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 helped
  37  *    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 better.
  43  *   my experience is, that if a machine sends with more then about 500-600K/s
  44  *   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 remote
  49  *   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 run this mode)
  64  */
  65
  66 /*
  67  * 29.Sept.96: virt_to_bus changes for new memory scheme
  68  * 19.Feb.96: more Mcast changes, module support (MH)
  69  *
  70  * 18.Nov.95: Mcast changes (AC).
  71  *
  72  * 23.April.95: fixed(?) receiving problems by configuring a RFD more
  73  *              than the number of RBD's. Can maybe cause other problems.
  74  * 18.April.95: Added MODULE support (MH)
  75  * 17.April.95: MC related changes in init586() and set_multicast_list().
  76  *              removed use of 'jiffies' in init586() (MH)
  77  *
  78  * 19.Sep.94: Added Multicast support (not tested yet) (MH)
  79  *
  80  * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling.
  81  *            Now, every RFD has exact one RBD. (MH)
  82  *
  83  * 14.Sep.94: added promiscuous mode, a few cleanups (MH)
  84  *
  85  * 19.Aug.94: changed request_irq() parameter (MH)
  86  *
  87  * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)
  88  *
  89  * 19.July.94: lotsa cleanups .. (MH)
  90  *
  91  * 17.July.94: some patches ... verified to run with 1.1.29 (MH)
  92  *
  93  * 4.July.94: patches for Linux 1.1.24  (MH)
  94  *
  95  * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)
  96  *
  97  * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff, 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 /* #define REALLY_SLOW_IO */
 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 <asm/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 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) (p->memtop + (short) (ptr16) )
 136 #define make24(ptr32) ( ((char *) (ptr32)) - p->base)
 137 #define make16(ptr32) ((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop ))
 138
 139 /******************* how to calculate the buffers *****************************
 140
 141   * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
 142   * --------------- in a different (more stable?) mode. Only in this mode it's
 143   *                 possible to configure the driver with 'NO_NOPCOMMANDS'
 144
 145 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
 146 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
 147 sizeof(rfd) = 24; sizeof(rbd) = 12;
 148 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
 149 sizeof(nop_cmd) = 8;
 150
 151   * if you don't know the driver, better do not change these values: */
 152
 153 #define RECV_BUFF_SIZE 1524 /* slightly oversized */
 154 #define XMIT_BUFF_SIZE 1524 /* slightly oversized */
 155 #define NUM_XMIT_BUFFS 1    /* config for both, 8K and 16K shmem */
 156 #define NUM_RECV_BUFFS_8  4 /* config for 8K shared mem */
 157 #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
 158 #define NO_NOPCOMMANDS      /* only possible with NUM_XMIT_BUFFS=1 */
 159
 160 /**************************************************************************/
 161
 162 /* different DELAYs */
 163 #define DELAY(x) mdelay(32 * x);
 164 #define DELAY_16(); { udelay(16); }
 165 #define DELAY_18(); { udelay(4); }
 166
 167 /* wait for command with timeout: */
 168 #define WAIT_4_SCB_CMD() \
 169 { int i; \
 170   for(i=0;i<16384;i++) { \
 171     if(!p->scb->cmd_cuc) break; \
 172     DELAY_18(); \
 173     if(i == 16383) { \
 174       printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \
 175        if(!p->reseted) { p->reseted = 1; ni_reset586(); } } } }
 176
 177 #define WAIT_4_SCB_CMD_RUC() { int i; \
 178   for(i=0;i<16384;i++) { \
 179     if(!p->scb->cmd_ruc) break; \
 180     DELAY_18(); \
 181     if(i == 16383) { \
 182       printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \
 183        if(!p->reseted) { p->reseted = 1; ni_reset586(); } } } }
 184
 185 #define WAIT_4_STAT_COMPL(addr) { int i; \
 186    for(i=0;i<32767;i++) { \
 187      if((addr)->cmd_status & STAT_COMPL) break; \
 188      DELAY_16(); DELAY_16(); } }
 189
 190 #define NI52_TOTAL_SIZE 16
 191 #define NI52_ADDR0 0x02
 192 #define NI52_ADDR1 0x07
 193 #define NI52_ADDR2 0x01
 194
 195 static int     ni52_probe1(struct net_device *dev,int ioaddr);
 196 static void    ni52_interrupt(int irq,void *dev_id,struct pt_regs *reg_ptr);
 197 static int     ni52_open(struct net_device *dev);
 198 static int     ni52_close(struct net_device *dev);
 199 static int     ni52_send_packet(struct sk_buff *,struct net_device *);
 200 static struct  net_device_stats *ni52_get_stats(struct net_device *dev);
 201 static void    set_multicast_list(struct net_device *dev);
 202 static void    ni52_timeout(struct net_device *dev);
 203 #if 0
 204 static void    ni52_dump(struct net_device *,void *);
 205 #endif
 206
 207 /* helper-functions */
 208 static int     init586(struct net_device *dev);
 209 static int     check586(struct net_device *dev,char *where,unsigned size);
 210 static void    alloc586(struct net_device *dev);
 211 static void    startrecv586(struct net_device *dev);
 212 static void   *alloc_rfa(struct net_device *dev,void *ptr);
 213 static void    ni52_rcv_int(struct net_device *dev);
 214 static void    ni52_xmt_int(struct net_device *dev);
 215 static void    ni52_rnr_int(struct net_device *dev);
 216
 217 struct priv
 218 {
 219         struct net_device_stats stats;
 220         unsigned long base;
 221         char *memtop;
 222         long int lock;
 223         int reseted;
 224         volatile struct rfd_struct      *rfd_last,*rfd_top,*rfd_first;
 225         volatile struct scp_struct      *scp;   /* volatile is important */
 226         volatile struct iscp_struct     *iscp;  /* volatile is important */
 227         volatile struct scb_struct      *scb;   /* volatile is important */
 228         volatile struct tbd_struct      *xmit_buffs[NUM_XMIT_BUFFS];
 229 #if (NUM_XMIT_BUFFS == 1)
 230         volatile struct transmit_cmd_struct *xmit_cmds[2];
 231         volatile struct nop_cmd_struct *nop_cmds[2];
 232 #else
 233         volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
 234         volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
 235 #endif
 236         volatile int            nop_point,num_recv_buffs;
 237         volatile char           *xmit_cbuffs[NUM_XMIT_BUFFS];
 238         volatile int            xmit_count,xmit_last;
 239 };
 240
 241 /**********************************************
 242  * close device
 243  */
 244 static int ni52_close(struct net_device *dev)
 245 {
 246         free_irq(dev->irq, dev);
 247
 248         ni_reset586(); /* the hard way to stop the receiver */
 249
 250         netif_stop_queue(dev);
 251
 252         return 0;
 253 }
 254
 255 /**********************************************
 256  * open device
 257  */
 258 static int ni52_open(struct net_device *dev)
 259 {
 260         int ret;
 261
 262         ni_disint();
 263         alloc586(dev);
 264         init586(dev);
 265         startrecv586(dev);
 266         ni_enaint();
 267
 268         ret = request_irq(dev->irq, &ni52_interrupt,0,dev->name,dev);
 269         if (ret)
 270         {
 271                 ni_reset586();
 272                 return ret;
 273         }
 274
 275         netif_start_queue(dev);
 276
 277         return 0; /* most done by init */
 278 }
 279
 280 /**********************************************
 281  * Check to see if there's an 82586 out there.
 282  */
 283 static int check586(struct net_device *dev,char *where,unsigned size)
 284 {
 285         struct priv pb;
 286         struct priv *p = /* (struct priv *) dev->priv*/ &pb;
 287         char *iscp_addrs[2];
 288         int i;
 289
 290         p->base = (unsigned long) bus_to_virt((unsigned long)where) + size - 0x01000000;
 291         p->memtop = bus_to_virt((unsigned long)where) + size;
 292         p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
 293         memset((char *)p->scp,0, sizeof(struct scp_struct));
 294         for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */
 295                 if(((char *)p->scp)[i])
 296                         return 0;
 297         p->scp->sysbus = SYSBUSVAL;                             /* 1 = 8Bit-Bus, 0 = 16 Bit */
 298         if(p->scp->sysbus != SYSBUSVAL)
 299                 return 0;
 300
 301         iscp_addrs[0] = bus_to_virt((unsigned long)where);
 302         iscp_addrs[1]= (char *) p->scp - sizeof(struct iscp_struct);
 303
 304         for(i=0;i<2;i++)
 305         {
 306                 p->iscp = (struct iscp_struct *) iscp_addrs[i];
 307                 memset((char *)p->iscp,0, sizeof(struct iscp_struct));
 308
 309                 p->scp->iscp = make24(p->iscp);
 310                 p->iscp->busy = 1;
 311
 312                 ni_reset586();
 313                 ni_attn586();
 314                 DELAY(1);       /* wait a while... */
 315
 316                 if(p->iscp->busy) /* i82586 clears 'busy' after successful init */
 317                         return 0;
 318         }
 319         return 1;
 320 }
 321
 322 /******************************************************************
 323  * set iscp at the right place, called by ni52_probe1 and open586.
 324  */
 325 static void alloc586(struct net_device *dev)
 326 {
 327         struct priv *p =        (struct priv *) dev->priv;
 328
 329         ni_reset586();
 330         DELAY(1);
 331
 332         p->scp  = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
 333         p->scb  = (struct scb_struct *) bus_to_virt(dev->mem_start);
 334         p->iscp = (struct iscp_struct *) ((char *)p->scp - sizeof(struct iscp_struct));
 335
 336         memset((char *) p->iscp,0,sizeof(struct iscp_struct));
 337         memset((char *) p->scp ,0,sizeof(struct scp_struct));
 338
 339         p->scp->iscp = make24(p->iscp);
 340         p->scp->sysbus = SYSBUSVAL;
 341         p->iscp->scb_offset = make16(p->scb);
 342
 343         p->iscp->busy = 1;
 344         ni_reset586();
 345         ni_attn586();
 346
 347         DELAY(1);
 348
 349         if(p->iscp->busy)
 350                 printk("%s: Init-Problems (alloc).\n",dev->name);
 351
 352         p->reseted = 0;
 353
 354         memset((char *)p->scb,0,sizeof(struct scb_struct));
 355 }
 356
 357 /**********************************************
 358  * probe the ni5210-card
 359  */
 360 int __init ni52_probe(struct net_device *dev)
 361 {
 362 #ifndef MODULE
 363         int *port;
 364         static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
 365 #endif
 366         int base_addr = dev->base_addr;
 367
 368         SET_MODULE_OWNER(dev);
 369
 370         if (base_addr > 0x1ff)          /* Check a single specified location. */
 371                 return ni52_probe1(dev, base_addr);
 372         else if (base_addr > 0)         /* Don't probe at all. */
 373                 return -ENXIO;
 374
 375 #ifdef MODULE
 376         printk("%s: no autoprobing allowed for modules.\n",dev->name);
 377 #else
 378         for (port = ports; *port; port++) {
 379                 int ioaddr = *port;
 380                 dev->base_addr = ioaddr;
 381                 if (ni52_probe1(dev, ioaddr) == 0)
 382                         return 0;
 383         }
 384
 385 #ifdef FULL_IO_PROBE
 386         for(dev->base_addr=0x200; dev->base_addr<0x400; dev->base_addr+=8)
 387                 if (ni52_probe1(dev, dev->base_addr) == 0)
 388                         return 0;
 389 #endif
 390
 391 #endif
 392
 393         dev->base_addr = base_addr;
 394         return -ENODEV;
 395 }
 396
 397 static int __init ni52_probe1(struct net_device *dev,int ioaddr)
 398 {
 399         int i, size, retval;
 400
 401         if (!request_region(ioaddr, NI52_TOTAL_SIZE, dev->name))
 402                 return -EBUSY;
 403
 404         if( !(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
 405             !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
 406                 retval = -ENODEV;
 407                 goto out;
 408         }
 409
 410         for(i=0;i<ETH_ALEN;i++)
 411                 dev->dev_addr[i] = inb(dev->base_addr+i);
 412
 413         if(dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
 414                  || dev->dev_addr[2] != NI52_ADDR2) {
 415                 retval = -ENODEV;
 416                 goto out;
 417         }
 418
 419         printk("%s: NI5210 found at %#3lx, ",dev->name,dev->base_addr);
 420
 421         /*
 422          * check (or search) IO-Memory, 8K and 16K
 423          */
 424 #ifdef MODULE
 425         size = dev->mem_end - dev->mem_start;
 426         if(size != 0x2000 && size != 0x4000) {
 427                 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n",dev->name,size);
 428                 retval = -ENODEV;
 429                 goto out;
 430         }
 431         if(!check586(dev,(char *) dev->mem_start,size)) {
 432                 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
 433                 retval = -ENODEV;
 434                 goto out;
 435         }
 436 #else
 437         if(dev->mem_start != 0) /* no auto-mem-probe */
 438         {
 439                 size = 0x4000; /* check for 16K mem */
 440                 if(!check586(dev,(char *) dev->mem_start,size)) {
 441                         size = 0x2000; /* check for 8K mem */
 442                         if(!check586(dev,(char *) dev->mem_start,size)) {
 443                                 printk("?memprobe, Can't find memory at 0x%lx!\n",dev->mem_start);
 444                                 retval = -ENODEV;
 445                                 goto out;
 446                         }
 447                 }
 448         }
 449         else
 450         {
 451                 static long memaddrs[] = { 0xc8000,0xca000,0xcc000,0xce000,0xd0000,0xd2000,
 452                                         0xd4000,0xd6000,0xd8000,0xda000,0xdc000, 0 };
 453                 for(i=0;;i++)
 454                 {
 455                         if(!memaddrs[i]) {
 456                                 printk("?memprobe, Can't find io-memory!\n");
 457                                 retval = -ENODEV;
 458                                 goto out;
 459                         }
 460                         dev->mem_start = memaddrs[i];
 461                         size = 0x2000; /* check for 8K mem */
 462                         if(check586(dev,(char *)dev->mem_start,size)) /* 8K-check */
 463                                 break;
 464                         size = 0x4000; /* check for 16K mem */
 465                         if(check586(dev,(char *)dev->mem_start,size)) /* 16K-check */
 466                                 break;
 467                 }
 468         }
 469         dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */
 470 #endif
 471
 472         dev->priv = (void *) kmalloc(sizeof(struct priv),GFP_KERNEL);
 473         if(dev->priv == NULL) {
 474                 printk("%s: Ooops .. can't allocate private driver memory.\n",dev->name);
 475                 retval = -ENOMEM;
 476                 goto out;
 477         }
 478                                                                                                                                         /* warning: we don't free it on errors */
 479         memset((char *) dev->priv,0,sizeof(struct priv));
 480
 481         ((struct priv *) (dev->priv))->memtop = bus_to_virt(dev->mem_start) + size;
 482         ((struct priv *) (dev->priv))->base =   (unsigned long) bus_to_virt(dev->mem_start) + size - 0x01000000;
 483         alloc586(dev);
 484
 485         /* set number of receive-buffs according to memsize */
 486         if(size == 0x2000)
 487                 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_8;
 488         else
 489                 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_16;
 490
 491         printk("Memaddr: 0x%lx, Memsize: %d, ",dev->mem_start,size);
 492
 493         if(dev->irq < 2)
 494         {
 495                 autoirq_setup(0);
 496                 ni_reset586();
 497                 ni_attn586();
 498                 if(!(dev->irq = autoirq_report(2)))
 499                 {
 500                         printk("?autoirq, Failed to detect IRQ line!\n");
 501                         kfree(dev->priv);
 502                         dev->priv = NULL;
 503                         retval = -EAGAIN;
 504                         goto out;
 505                 }
 506                 printk("IRQ %d (autodetected).\n",dev->irq);
 507         }
 508         else    {
 509                 if(dev->irq == 2)
 510                         dev->irq = 9;
 511                 printk("IRQ %d (assigned and not checked!).\n",dev->irq);
 512         }
 513
 514         dev->open               = ni52_open;
 515         dev->stop               = ni52_close;
 516         dev->get_stats          = ni52_get_stats;
 517         dev->tx_timeout         = ni52_timeout;
 518         dev->watchdog_timeo     = HZ/20;
 519         dev->hard_start_xmit    = ni52_send_packet;
 520         dev->set_multicast_list = set_multicast_list;
 521
 522         dev->if_port            = 0;
 523
 524         ether_setup(dev);
 525
 526         return 0;
 527 out:
 528         release_region(ioaddr, NI52_TOTAL_SIZE);
 529         return retval;
 530 }
 531
 532 /**********************************************
 533  * init the chip (ni52-interrupt should be disabled?!)
 534  * needs a correct 'allocated' memory
 535  */
 536
 537 static int init586(struct net_device *dev)
 538 {
 539         void *ptr;
 540         int i,result=0;
 541         struct priv *p = (struct priv *) dev->priv;
 542         volatile struct configure_cmd_struct    *cfg_cmd;
 543         volatile struct iasetup_cmd_struct *ias_cmd;
 544         volatile struct tdr_cmd_struct *tdr_cmd;
 545         volatile struct mcsetup_cmd_struct *mc_cmd;
 546         struct dev_mc_list *dmi=dev->mc_list;
 547         int num_addrs=dev->mc_count;
 548
 549         ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
 550
 551         cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
 552         cfg_cmd->cmd_status     = 0;
 553         cfg_cmd->cmd_cmd        = CMD_CONFIGURE | CMD_LAST;
 554         cfg_cmd->cmd_link       = 0xffff;
 555
 556         cfg_cmd->byte_cnt       = 0x0a; /* number of cfg bytes */
 557         cfg_cmd->fifo           = fifo; /* fifo-limit (8=tx:32/rx:64) */
 558         cfg_cmd->sav_bf         = 0x40; /* hold or discard bad recv frames (bit 7) */
 559         cfg_cmd->adr_len        = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
 560         cfg_cmd->priority       = 0x00;
 561         cfg_cmd->ifs            = 0x60;
 562         cfg_cmd->time_low       = 0x00;
 563         cfg_cmd->time_high      = 0xf2;
 564         cfg_cmd->promisc        = 0;
 565         if(dev->flags & IFF_ALLMULTI) {
 566                 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
 567                 if(num_addrs > len)     {
 568                         printk("%s: switching to promisc. mode\n",dev->name);
 569                         dev->flags|=IFF_PROMISC;
 570                 }
 571         }
 572         if(dev->flags&IFF_PROMISC)
 573         {
 574                          cfg_cmd->promisc=1;
 575                          dev->flags|=IFF_PROMISC;
 576         }
 577         cfg_cmd->carr_coll      = 0x00;
 578
 579         p->scb->cbl_offset      = make16(cfg_cmd);
 580         p->scb->cmd_ruc         = 0;
 581
 582         p->scb->cmd_cuc         = CUC_START; /* cmd.-unit start */
 583         ni_attn586();
 584
 585         WAIT_4_STAT_COMPL(cfg_cmd);
 586
 587         if((cfg_cmd->cmd_status & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))
 588         {
 589                 printk("%s: configure command failed: %x\n",dev->name,cfg_cmd->cmd_status);
 590                 return 1;
 591         }
 592
 593         /*
 594          * individual address setup
 595          */
 596
 597         ias_cmd = (struct iasetup_cmd_struct *)ptr;
 598
 599         ias_cmd->cmd_status     = 0;
 600         ias_cmd->cmd_cmd        = CMD_IASETUP | CMD_LAST;
 601         ias_cmd->cmd_link       = 0xffff;
 602
 603         memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN);
 604
 605         p->scb->cbl_offset = make16(ias_cmd);
 606
 607         p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
 608         ni_attn586();
 609
 610         WAIT_4_STAT_COMPL(ias_cmd);
 611
 612         if((ias_cmd->cmd_status & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {
 613                 printk("%s (ni52): individual address setup command failed: %04x\n",dev->name,ias_cmd->cmd_status);
 614                 return 1;
 615         }
 616
 617         /*
 618          * TDR, wire check .. e.g. no resistor e.t.c
 619          */
 620
 621         tdr_cmd = (struct tdr_cmd_struct *)ptr;
 622
 623         tdr_cmd->cmd_status     = 0;
 624         tdr_cmd->cmd_cmd        = CMD_TDR | CMD_LAST;
 625         tdr_cmd->cmd_link       = 0xffff;
 626         tdr_cmd->status         = 0;
 627
 628         p->scb->cbl_offset = make16(tdr_cmd);
 629         p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
 630         ni_attn586();
 631
 632         WAIT_4_STAT_COMPL(tdr_cmd);
 633
 634         if(!(tdr_cmd->cmd_status & STAT_COMPL))
 635         {
 636                 printk("%s: Problems while running the TDR.\n",dev->name);
 637         }
 638         else
 639         {
 640                 DELAY_16(); /* wait for result */
 641                 result = tdr_cmd->status;
 642
 643                 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
 644                 ni_attn586(); /* ack the interrupts */
 645
 646                 if(result & TDR_LNK_OK)
 647                         ;
 648                 else if(result & TDR_XCVR_PRB)
 649                         printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);
 650                 else if(result & TDR_ET_OPN)
 651                         printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
 652                 else if(result & TDR_ET_SRT)
 653                 {
 654                         if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
 655                                 printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
 656                 }
 657                 else
 658                         printk("%s: TDR: Unknown status %04x\n",dev->name,result);
 659         }
 660
 661         /*
 662          * Multicast setup
 663          */
 664         if(num_addrs && !(dev->flags & IFF_PROMISC) )
 665         {
 666                 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
 667                 mc_cmd->cmd_status = 0;
 668                 mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
 669                 mc_cmd->cmd_link = 0xffff;
 670                 mc_cmd->mc_cnt = num_addrs * 6;
 671
 672                 for(i=0;i<num_addrs;i++,dmi=dmi->next)
 673                         memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr,6);
 674
 675                 p->scb->cbl_offset = make16(mc_cmd);
 676                 p->scb->cmd_cuc = CUC_START;
 677                 ni_attn586();
 678
 679                 WAIT_4_STAT_COMPL(mc_cmd);
 680
 681                 if( (mc_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
 682                         printk("%s: Can't apply multicast-address-list.\n",dev->name);
 683         }
 684
 685         /*
 686          * alloc nop/xmit-cmds
 687          */
 688 #if (NUM_XMIT_BUFFS == 1)
 689         for(i=0;i<2;i++)
 690         {
 691                 p->nop_cmds[i]                  = (struct nop_cmd_struct *)ptr;
 692                 p->nop_cmds[i]->cmd_cmd         = CMD_NOP;
 693                 p->nop_cmds[i]->cmd_status      = 0;
 694                 p->nop_cmds[i]->cmd_link        = make16((p->nop_cmds[i]));
 695                 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 696         }
 697 #else
 698         for(i=0;i<NUM_XMIT_BUFFS;i++)
 699         {
 700                 p->nop_cmds[i]                  = (struct nop_cmd_struct *)ptr;
 701                 p->nop_cmds[i]->cmd_cmd         = CMD_NOP;
 702                 p->nop_cmds[i]->cmd_status      = 0;
 703                 p->nop_cmds[i]->cmd_link        = make16((p->nop_cmds[i]));
 704                 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 705         }
 706 #endif
 707
 708         ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */
 709
 710         /*
 711          * alloc xmit-buffs / init xmit_cmds
 712          */
 713         for(i=0;i<NUM_XMIT_BUFFS;i++)
 714         {
 715                 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
 716                 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
 717                 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
 718                 ptr = (char *) ptr + XMIT_BUFF_SIZE;
 719                 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
 720                 ptr = (char *) ptr + sizeof(struct tbd_struct);
 721                 if((void *)ptr > (void *)p->iscp)
 722                 {
 723                         printk("%s: not enough shared-mem for your configuration!\n",dev->name);
 724                         return 1;
 725                 }
 726                 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
 727                 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
 728                 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
 729                 p->xmit_cmds[i]->cmd_status = STAT_COMPL;
 730                 p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
 731                 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
 732                 p->xmit_buffs[i]->next = 0xffff;
 733                 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
 734         }
 735
 736         p->xmit_count = 0;
 737         p->xmit_last    = 0;
 738 #ifndef NO_NOPCOMMANDS
 739         p->nop_point    = 0;
 740 #endif
 741
 742          /*
 743                 * 'start transmitter'
 744                 */
 745 #ifndef NO_NOPCOMMANDS
 746         p->scb->cbl_offset = make16(p->nop_cmds[0]);
 747         p->scb->cmd_cuc = CUC_START;
 748         ni_attn586();
 749         WAIT_4_SCB_CMD();
 750 #else
 751         p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
 752         p->xmit_cmds[0]->cmd_cmd        = CMD_XMIT | CMD_SUSPEND | CMD_INT;
 753 #endif
 754
 755         /*
 756          * ack. interrupts
 757          */
 758         p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
 759         ni_attn586();
 760         DELAY_16();
 761
 762         ni_enaint();
 763
 764         return 0;
 765 }
 766
 767 /******************************************************
 768  * This is a helper routine for ni52_rnr_int() and init586().
 769  * It sets up the Receive Frame Area (RFA).
 770  */
 771
 772 static void *alloc_rfa(struct net_device *dev,void *ptr)
 773 {
 774         volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
 775         volatile struct rbd_struct *rbd;
 776         int i;
 777         struct priv *p = (struct priv *) dev->priv;
 778
 779         memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
 780         p->rfd_first = rfd;
 781
 782         for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
 783                 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
 784                 rfd[i].rbd_offset = 0xffff;
 785         }
 786         rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP;         /* RU suspend */
 787
 788         ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
 789
 790         rbd = (struct rbd_struct *) ptr;
 791         ptr = (void *) (rbd + p->num_recv_buffs);
 792
 793          /* clr descriptors */
 794         memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
 795
 796         for(i=0;i<p->num_recv_buffs;i++)
 797         {
 798                 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
 799                 rbd[i].size = RECV_BUFF_SIZE;
 800                 rbd[i].buffer = make24(ptr);
 801                 ptr = (char *) ptr + RECV_BUFF_SIZE;
 802         }
 803
 804         p->rfd_top      = p->rfd_first;
 805         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
 806
 807         p->scb->rfa_offset              = make16(p->rfd_first);
 808         p->rfd_first->rbd_offset        = make16(rbd);
 809
 810         return ptr;
 811 }
 812
 813
 814 /**************************************************
 815  * Interrupt Handler ...
 816  */
 817
 818 static void ni52_interrupt(int irq,void *dev_id,struct pt_regs *reg_ptr)
 819 {
 820         struct net_device *dev = dev_id;
 821         unsigned short stat;
 822         int cnt=0;
 823         struct priv *p;
 824
 825         if (!dev) {
 826                 printk ("ni5210-interrupt: irq %d for unknown device.\n",irq);
 827                 return;
 828         }
 829         p = (struct priv *) dev->priv;
 830
 831         if(debuglevel > 1)
 832                 printk("I");
 833
 834         WAIT_4_SCB_CMD(); /* wait for last command      */
 835
 836         while((stat=p->scb->cus & STAT_MASK))
 837         {
 838                 p->scb->cmd_cuc = stat;
 839                 ni_attn586();
 840
 841                 if(stat & STAT_FR)       /* received a frame */
 842                         ni52_rcv_int(dev);
 843
 844                 if(stat & STAT_RNR) /* RU went 'not ready' */
 845                 {
 846                         printk("(R)");
 847                         if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
 848                         {
 849                                 WAIT_4_SCB_CMD();
 850                                 p->scb->cmd_ruc = RUC_RESUME;
 851                                 ni_attn586();
 852                                 WAIT_4_SCB_CMD_RUC();
 853                         }
 854                         else
 855                         {
 856                                 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
 857                                 ni52_rnr_int(dev);
 858                         }
 859                 }
 860
 861                 if(stat & STAT_CX)              /* command with I-bit set complete */
 862                          ni52_xmt_int(dev);
 863
 864 #ifndef NO_NOPCOMMANDS
 865                 if(stat & STAT_CNA)     /* CU went 'not ready' */
 866                 {
 867                         if(netif_running(dev))
 868                                 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
 869                 }
 870 #endif
 871
 872                 if(debuglevel > 1)
 873                         printk("%d",cnt++);
 874
 875                 WAIT_4_SCB_CMD(); /* wait for ack. (ni52_xmt_int can be faster than ack!!) */
 876                 if(p->scb->cmd_cuc)      /* timed out? */
 877                 {
 878                         printk("%s: Acknowledge timed out.\n",dev->name);
 879                         ni_disint();
 880                         break;
 881                 }
 882         }
 883
 884         if(debuglevel > 1)
 885                 printk("i");
 886 }
 887
 888 /*******************************************************
 889  * receive-interrupt
 890  */
 891
 892 static void ni52_rcv_int(struct net_device *dev)
 893 {
 894         int status,cnt=0;
 895         unsigned short totlen;
 896         struct sk_buff *skb;
 897         struct rbd_struct *rbd;
 898         struct priv *p = (struct priv *) dev->priv;
 899
 900         if(debuglevel > 0)
 901                 printk("R");
 902
 903         for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
 904         {
 905                         rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
 906
 907                         if(status & RFD_OK) /* frame received without error? */
 908                         {
 909                                 if( (totlen = rbd->status) & RBD_LAST) /* the first and the last buffer? */
 910                                 {
 911                                         totlen &= RBD_MASK; /* length of this frame */
 912                                         rbd->status = 0;
 913                                         skb = (struct sk_buff *) dev_alloc_skb(totlen+2);
 914                                         if(skb != NULL)
 915                                         {
 916                                                 skb->dev = dev;
 917                                                 skb_reserve(skb,2);
 918                                                 skb_put(skb,totlen);
 919                                                 eth_copy_and_sum(skb,(char *) p->base+(unsigned long) rbd->buffer,totlen,0);
 920                                                 skb->protocol=eth_type_trans(skb,dev);
 921                                                 netif_rx(skb);
 922                                                 dev->last_rx = jiffies;
 923                                                 p->stats.rx_packets++;
 924                                                 p->stats.rx_bytes += totlen;
 925                                         }
 926                                         else
 927                                                 p->stats.rx_dropped++;
 928                                 }
 929                                 else
 930                                 {
 931                                         int rstat;
 932                                                  /* free all RBD's until RBD_LAST is set */
 933                                         totlen = 0;
 934                                         while(!((rstat=rbd->status) & RBD_LAST))
 935                                         {
 936                                                 totlen += rstat & RBD_MASK;
 937                                                 if(!rstat)
 938                                                 {
 939                                                         printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
 940                                                         break;
 941                                                 }
 942                                                 rbd->status = 0;
 943                                                 rbd = (struct rbd_struct *) make32(rbd->next);
 944                                         }
 945                                         totlen += rstat & RBD_MASK;
 946                                         rbd->status = 0;
 947                                         printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
 948                                         p->stats.rx_dropped++;
 949                          }
 950                 }
 951                 else /* frame !(ok), only with 'save-bad-frames' */
 952                 {
 953                         printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
 954                         p->stats.rx_errors++;
 955                 }
 956                 p->rfd_top->stat_high = 0;
 957                 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
 958                 p->rfd_top->rbd_offset = 0xffff;
 959                 p->rfd_last->last = 0;                          /* delete RFD_SUSP      */
 960                 p->rfd_last = p->rfd_top;
 961                 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
 962                 p->scb->rfa_offset = make16(p->rfd_top);
 963
 964                 if(debuglevel > 0)
 965                         printk("%d",cnt++);
 966         }
 967
 968         if(automatic_resume)
 969         {
 970                 WAIT_4_SCB_CMD();
 971                 p->scb->cmd_ruc = RUC_RESUME;
 972                 ni_attn586();
 973                 WAIT_4_SCB_CMD_RUC();
 974         }
 975
 976 #ifdef WAIT_4_BUSY
 977         {
 978                 int i;
 979                 for(i=0;i<1024;i++)
 980                 {
 981                         if(p->rfd_top->status)
 982                                 break;
 983                         DELAY_16();
 984                         if(i == 1023)
 985                                 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
 986                 }
 987         }
 988 #endif
 989
 990 #if 0
 991         if(!at_least_one)
 992         {
 993                 int i;
 994                 volatile struct rfd_struct *rfds=p->rfd_top;
 995                 volatile struct rbd_struct *rbds;
 996                 printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
 997                 for(i=0;i< (p->num_recv_buffs+4);i++)
 998                 {
 999                         rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
1000                         printk("%04x:%04x ",rfds->status,rbds->status);
1001                         rfds = (struct rfd_struct *) make32(rfds->next);
1002                 }
1003                 printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
1004                 printk("\nerrs: %04x %04x rus: %02x, cus: %02x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->rus,(int)p->scb->cus);
1005         }
1006         old_at_least = at_least_one;
1007 #endif
1008
1009         if(debuglevel > 0)
1010                 printk("r");
1011 }
1012
1013 /**********************************************************
1014  * handle 'Receiver went not ready'.
1015  */
1016
1017 static void ni52_rnr_int(struct net_device *dev)
1018 {
1019         struct priv *p = (struct priv *) dev->priv;
1020
1021         p->stats.rx_errors++;
1022
1023         WAIT_4_SCB_CMD();               /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1024         p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
1025         ni_attn586();
1026         WAIT_4_SCB_CMD_RUC();           /* wait for accept cmd. */
1027
1028         alloc_rfa(dev,(char *)p->rfd_first);
1029 /* maybe add a check here, before restarting the RU */
1030         startrecv586(dev); /* restart RU */
1031
1032         printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
1033
1034 }
1035
1036 /**********************************************************
1037  * handle xmit - interrupt
1038  */
1039
1040 static void ni52_xmt_int(struct net_device *dev)
1041 {
1042         int status;
1043         struct priv *p = (struct priv *) dev->priv;
1044
1045         if(debuglevel > 0)
1046                 printk("X");
1047
1048         status = p->xmit_cmds[p->xmit_last]->cmd_status;
1049         if(!(status & STAT_COMPL))
1050                 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
1051
1052         if(status & STAT_OK)
1053         {
1054                 p->stats.tx_packets++;
1055                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1056         }
1057         else
1058         {
1059                 p->stats.tx_errors++;
1060                 if(status & TCMD_LATECOLL) {
1061                         printk("%s: late collision detected.\n",dev->name);
1062                         p->stats.collisions++;
1063                 }
1064                 else if(status & TCMD_NOCARRIER) {
1065                         p->stats.tx_carrier_errors++;
1066                         printk("%s: no carrier detected.\n",dev->name);
1067                 }
1068                 else if(status & TCMD_LOSTCTS)
1069                         printk("%s: loss of CTS detected.\n",dev->name);
1070                 else if(status & TCMD_UNDERRUN) {
1071                         p->stats.tx_fifo_errors++;
1072                         printk("%s: DMA underrun detected.\n",dev->name);
1073                 }
1074                 else if(status & TCMD_MAXCOLL) {
1075                         printk("%s: Max. collisions exceeded.\n",dev->name);
1076                         p->stats.collisions += 16;
1077                 }
1078         }
1079
1080 #if (NUM_XMIT_BUFFS > 1)
1081         if( (++p->xmit_last) == NUM_XMIT_BUFFS)
1082                 p->xmit_last = 0;
1083 #endif
1084         netif_wake_queue(dev);
1085 }
1086
1087 /***********************************************************
1088  * (re)start the receiver
1089  */
1090
1091 static void startrecv586(struct net_device *dev)
1092 {
1093         struct priv *p = (struct priv *) dev->priv;
1094
1095         WAIT_4_SCB_CMD();
1096         WAIT_4_SCB_CMD_RUC();
1097         p->scb->rfa_offset = make16(p->rfd_first);
1098         p->scb->cmd_ruc = RUC_START;
1099         ni_attn586();           /* start cmd. */
1100         WAIT_4_SCB_CMD_RUC();   /* wait for accept cmd. (no timeout!!) */
1101 }
1102
1103 static void ni52_timeout(struct net_device *dev)
1104 {
1105         struct priv *p = (struct priv *) dev->priv;
1106 #ifndef NO_NOPCOMMANDS
1107         if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
1108         {
1109                 netif_wake_queue(dev);
1110 #ifdef DEBUG
1111                 printk("%s: strange ... timeout with CU active?!?\n",dev->name);
1112                 printk("%s: X0: %04x N0: %04x N1: %04x %d\n",dev->name,(int)p->xmit_cmds[0]->cmd_status,(int)p->nop_cmds[0]->cmd_status,(int)p->nop_cmds[1]->cmd_status,(int)p->nop_point);
1113 #endif
1114                 p->scb->cmd_cuc = CUC_ABORT;
1115                 ni_attn586();
1116                 WAIT_4_SCB_CMD();
1117                 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
1118                 p->scb->cmd_cuc = CUC_START;
1119                 ni_attn586();
1120                 WAIT_4_SCB_CMD();
1121                 dev->trans_start = jiffies;
1122                 return 0;
1123         }
1124 #endif
1125         {
1126 #ifdef DEBUG
1127                 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
1128                 printk("%s: command-stats: %04x %04x\n",dev->name,p->xmit_cmds[0]->cmd_status,p->xmit_cmds[1]->cmd_status);
1129                 printk("%s: check, whether you set the right interrupt number!\n",dev->name);
1130 #endif
1131                 ni52_close(dev);
1132                 ni52_open(dev);
1133         }
1134         dev->trans_start = jiffies;
1135 }
1136
1137 /******************************************************
1138  * send frame
1139  */
1140
1141 static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
1142 {
1143         int len,i;
1144 #ifndef NO_NOPCOMMANDS
1145         int next_nop;
1146 #endif
1147         struct priv *p = (struct priv *) dev->priv;
1148
1149         if(skb->len > XMIT_BUFF_SIZE)
1150         {
1151                 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
1152                 return 0;
1153         }
1154
1155         netif_stop_queue(dev);
1156
1157 #if(NUM_XMIT_BUFFS > 1)
1158         if(test_and_set_bit(0,(void *) &p->lock)) {
1159                 printk("%s: Queue was locked\n",dev->name);
1160                 return 1;
1161         }
1162         else
1163 #endif
1164         {
1165                 memcpy((char *)p->xmit_cbuffs[p->xmit_count],(char *)(skb->data),skb->len);
1166                 len = skb->len;
1167                 if(len < ETH_ZLEN)
1168                 {
1169                         len = ETH_ZLEN;
1170                         memset((char *)p->xmit_cbuffs[p->xmit_count]+skb->len, 0, len - skb->len);
1171                 }
1172
1173 #if (NUM_XMIT_BUFFS == 1)
1174 #       ifdef NO_NOPCOMMANDS
1175
1176 #ifdef DEBUG
1177                 if(p->scb->cus & CU_ACTIVE)
1178                 {
1179                         printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
1180                         printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,p->xmit_cmds[0]->cmd_status);
1181                 }
1182 #endif
1183
1184                 p->xmit_buffs[0]->size = TBD_LAST | len;
1185                 for(i=0;i<16;i++)
1186                 {
1187                         p->xmit_cmds[0]->cmd_status = 0;
1188                         WAIT_4_SCB_CMD();
1189                         if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
1190                                 p->scb->cmd_cuc = CUC_RESUME;
1191                         else
1192                         {
1193                                 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1194                                 p->scb->cmd_cuc = CUC_START;
1195                         }
1196
1197                         ni_attn586();
1198                         dev->trans_start = jiffies;
1199                         if(!i)
1200                                 dev_kfree_skb(skb);
1201                         WAIT_4_SCB_CMD();
1202                         if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
1203                                 break;
1204                         if(p->xmit_cmds[0]->cmd_status)
1205                                 break;
1206                         if(i==15)
1207                                 printk("%s: Can't start transmit-command.\n",dev->name);
1208                 }
1209 #       else
1210                 next_nop = (p->nop_point + 1) & 0x1;
1211                 p->xmit_buffs[0]->size = TBD_LAST | len;
1212
1213                 p->xmit_cmds[0]->cmd_link        = p->nop_cmds[next_nop]->cmd_link
1214                                                                                                                                 = make16((p->nop_cmds[next_nop]));
1215                 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1216
1217                 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1218                 dev->trans_start = jiffies;
1219                 p->nop_point = next_nop;
1220                 dev_kfree_skb(skb);
1221 #       endif
1222 #else
1223                 p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
1224                 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
1225                         next_nop = 0;
1226
1227                 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1228                 /* linkpointer of xmit-command already points to next nop cmd */
1229                 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
1230                 p->nop_cmds[next_nop]->cmd_status = 0;
1231
1232                 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1233                 dev->trans_start = jiffies;
1234                 p->xmit_count = next_nop;
1235
1236                 {
1237                         unsigned long flags;
1238                         save_flags(flags);
1239                         cli();
1240                         if(p->xmit_count != p->xmit_last)
1241                                 netif_wake_queue(dev);
1242                         p->lock = 0;
1243                         restore_flags(flags);
1244                 }
1245                 dev_kfree_skb(skb);
1246 #endif
1247         }
1248         return 0;
1249 }
1250
1251 /*******************************************
1252  * Someone wanna have the statistics
1253  */
1254
1255 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1256 {
1257         struct priv *p = (struct priv *) dev->priv;
1258         unsigned short crc,aln,rsc,ovrn;
1259
1260         crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
1261         p->scb->crc_errs = 0;
1262         aln = p->scb->aln_errs;
1263         p->scb->aln_errs = 0;
1264         rsc = p->scb->rsc_errs;
1265         p->scb->rsc_errs = 0;
1266         ovrn = p->scb->ovrn_errs;
1267         p->scb->ovrn_errs = 0;
1268
1269         p->stats.rx_crc_errors += crc;
1270         p->stats.rx_fifo_errors += ovrn;
1271         p->stats.rx_frame_errors += aln;
1272         p->stats.rx_dropped += rsc;
1273
1274         return &p->stats;
1275 }
1276
1277 /********************************************************
1278  * Set MC list ..
1279  */
1280
1281 static void set_multicast_list(struct net_device *dev)
1282 {
1283         netif_stop_queue(dev);
1284         ni_disint();
1285         alloc586(dev);
1286         init586(dev);
1287         startrecv586(dev);
1288         ni_enaint();
1289         netif_wake_queue(dev);
1290 }
1291
1292 #ifdef MODULE
1293 static struct net_device dev_ni52;
1294
1295 /* set: io,irq,memstart,memend or set it when calling insmod */
1296 static int irq=9;
1297 static int io=0x300;
1298 static long memstart;   /* e.g 0xd0000 */
1299 static long memend;     /* e.g 0xd4000 */
1300
1301 MODULE_PARM(io, "i");
1302 MODULE_PARM(irq, "i");
1303 MODULE_PARM(memstart, "l");
1304 MODULE_PARM(memend, "l");
1305 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1306 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1307 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1308 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1309
1310 int init_module(void)
1311 {
1312         if(io <= 0x0 || !memend || !memstart || irq < 2) {
1313                 printk("ni52: Autoprobing not allowed for modules.\nni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1314                 return -ENODEV;
1315         }
1316         dev_ni52.init = ni52_probe;
1317         dev_ni52.irq = irq;
1318         dev_ni52.base_addr = io;
1319         dev_ni52.mem_end = memend;
1320         dev_ni52.mem_start = memstart;
1321         if (register_netdev(&dev_ni52) != 0)
1322                 return -EIO;
1323         return 0;
1324 }
1325
1326 void cleanup_module(void)
1327 {
1328         release_region(dev_ni52.base_addr, NI52_TOTAL_SIZE);
1329         unregister_netdev(&dev_ni52);
1330         kfree(dev_ni52.priv);
1331         dev_ni52.priv = NULL;
1332 }
1333 #endif /* MODULE */
1334
1335 #if 0
1336 /*
1337  * DUMP .. we expect a not running CMD unit and enough space
1338  */
1339 void ni52_dump(struct net_device *dev,void *ptr)
1340 {
1341         struct priv *p = (struct priv *) dev->priv;
1342         struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
1343         int i;
1344
1345         p->scb->cmd_cuc = CUC_ABORT;
1346         ni_attn586();
1347         WAIT_4_SCB_CMD();
1348         WAIT_4_SCB_CMD_RUC();
1349
1350         dump_cmd->cmd_status = 0;
1351         dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
1352         dump_cmd->dump_offset = make16((dump_cmd + 1));
1353         dump_cmd->cmd_link = 0xffff;
1354
1355         p->scb->cbl_offset = make16(dump_cmd);
1356         p->scb->cmd_cuc = CUC_START;
1357         ni_attn586();
1358         WAIT_4_STAT_COMPL(dump_cmd);
1359
1360         if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
1361                                 printk("%s: Can't get dump information.\n",dev->name);
1362
1363         for(i=0;i<170;i++) {
1364                 printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);
1365                 if(i % 24 == 23)
1366                         printk("\n");
1367         }
1368         printk("\n");
1369 }
1370 #endif
1371 MODULE_LICENSE("GPL");
1372
1373 /*
1374  * END: linux/drivers/net/ni52.c
1375  */