err.no Git - linux-2.6/blob - drivers/net/ni52.c

   1 /*
   2  * net-3-driver for the NI5210 card (i82586 Ethernet chip)
   3  *
   4  * This is an extension to the Linux operating system, and is covered by the
   5  * same GNU General Public License that covers that work.
   6  *
   7  * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
   8  * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
   9  *    [feel free to mail ....]
  10  *
  11  * when using as module: (no autoprobing!)
  12  *   compile with:
  13  *       gcc -O2 -fomit-frame-pointer -m486 -D__KERNEL__ -DMODULE -c ni52.c
  14  *   run with e.g:
  15  *       insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000
  16  *
  17  * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!.
  18  *
  19  * If you find a bug, please report me:
  20  *   The kernel panic output and any kmsg from the ni52 driver
  21  *   the ni5210-driver-version and the linux-kernel version
  22  *   how many shared memory (memsize) on the netcard,
  23  *   bootprom: yes/no, base_addr, mem_start
  24  *   maybe the ni5210-card revision and the i82586 version
  25  *
  26  * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340
  27  *                mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000,
  28  *                           0xd8000,0xcc000,0xce000,0xda000,0xdc000
  29  *
  30  * sources:
  31  *   skeleton.c from Donald Becker
  32  *
  33  * I have also done a look in the following sources: (mail me if you need them)
  34  *   crynwr-packet-driver by Russ Nelson
  35  *   Garret A. Wollman's (fourth) i82586-driver for BSD
  36  *   (before getting an i82596 (yes 596 not 586) manual, the existing drivers
  37  *    helped me a lot to understand this tricky chip.)
  38  *
  39  * Known Problems:
  40  *   The internal sysbus seems to be slow. So we often lose packets because of
  41  *   overruns while receiving from a fast remote host.
  42  *   This can slow down TCP connections. Maybe the newer ni5210 cards are
  43  *   better. My experience is, that if a machine sends with more than about
  44  *   500-600K/s the fifo/sysbus overflows.
  45  *
  46  * IMPORTANT NOTE:
  47  *   On fast networks, it's a (very) good idea to have 16K shared memory. With
  48  *   8K, we can store only 4 receive frames, so it can (easily) happen that a
  49  *   remote machine 'overruns' our system.
  50  *
  51  * Known i82586/card problems (I'm sure, there are many more!):
  52  *   Running the NOP-mode, the i82586 sometimes seems to forget to report
  53  *   every xmit-interrupt until we restart the CU.
  54  *   Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit
  55  *   in the RBD-Struct which indicates an end of the RBD queue.
  56  *   Instead, the RU fetches another (randomly selected and
  57  *   usually used) RBD and begins to fill it. (Maybe, this happens only if
  58  *   the last buffer from the previous RFD fits exact into the queue and
  59  *   the next RFD can't fetch an initial RBD. Anyone knows more? )
  60  *
  61  * results from ftp performance tests with Linux 1.2.5
  62  *   send and receive about 350-400 KByte/s (peak up to 460 kbytes/s)
  63  *   sending in NOP-mode: peak performance up to 530K/s (but better don't
  64  *   run this mode)
  65  */
  66
  67 /*
  68  * 29.Sept.96: virt_to_bus changes for new memory scheme
  69  * 19.Feb.96: more Mcast changes, module support (MH)
  70  *
  71  * 18.Nov.95: Mcast changes (AC).
  72  *
  73  * 23.April.95: fixed(?) receiving problems by configuring a RFD more
  74  *              than the number of RBD's. Can maybe cause other problems.
  75  * 18.April.95: Added MODULE support (MH)
  76  * 17.April.95: MC related changes in init586() and set_multicast_list().
  77  *              removed use of 'jiffies' in init586() (MH)
  78  *
  79  * 19.Sep.94: Added Multicast support (not tested yet) (MH)
  80  *
  81  * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling.
  82  *            Now, every RFD has exact one RBD. (MH)
  83  *
  84  * 14.Sep.94: added promiscuous mode, a few cleanups (MH)
  85  *
  86  * 19.Aug.94: changed request_irq() parameter (MH)
  87  *
  88  * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)
  89  *
  90  * 19.July.94: lotsa cleanups .. (MH)
  91  *
  92  * 17.July.94: some patches ... verified to run with 1.1.29 (MH)
  93  *
  94  * 4.July.94: patches for Linux 1.1.24  (MH)
  95  *
  96  * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)
  97  *
  98  * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff,
  99  *                              too (MH)
 100  *
 101  * < 30.Sep.93: first versions
 102  */
 103
 104 static int debuglevel;  /* debug-printk 0: off 1: a few 2: more */
 105 static int automatic_resume; /* experimental .. better should be zero */
 106 static int rfdadd;      /* rfdadd=1 may be better for 8K MEM cards */
 107 static int fifo = 0x8;  /* don't change */
 108
 109 #include <linux/module.h>
 110 #include <linux/kernel.h>
 111 #include <linux/string.h>
 112 #include <linux/errno.h>
 113 #include <linux/ioport.h>
 114 #include <linux/slab.h>
 115 #include <linux/interrupt.h>
 116 #include <linux/delay.h>
 117 #include <linux/init.h>
 118 #include <linux/bitops.h>
 119 #include <asm/io.h>
 120
 121 #include <linux/netdevice.h>
 122 #include <linux/etherdevice.h>
 123 #include <linux/skbuff.h>
 124
 125 #include "ni52.h"
 126
 127 #define DRV_NAME "ni52"
 128
 129 #define DEBUG       /* debug on */
 130 #define SYSBUSVAL 1 /* 8 Bit */
 131
 132 #define ni_attn586()  { outb(0, dev->base_addr + NI52_ATTENTION); }
 133 #define ni_reset586() { outb(0, dev->base_addr + NI52_RESET); }
 134 #define ni_disint()   { outb(0, dev->base_addr + NI52_INTDIS); }
 135 #define ni_enaint()   { outb(0, dev->base_addr + NI52_INTENA); }
 136
 137 #define make32(ptr16) (p->memtop + (short) (ptr16))
 138 #define make24(ptr32) ((unsigned long)(ptr32)) - p->base
 139 #define make16(ptr32) ((unsigned short) ((unsigned long)(ptr32)\
 140                                         - (unsigned long) p->memtop))
 141
 142 /******************* how to calculate the buffers *****************************
 143
 144   * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
 145   * --------------- in a different (more stable?) mode. Only in this mode it's
 146   *                 possible to configure the driver with 'NO_NOPCOMMANDS'
 147
 148 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
 149 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
 150 sizeof(rfd) = 24; sizeof(rbd) = 12;
 151 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
 152 sizeof(nop_cmd) = 8;
 153
 154   * if you don't know the driver, better do not change these values: */
 155
 156 #define RECV_BUFF_SIZE 1524 /* slightly oversized */
 157 #define XMIT_BUFF_SIZE 1524 /* slightly oversized */
 158 #define NUM_XMIT_BUFFS 1    /* config for both, 8K and 16K shmem */
 159 #define NUM_RECV_BUFFS_8  4 /* config for 8K shared mem */
 160 #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
 161 #define NO_NOPCOMMANDS      /* only possible with NUM_XMIT_BUFFS=1 */
 162
 163 /**************************************************************************/
 164
 165
 166 #define NI52_TOTAL_SIZE 16
 167 #define NI52_ADDR0 0x02
 168 #define NI52_ADDR1 0x07
 169 #define NI52_ADDR2 0x01
 170
 171 static int     ni52_probe1(struct net_device *dev, int ioaddr);
 172 static irqreturn_t ni52_interrupt(int irq, void *dev_id);
 173 static int     ni52_open(struct net_device *dev);
 174 static int     ni52_close(struct net_device *dev);
 175 static int     ni52_send_packet(struct sk_buff *, struct net_device *);
 176 static struct  net_device_stats *ni52_get_stats(struct net_device *dev);
 177 static void    set_multicast_list(struct net_device *dev);
 178 static void    ni52_timeout(struct net_device *dev);
 179
 180 /* helper-functions */
 181 static int     init586(struct net_device *dev);
 182 static int     check586(struct net_device *dev, char *where, unsigned size);
 183 static void    alloc586(struct net_device *dev);
 184 static void    startrecv586(struct net_device *dev);
 185 static void   __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr);
 186 static void    ni52_rcv_int(struct net_device *dev);
 187 static void    ni52_xmt_int(struct net_device *dev);
 188 static void    ni52_rnr_int(struct net_device *dev);
 189
 190 struct priv {
 191         struct net_device_stats stats;
 192         unsigned long base;
 193         char __iomem *memtop;
 194         spinlock_t spinlock;
 195         int reset;
 196         struct rfd_struct __iomem *rfd_last, *rfd_top, *rfd_first;
 197         struct scp_struct __iomem *scp;
 198         struct iscp_struct __iomem *iscp;
 199         struct scb_struct __iomem *scb;
 200         struct tbd_struct __iomem *xmit_buffs[NUM_XMIT_BUFFS];
 201 #if (NUM_XMIT_BUFFS == 1)
 202         struct transmit_cmd_struct __iomem *xmit_cmds[2];
 203         struct nop_cmd_struct __iomem *nop_cmds[2];
 204 #else
 205         struct transmit_cmd_struct __iomem *xmit_cmds[NUM_XMIT_BUFFS];
 206         struct nop_cmd_struct __iomem *nop_cmds[NUM_XMIT_BUFFS];
 207 #endif
 208         int nop_point, num_recv_buffs;
 209         char __iomem *xmit_cbuffs[NUM_XMIT_BUFFS];
 210         int xmit_count, xmit_last;
 211 };
 212
 213 /* wait for command with timeout: */
 214 static void wait_for_scb_cmd(struct net_device *dev)
 215 {
 216         struct priv *p = dev->priv;
 217         int i;
 218         for (i = 0; i < 16384; i++) {
 219                 if (readb(&p->scb->cmd_cuc) == 0)
 220                       break;
 221                 udelay(4);
 222                 if (i == 16383) {
 223                         printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",
 224                                 dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus));
 225                         if (!p->reset) {
 226                                 p->reset = 1;
 227                                 ni_reset586();
 228                         }
 229                 }
 230         }
 231 }
 232
 233 static void wait_for_scb_cmd_ruc(struct net_device *dev)
 234 {
 235         struct priv *p = dev->priv;
 236         int i;
 237         for (i = 0; i < 16384; i++) {
 238                 if (readb(&p->scb->cmd_ruc) == 0)
 239                         break;
 240                 udelay(4);
 241                 if (i == 16383) {
 242                         printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",
 243                                 dev->name, p->scb->cmd_ruc, p->scb->rus);
 244                         if (!p->reset) {
 245                                 p->reset = 1;
 246                                 ni_reset586();
 247                         }
 248                 }
 249         }
 250 }
 251
 252 static void wait_for_stat_compl(void __iomem *p)
 253 {
 254         struct nop_cmd_struct __iomem *addr = p;
 255         int i;
 256         for (i = 0; i < 32767; i++) {
 257                 if (readw(&((addr)->cmd_status)) & STAT_COMPL)
 258                         break;
 259                 udelay(32);
 260         }
 261 }
 262
 263 /**********************************************
 264  * close device
 265  */
 266 static int ni52_close(struct net_device *dev)
 267 {
 268         free_irq(dev->irq, dev);
 269         ni_reset586(); /* the hard way to stop the receiver */
 270         netif_stop_queue(dev);
 271         return 0;
 272 }
 273
 274 /**********************************************
 275  * open device
 276  */
 277 static int ni52_open(struct net_device *dev)
 278 {
 279         int ret;
 280
 281         ni_disint();
 282         alloc586(dev);
 283         init586(dev);
 284         startrecv586(dev);
 285         ni_enaint();
 286
 287         ret = request_irq(dev->irq, &ni52_interrupt, 0, dev->name, dev);
 288         if (ret) {
 289                 ni_reset586();
 290                 return ret;
 291         }
 292         netif_start_queue(dev);
 293         return 0; /* most done by init */
 294 }
 295
 296 /**********************************************
 297  * Check to see if there's an 82586 out there.
 298  */
 299 static int check586(struct net_device *dev, char *where, unsigned size)
 300 {
 301         struct priv pb;
 302         struct priv *p = /* (struct priv *) dev->priv*/ &pb;
 303         char __iomem *iscp_addrs[2];
 304         int i;
 305
 306         p->base = (unsigned long) isa_bus_to_virt((unsigned long)where)
 307                                                         + size - 0x01000000;
 308         p->memtop = (char __iomem *)isa_bus_to_virt((unsigned long)where) + size;
 309         p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
 310         memset_io(p->scp, 0, sizeof(struct scp_struct));
 311         for (i = 0; i < sizeof(struct scp_struct); i++)
 312                 /* memory was writeable? */
 313                 if (readb((char __iomem *)p->scp + i))
 314                         return 0;
 315         writeb(SYSBUSVAL, &p->scp->sysbus);     /* 1 = 8Bit-Bus, 0 = 16 Bit */
 316         if (readb(&p->scp->sysbus) != SYSBUSVAL)
 317                 return 0;
 318
 319         iscp_addrs[0] = (char __iomem *)isa_bus_to_virt((unsigned long)where);
 320         iscp_addrs[1] = (char __iomem *)p->scp - sizeof(struct iscp_struct);
 321
 322         for (i = 0; i < 2; i++) {
 323                 p->iscp = (struct iscp_struct __iomem *) iscp_addrs[i];
 324                 memset_io(p->iscp, 0, sizeof(struct iscp_struct));
 325
 326                 writel(make24(p->iscp), &p->scp->iscp);
 327                 writeb(1, &p->iscp->busy);
 328
 329                 ni_reset586();
 330                 ni_attn586();
 331                 mdelay(32);     /* wait a while... */
 332                 /* i82586 clears 'busy' after successful init */
 333                 if (readb(&p->iscp->busy))
 334                         return 0;
 335         }
 336         return 1;
 337 }
 338
 339 /******************************************************************
 340  * set iscp at the right place, called by ni52_probe1 and open586.
 341  */
 342 static void alloc586(struct net_device *dev)
 343 {
 344         struct priv *p =        (struct priv *) dev->priv;
 345
 346         ni_reset586();
 347         mdelay(32);
 348
 349         spin_lock_init(&p->spinlock);
 350
 351         p->scp  = (struct scp_struct __iomem *) (p->base + SCP_DEFAULT_ADDRESS);
 352         p->scb  = (struct scb_struct __iomem *) isa_bus_to_virt(dev->mem_start);
 353         p->iscp = (struct iscp_struct __iomem *)
 354                         ((char __iomem *)p->scp - sizeof(struct iscp_struct));
 355
 356         memset_io(p->iscp, 0, sizeof(struct iscp_struct));
 357         memset_io(p->scp , 0, sizeof(struct scp_struct));
 358
 359         writel(make24(p->iscp), &p->scp->iscp);
 360         writeb(SYSBUSVAL, &p->scp->sysbus);
 361         writew(make16(p->scb), &p->iscp->scb_offset);
 362
 363         writeb(1, &p->iscp->busy);
 364         ni_reset586();
 365         ni_attn586();
 366
 367         mdelay(32);
 368
 369         if (readb(&p->iscp->busy))
 370                 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
 371
 372         p->reset = 0;
 373
 374         memset_io(p->scb, 0, sizeof(struct scb_struct));
 375 }
 376
 377 /* set: io,irq,memstart,memend or set it when calling insmod */
 378 static int irq = 9;
 379 static int io = 0x300;
 380 static long memstart;   /* e.g 0xd0000 */
 381 static long memend;     /* e.g 0xd4000 */
 382
 383 /**********************************************
 384  * probe the ni5210-card
 385  */
 386 struct net_device * __init ni52_probe(int unit)
 387 {
 388         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
 389         static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
 390         int *port;
 391         int err = 0;
 392
 393         if (!dev)
 394                 return ERR_PTR(-ENOMEM);
 395
 396         if (unit >= 0) {
 397                 sprintf(dev->name, "eth%d", unit);
 398                 netdev_boot_setup_check(dev);
 399                 io = dev->base_addr;
 400                 irq = dev->irq;
 401                 memstart = dev->mem_start;
 402                 memend = dev->mem_end;
 403         }
 404
 405         if (io > 0x1ff) {       /* Check a single specified location. */
 406                 err = ni52_probe1(dev, io);
 407         } else if (io > 0) {            /* Don't probe at all. */
 408                 err = -ENXIO;
 409         } else {
 410                 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
 411                         ;
 412                 if (*port)
 413                         goto got_it;
 414 #ifdef FULL_IO_PROBE
 415                 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
 416                         ;
 417                 if (io < 0x400)
 418                         goto got_it;
 419 #endif
 420                 err = -ENODEV;
 421         }
 422         if (err)
 423                 goto out;
 424 got_it:
 425         err = register_netdev(dev);
 426         if (err)
 427                 goto out1;
 428         return dev;
 429 out1:
 430         release_region(dev->base_addr, NI52_TOTAL_SIZE);
 431 out:
 432         free_netdev(dev);
 433         return ERR_PTR(err);
 434 }
 435
 436 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
 437 {
 438         int i, size, retval;
 439
 440         dev->base_addr = ioaddr;
 441         dev->irq = irq;
 442         dev->mem_start = memstart;
 443         dev->mem_end = memend;
 444
 445         if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
 446                 return -EBUSY;
 447
 448         if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
 449             !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
 450                 retval = -ENODEV;
 451                 goto out;
 452         }
 453
 454         for (i = 0; i < ETH_ALEN; i++)
 455                 dev->dev_addr[i] = inb(dev->base_addr+i);
 456
 457         if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
 458                  || dev->dev_addr[2] != NI52_ADDR2) {
 459                 retval = -ENODEV;
 460                 goto out;
 461         }
 462
 463         printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
 464                                 dev->name, dev->base_addr);
 465
 466         /*
 467          * check (or search) IO-Memory, 8K and 16K
 468          */
 469 #ifdef MODULE
 470         size = dev->mem_end - dev->mem_start;
 471         if (size != 0x2000 && size != 0x4000) {
 472                 printk("\n");
 473                 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
 474                 retval = -ENODEV;
 475                 goto out;
 476         }
 477         if (!check586(dev, (char *)dev->mem_start, size)) {
 478                 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
 479                 retval = -ENODEV;
 480                 goto out;
 481         }
 482 #else
 483         if (dev->mem_start != 0) {
 484                 /* no auto-mem-probe */
 485                 size = 0x4000; /* check for 16K mem */
 486                 if (!check586(dev, (char *) dev->mem_start, size)) {
 487                         size = 0x2000; /* check for 8K mem */
 488                         if (!check586(dev, (char *)dev->mem_start, size)) {
 489                                 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
 490                                 retval = -ENODEV;
 491                                 goto out;
 492                         }
 493                 }
 494         } else {
 495                 static const unsigned long memaddrs[] = {
 496                         0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
 497                         0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
 498                 };
 499                 for (i = 0;; i++) {
 500                         if (!memaddrs[i]) {
 501                                 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
 502                                 retval = -ENODEV;
 503                                 goto out;
 504                         }
 505                         dev->mem_start = memaddrs[i];
 506                         size = 0x2000; /* check for 8K mem */
 507                         if (check586(dev, (char *)dev->mem_start, size))
 508                                 /* 8K-check */
 509                                 break;
 510                         size = 0x4000; /* check for 16K mem */
 511                         if (check586(dev, (char *)dev->mem_start, size))
 512                                 /* 16K-check */
 513                                 break;
 514                 }
 515         }
 516         /* set mem_end showed by 'ifconfig' */
 517         dev->mem_end = dev->mem_start + size;
 518 #endif
 519
 520         memset((char *)dev->priv, 0, sizeof(struct priv));
 521
 522         ((struct priv *)(dev->priv))->memtop =
 523                                 (char __iomem *)isa_bus_to_virt(dev->mem_start) + size;
 524         ((struct priv *)(dev->priv))->base =  (unsigned long)
 525                         isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
 526         alloc586(dev);
 527
 528         /* set number of receive-buffs according to memsize */
 529         if (size == 0x2000)
 530                 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_8;
 531         else
 532                 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_16;
 533
 534         printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
 535                                 dev->mem_start, size);
 536
 537         if (dev->irq < 2) {
 538                 unsigned long irq_mask;
 539
 540                 irq_mask = probe_irq_on();
 541                 ni_reset586();
 542                 ni_attn586();
 543
 544                 mdelay(20);
 545                 dev->irq = probe_irq_off(irq_mask);
 546                 if (!dev->irq) {
 547                         printk("?autoirq, Failed to detect IRQ line!\n");
 548                         retval = -EAGAIN;
 549                         goto out;
 550                 }
 551                 printk("IRQ %d (autodetected).\n", dev->irq);
 552         } else {
 553                 if (dev->irq == 2)
 554                         dev->irq = 9;
 555                 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
 556         }
 557
 558         dev->open               = ni52_open;
 559         dev->stop               = ni52_close;
 560         dev->get_stats          = ni52_get_stats;
 561         dev->tx_timeout         = ni52_timeout;
 562         dev->watchdog_timeo     = HZ/20;
 563         dev->hard_start_xmit    = ni52_send_packet;
 564         dev->set_multicast_list = set_multicast_list;
 565
 566         dev->if_port            = 0;
 567
 568         return 0;
 569 out:
 570         release_region(ioaddr, NI52_TOTAL_SIZE);
 571         return retval;
 572 }
 573
 574 /**********************************************
 575  * init the chip (ni52-interrupt should be disabled?!)
 576  * needs a correct 'allocated' memory
 577  */
 578
 579 static int init586(struct net_device *dev)
 580 {
 581         void __iomem *ptr;
 582         int i, result = 0;
 583         struct priv *p = (struct priv *)dev->priv;
 584         struct configure_cmd_struct __iomem *cfg_cmd;
 585         struct iasetup_cmd_struct __iomem *ias_cmd;
 586         struct tdr_cmd_struct __iomem *tdr_cmd;
 587         struct mcsetup_cmd_struct __iomem *mc_cmd;
 588         struct dev_mc_list *dmi = dev->mc_list;
 589         int num_addrs = dev->mc_count;
 590
 591         ptr = p->scb + 1;
 592
 593         cfg_cmd = ptr; /* configure-command */
 594         writew(0, &cfg_cmd->cmd_status);
 595         writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
 596         writew(0xFFFF, &cfg_cmd->cmd_link);
 597
 598         /* number of cfg bytes */
 599         writeb(0x0a, &cfg_cmd->byte_cnt);
 600         /* fifo-limit (8=tx:32/rx:64) */
 601         writeb(fifo, &cfg_cmd->fifo);
 602         /* hold or discard bad recv frames (bit 7) */
 603         writeb(0x40, &cfg_cmd->sav_bf);
 604         /* addr_len |!src_insert |pre-len |loopback */
 605         writeb(0x2e, &cfg_cmd->adr_len);
 606         writeb(0x00, &cfg_cmd->priority);
 607         writeb(0x60, &cfg_cmd->ifs);;
 608         writeb(0x00, &cfg_cmd->time_low);
 609         writeb(0xf2, &cfg_cmd->time_high);
 610         writeb(0x00, &cfg_cmd->promisc);;
 611         if (dev->flags & IFF_ALLMULTI) {
 612                 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
 613                 if (num_addrs > len) {
 614                         printk(KERN_ERR "%s: switching to promisc. mode\n",
 615                                 dev->name);
 616                         dev->flags |= IFF_PROMISC;
 617                 }
 618         }
 619         if (dev->flags & IFF_PROMISC)
 620                 writeb(0x01, &cfg_cmd->promisc);
 621         writeb(0x00, &cfg_cmd->carr_coll);
 622         writew(make16(cfg_cmd), &p->scb->cbl_offset);
 623         writew(0, &p->scb->cmd_ruc);
 624
 625         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 626         ni_attn586();
 627
 628         wait_for_stat_compl(cfg_cmd);
 629
 630         if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 631                                                         (STAT_COMPL|STAT_OK)) {
 632                 printk(KERN_ERR "%s: configure command failed: %x\n",
 633                                 dev->name, readw(&cfg_cmd->cmd_status));
 634                 return 1;
 635         }
 636
 637         /*
 638          * individual address setup
 639          */
 640
 641         ias_cmd = ptr;
 642
 643         writew(0, &ias_cmd->cmd_status);
 644         writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
 645         writew(0xffff, &ias_cmd->cmd_link);
 646
 647         memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
 648
 649         writew(make16(ias_cmd), &p->scb->cbl_offset);
 650
 651         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 652         ni_attn586();
 653
 654         wait_for_stat_compl(ias_cmd);
 655
 656         if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 657                                                         (STAT_OK|STAT_COMPL)) {
 658                 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
 659                 return 1;
 660         }
 661
 662         /*
 663          * TDR, wire check .. e.g. no resistor e.t.c
 664          */
 665
 666         tdr_cmd = ptr;
 667
 668         writew(0, &tdr_cmd->cmd_status);
 669         writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
 670         writew(0xffff, &tdr_cmd->cmd_link);
 671         writew(0, &tdr_cmd->status);
 672
 673         writew(make16(tdr_cmd), &p->scb->cbl_offset);
 674         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 675         ni_attn586();
 676
 677         wait_for_stat_compl(tdr_cmd);
 678
 679         if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
 680                 printk(KERN_ERR "%s: Problems while running the TDR.\n",
 681                                 dev->name);
 682         else {
 683                 udelay(16);
 684                 result = readw(&tdr_cmd->status);
 685                 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 686                 ni_attn586(); /* ack the interrupts */
 687
 688                 if (result & TDR_LNK_OK)
 689                         ;
 690                 else if (result & TDR_XCVR_PRB)
 691                         printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
 692                                 dev->name);
 693                 else if (result & TDR_ET_OPN)
 694                         printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
 695                                 dev->name, result & TDR_TIMEMASK);
 696                 else if (result & TDR_ET_SRT) {
 697                         /* time == 0 -> strange :-) */
 698                         if (result & TDR_TIMEMASK)
 699                                 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
 700                                         dev->name, result & TDR_TIMEMASK);
 701                 } else
 702                         printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
 703                                                 dev->name, result);
 704         }
 705
 706         /*
 707          * Multicast setup
 708          */
 709         if (num_addrs && !(dev->flags & IFF_PROMISC)) {
 710                 mc_cmd = ptr;
 711                 writew(0, &mc_cmd->cmd_status);
 712                 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
 713                 writew(0xffff, &mc_cmd->cmd_link);
 714                 writew(num_addrs * 6, &mc_cmd->mc_cnt);
 715
 716                 for (i = 0; i < num_addrs; i++, dmi = dmi->next)
 717                         memcpy_toio(mc_cmd->mc_list[i],
 718                                                         dmi->dmi_addr, 6);
 719
 720                 writew(make16(mc_cmd), &p->scb->cbl_offset);
 721                 writeb(CUC_START, &p->scb->cmd_cuc);
 722                 ni_attn586();
 723
 724                 wait_for_stat_compl(mc_cmd);
 725
 726                 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
 727                                                  != (STAT_COMPL|STAT_OK))
 728                         printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
 729         }
 730
 731         /*
 732          * alloc nop/xmit-cmds
 733          */
 734 #if (NUM_XMIT_BUFFS == 1)
 735         for (i = 0; i < 2; i++) {
 736                 p->nop_cmds[i] = ptr;
 737                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 738                 writew(0, &p->nop_cmds[i]->cmd_status);
 739                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 740                 ptr = ptr + sizeof(struct nop_cmd_struct);
 741         }
 742 #else
 743         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 744                 p->nop_cmds[i] = ptr;
 745                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 746                 writew(0, &p->nop_cmds[i]->cmd_status);
 747                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 748                 ptr = ptr + sizeof(struct nop_cmd_struct);
 749         }
 750 #endif
 751
 752         ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
 753
 754         /*
 755          * alloc xmit-buffs / init xmit_cmds
 756          */
 757         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 758                 /* Transmit cmd/buff 0 */
 759                 p->xmit_cmds[i] = ptr;
 760                 ptr = ptr + sizeof(struct transmit_cmd_struct);
 761                 p->xmit_cbuffs[i] = ptr; /* char-buffs */
 762                 ptr = ptr + XMIT_BUFF_SIZE;
 763                 p->xmit_buffs[i] = ptr; /* TBD */
 764                 ptr = ptr + sizeof(struct tbd_struct);
 765                 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
 766                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
 767                                 dev->name);
 768                         return 1;
 769                 }
 770                 memset_io(p->xmit_cmds[i], 0,
 771                                         sizeof(struct transmit_cmd_struct));
 772                 memset_io(p->xmit_buffs[i], 0,
 773                                         sizeof(struct tbd_struct));
 774                 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
 775                                         &p->xmit_cmds[i]->cmd_link);
 776                 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
 777                 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
 778                 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
 779                 writew(0xffff, &p->xmit_buffs[i]->next);
 780                 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
 781         }
 782
 783         p->xmit_count = 0;
 784         p->xmit_last    = 0;
 785 #ifndef NO_NOPCOMMANDS
 786         p->nop_point    = 0;
 787 #endif
 788
 789          /*
 790                 * 'start transmitter'
 791                 */
 792 #ifndef NO_NOPCOMMANDS
 793         writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
 794         writeb(CUC_START, &p->scb->cmd_cuc);
 795         ni_attn586();
 796         wait_for_scb_cmd(dev);
 797 #else
 798         writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
 799         writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
 800 #endif
 801
 802         /*
 803          * ack. interrupts
 804          */
 805         writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 806         ni_attn586();
 807         udelay(16);
 808
 809         ni_enaint();
 810
 811         return 0;
 812 }
 813
 814 /******************************************************
 815  * This is a helper routine for ni52_rnr_int() and init586().
 816  * It sets up the Receive Frame Area (RFA).
 817  */
 818
 819 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
 820 {
 821         struct rfd_struct __iomem *rfd = ptr;
 822         struct rbd_struct __iomem *rbd;
 823         int i;
 824         struct priv *p = (struct priv *) dev->priv;
 825
 826         memset_io(rfd, 0,
 827                 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
 828         p->rfd_first = rfd;
 829
 830         for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
 831                 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
 832                         &rfd[i].next);
 833                 writew(0xffff, &rfd[i].rbd_offset);
 834         }
 835         /* RU suspend */
 836         writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
 837
 838         ptr = rfd + (p->num_recv_buffs + rfdadd);
 839
 840         rbd = ptr;
 841         ptr = rbd + p->num_recv_buffs;
 842
 843          /* clr descriptors */
 844         memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
 845
 846         for (i = 0; i < p->num_recv_buffs; i++) {
 847                 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
 848                 writew(RECV_BUFF_SIZE, &rbd[i].size);
 849                 writel(make24(ptr), &rbd[i].buffer);
 850                 ptr = ptr + RECV_BUFF_SIZE;
 851         }
 852         p->rfd_top      = p->rfd_first;
 853         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
 854
 855         writew(make16(p->rfd_first), &p->scb->rfa_offset);
 856         writew(make16(rbd), &p->rfd_first->rbd_offset);
 857
 858         return ptr;
 859 }
 860
 861
 862 /**************************************************
 863  * Interrupt Handler ...
 864  */
 865
 866 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
 867 {
 868         struct net_device *dev = dev_id;
 869         unsigned int stat;
 870         int cnt = 0;
 871         struct priv *p;
 872
 873         p = (struct priv *) dev->priv;
 874
 875         if (debuglevel > 1)
 876                 printk("I");
 877
 878         spin_lock(&p->spinlock);
 879
 880         wait_for_scb_cmd(dev); /* wait for last command */
 881
 882         while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
 883                 writeb(stat, &p->scb->cmd_cuc);
 884                 ni_attn586();
 885
 886                 if (stat & STAT_FR)      /* received a frame */
 887                         ni52_rcv_int(dev);
 888
 889                 if (stat & STAT_RNR) { /* RU went 'not ready' */
 890                         printk("(R)");
 891                         if (readb(&p->scb->rus) & RU_SUSPEND) {
 892                                 /* special case: RU_SUSPEND */
 893                                 wait_for_scb_cmd(dev);
 894                                 p->scb->cmd_ruc = RUC_RESUME;
 895                                 ni_attn586();
 896                                 wait_for_scb_cmd_ruc(dev);
 897                         } else {
 898                                 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
 899                                         dev->name, stat, readb(&p->scb->rus));
 900                                 ni52_rnr_int(dev);
 901                         }
 902                 }
 903
 904                 /* Command with I-bit set complete */
 905                 if (stat & STAT_CX)
 906                          ni52_xmt_int(dev);
 907
 908 #ifndef NO_NOPCOMMANDS
 909                 if (stat & STAT_CNA) {  /* CU went 'not ready' */
 910                         if (netif_running(dev))
 911                                 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
 912                                         dev->name, stat, readb(&p->scb->cus));
 913                 }
 914 #endif
 915
 916                 if (debuglevel > 1)
 917                         printk("%d", cnt++);
 918
 919                 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
 920                 wait_for_scb_cmd(dev);
 921                 if (p->scb->cmd_cuc) {   /* timed out? */
 922                         printk(KERN_ERR "%s: Acknowledge timed out.\n",
 923                                 dev->name);
 924                         ni_disint();
 925                         break;
 926                 }
 927         }
 928         spin_unlock(&p->spinlock);
 929
 930         if (debuglevel > 1)
 931                 printk("i");
 932         return IRQ_HANDLED;
 933 }
 934
 935 /*******************************************************
 936  * receive-interrupt
 937  */
 938
 939 static void ni52_rcv_int(struct net_device *dev)
 940 {
 941         int status, cnt = 0;
 942         unsigned short totlen;
 943         struct sk_buff *skb;
 944         struct rbd_struct __iomem *rbd;
 945         struct priv *p = (struct priv *)dev->priv;
 946
 947         if (debuglevel > 0)
 948                 printk("R");
 949
 950         for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
 951                 rbd = (struct rbd_struct __iomem *) make32(p->rfd_top->rbd_offset);
 952                 if (status & RFD_OK) { /* frame received without error? */
 953                         totlen = readw(&rbd->status);
 954                         if (totlen & RBD_LAST) {
 955                                 /* the first and the last buffer? */
 956                                 totlen &= RBD_MASK; /* length of this frame */
 957                                 writew(0x00, &rbd->status);
 958                                 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
 959                                 if (skb != NULL) {
 960                                         skb_reserve(skb, 2);
 961                                         skb_put(skb, totlen);
 962                                         skb_copy_to_linear_data(skb, (char *)p->base + (unsigned long) rbd->buffer, totlen);
 963                                         skb->protocol = eth_type_trans(skb, dev);
 964                                         netif_rx(skb);
 965                                         dev->last_rx = jiffies;
 966                                         p->stats.rx_packets++;
 967                                         p->stats.rx_bytes += totlen;
 968                                 } else
 969                                         p->stats.rx_dropped++;
 970                         } else {
 971                                 int rstat;
 972                                  /* free all RBD's until RBD_LAST is set */
 973                                 totlen = 0;
 974                                 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
 975                                         totlen += rstat & RBD_MASK;
 976                                         if (!rstat) {
 977                                                 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
 978                                                 break;
 979                                         }
 980                                         writew(0, &rbd->status);
 981                                         rbd = (struct rbd_struct __iomem *) make32(readl(&rbd->next));
 982                                 }
 983                                 totlen += rstat & RBD_MASK;
 984                                 writew(0, &rbd->status);
 985                                 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
 986                                         dev->name, totlen);
 987                                 p->stats.rx_dropped++;
 988                          }
 989                 } else {/* frame !(ok), only with 'save-bad-frames' */
 990                         printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
 991                                 dev->name, status);
 992                         p->stats.rx_errors++;
 993                 }
 994                 writeb(0, &p->rfd_top->stat_high);
 995                 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
 996                 writew(0xffff, &p->rfd_top->rbd_offset);
 997                 writeb(0, &p->rfd_last->last);  /* delete RFD_SUSP      */
 998                 p->rfd_last = p->rfd_top;
 999                 p->rfd_top = (struct rfd_struct __iomem *) make32(p->rfd_top->next); /* step to next RFD */
1000                 writew(make16(p->rfd_top), &p->scb->rfa_offset);
1001
1002                 if (debuglevel > 0)
1003                         printk("%d", cnt++);
1004         }
1005
1006         if (automatic_resume) {
1007                 wait_for_scb_cmd(dev);
1008                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1009                 ni_attn586();
1010                 wait_for_scb_cmd_ruc(dev);
1011         }
1012
1013 #ifdef WAIT_4_BUSY
1014         {
1015                 int i;
1016                 for (i = 0; i < 1024; i++) {
1017                         if (p->rfd_top->status)
1018                                 break;
1019                         udelay(16);
1020                         if (i == 1023)
1021                                 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1022                 }
1023         }
1024 #endif
1025         if (debuglevel > 0)
1026                 printk("r");
1027 }
1028
1029 /**********************************************************
1030  * handle 'Receiver went not ready'.
1031  */
1032
1033 static void ni52_rnr_int(struct net_device *dev)
1034 {
1035         struct priv *p = (struct priv *) dev->priv;
1036
1037         p->stats.rx_errors++;
1038
1039         wait_for_scb_cmd(dev);          /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1040         writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1041         ni_attn586();
1042         wait_for_scb_cmd_ruc(dev);              /* wait for accept cmd. */
1043
1044         alloc_rfa(dev, p->rfd_first);
1045         /* maybe add a check here, before restarting the RU */
1046         startrecv586(dev); /* restart RU */
1047
1048         printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->rus);
1049
1050 }
1051
1052 /**********************************************************
1053  * handle xmit - interrupt
1054  */
1055
1056 static void ni52_xmt_int(struct net_device *dev)
1057 {
1058         int status;
1059         struct priv *p = (struct priv *) dev->priv;
1060
1061         if (debuglevel > 0)
1062                 printk("X");
1063
1064         status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1065         if (!(status & STAT_COMPL))
1066                 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1067
1068         if (status & STAT_OK) {
1069                 p->stats.tx_packets++;
1070                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1071         } else {
1072                 p->stats.tx_errors++;
1073                 if (status & TCMD_LATECOLL) {
1074                         printk(KERN_ERR "%s: late collision detected.\n",
1075                                 dev->name);
1076                         p->stats.collisions++;
1077                 } else if (status & TCMD_NOCARRIER) {
1078                         p->stats.tx_carrier_errors++;
1079                         printk(KERN_ERR "%s: no carrier detected.\n",
1080                                 dev->name);
1081                 } else if (status & TCMD_LOSTCTS)
1082                         printk(KERN_ERR "%s: loss of CTS detected.\n",
1083                                 dev->name);
1084                 else if (status & TCMD_UNDERRUN) {
1085                         p->stats.tx_fifo_errors++;
1086                         printk(KERN_ERR "%s: DMA underrun detected.\n",
1087                                 dev->name);
1088                 } else if (status & TCMD_MAXCOLL) {
1089                         printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1090                                 dev->name);
1091                         p->stats.collisions += 16;
1092                 }
1093         }
1094 #if (NUM_XMIT_BUFFS > 1)
1095         if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1096                 p->xmit_last = 0;
1097 #endif
1098         netif_wake_queue(dev);
1099 }
1100
1101 /***********************************************************
1102  * (re)start the receiver
1103  */
1104
1105 static void startrecv586(struct net_device *dev)
1106 {
1107         struct priv *p = (struct priv *) dev->priv;
1108
1109         wait_for_scb_cmd(dev);
1110         wait_for_scb_cmd_ruc(dev);
1111         writew(make16(p->rfd_first), &p->scb->rfa_offset);
1112         writeb(RUC_START, &p->scb->cmd_ruc);
1113         ni_attn586();           /* start cmd. */
1114         wait_for_scb_cmd_ruc(dev);
1115         /* wait for accept cmd. (no timeout!!) */
1116 }
1117
1118 static void ni52_timeout(struct net_device *dev)
1119 {
1120         struct priv *p = (struct priv *) dev->priv;
1121 #ifndef NO_NOPCOMMANDS
1122         if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1123                 netif_wake_queue(dev);
1124 #ifdef DEBUG
1125                 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1126                         dev->name);
1127                 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1128                         dev->name, (int)p->xmit_cmds[0]->cmd_status,
1129                         readw(&p->nop_cmds[0]->cmd_status),
1130                         readw(&p->nop_cmds[1]->cmd_status),
1131                         p->nop_point);
1132 #endif
1133                 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1134                 ni_attn586();
1135                 wait_for_scb_cmd(dev);
1136                 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1137                 writeb(CUC_START, &p->scb->cmd_cuc);
1138                 ni_attn586();
1139                 wait_for_scb_cmd(dev);
1140                 dev->trans_start = jiffies;
1141                 return 0;
1142         }
1143 #endif
1144         {
1145 #ifdef DEBUG
1146                 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1147                                 dev->name, readb(&p->scb->cus));
1148                 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1149                                 dev->name,
1150                                 readw(&p->xmit_cmds[0]->cmd_status),
1151                                 readw(&p->xmit_cmds[1]->cmd_status));
1152                 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1153                                 dev->name);
1154 #endif
1155                 ni52_close(dev);
1156                 ni52_open(dev);
1157         }
1158         dev->trans_start = jiffies;
1159 }
1160
1161 /******************************************************
1162  * send frame
1163  */
1164
1165 static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
1166 {
1167         int len, i;
1168 #ifndef NO_NOPCOMMANDS
1169         int next_nop;
1170 #endif
1171         struct priv *p = (struct priv *) dev->priv;
1172
1173         if (skb->len > XMIT_BUFF_SIZE) {
1174                 printk(KERN_ERR "%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n", dev->name, XMIT_BUFF_SIZE, skb->len);
1175                 return 0;
1176         }
1177
1178         netif_stop_queue(dev);
1179
1180         skb_copy_from_linear_data(skb, (char *)p->xmit_cbuffs[p->xmit_count],
1181                                                         skb->len);
1182         len = skb->len;
1183         if (len < ETH_ZLEN) {
1184                 len = ETH_ZLEN;
1185                 memset((char *)p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1186                                                         len - skb->len);
1187         }
1188
1189 #if (NUM_XMIT_BUFFS == 1)
1190 #       ifdef NO_NOPCOMMANDS
1191
1192 #ifdef DEBUG
1193         if (p->scb->cus & CU_ACTIVE) {
1194                 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1195                 printk(KERN_ERR "%s: stat: %04x %04x\n",
1196                                 dev->name, readb(&p->scb->cus),
1197                                 readw(&p->xmit_cmds[0]->cmd_status));
1198         }
1199 #endif
1200         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);;
1201         for (i = 0; i < 16; i++) {
1202                 writew(0, &p->xmit_cmds[0]->cmd_status);
1203                 wait_for_scb_cmd(dev);
1204                 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1205                         writeb(CUC_RESUME, &p->scb->cmd_cuc);
1206                 else {
1207                         writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1208                         writeb(CUC_START, &p->scb->cmd_cuc);
1209                 }
1210                 ni_attn586();
1211                 dev->trans_start = jiffies;
1212                 if (!i)
1213                         dev_kfree_skb(skb);
1214                 wait_for_scb_cmd(dev);
1215                 /* test it, because CU sometimes doesn't start immediately */
1216                 if (readb(&p->scb->cus) & CU_ACTIVE)
1217                         break;
1218                 if (readw(&p->xmit_cmds[0]->cmd_status))
1219                         break;
1220                 if (i == 15)
1221                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1222         }
1223 #       else
1224         next_nop = (p->nop_point + 1) & 0x1;
1225         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1226         writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1227         writew(make16(p->nop_cmds[next_nop]),
1228                                 &p->nop_cmds[next_nop]->cmd_link);
1229         writew(0, &p->xmit_cmds[0]->cmd_status);
1230         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1231
1232         writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1233         dev->trans_start = jiffies;
1234         p->nop_point = next_nop;
1235         dev_kfree_skb(skb);
1236 #       endif
1237 #else
1238         writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1239         next_nop = p->xmit_count + 1
1240         if (next_nop == NUM_XMIT_BUFFS)
1241                 next_nop = 0;
1242         writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1243         /* linkpointer of xmit-command already points to next nop cmd */
1244         writew(make16(p->nop_cmds[next_nop]),
1245                                 &p->nop_cmds[next_nop]->cmd_link);
1246         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1247         writew(make16(p->xmit_cmds[p->xmit_count]),
1248                                 &p->nop_cmds[p->xmit_count]->cmd_link);
1249         dev->trans_start = jiffies;
1250         p->xmit_count = next_nop;
1251         {
1252                 unsigned long flags;
1253                 spin_lock_irqsave(&p->spinlock);
1254                 if (p->xmit_count != p->xmit_last)
1255                         netif_wake_queue(dev);
1256                 spin_unlock_irqrestore(&p->spinlock);
1257         }
1258         dev_kfree_skb(skb);
1259 #endif
1260         return 0;
1261 }
1262
1263 /*******************************************
1264  * Someone wanna have the statistics
1265  */
1266
1267 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1268 {
1269         struct priv *p = (struct priv *) dev->priv;
1270         unsigned short crc, aln, rsc, ovrn;
1271
1272         /* Get error-statistics from the ni82586 */
1273         crc = readw(&p->scb->crc_errs);
1274         writew(0, &p->scb->crc_errs);
1275         aln = readw(&p->scb->aln_errs);
1276         writew(0, &p->scb->aln_errs);
1277         rsc = readw(&p->scb->rsc_errs);
1278         writew(0, &p->scb->rsc_errs);
1279         ovrn = readw(&p->scb->ovrn_errs);
1280         writew(0, &p->scb->ovrn_errs);
1281
1282         p->stats.rx_crc_errors += crc;
1283         p->stats.rx_fifo_errors += ovrn;
1284         p->stats.rx_frame_errors += aln;
1285         p->stats.rx_dropped += rsc;
1286
1287         return &p->stats;
1288 }
1289
1290 /********************************************************
1291  * Set MC list ..
1292  */
1293
1294 static void set_multicast_list(struct net_device *dev)
1295 {
1296         netif_stop_queue(dev);
1297         ni_disint();
1298         alloc586(dev);
1299         init586(dev);
1300         startrecv586(dev);
1301         ni_enaint();
1302         netif_wake_queue(dev);
1303 }
1304
1305 #ifdef MODULE
1306 static struct net_device *dev_ni52;
1307
1308 module_param(io, int, 0);
1309 module_param(irq, int, 0);
1310 module_param(memstart, long, 0);
1311 module_param(memend, long, 0);
1312 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1313 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1314 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1315 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1316
1317 int __init init_module(void)
1318 {
1319         if (io <= 0x0 || !memend || !memstart || irq < 2) {
1320                 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1321                 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1322                 return -ENODEV;
1323         }
1324         dev_ni52 = ni52_probe(-1);
1325         if (IS_ERR(dev_ni52))
1326                 return PTR_ERR(dev_ni52);
1327         return 0;
1328 }
1329
1330 void __exit cleanup_module(void)
1331 {
1332         unregister_netdev(dev_ni52);
1333         release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1334         free_netdev(dev_ni52);
1335 }
1336 #endif /* MODULE */
1337
1338 MODULE_LICENSE("GPL");
1339
1340 /*
1341  * END: linux/drivers/net/ni52.c
1342  */