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