drivers/net/ni52.c

/* */
This source file includes following definitions.
ni52_close
ni52_open
check586
alloc586
ni52_probe
ni52_probe1
init586
alloc_rfa
ni52_interrupt
ni52_rcv_int
ni52_rnr_int
ni52_xmt_int
startrecv586
ni52_send_packet
ni52_get_stats
set_multicast_list
init_module
cleanup_module
ni52_dump
   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 Public License that covers that work.
   6  * 
   7  * Alphacode 0.80 (96/02/19) for Linux 1.3.66 (or later)
   8  * Copyrights (c) 1994,1995,1996 by M.Hipp (Michael.Hipp@student.uni-tuebingen.de)
   9  *    [feel free to mail ....]
  10  *
  11  * when using as module: (no autoprobing!)
  12  *   compile with: gcc -D__KERNEL__ -DMODULE -O2 -c ni52.c
  13  *   run with e.g: 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 helped
  35  *    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 better.
  41  *   my experience is, that if a machine sends with more then about 500-600K/s
  42  *   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 remote 
  47  *   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 run this mode)
  62  */
  63 
  64 /*
  65  * 19.Feb.96: more Mcast changes, module support (MH)
  66  *
  67  * 18.Nov.95: Mcast changes (AC).
  68  *
  69  * 23.April.95: fixed(?) receiving problems by configuring a RFD more
  70  *              than the number of RBD's. Can maybe cause other problems. 
  71  * 18.April.95: Added MODULE support (MH)
  72  * 17.April.95: MC related changes in init586() and set_multicast_list().
  73  *              removed use of 'jiffies' in init586() (MH)
  74  *
  75  * 19.Sep.94: Added Multicast support (not tested yet) (MH)
  76  * 
  77  * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling. 
  78  *            Now, every RFD has exact one RBD. (MH)
  79  *
  80  * 14.Sep.94: added promiscuous mode, a few cleanups (MH)
  81  *
  82  * 19.Aug.94: changed request_irq() parameter (MH)
  83  * 
  84  * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)
  85  *
  86  * 19.July.94: lotsa cleanups .. (MH)
  87  *
  88  * 17.July.94: some patches ... verified to run with 1.1.29 (MH)
  89  *
  90  * 4.July.94: patches for Linux 1.1.24  (MH)
  91  *
  92  * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)
  93  *
  94  * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff, too (MH)
  95  *
  96  * < 30.Sep.93: first versions 
  97  */
  98 
  99 static int debuglevel = 0; /* debug-printk 0: off 1: a few 2: more */
 100 static int automatic_resume = 0; /* experimental .. better should be zero */
 101 static int rfdadd = 0; /* rfdadd=1 may be better for 8K MEM cards */
 102 static int fifo=0x8;    /* don't change */
 103 
 104 /* #define REALLY_SLOW_IO */
 105 
 106 #include <linux/module.h>
 107 #include <linux/kernel.h>
 108 #include <linux/string.h>
 109 #include <linux/errno.h>
 110 #include <linux/ioport.h>
 111 #include <linux/malloc.h>
 112 #include <linux/interrupt.h>
 113 #include <linux/delay.h>
 114 #include <asm/bitops.h>
 115 #include <asm/io.h>
 116 
 117 #include <linux/netdevice.h>
 118 #include <linux/etherdevice.h>
 119 #include <linux/skbuff.h>
 120 
 121 #include "ni52.h"
 122 
 123 #define DEBUG       /* debug on */
 124 #define SYSBUSVAL 1 /* 8 Bit */
 125 
 126 #define ni_attn586()  {outb(0,dev->base_addr+NI52_ATTENTION);}
 127 #define ni_reset586() {outb(0,dev->base_addr+NI52_RESET);}
 128 #define ni_disint()   {outb(0,dev->base_addr+NI52_INTDIS);}
 129 #define ni_enaint()   {outb(0,dev->base_addr+NI52_INTENA);}
 130 
 131 #define make32(ptr16) (p->memtop + (short) (ptr16) )
 132 #define make24(ptr32) ((char *) (ptr32) - p->base)
 133 #define make16(ptr32) ((unsigned short) ((unsigned long) (ptr32) - (unsigned long) p->memtop ))
 134 
 135 /******************* how to calculate the buffers *****************************
 136 
 137   * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
 138   * --------------- in a different (more stable?) mode. Only in this mode it's
 139   *                 possible to configure the driver with 'NO_NOPCOMMANDS'
 140 
 141 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
 142 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
 143 sizeof(rfd) = 24; sizeof(rbd) = 12; 
 144 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
 145 sizeof(nop_cmd) = 8; 
 146 
 147   * if you don't know the driver, better do not change these values: */
 148 
 149 #define RECV_BUFF_SIZE 1524 /* slightly oversized */
 150 #define XMIT_BUFF_SIZE 1524 /* slightly oversized */
 151 #define NUM_XMIT_BUFFS 1    /* config for both, 8K and 16K shmem */
 152 #define NUM_RECV_BUFFS_8  4 /* config for 8K shared mem */
 153 #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
 154 #define NO_NOPCOMMANDS      /* only possible with NUM_XMIT_BUFFS=1 */
 155 
 156 /**************************************************************************/
 157 
 158 /* different DELAYs */
 159 #define DELAY(x) __delay((loops_per_sec>>5)*(x)); 
 160 #define DELAY_16(); { __delay( (loops_per_sec>>16)+1 ); }
 161 #define DELAY_18(); { __delay( (loops_per_sec>>18)+1 ); }
 162 
 163 /* wait for command with timeout: */
 164 #define WAIT_4_SCB_CMD() { int i; \
 165   for(i=0;i<16384;i++) { \
 166     if(!p->scb->cmd_cuc) break; \
 167     DELAY_18(); \
 168     if(i == 16383) { \
 169       printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \
 170        if(!p->reseted) { p->reseted = 1; ni_reset586(); } } } }
 171 
 172 #define WAIT_4_SCB_CMD_RUC() { int i; \
 173   for(i=0;i<16384;i++) { \
 174     if(!p->scb->cmd_ruc) break; \
 175     DELAY_18(); \
 176     if(i == 16383) { \
 177       printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \
 178        if(!p->reseted) { p->reseted = 1; ni_reset586(); } } } }
 179 
 180 #define WAIT_4_STAT_COMPL(addr) { int i; \
 181    for(i=0;i<32767;i++) { \
 182      if((addr)->cmd_status & STAT_COMPL) break; \
 183      DELAY_16(); DELAY_16(); } }
 184 
 185 #define NI52_TOTAL_SIZE 16
 186 #define NI52_ADDR0 0x02
 187 #define NI52_ADDR1 0x07
 188 #define NI52_ADDR2 0x01
 189 
 190 static int     ni52_probe1(struct device *dev,int ioaddr);
 191 static void    ni52_interrupt(int irq,void *dev_id,struct pt_regs *reg_ptr);
 192 static int     ni52_open(struct device *dev);
 193 static int     ni52_close(struct device *dev);
 194 static int     ni52_send_packet(struct sk_buff *,struct device *);
 195 static struct  enet_statistics *ni52_get_stats(struct device *dev);
 196 static void    set_multicast_list(struct device *dev);
 197 #if 0
 198 static void    ni52_dump(struct device *,void *);
 199 #endif
 200 
 201 /* helper-functions */
 202 static int     init586(struct device *dev);
 203 static int     check586(struct device *dev,char *where,unsigned size);
 204 static void    alloc586(struct device *dev);
 205 static void    startrecv586(struct device *dev);
 206 static void   *alloc_rfa(struct device *dev,void *ptr);
 207 static void    ni52_rcv_int(struct device *dev);
 208 static void    ni52_xmt_int(struct device *dev);
 209 static void    ni52_rnr_int(struct device *dev);
 210 
 211 struct priv
 212 {
 213   struct enet_statistics stats;
 214   unsigned long base;
 215   char *memtop;
 216   int lock,reseted;
 217   volatile struct rfd_struct  *rfd_last,*rfd_top,*rfd_first;
 218   volatile struct scp_struct  *scp;  /* volatile is important */
 219   volatile struct iscp_struct *iscp; /* volatile is important */
 220   volatile struct scb_struct  *scb;  /* volatile is important */
 221   volatile struct tbd_struct  *xmit_buffs[NUM_XMIT_BUFFS];
 222   volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
 223 #if (NUM_XMIT_BUFFS == 1)
 224   volatile struct nop_cmd_struct *nop_cmds[2];
 225 #else
 226   volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
 227 #endif
 228   volatile int    nop_point,num_recv_buffs;
 229   volatile char  *xmit_cbuffs[NUM_XMIT_BUFFS];
 230   volatile int    xmit_count,xmit_last;
 231 };
 232 
 233 /**********************************************
 234  * close device 
 235  */
 236 static int ni52_close(struct device *dev)
     /*  */
 237 {
 238   free_irq(dev->irq, NULL);
 239   irq2dev_map[dev->irq] = NULL;
 240 
 241   ni_reset586(); /* the hard way to stop the receiver */
 242 
 243   dev->start = 0;
 244   dev->tbusy = 0;
 245 
 246   MOD_DEC_USE_COUNT;
 247 
 248   return 0;
 249 }
 250 
 251 /**********************************************
 252  * open device 
 253  */
 254 static int ni52_open(struct device *dev)
     /*  */
 255 {
 256   ni_disint();
 257   alloc586(dev);
 258   init586(dev);  
 259   startrecv586(dev);
 260   ni_enaint();
 261 
 262   if(request_irq(dev->irq, &ni52_interrupt,0,"ni5210",NULL)) 
 263   {
 264     ni_reset586();
 265     return -EAGAIN;
 266   }  
 267   irq2dev_map[dev->irq] = dev;
 268 
 269   dev->interrupt = 0;
 270   dev->tbusy = 0;
 271   dev->start = 1;
 272 
 273   MOD_INC_USE_COUNT;
 274 
 275   return 0; /* most done by init */
 276 }
 277 
 278 /**********************************************
 279  * Check to see if there's an 82586 out there. 
 280  */
 281 static int check586(struct device *dev,char *where,unsigned size)
     /*  */
 282 {
 283   struct priv pb;
 284   struct priv *p = /* (struct priv *) dev->priv*/ &pb;
 285   char *iscp_addrs[2];
 286   int i;
 287 
 288   p->base = (unsigned long) where + size - 0x01000000;
 289   p->memtop = where + size;
 290   p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
 291   memset((char *)p->scp,0, sizeof(struct scp_struct));
 292   for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */
 293     if(((char *)p->scp)[i])
 294       return 0;
 295   p->scp->sysbus = SYSBUSVAL;        /* 1 = 8Bit-Bus, 0 = 16 Bit */
 296   if(p->scp->sysbus != SYSBUSVAL)
 297     return 0;
 298   
 299   iscp_addrs[0] = where;
 300   iscp_addrs[1]= (char *) p->scp - sizeof(struct iscp_struct);
 301 
 302   for(i=0;i<2;i++)
 303   {
 304     p->iscp = (struct iscp_struct *) iscp_addrs[i];
 305     memset((char *)p->iscp,0, sizeof(struct iscp_struct));
 306 
 307     p->scp->iscp = make24(p->iscp);
 308     p->iscp->busy = 1;
 309 
 310     ni_reset586();
 311     ni_attn586();
 312     DELAY(1);   /* wait a while... */
 313 
 314     if(p->iscp->busy) /* i82586 clears 'busy' after successful init */
 315       return 0;
 316   }
 317   return 1;
 318 }
 319 
 320 /******************************************************************
 321  * set iscp at the right place, called by ni52_probe1 and open586. 
 322  */
 323 void alloc586(struct device *dev)
     /*  */
 324 {
 325   struct priv *p =  (struct priv *) dev->priv; 
 326 
 327   ni_reset586();
 328   DELAY(1);
 329 
 330   p->scp  = (struct scp_struct *)  (p->base + SCP_DEFAULT_ADDRESS);
 331   p->scb  = (struct scb_struct *)  (dev->mem_start);
 332   p->iscp = (struct iscp_struct *) ((char *)p->scp - sizeof(struct iscp_struct));
 333 
 334   memset((char *) p->iscp,0,sizeof(struct iscp_struct));
 335   memset((char *) p->scp ,0,sizeof(struct scp_struct));
 336 
 337   p->scp->iscp = make24(p->iscp);
 338   p->scp->sysbus = SYSBUSVAL;
 339   p->iscp->scb_offset = make16(p->scb);
 340 
 341   p->iscp->busy = 1;
 342   ni_reset586();
 343   ni_attn586();
 344 
 345   DELAY(1); 
 346 
 347   if(p->iscp->busy)
 348     printk("%s: Init-Problems (alloc).\n",dev->name);
 349 
 350   p->reseted = 0;
 351 
 352   memset((char *)p->scb,0,sizeof(struct scb_struct));
 353 }
 354 
 355 /**********************************************
 356  * probe the ni5210-card
 357  */
 358 int ni52_probe(struct device *dev)
     /*  */
 359 {
 360 #ifndef MODULE
 361   int *port;
 362   static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
 363 #endif
 364   int base_addr = dev->base_addr;
 365 
 366   if (base_addr > 0x1ff)                /* Check a single specified location. */
 367     if( (inb(base_addr+NI52_MAGIC1) == NI52_MAGICVAL1) &&
 368         (inb(base_addr+NI52_MAGIC2) == NI52_MAGICVAL2))
 369       return ni52_probe1(dev, base_addr);
 370   else if (base_addr > 0)               /* Don't probe at all. */
 371     return ENXIO;
 372 
 373 #ifdef MODULE
 374   printk("%s: no autoprobing allowed for modules.\n",dev->name);
 375 #else
 376   for (port = ports; *port; port++) {
 377     int ioaddr = *port;
 378     if (check_region(ioaddr, NI52_TOTAL_SIZE))
 379       continue;
 380     if( !(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) || 
 381         !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2))
 382       continue;
 383 
 384     dev->base_addr = ioaddr;
 385     if (ni52_probe1(dev, ioaddr) == 0)
 386       return 0;
 387   }
 388 
 389 #ifdef FULL_IO_PROBE
 390   for(dev->base_addr=0x200;dev->base_addr<0x400;dev->base_addr+=8)
 391   {
 392     int ioaddr = dev->base_addr;
 393     if (check_region(ioaddr, NI52_TOTAL_SIZE))
 394       continue;
 395     if( !(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) || 
 396         !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2))
 397       continue;
 398     if (ni52_probe1(dev, ioaddr) == 0)
 399       return 0;    
 400   }
 401 #endif
 402 
 403 #endif
 404 
 405   dev->base_addr = base_addr;
 406   return ENODEV;
 407 }
 408 
 409 static int ni52_probe1(struct device *dev,int ioaddr)
     /*  */
 410 {
 411   int i,size;
 412 
 413   for(i=0;i<ETH_ALEN;i++)
 414     dev->dev_addr[i] = inb(dev->base_addr+i);
 415 
 416   if(dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
 417      || dev->dev_addr[2] != NI52_ADDR2)
 418     return ENODEV;
 419 
 420   printk("%s: NI5210 found at %#3lx, ",dev->name,dev->base_addr);
 421 
 422   request_region(ioaddr,NI52_TOTAL_SIZE,"ni5210");
 423 
 424   /* 
 425    * check (or search) IO-Memory, 8K and 16K
 426    */
 427 #ifdef MODULE
 428   size = dev->mem_end - dev->mem_start;
 429   if(size != 0x2000 && size != 0x4000)
 430   {
 431     printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n",dev->name,size);
 432     return ENODEV;
 433   }
 434   if(!check586(dev,(char *) dev->mem_start,size))
 435   {
 436     printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
 437     return ENODEV;
 438   }
 439 #else
 440   if(dev->mem_start != 0) /* no auto-mem-probe */
 441   {
 442     size = 0x4000; /* check for 16K mem */
 443     if(!check586(dev,(char *) dev->mem_start,size)) {
 444       size = 0x2000; /* check for 8K mem */
 445       if(!check586(dev,(char *) dev->mem_start,size)) {
 446         printk("?memprobe, Can't find memory at 0x%lx!\n",dev->mem_start);
 447         return ENODEV;
 448       }
 449     }
 450   }
 451   else  
 452   {
 453    static long memaddrs[] = { 0xc8000,0xca000,0xcc000,0xce000,0xd0000,0xd2000,
 454                               0xd4000,0xd6000,0xd8000,0xda000,0xdc000, 0 };
 455    for(i=0;;i++)
 456     {
 457       if(!memaddrs[i]) {
 458         printk("?memprobe, Can't find io-memory!\n");
 459         return ENODEV;
 460       }
 461       dev->mem_start = memaddrs[i];
 462       size = 0x2000; /* check for 8K mem */
 463       if(check586(dev,(char *)dev->mem_start,size)) /* 8K-check */
 464         break;
 465       size = 0x4000; /* check for 16K mem */
 466       if(check586(dev,(char *)dev->mem_start,size)) /* 16K-check */
 467         break;
 468     }
 469   }
 470   dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */
 471 #endif
 472 
 473   dev->priv = (void *) kmalloc(sizeof(struct priv),GFP_KERNEL); 
 474   if(dev->priv == NULL)
 475   {
 476     printk("%s: Ooops .. can't allocate private driver memory.\n",dev->name);
 477     return -ENOMEM;
 478   }
 479                                   /* warning: we don't free it on errors */
 480   memset((char *) dev->priv,0,sizeof(struct priv));
 481   
 482   ((struct priv *) (dev->priv))->memtop = (char *) dev->mem_start + size;
 483   ((struct priv *) (dev->priv))->base =  dev->mem_start + size - 0x01000000;
 484   alloc586(dev);
 485 
 486   /* set number of receive-buffs according to memsize */
 487   if(size == 0x2000)
 488     ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_8;
 489   else
 490     ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_16;
 491 
 492   printk("Memaddr: 0x%lx, Memsize: %d, ",dev->mem_start,size);
 493 
 494   if(dev->irq < 2)
 495   {
 496     autoirq_setup(0);
 497     ni_reset586();
 498     ni_attn586();
 499     if(!(dev->irq = autoirq_report(2)))
 500     {
 501       printk("?autoirq, Failed to detect IRQ line!\n"); 
 502       return 1;
 503     }
 504     printk("IRQ %d (autodetected).\n",dev->irq);
 505   }
 506   else  {
 507     if(dev->irq == 2)
 508       dev->irq = 9;
 509     printk("IRQ %d (assigned and not checked!).\n",dev->irq);
 510   }
 511 
 512   dev->open            = &ni52_open;
 513   dev->stop            = &ni52_close;
 514   dev->get_stats       = &ni52_get_stats;
 515   dev->hard_start_xmit = &ni52_send_packet;
 516   dev->set_multicast_list = &set_multicast_list;
 517 
 518   dev->if_port         = 0;
 519 
 520   ether_setup(dev);
 521 
 522   dev->tbusy = 0;
 523   dev->interrupt = 0;
 524   dev->start = 0;
 525   
 526   return 0;
 527 }
 528 
 529 /********************************************** 
 530  * init the chip (ni52-interrupt should be disabled?!)
 531  * needs a correct 'allocated' memory
 532  */
 533 
 534 static int init586(struct device *dev)
     /*  */
 535 {
 536   void *ptr;
 537   int i,result=0;
 538   struct priv *p = (struct priv *) dev->priv;
 539   volatile struct configure_cmd_struct  *cfg_cmd;
 540   volatile struct iasetup_cmd_struct *ias_cmd;
 541   volatile struct tdr_cmd_struct *tdr_cmd;
 542   volatile struct mcsetup_cmd_struct *mc_cmd;
 543   struct dev_mc_list *dmi=dev->mc_list;
 544   int num_addrs=dev->mc_count;
 545 
 546   ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
 547 
 548   cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
 549   cfg_cmd->cmd_status = 0;
 550   cfg_cmd->cmd_cmd    = CMD_CONFIGURE | CMD_LAST;
 551   cfg_cmd->cmd_link   = 0xffff;
 552 
 553   cfg_cmd->byte_cnt   = 0x0a; /* number of cfg bytes */
 554   cfg_cmd->fifo       = fifo; /* fifo-limit (8=tx:32/rx:64) */
 555   cfg_cmd->sav_bf     = 0x40; /* hold or discard bad recv frames (bit 7) */
 556   cfg_cmd->adr_len    = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
 557   cfg_cmd->priority   = 0x00;
 558   cfg_cmd->ifs        = 0x60;
 559   cfg_cmd->time_low   = 0x00;
 560   cfg_cmd->time_high  = 0xf2;
 561   cfg_cmd->promisc    = 0;
 562   if(dev->flags & IFF_ALLMULTI) {
 563     int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
 564     if(num_addrs > len)  {
 565       printk("%s: switching to promisc. mode\n",dev->name);
 566       dev->flags|=IFF_PROMISC;
 567     }
 568   }
 569   if(dev->flags&IFF_PROMISC)
 570   {
 571        cfg_cmd->promisc=1;
 572        dev->flags|=IFF_PROMISC;
 573   }
 574   cfg_cmd->carr_coll  = 0x00;
 575  
 576   p->scb->cbl_offset = make16(cfg_cmd);
 577   p->scb->cmd_ruc = 0;
 578 
 579   p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
 580   ni_attn586();
 581 
 582   WAIT_4_STAT_COMPL(cfg_cmd);
 583 
 584   if((cfg_cmd->cmd_status & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))
 585   {
 586     printk("%s: configure command failed: %x\n",dev->name,cfg_cmd->cmd_status);
 587     return 1; 
 588   }
 589 
 590     /*
 591      * individual address setup
 592      */
 593   ias_cmd = (struct iasetup_cmd_struct *)ptr;
 594 
 595   ias_cmd->cmd_status = 0;
 596   ias_cmd->cmd_cmd    = CMD_IASETUP | CMD_LAST;
 597   ias_cmd->cmd_link   = 0xffff;
 598 
 599   memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN);
 600 
 601   p->scb->cbl_offset = make16(ias_cmd);
 602 
 603   p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
 604   ni_attn586();
 605 
 606   WAIT_4_STAT_COMPL(ias_cmd);
 607 
 608   if((ias_cmd->cmd_status & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {
 609     printk("%s (ni52): individual address setup command failed: %04x\n",dev->name,ias_cmd->cmd_status);
 610     return 1; 
 611   }
 612 
 613    /* 
 614     * TDR, wire check .. e.g. no resistor e.t.c 
 615     */
 616   tdr_cmd = (struct tdr_cmd_struct *)ptr;
 617 
 618   tdr_cmd->cmd_status  = 0;
 619   tdr_cmd->cmd_cmd     = CMD_TDR | CMD_LAST;
 620   tdr_cmd->cmd_link    = 0xffff;
 621   tdr_cmd->status      = 0;
 622 
 623   p->scb->cbl_offset = make16(tdr_cmd);
 624   p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
 625   ni_attn586();
 626 
 627   WAIT_4_STAT_COMPL(tdr_cmd);
 628 
 629   if(!(tdr_cmd->cmd_status & STAT_COMPL))
 630   {
 631     printk("%s: Problems while running the TDR.\n",dev->name);
 632   }
 633   else
 634   {
 635     DELAY_16(); /* wait for result */
 636     result = tdr_cmd->status;
 637 
 638     p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
 639     ni_attn586(); /* ack the interrupts */
 640 
 641     if(result & TDR_LNK_OK) 
 642       ;
 643     else if(result & TDR_XCVR_PRB)
 644       printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);
 645     else if(result & TDR_ET_OPN)
 646       printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
 647     else if(result & TDR_ET_SRT) 
 648     {
 649       if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
 650         printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
 651     }
 652     else
 653       printk("%s: TDR: Unknown status %04x\n",dev->name,result);
 654   }
 655 
 656   /*
 657    * Multicast setup
 658    */
 659   if(num_addrs && !(dev->flags & IFF_PROMISC) )
 660   {
 661     mc_cmd = (struct mcsetup_cmd_struct *) ptr;
 662     mc_cmd->cmd_status = 0;
 663     mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
 664     mc_cmd->cmd_link = 0xffff;
 665     mc_cmd->mc_cnt = num_addrs * 6;
 666 
 667     for(i=0;i<num_addrs;i++,dmi=dmi->next)
 668       memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr,6);
 669 
 670     p->scb->cbl_offset = make16(mc_cmd);
 671     p->scb->cmd_cuc = CUC_START;
 672     ni_attn586();
 673 
 674     WAIT_4_STAT_COMPL(mc_cmd);
 675 
 676     if( (mc_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
 677       printk("%s: Can't apply multicast-address-list.\n",dev->name);
 678   }
 679 
 680    /*
 681     * alloc nop/xmit-cmds
 682     */
 683 #if (NUM_XMIT_BUFFS == 1)
 684   for(i=0;i<2;i++)
 685   {
 686     p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
 687     p->nop_cmds[i]->cmd_cmd    = CMD_NOP;
 688     p->nop_cmds[i]->cmd_status = 0;
 689     p->nop_cmds[i]->cmd_link   = make16((p->nop_cmds[i]));
 690     ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 691   }
 692 #else
 693   for(i=0;i<NUM_XMIT_BUFFS;i++)
 694   {
 695     p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
 696     p->nop_cmds[i]->cmd_cmd    = CMD_NOP;
 697     p->nop_cmds[i]->cmd_status = 0;
 698     p->nop_cmds[i]->cmd_link   = make16((p->nop_cmds[i]));
 699     ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 700   }
 701 #endif
 702 
 703   ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */ 
 704 
 705   /*
 706    * alloc xmit-buffs / init xmit_cmds
 707    */
 708   for(i=0;i<NUM_XMIT_BUFFS;i++)
 709   {
 710     p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
 711     ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
 712     p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
 713     ptr = (char *) ptr + XMIT_BUFF_SIZE;
 714     p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
 715     ptr = (char *) ptr + sizeof(struct tbd_struct);
 716     if((void *)ptr > (void *)p->iscp) 
 717     {
 718       printk("%s: not enough shared-mem for your configuration!\n",dev->name);
 719       return 1;
 720     }   
 721     memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
 722     memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
 723     p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
 724     p->xmit_cmds[i]->cmd_status = STAT_COMPL;
 725     p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
 726     p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
 727     p->xmit_buffs[i]->next = 0xffff;
 728     p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
 729   }
 730 
 731   p->xmit_count = 0; 
 732   p->xmit_last  = 0;
 733 #ifndef NO_NOPCOMMANDS
 734   p->nop_point  = 0;
 735 #endif
 736 
 737    /*
 738     * 'start transmitter'
 739     */
 740 #ifndef NO_NOPCOMMANDS
 741   p->scb->cbl_offset = make16(p->nop_cmds[0]);
 742   p->scb->cmd_cuc = CUC_START;
 743   ni_attn586();
 744   WAIT_4_SCB_CMD();
 745 #else
 746   p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
 747   p->xmit_cmds[0]->cmd_cmd  = CMD_XMIT | CMD_SUSPEND | CMD_INT;
 748 #endif
 749 
 750   /*
 751    * ack. interrupts
 752    */
 753   p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
 754   ni_attn586();
 755   DELAY_16();
 756 
 757   ni_enaint();
 758 
 759   return 0;
 760 }
 761 
 762 /******************************************************
 763  * This is a helper routine for ni52_rnr_int() and init586(). 
 764  * It sets up the Receive Frame Area (RFA).
 765  */
 766 
 767 static void *alloc_rfa(struct device *dev,void *ptr) 
     /*  */
 768 {
 769   volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
 770   volatile struct rbd_struct *rbd;
 771   int i;
 772   struct priv *p = (struct priv *) dev->priv;
 773 
 774   memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
 775   p->rfd_first = rfd;
 776 
 777   for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
 778     rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
 779     rfd[i].rbd_offset = 0xffff;
 780   }
 781   rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP;   /* RU suspend */
 782 
 783   ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
 784 
 785   rbd = (struct rbd_struct *) ptr;
 786   ptr = (void *) (rbd + p->num_recv_buffs);
 787 
 788    /* clr descriptors */
 789   memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
 790 
 791   for(i=0;i<p->num_recv_buffs;i++)
 792   {
 793     rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
 794     rbd[i].size = RECV_BUFF_SIZE;
 795     rbd[i].buffer = make24(ptr);
 796     ptr = (char *) ptr + RECV_BUFF_SIZE;
 797   }
 798 
 799   p->rfd_top  = p->rfd_first;
 800   p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
 801 
 802   p->scb->rfa_offset            = make16(p->rfd_first);
 803   p->rfd_first->rbd_offset      = make16(rbd);
 804 
 805   return ptr;
 806 }
 807 
 808 
 809 /**************************************************
 810  * Interrupt Handler ...
 811  */
 812 
 813 static void ni52_interrupt(int irq,void *dev_id,struct pt_regs *reg_ptr)
     /*  */
 814 {
 815   struct device *dev = (struct device *) irq2dev_map[irq];
 816   unsigned short stat;
 817   int cnt=0;
 818   struct priv *p;
 819 
 820   if (!dev) {
 821     printk ("ni5210-interrupt: irq %d for unknown device.\n",irq);
 822     return;
 823   }
 824   p = (struct priv *) dev->priv;
 825 
 826   if(debuglevel > 1)
 827     printk("I");
 828 
 829   dev->interrupt = 1;
 830 
 831   WAIT_4_SCB_CMD(); /* wait for last command  */
 832 
 833   while((stat=p->scb->cus & STAT_MASK))
 834   {
 835     p->scb->cmd_cuc = stat;
 836     ni_attn586();
 837 
 838     if(stat & STAT_FR)   /* received a frame */
 839       ni52_rcv_int(dev);
 840 
 841     if(stat & STAT_RNR) /* RU went 'not ready' */
 842     {
 843       printk("(R)");
 844       if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
 845       {
 846         WAIT_4_SCB_CMD();
 847         p->scb->cmd_ruc = RUC_RESUME;
 848         ni_attn586();
 849         WAIT_4_SCB_CMD_RUC();
 850       }
 851       else
 852       {
 853         printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
 854         ni52_rnr_int(dev); 
 855       }
 856     }
 857 
 858     if(stat & STAT_CX)    /* command with I-bit set complete */
 859        ni52_xmt_int(dev);
 860 
 861 #ifndef NO_NOPCOMMANDS
 862     if(stat & STAT_CNA)  /* CU went 'not ready' */
 863     {
 864       if(dev->start)
 865         printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
 866     }
 867 #endif
 868 
 869     if(debuglevel > 1)
 870       printk("%d",cnt++);
 871 
 872     WAIT_4_SCB_CMD(); /* wait for ack. (ni52_xmt_int can be faster than ack!!) */
 873     if(p->scb->cmd_cuc)   /* timed out? */
 874     {
 875       printk("%s: Acknowledge timed out.\n",dev->name);
 876       ni_disint();
 877       break;
 878     }
 879   }
 880 
 881   if(debuglevel > 1)
 882     printk("i");
 883 
 884   dev->interrupt = 0;
 885 }
 886 
 887 /*******************************************************
 888  * receive-interrupt
 889  */
 890 
 891 static void ni52_rcv_int(struct device *dev)
     /*  */
 892 {
 893   int status,cnt=0;
 894   unsigned short totlen;
 895   struct sk_buff *skb;
 896   struct rbd_struct *rbd;
 897   struct priv *p = (struct priv *) dev->priv;
 898 
 899   if(debuglevel > 0)
 900     printk("R");
 901 
 902   for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
 903   {
 904       rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
 905 
 906       if(status & RFD_OK) /* frame received without error? */
 907       {
 908         if( (totlen = rbd->status) & RBD_LAST) /* the first and the last buffer? */
 909         {
 910           totlen &= RBD_MASK; /* length of this frame */
 911           rbd->status = 0;
 912           skb = (struct sk_buff *) dev_alloc_skb(totlen+2);
 913           if(skb != NULL)
 914           {
 915             skb->dev = dev;
 916             skb_reserve(skb,2);
 917             skb_put(skb,totlen);
 918             eth_copy_and_sum(skb,(char *) p->base+(unsigned long) rbd->buffer,totlen,0);
 919             skb->protocol=eth_type_trans(skb,dev);
 920             netif_rx(skb);
 921             p->stats.rx_packets++;
 922           }
 923           else
 924             p->stats.rx_dropped++;
 925         }
 926         else
 927         {
 928           int rstat;
 929              /* free all RBD's until RBD_LAST is set */
 930           totlen = 0;
 931           while(!((rstat=rbd->status) & RBD_LAST))
 932           {
 933             totlen += rstat & RBD_MASK;
 934             if(!rstat)
 935             {
 936               printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
 937               break;
 938             }
 939             rbd->status = 0;
 940             rbd = (struct rbd_struct *) make32(rbd->next);
 941           }
 942           totlen += rstat & RBD_MASK;
 943           rbd->status = 0;
 944           printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
 945           p->stats.rx_dropped++;
 946        }
 947       }
 948       else /* frame !(ok), only with 'save-bad-frames' */
 949       {
 950         printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
 951         p->stats.rx_errors++;
 952       }
 953       p->rfd_top->stat_high = 0;
 954       p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
 955       p->rfd_top->rbd_offset = 0xffff;
 956       p->rfd_last->last = 0;        /* delete RFD_SUSP  */
 957       p->rfd_last = p->rfd_top;
 958       p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
 959       p->scb->rfa_offset = make16(p->rfd_top);
 960 
 961       if(debuglevel > 0)
 962         printk("%d",cnt++);
 963   }
 964 
 965   if(automatic_resume)
 966   {
 967     WAIT_4_SCB_CMD();
 968     p->scb->cmd_ruc = RUC_RESUME;
 969     ni_attn586();
 970     WAIT_4_SCB_CMD_RUC();
 971   }
 972 
 973 #ifdef WAIT_4_BUSY
 974   {
 975     int i;
 976     for(i=0;i<1024;i++)
 977     {
 978       if(p->rfd_top->status)
 979         break;
 980       DELAY_16();
 981       if(i == 1023)
 982         printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
 983     }
 984   }
 985 #endif
 986 
 987 #ifdef 0
 988   if(!at_least_one)
 989   { 
 990     int i;
 991     volatile struct rfd_struct *rfds=p->rfd_top;
 992     volatile struct rbd_struct *rbds;
 993     printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
 994     for(i=0;i< (p->num_recv_buffs+4);i++)
 995     {
 996       rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
 997       printk("%04x:%04x ",rfds->status,rbds->status);
 998       rfds = (struct rfd_struct *) make32(rfds->next);
 999     }
1000     printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
1001     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);  
1002   }
1003   old_at_least = at_least_one;
1004 #endif
1005 
1006   if(debuglevel > 0)
1007     printk("r");
1008 }
1009 
1010 /**********************************************************
1011  * handle 'Receiver went not ready'.
1012  */
1013 
1014 static void ni52_rnr_int(struct device *dev)
     /*  */
1015 {
1016   struct priv *p = (struct priv *) dev->priv;
1017 
1018   p->stats.rx_errors++;
1019 
1020   WAIT_4_SCB_CMD();    /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1021   p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
1022   ni_attn586(); 
1023   WAIT_4_SCB_CMD_RUC();    /* wait for accept cmd. */
1024 
1025   alloc_rfa(dev,(char *)p->rfd_first);
1026 /* maybe add a check here, before restarting the RU */
1027   startrecv586(dev); /* restart RU */
1028 
1029   printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
1030 
1031 }
1032 
1033 /**********************************************************
1034  * handle xmit - interrupt
1035  */
1036 
1037 static void ni52_xmt_int(struct device *dev)
     /*  */
1038 {
1039   int status;
1040   struct priv *p = (struct priv *) dev->priv;
1041 
1042   if(debuglevel > 0)
1043     printk("X");
1044 
1045   status = p->xmit_cmds[p->xmit_last]->cmd_status;
1046   if(!(status & STAT_COMPL))
1047     printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
1048 
1049   if(status & STAT_OK)
1050   {
1051     p->stats.tx_packets++;
1052     p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1053   }
1054   else 
1055   {
1056     p->stats.tx_errors++;
1057     if(status & TCMD_LATECOLL) {
1058       printk("%s: late collision detected.\n",dev->name);
1059       p->stats.collisions++;
1060     } 
1061     else if(status & TCMD_NOCARRIER) {
1062       p->stats.tx_carrier_errors++;
1063       printk("%s: no carrier detected.\n",dev->name);
1064     } 
1065     else if(status & TCMD_LOSTCTS) 
1066       printk("%s: loss of CTS detected.\n",dev->name);
1067     else if(status & TCMD_UNDERRUN) {
1068       p->stats.tx_fifo_errors++;
1069       printk("%s: DMA underrun detected.\n",dev->name);
1070     }
1071     else if(status & TCMD_MAXCOLL) {
1072       printk("%s: Max. collisions exceeded.\n",dev->name);
1073       p->stats.collisions += 16;
1074     } 
1075   }
1076 
1077 #if (NUM_XMIT_BUFFS > 1)
1078   if( (++p->xmit_last) == NUM_XMIT_BUFFS) 
1079     p->xmit_last = 0;
1080 #endif
1081 
1082   dev->tbusy = 0;
1083   mark_bh(NET_BH);
1084 }
1085 
1086 /***********************************************************
1087  * (re)start the receiver
1088  */ 
1089 
1090 static void startrecv586(struct device *dev)
     /*  */
1091 {
1092   struct priv *p = (struct priv *) dev->priv;
1093 
1094   WAIT_4_SCB_CMD();
1095   WAIT_4_SCB_CMD_RUC();
1096   p->scb->rfa_offset = make16(p->rfd_first);
1097   p->scb->cmd_ruc = RUC_START;
1098   ni_attn586();         /* start cmd. */
1099   WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */
1100 }
1101 
1102 /******************************************************
1103  * send frame 
1104  */
1105 
1106 static int ni52_send_packet(struct sk_buff *skb, struct device *dev)
     /*  */
1107 {
1108   int len,i;
1109 #ifndef NO_NOPCOMMANDS
1110   int next_nop;
1111 #endif
1112   struct priv *p = (struct priv *) dev->priv;
1113 
1114   if(dev->tbusy)
1115   {
1116     int tickssofar = jiffies - dev->trans_start;
1117     if (tickssofar < 5)
1118       return 1;
1119 
1120 #ifndef NO_NOPCOMMANDS
1121     if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
1122     {
1123       dev->tbusy = 0;
1124 #ifdef DEBUG
1125       printk("%s: strange ... timeout with CU active?!?\n",dev->name);
1126       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);
1127 #endif
1128       p->scb->cmd_cuc = CUC_ABORT;
1129       ni_attn586();
1130       WAIT_4_SCB_CMD();
1131       p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
1132       p->scb->cmd_cuc = CUC_START;
1133       ni_attn586();
1134       WAIT_4_SCB_CMD();
1135       dev->trans_start = jiffies;
1136       return 0;
1137     }
1138     else
1139 #endif
1140     {
1141 #ifdef DEBUG
1142       printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
1143       printk("%s: command-stats: %04x %04x\n",dev->name,p->xmit_cmds[0]->cmd_status,p->xmit_cmds[1]->cmd_status);
1144       printk("%s: check, whether you set the right interrupt number!\n",dev->name);
1145 #endif
1146       ni52_close(dev);
1147       ni52_open(dev);
1148     }
1149     dev->trans_start = jiffies;
1150     return 0;
1151   }
1152 
1153   if(skb == NULL)
1154   {
1155     dev_tint(dev);
1156     return 0;
1157   }
1158 
1159   if (skb->len <= 0)
1160     return 0;
1161   if(skb->len > XMIT_BUFF_SIZE)
1162   {
1163     printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %ld bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
1164     return 0;
1165   }
1166 
1167   if (set_bit(0, (void*)&dev->tbusy)) {
1168     printk("%s: Transmitter access conflict.\n", dev->name);
1169     return 1;
1170   }
1171 #if(NUM_XMIT_BUFFS > 1)
1172   else if(set_bit(0,(void *) &p->lock)) {
1173     printk("%s: Queue was locked\n",dev->name);
1174     return 1;
1175   }
1176 #endif
1177   else
1178   {
1179     memcpy((char *)p->xmit_cbuffs[p->xmit_count],(char *)(skb->data),skb->len);
1180     len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
1181 
1182 #if (NUM_XMIT_BUFFS == 1)
1183 #  ifdef NO_NOPCOMMANDS
1184 
1185 #ifdef DEBUG
1186     if(p->scb->cus & CU_ACTIVE)
1187     {
1188       printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
1189       printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,p->xmit_cmds[0]->cmd_status);
1190     }
1191 #endif
1192 
1193     p->xmit_buffs[0]->size = TBD_LAST | len;
1194     for(i=0;i<16;i++)
1195     {
1196       p->xmit_cmds[0]->cmd_status = 0;
1197       WAIT_4_SCB_CMD();
1198       if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
1199         p->scb->cmd_cuc = CUC_RESUME;
1200       else
1201       {
1202         p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1203         p->scb->cmd_cuc = CUC_START;
1204       }
1205 
1206       ni_attn586();
1207       dev->trans_start = jiffies;
1208       if(!i)
1209         dev_kfree_skb(skb,FREE_WRITE);
1210       WAIT_4_SCB_CMD();
1211       if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
1212         break;
1213       if(p->xmit_cmds[0]->cmd_status)
1214         break;
1215       if(i==15)
1216         printk("%s: Can't start transmit-command.\n",dev->name);
1217     }
1218 #  else
1219     next_nop = (p->nop_point + 1) & 0x1;
1220     p->xmit_buffs[0]->size = TBD_LAST | len;
1221 
1222     p->xmit_cmds[0]->cmd_link   = p->nop_cmds[next_nop]->cmd_link 
1223                                 = make16((p->nop_cmds[next_nop]));
1224     p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1225 
1226     p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1227     dev->trans_start = jiffies;
1228     p->nop_point = next_nop;
1229     dev_kfree_skb(skb,FREE_WRITE);
1230 #  endif
1231 #else
1232     p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
1233     if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS ) 
1234       next_nop = 0;
1235 
1236     p->xmit_cmds[p->xmit_count]->cmd_status  = 0;
1237         /* linkpointer of xmit-command already points to next nop cmd */
1238     p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
1239     p->nop_cmds[next_nop]->cmd_status = 0;
1240 
1241     p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1242     dev->trans_start = jiffies;
1243     p->xmit_count = next_nop;
1244  
1245     {
1246       long flags; 
1247       save_flags(flags);
1248       cli();
1249       if(p->xmit_count != p->xmit_last)
1250         dev->tbusy = 0;
1251       p->lock = 0;
1252       restore_flags(flags);
1253     }
1254     dev_kfree_skb(skb,FREE_WRITE);
1255 #endif
1256   }
1257   return 0;
1258 }
1259 
1260 /*******************************************
1261  * Someone wanna have the statistics 
1262  */
1263 
1264 static struct enet_statistics *ni52_get_stats(struct device *dev)
     /*  */
1265 {
1266   struct priv *p = (struct priv *) dev->priv;
1267   unsigned short crc,aln,rsc,ovrn;
1268 
1269   crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
1270   p->scb->crc_errs = 0;
1271   aln = p->scb->aln_errs;
1272   p->scb->aln_errs = 0;
1273   rsc = p->scb->rsc_errs;
1274   p->scb->rsc_errs = 0;
1275   ovrn = p->scb->ovrn_errs;
1276   p->scb->ovrn_errs = 0;
1277 
1278   p->stats.rx_crc_errors += crc;
1279   p->stats.rx_fifo_errors += ovrn;
1280   p->stats.rx_frame_errors += aln;
1281   p->stats.rx_dropped += rsc;
1282 
1283   return &p->stats;
1284 }
1285 
1286 /********************************************************
1287  * Set MC list ..  
1288  */
1289 static void set_multicast_list(struct device *dev)
     /*  */
1290 {
1291   if(!dev->start)
1292   {
1293     printk("%s: Can't apply promiscuous/multicastmode to a not running interface.\n",dev->name);
1294     return;
1295   }
1296 
1297   dev->start = 0;
1298 
1299   ni_disint();
1300   alloc586(dev);
1301   init586(dev);  
1302   startrecv586(dev);
1303   ni_enaint();
1304 
1305   dev->start = 1;
1306 }
1307 
1308 #ifdef MODULE
1309 static struct device dev_ni52 = {
1310   "        ",  /* "ni5210": device name inserted by net_init.c */
1311   0, 0, 0, 0,
1312   0x300, 9,   /* I/O address, IRQ */
1313   0, 0, 0, NULL, ni52_probe };
1314 
1315 /* set: io,irq,memstart,memend or set it when calling insmod */
1316 int irq=9;
1317 int io=0x300;
1318 long memstart=0; /* e.g 0xd0000 */
1319 long memend=0;   /* e.g 0xd4000 */
1320 
1321 int init_module(void)
     /*  */
1322 {
1323   if(io <= 0x0 || !memend || !memstart || irq < 2) {
1324     printk("ni52: Autoprobing not allowed for modules.\nni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1325     return -ENODEV;
1326   }
1327   dev_ni52.irq = irq;
1328   dev_ni52.base_addr = io;
1329   dev_ni52.mem_end = memend;
1330   dev_ni52.mem_start = memstart;
1331   if (register_netdev(&dev_ni52) != 0)
1332     return -EIO;
1333   return 0;
1334 }
1335 
1336 void cleanup_module(void)
     /*  */
1337 {
1338   release_region(dev_ni52.base_addr, NI52_TOTAL_SIZE);
1339   kfree(dev_ni52.priv);
1340   dev_ni52.priv = NULL;
1341   unregister_netdev(&dev_ni52);
1342 }
1343 #endif /* MODULE */
1344 
1345 #if 0
1346 /*
1347  * DUMP .. we expect a not running CMD unit and enough space
1348  */
1349 void ni52_dump(struct device *dev,void *ptr)
     /*  */
1350 {
1351   struct priv *p = (struct priv *) dev->priv;
1352   struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
1353   int i;
1354 
1355   p->scb->cmd_cuc = CUC_ABORT;
1356   ni_attn586();
1357   WAIT_4_SCB_CMD();
1358   WAIT_4_SCB_CMD_RUC();
1359 
1360   dump_cmd->cmd_status = 0;
1361   dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
1362   dump_cmd->dump_offset = make16((dump_cmd + 1));
1363   dump_cmd->cmd_link = 0xffff;
1364 
1365   p->scb->cbl_offset = make16(dump_cmd);
1366   p->scb->cmd_cuc = CUC_START;
1367   ni_attn586();
1368   WAIT_4_STAT_COMPL(dump_cmd);
1369 
1370   if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
1371         printk("%s: Can't get dump information.\n",dev->name);
1372 
1373   for(i=0;i<170;i++) {
1374     printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);
1375     if(i % 24 == 23)
1376       printk("\n");
1377   }
1378   printk("\n");
1379 }
1380 #endif
1381 
1382 /*
1383  * END: linux/drivers/net/ni52.c 
1384  */
1385 
1386
/* */
root/drivers/net/ni52.c

DEFINITIONS
