674         tdr_cmd = ptr;
 675
 676         writew(0, &tdr_cmd->cmd_status);
 677         writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
 678         writew(0xffff, &tdr_cmd->cmd_link);
 679         writew(0, &tdr_cmd->status);
 680
 681         writew(make16(tdr_cmd), &p->scb->cbl_offset);
 682         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 683         ni_attn586();
 684
 685         wait_for_stat_compl(tdr_cmd);
 686
 687         if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
 688                 printk(KERN_ERR "%s: Problems while running the TDR.\n",
 689                                 dev->name);
 690         else {
 691                 udelay(16);
 692                 result = readw(&tdr_cmd->status);
 693                 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 694                 ni_attn586(); /* ack the interrupts */
 695
 696                 if (result & TDR_LNK_OK)
 697                         ;
 698                 else if (result & TDR_XCVR_PRB)
 699                         printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
 700                                 dev->name);
 701                 else if (result & TDR_ET_OPN)
 702                         printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
 703                                 dev->name, result & TDR_TIMEMASK);
 704                 else if (result & TDR_ET_SRT) {
 705                         /* time == 0 -> strange :-) */
 706                         if (result & TDR_TIMEMASK)
 707                                 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
 708                                         dev->name, result & TDR_TIMEMASK);
 709                 } else
 710                         printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
 711                                                 dev->name, result);
 712         }
 713
 714         /*
 715          * Multicast setup
 716          */
 717         if (num_addrs && !(dev->flags & IFF_PROMISC)) {
 718                 mc_cmd = ptr;
 719                 writew(0, &mc_cmd->cmd_status);
 720                 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
 721                 writew(0xffff, &mc_cmd->cmd_link);
 722                 writew(num_addrs * 6, &mc_cmd->mc_cnt);
 723
 724                 for (i = 0; i < num_addrs; i++, dmi = dmi->next)
 725                         memcpy_toio(mc_cmd->mc_list[i],
 726                                                         dmi->dmi_addr, 6);
 727
 728                 writew(make16(mc_cmd), &p->scb->cbl_offset);
 729                 writeb(CUC_START, &p->scb->cmd_cuc);
 730                 ni_attn586();
 731
 732                 wait_for_stat_compl(mc_cmd);
 733
 734                 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
 735                                                  != (STAT_COMPL|STAT_OK))
 736                         printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
 737         }
 738
 739         /*
 740          * alloc nop/xmit-cmds
 741          */
 742 #if (NUM_XMIT_BUFFS == 1)
 743         for (i = 0; i < 2; i++) {
 744                 p->nop_cmds[i] = ptr;
 745                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 746                 writew(0, &p->nop_cmds[i]->cmd_status);
 747                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 748                 ptr = ptr + sizeof(struct nop_cmd_struct);
 749         }
 750 #else
 751         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 752                 p->nop_cmds[i] = ptr;
 753                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 754                 writew(0, &p->nop_cmds[i]->cmd_status);
 755                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 756                 ptr = ptr + sizeof(struct nop_cmd_struct);
 757         }
 758 #endif
 759
 760         ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
 761
 762         /*
 763          * alloc xmit-buffs / init xmit_cmds
 764          */
 765         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 766                 /* Transmit cmd/buff 0 */
 767                 p->xmit_cmds[i] = ptr;
 768                 ptr = ptr + sizeof(struct transmit_cmd_struct);
 769                 p->xmit_cbuffs[i] = ptr; /* char-buffs */
 770                 ptr = ptr + XMIT_BUFF_SIZE;
 771                 p->xmit_buffs[i] = ptr; /* TBD */
 772                 ptr = ptr + sizeof(struct tbd_struct);
 773                 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
 774                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
 775                                 dev->name);
 776                         return 1;
 777                 }
 778                 memset_io(p->xmit_cmds[i], 0,
 779                                         sizeof(struct transmit_cmd_struct));
 780                 memset_io(p->xmit_buffs[i], 0,
 781                                         sizeof(struct tbd_struct));
 782                 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
 783                                         &p->xmit_cmds[i]->cmd_link);
 784                 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
 785                 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
 786                 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
 787                 writew(0xffff, &p->xmit_buffs[i]->next);
 788                 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
 789         }
 790
 791         p->xmit_count = 0;
 792         p->xmit_last    = 0;
 793 #ifndef NO_NOPCOMMANDS
 794         p->nop_point    = 0;
 795 #endif
 796
 797          /*
 798                 * 'start transmitter'
 799                 */
 800 #ifndef NO_NOPCOMMANDS
 801         writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
 802         writeb(CUC_START, &p->scb->cmd_cuc);
 803         ni_attn586();
 804         wait_for_scb_cmd(dev);
 805 #else
 806         writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
 807         writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
 808 #endif
 809
 810         /*
 811          * ack. interrupts
 812          */
 813         writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 814         ni_attn586();
 815         udelay(16);
 816
 817         ni_enaint();
 818
 819         return 0;
 820 }
 821
 822 /******************************************************
 823  * This is a helper routine for ni52_rnr_int() and init586().
 824  * It sets up the Receive Frame Area (RFA).
 825  */
 826
 827 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
 828 {
 829         struct rfd_struct __iomem *rfd = ptr;
 830         struct rbd_struct __iomem *rbd;
 831         int i;
 832         struct priv *p = (struct priv *) dev->priv;
 833
 834         memset_io(rfd, 0,
 835                 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
 836         p->rfd_first = rfd;
 837
 838         for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
 839                 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
 840                         &rfd[i].next);
 841                 writew(0xffff, &rfd[i].rbd_offset);
 842         }
 843         /* RU suspend */
 844         writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
 845
 846         ptr = rfd + (p->num_recv_buffs + rfdadd);
 847
 848         rbd = ptr;
 849         ptr = rbd + p->num_recv_buffs;
 850
 851          /* clr descriptors */
 852         memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
 853
 854         for (i = 0; i < p->num_recv_buffs; i++) {
 855                 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
 856                 writew(RECV_BUFF_SIZE, &rbd[i].size);
 857                 writel(make24(ptr), &rbd[i].buffer);
 858                 ptr = ptr + RECV_BUFF_SIZE;
 859         }
 860         p->rfd_top      = p->rfd_first;
 861         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
 862
 863         writew(make16(p->rfd_first), &p->scb->rfa_offset);
 864         writew(make16(rbd), &p->rfd_first->rbd_offset);
 865
 866         return ptr;
 867 }
 868
 869
 870 /**************************************************
 871  * Interrupt Handler ...
 872  */
 873
 874 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
 875 {
 876         struct net_device *dev = dev_id;
 877         unsigned int stat;
 878         int cnt = 0;
 879         struct priv *p;
 880
 881         p = (struct priv *) dev->priv;
 882
 883         if (debuglevel > 1)
 884                 printk("I");
 885
 886         spin_lock(&p->spinlock);
 887
 888         wait_for_scb_cmd(dev); /* wait for last command */
 889
 890         while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
 891                 writeb(stat, &p->scb->cmd_cuc);
 892                 ni_attn586();
 893
 894                 if (stat & STAT_FR)      /* received a frame */
 895                         ni52_rcv_int(dev);
 896
 897                 if (stat & STAT_RNR) { /* RU went 'not ready' */
 898                         printk("(R)");
 899                         if (readb(&p->scb->rus) & RU_SUSPEND) {
 900                                 /* special case: RU_SUSPEND */
 901                                 wait_for_scb_cmd(dev);
 902                                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
 903                                 ni_attn586();
 904                                 wait_for_scb_cmd_ruc(dev);
 905                         } else {
 906                                 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
 907                                         dev->name, stat, readb(&p->scb->rus));
 908                                 ni52_rnr_int(dev);
 909                         }
 910                 }
 911
 912                 /* Command with I-bit set complete */
 913                 if (stat & STAT_CX)
 914                          ni52_xmt_int(dev);
 915
 916 #ifndef NO_NOPCOMMANDS
 917                 if (stat & STAT_CNA) {  /* CU went 'not ready' */
 918                         if (netif_running(dev))
 919                                 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
 920                                         dev->name, stat, readb(&p->scb->cus));
 921                 }
 922 #endif
 923
 924                 if (debuglevel > 1)
 925                         printk("%d", cnt++);
 926
 927                 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
 928                 wait_for_scb_cmd(dev);
 929                 if (readb(&p->scb->cmd_cuc)) {   /* timed out? */
 930                         printk(KERN_ERR "%s: Acknowledge timed out.\n",
 931                                 dev->name);
 932                         ni_disint();
 933                         break;
 934                 }
 935         }
 936         spin_unlock(&p->spinlock);
 937
 938         if (debuglevel > 1)
 939                 printk("i");
 940         return IRQ_HANDLED;
 941 }
 942
 943 /*******************************************************
 944  * receive-interrupt
 945  */
 946
 947 static void ni52_rcv_int(struct net_device *dev)
 948 {
 949         int status, cnt = 0;
 950         unsigned short totlen;
 951         struct sk_buff *skb;
 952         struct rbd_struct __iomem *rbd;
 953         struct priv *p = (struct priv *)dev->priv;
 954
 955         if (debuglevel > 0)
 956                 printk("R");
 957
 958         for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
 959                 rbd = make32(readw(&p->rfd_top->rbd_offset));
 960                 if (status & RFD_OK) { /* frame received without error? */
 961                         totlen = readw(&rbd->status);
 962                         if (totlen & RBD_LAST) {
 963                                 /* the first and the last buffer? */
 964                                 totlen &= RBD_MASK; /* length of this frame */
 965                                 writew(0x00, &rbd->status);
 966                                 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
 967                                 if (skb != NULL) {
 968                                         skb_reserve(skb, 2);
 969                                         skb_put(skb, totlen);
 970                                         memcpy_fromio(skb->data, p->base + readl(&rbd->buffer), totlen);
 971                                         skb->protocol = eth_type_trans(skb, dev);
 972                                         netif_rx(skb);
 973                                         dev->last_rx = jiffies;
 974                                         p->stats.rx_packets++;
 975                                         p->stats.rx_bytes += totlen;
 976                                 } else
 977                                         p->stats.rx_dropped++;
 978                         } else {
 979                                 int rstat;
 980                                  /* free all RBD's until RBD_LAST is set */
 981                                 totlen = 0;
 982                                 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
 983                                         totlen += rstat & RBD_MASK;
 984                                         if (!rstat) {
 985                                                 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
 986                                                 break;
 987                                         }
 988                                         writew(0, &rbd->status);
 989                                         rbd = make32(readw(&rbd->next));
 990                                 }
 991                                 totlen += rstat & RBD_MASK;
 992                                 writew(0, &rbd->status);
 993                                 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
 994                                         dev->name, totlen);
 995                                 p->stats.rx_dropped++;
 996                          }
 997                 } else {/* frame !(ok), only with 'save-bad-frames' */
 998                         printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
 999                                 dev->name, status);
1000                         p->stats.rx_errors++;
1001                 }
1002                 writeb(0, &p->rfd_top->stat_high);
1003                 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
1004                 writew(0xffff, &p->rfd_top->rbd_offset);
1005                 writeb(0, &p->rfd_last->last);  /* delete RFD_SUSP      */
1006                 p->rfd_last = p->rfd_top;
1007                 p->rfd_top = make32(readw(&p->rfd_top->next)); /* step to next RFD */
1008                 writew(make16(p->rfd_top), &p->scb->rfa_offset);
1009
1010                 if (debuglevel > 0)
1011                         printk("%d", cnt++);
1012         }
1013
1014         if (automatic_resume) {
1015                 wait_for_scb_cmd(dev);
1016                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1017                 ni_attn586();
1018                 wait_for_scb_cmd_ruc(dev);
1019         }
1020
1021 #ifdef WAIT_4_BUSY
1022         {
1023                 int i;
1024                 for (i = 0; i < 1024; i++) {
1025                         if (p->rfd_top->status)
1026                                 break;
1027                         udelay(16);
1028                         if (i == 1023)
1029                                 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1030                 }
1031         }
1032 #endif
1033         if (debuglevel > 0)
1034                 printk("r");
1035 }
1036
1037 /**********************************************************
1038  * handle 'Receiver went not ready'.
1039  */
1040
1041 static void ni52_rnr_int(struct net_device *dev)
1042 {
1043         struct priv *p = (struct priv *) dev->priv;
1044
1045         p->stats.rx_errors++;
1046
1047         wait_for_scb_cmd(dev);          /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1048         writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1049         ni_attn586();
1050         wait_for_scb_cmd_ruc(dev);              /* wait for accept cmd. */
1051
1052         alloc_rfa(dev, p->rfd_first);
1053         /* maybe add a check here, before restarting the RU */
1054         startrecv586(dev); /* restart RU */
1055
1056         printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n",
1057                 dev->name, readb(&p->scb->rus));
1058
1059 }
1060
1061 /**********************************************************
1062  * handle xmit - interrupt
1063  */
1064
1065 static void ni52_xmt_int(struct net_device *dev)
1066 {
1067         int status;
1068         struct priv *p = (struct priv *) dev->priv;
1069
1070         if (debuglevel > 0)
1071                 printk("X");
1072
1073         status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1074         if (!(status & STAT_COMPL))
1075                 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1076
1077         if (status & STAT_OK) {
1078                 p->stats.tx_packets++;
1079                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1080         } else {
1081                 p->stats.tx_errors++;
1082                 if (status & TCMD_LATECOLL) {
1083                         printk(KERN_ERR "%s: late collision detected.\n",
1084                                 dev->name);
1085                         p->stats.collisions++;
1086                 } else if (status & TCMD_NOCARRIER) {
1087                         p->stats.tx_carrier_errors++;
1088                         printk(KERN_ERR "%s: no carrier detected.\n",
1089                                 dev->name);
1090                 } else if (status & TCMD_LOSTCTS)
1091                         printk(KERN_ERR "%s: loss of CTS detected.\n",
1092                                 dev->name);
1093                 else if (status & TCMD_UNDERRUN) {
1094                         p->stats.tx_fifo_errors++;
1095                         printk(KERN_ERR "%s: DMA underrun detected.\n",
1096                                 dev->name);
1097                 } else if (status & TCMD_MAXCOLL) {
1098                         printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1099                                 dev->name);
1100                         p->stats.collisions += 16;
1101                 }
1102         }
1103 #if (NUM_XMIT_BUFFS > 1)
1104         if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1105                 p->xmit_last = 0;
1106 #endif
1107         netif_wake_queue(dev);
1108 }
1109
1110 /***********************************************************
1111  * (re)start the receiver
1112  */
1113
1114 static void startrecv586(struct net_device *dev)
1115 {
1116         struct priv *p = (struct priv *) dev->priv;
1117
1118         wait_for_scb_cmd(dev);
1119         wait_for_scb_cmd_ruc(dev);
1120         writew(make16(p->rfd_first), &p->scb->rfa_offset);
1121         writeb(RUC_START, &p->scb->cmd_ruc);
1122         ni_attn586();           /* start cmd. */
1123         wait_for_scb_cmd_ruc(dev);
1124         /* wait for accept cmd. (no timeout!!) */
1125 }
1126
1127 static void ni52_timeout(struct net_device *dev)
1128 {
1129         struct priv *p = (struct priv *) dev->priv;
1130 #ifndef NO_NOPCOMMANDS
1131         if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1132                 netif_wake_queue(dev);
1133 #ifdef DEBUG
1134                 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1135                         dev->name);
1136                 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1137                         dev->name, (int)p->xmit_cmds[0]->cmd_status,
1138                         readw(&p->nop_cmds[0]->cmd_status),
1139                         readw(&p->nop_cmds[1]->cmd_status),
1140                         p->nop_point);
1141 #endif
1142                 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1143                 ni_attn586();
1144                 wait_for_scb_cmd(dev);
1145                 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1146                 writeb(CUC_START, &p->scb->cmd_cuc);
1147                 ni_attn586();
1148                 wait_for_scb_cmd(dev);
1149                 dev->trans_start = jiffies;
1150                 return 0;
1151         }
1152 #endif
1153         {
1154 #ifdef DEBUG
1155                 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1156                                 dev->name, readb(&p->scb->cus));
1157                 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1158                                 dev->name,
1159                                 readw(&p->xmit_cmds[0]->cmd_status),
1160                                 readw(&p->xmit_cmds[1]->cmd_status));
1161                 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1162                                 dev->name);
1163 #endif
1164                 ni52_close(dev);
1165                 ni52_open(dev);
1166         }
1167         dev->trans_start = jiffies;
1168 }
1169
1170 /******************************************************
1171  * send frame
1172  */
1173
1174 static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
1175 {
1176         int len, i;
1177 #ifndef NO_NOPCOMMANDS
1178         int next_nop;
1179 #endif
1180         struct priv *p = (struct priv *) dev->priv;
1181
1182         if (skb->len > XMIT_BUFF_SIZE) {
1183                 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);
1184                 return 0;
1185         }
1186
1187         netif_stop_queue(dev);
1188
1189         memcpy_toio(p->xmit_cbuffs[p->xmit_count], skb->data, skb->len);
1190         len = skb->len;
1191         if (len < ETH_ZLEN) {
1192                 len = ETH_ZLEN;
1193                 memset_io(p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1194                                                         len - skb->len);
1195         }
1196
1197 #if (NUM_XMIT_BUFFS == 1)
1198 #       ifdef NO_NOPCOMMANDS
1199
1200 #ifdef DEBUG
1201         if (readb(&p->scb->cus) & CU_ACTIVE) {
1202                 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1203                 printk(KERN_ERR "%s: stat: %04x %04x\n",
1204                                 dev->name, readb(&p->scb->cus),
1205                                 readw(&p->xmit_cmds[0]->cmd_status));
1206         }
1207 #endif
1208         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1209         for (i = 0; i < 16; i++) {
1210                 writew(0, &p->xmit_cmds[0]->cmd_status);
1211                 wait_for_scb_cmd(dev);
1212                 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1213                         writeb(CUC_RESUME, &p->scb->cmd_cuc);
1214                 else {
1215                         writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1216                         writeb(CUC_START, &p->scb->cmd_cuc);
1217                 }
1218                 ni_attn586();
1219                 dev->trans_start = jiffies;
1220                 if (!i)
1221                         dev_kfree_skb(skb);
1222                 wait_for_scb_cmd(dev);
1223                 /* test it, because CU sometimes doesn't start immediately */
1224                 if (readb(&p->scb->cus) & CU_ACTIVE)
1225                         break;
1226                 if (readw(&p->xmit_cmds[0]->cmd_status))
1227                         break;
1228                 if (i == 15)
1229                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1230         }
1231 #       else
1232         next_nop = (p->nop_point + 1) & 0x1;
1233         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1234         writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1235         writew(make16(p->nop_cmds[next_nop]),
1236                                 &p->nop_cmds[next_nop]->cmd_link);
1237         writew(0, &p->xmit_cmds[0]->cmd_status);
1238         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1239
1240         writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1241         dev->trans_start = jiffies;
1242         p->nop_point = next_nop;
1243         dev_kfree_skb(skb);
1244 #       endif
1245 #else
1246         writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1247         next_nop = p->xmit_count + 1
1248         if (next_nop == NUM_XMIT_BUFFS)
1249                 next_nop = 0;
1250         writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1251         /* linkpointer of xmit-command already points to next nop cmd */
1252         writew(make16(p->nop_cmds[next_nop]),
1253                                 &p->nop_cmds[next_nop]->cmd_link);
1254         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1255         writew(make16(p->xmit_cmds[p->xmit_count]),
1256                                 &p->nop_cmds[p->xmit_count]->cmd_link);
1257         dev->trans_start = jiffies;
1258         p->xmit_count = next_nop;
1259         {
1260                 unsigned long flags;
1261                 spin_lock_irqsave(&p->spinlock);
1262                 if (p->xmit_count != p->xmit_last)
1263                         netif_wake_queue(dev);
1264                 spin_unlock_irqrestore(&p->spinlock);
1265         }
1266         dev_kfree_skb(skb);
1267 #endif
1268         return 0;
1269 }
1270
1271 /*******************************************
1272  * Someone wanna have the statistics
1273  */
1274
1275 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1276 {
1277         struct priv *p = (struct priv *) dev->priv;
1278         unsigned short crc, aln, rsc, ovrn;
1279
1280         /* Get error-statistics from the ni82586 */
1281         crc = readw(&p->scb->crc_errs);
1282         writew(0, &p->scb->crc_errs);
1283         aln = readw(&p->scb->aln_errs);
1284         writew(0, &p->scb->aln_errs);
1285         rsc = readw(&p->scb->rsc_errs);
1286         writew(0, &p->scb->rsc_errs);
1287         ovrn = readw(&p->scb->ovrn_errs);
1288         writew(0, &p->scb->ovrn_errs);
1289
1290         p->stats.rx_crc_errors += crc;
1291         p->stats.rx_fifo_errors += ovrn;
1292         p->stats.rx_frame_errors += aln;
1293         p->stats.rx_dropped += rsc;
1294
1295         return &p->stats;
1296 }
1297
1298 /********************************************************
1299  * Set MC list ..
1300  */
1301
1302 static void set_multicast_list(struct net_device *dev)
1303 {
1304         netif_stop_queue(dev);
1305         ni_disint();
1306         alloc586(dev);
1307         init586(dev);
1308         startrecv586(dev);
1309         ni_enaint();
1310         netif_wake_queue(dev);
1311 }
1312
1313 #ifdef MODULE
1314 static struct net_device *dev_ni52;
1315
1316 module_param(io, int, 0);
1317 module_param(irq, int, 0);
1318 module_param(memstart, long, 0);
1319 module_param(memend, long, 0);
1320 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1321 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1322 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1323 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1324
1325 int __init init_module(void)
1326 {
1327         if (io <= 0x0 || !memend || !memstart || irq < 2) {
1328                 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1329                 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1330                 return -ENODEV;
1331         }
1332         dev_ni52 = ni52_probe(-1);
1333         if (IS_ERR(dev_ni52))
1334                 return PTR_ERR(dev_ni52);
1335         return 0;
1336 }
1337
1338 void __exit cleanup_module(void)
1339 {
1340         struct priv *p = dev_ni52->priv;
1341         unregister_netdev(dev_ni52);
1342         iounmap(p->mapped);
1343         release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1344         free_netdev(dev_ni52);
1345 }
1346 #endif /* MODULE */
1347
1348 MODULE_LICENSE("GPL");
1349
1350 /*
1351  * END: linux/drivers/net/ni52.c
1352  */