drivers/net/ni52.c

   1 /*
   2  * net-3-driver for the NI5210 card (i82586 Ethernet chip)
   3  *
   4  * This is an extension to the Linux operating system, and is covered by the
   5  * same GNU General Public License that covers that work.
   6  *
   7  * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
   8  * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
   9  *    [feel free to mail ....]
  10  *
  11  * when using as module: (no autoprobing!)
  12  *   run with e.g:
  13  *       insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000
  14  *
  15  * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!.
  16  *
  17  * If you find a bug, please report me:
  18  *   The kernel panic output and any kmsg from the ni52 driver
  19  *   the ni5210-driver-version and the linux-kernel version
  20  *   how many shared memory (memsize) on the netcard,
  21  *   bootprom: yes/no, base_addr, mem_start
  22  *   maybe the ni5210-card revision and the i82586 version
  23  *
  24  * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340
  25  *                mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000,
  26  *                           0xd8000,0xcc000,0xce000,0xda000,0xdc000
  27  *
  28  * sources:
  29  *   skeleton.c from Donald Becker
  30  *
  31  * I have also done a look in the following sources: (mail me if you need them)
  32  *   crynwr-packet-driver by Russ Nelson
  33  *   Garret A. Wollman's (fourth) i82586-driver for BSD
  34  *   (before getting an i82596 (yes 596 not 586) manual, the existing drivers
  35  *    helped me a lot to understand this tricky chip.)
  36  *
  37  * Known Problems:
  38  *   The internal sysbus seems to be slow. So we often lose packets because of
  39  *   overruns while receiving from a fast remote host.
  40  *   This can slow down TCP connections. Maybe the newer ni5210 cards are
  41  *   better. My experience is, that if a machine sends with more than about
  42  *   500-600K/s the fifo/sysbus overflows.
  43  *
  44  * IMPORTANT NOTE:
  45  *   On fast networks, it's a (very) good idea to have 16K shared memory. With
  46  *   8K, we can store only 4 receive frames, so it can (easily) happen that a
  47  *   remote machine 'overruns' our system.
  48  *
  49  * Known i82586/card problems (I'm sure, there are many more!):
  50  *   Running the NOP-mode, the i82586 sometimes seems to forget to report
  51  *   every xmit-interrupt until we restart the CU.
  52  *   Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit
  53  *   in the RBD-Struct which indicates an end of the RBD queue.
  54  *   Instead, the RU fetches another (randomly selected and
  55  *   usually used) RBD and begins to fill it. (Maybe, this happens only if
  56  *   the last buffer from the previous RFD fits exact into the queue and
  57  *   the next RFD can't fetch an initial RBD. Anyone knows more? )
  58  *
  59  * results from ftp performance tests with Linux 1.2.5
  60  *   send and receive about 350-400 KByte/s (peak up to 460 kbytes/s)
  61  *   sending in NOP-mode: peak performance up to 530K/s (but better don't
  62  *   run this mode)
  63  */
  64
  65 /*
  66  * 29.Sept.96: virt_to_bus changes for new memory scheme
  67  * 19.Feb.96: more Mcast changes, module support (MH)
  68  *
  69  * 18.Nov.95: Mcast changes (AC).
  70  *
  71  * 23.April.95: fixed(?) receiving problems by configuring a RFD more
  72  *              than the number of RBD's. Can maybe cause other problems.
  73  * 18.April.95: Added MODULE support (MH)
  74  * 17.April.95: MC related changes in init586() and set_multicast_list().
  75  *              removed use of 'jiffies' in init586() (MH)
  76  *
  77  * 19.Sep.94: Added Multicast support (not tested yet) (MH)
  78  *
  79  * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling.
  80  *            Now, every RFD has exact one RBD. (MH)
  81  *
  82  * 14.Sep.94: added promiscuous mode, a few cleanups (MH)
  83  *
  84  * 19.Aug.94: changed request_irq() parameter (MH)
  85  *
  86  * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)
  87  *
  88  * 19.July.94: lotsa cleanups .. (MH)
  89  *
  90  * 17.July.94: some patches ... verified to run with 1.1.29 (MH)
  91  *
  92  * 4.July.94: patches for Linux 1.1.24  (MH)
  93  *
  94  * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)
  95  *
  96  * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff,
  97  *                              too (MH)
  98  *
  99  * < 30.Sep.93: first versions
 100  */
 101
 102 static int debuglevel;  /* debug-printk 0: off 1: a few 2: more */
 103 static int automatic_resume; /* experimental .. better should be zero */
 104 static int rfdadd;      /* rfdadd=1 may be better for 8K MEM cards */
 105 static int fifo = 0x8;  /* don't change */
 106
 107 #include <linux/module.h>
 108 #include <linux/kernel.h>
 109 #include <linux/string.h>
 110 #include <linux/errno.h>
 111 #include <linux/ioport.h>
 112 #include <linux/interrupt.h>
 113 #include <linux/delay.h>
 114 #include <linux/init.h>
 115 #include <linux/bitops.h>
 116 #include <asm/io.h>
 117
 118 #include <linux/netdevice.h>
 119 #include <linux/etherdevice.h>
 120 #include <linux/skbuff.h>
 121
 122 #include "ni52.h"
 123
 124 #define DRV_NAME "ni52"
 125
 126 #define DEBUG       /* debug on */
 127 #define SYSBUSVAL 1 /* 8 Bit */
 128
 129 #define ni_attn586()  { outb(0, dev->base_addr + NI52_ATTENTION); }
 130 #define ni_reset586() { outb(0, dev->base_addr + NI52_RESET); }
 131 #define ni_disint()   { outb(0, dev->base_addr + NI52_INTDIS); }
 132 #define ni_enaint()   { outb(0, dev->base_addr + NI52_INTENA); }
 133
 134 #define make32(ptr16) ((void __iomem *)(p->memtop + (short) (ptr16)))
 135 #define make24(ptr32) ((char __iomem *)(ptr32)) - p->base
 136 #define make16(ptr32) ((unsigned short) ((char __iomem *)(ptr32)\
 137                                         - p->memtop))
 138
 139 /******************* how to calculate the buffers *****************************
 140
 141   * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
 142   * --------------- in a different (more stable?) mode. Only in this mode it's
 143   *                 possible to configure the driver with 'NO_NOPCOMMANDS'
 144
 145 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
 146 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
 147 sizeof(rfd) = 24; sizeof(rbd) = 12;
 148 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
 149 sizeof(nop_cmd) = 8;
 150
 151   * if you don't know the driver, better do not change these values: */
 152
 153 #define RECV_BUFF_SIZE 1524 /* slightly oversized */
 154 #define XMIT_BUFF_SIZE 1524 /* slightly oversized */
 155 #define NUM_XMIT_BUFFS 1    /* config for both, 8K and 16K shmem */
 156 #define NUM_RECV_BUFFS_8  4 /* config for 8K shared mem */
 157 #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
 158 #define NO_NOPCOMMANDS      /* only possible with NUM_XMIT_BUFFS=1 */
 159
 160 /**************************************************************************/
 161
 162
 163 #define NI52_TOTAL_SIZE 16
 164 #define NI52_ADDR0 0x02
 165 #define NI52_ADDR1 0x07
 166 #define NI52_ADDR2 0x01
 167
 168 static int     ni52_probe1(struct net_device *dev, int ioaddr);
 169 static irqreturn_t ni52_interrupt(int irq, void *dev_id);
 170 static int     ni52_open(struct net_device *dev);
 171 static int     ni52_close(struct net_device *dev);
 172 static netdev_tx_t ni52_send_packet(struct sk_buff *, struct net_device *);
 173 static struct  net_device_stats *ni52_get_stats(struct net_device *dev);
 174 static void    set_multicast_list(struct net_device *dev);
 175 static void    ni52_timeout(struct net_device *dev);
 176
 177 /* helper-functions */
 178 static int     init586(struct net_device *dev);
 179 static int     check586(struct net_device *dev, unsigned size);
 180 static void    alloc586(struct net_device *dev);
 181 static void    startrecv586(struct net_device *dev);
 182 static void   __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr);
 183 static void    ni52_rcv_int(struct net_device *dev);
 184 static void    ni52_xmt_int(struct net_device *dev);
 185 static void    ni52_rnr_int(struct net_device *dev);
 186
 187 struct priv {
 188         char __iomem *base;
 189         char __iomem *mapped;
 190         char __iomem *memtop;
 191         spinlock_t spinlock;
 192         int reset;
 193         struct rfd_struct __iomem *rfd_last, *rfd_top, *rfd_first;
 194         struct scp_struct __iomem *scp;
 195         struct iscp_struct __iomem *iscp;
 196         struct scb_struct __iomem *scb;
 197         struct tbd_struct __iomem *xmit_buffs[NUM_XMIT_BUFFS];
 198 #if (NUM_XMIT_BUFFS == 1)
 199         struct transmit_cmd_struct __iomem *xmit_cmds[2];
 200         struct nop_cmd_struct __iomem *nop_cmds[2];
 201 #else
 202         struct transmit_cmd_struct __iomem *xmit_cmds[NUM_XMIT_BUFFS];
 203         struct nop_cmd_struct __iomem *nop_cmds[NUM_XMIT_BUFFS];
 204 #endif
 205         int nop_point, num_recv_buffs;
 206         char __iomem *xmit_cbuffs[NUM_XMIT_BUFFS];
 207         int xmit_count, xmit_last;
 208 };
 209
 210 /* wait for command with timeout: */
 211 static void wait_for_scb_cmd(struct net_device *dev)
 212 {
 213         struct priv *p = netdev_priv(dev);
 214         int i;
 215         for (i = 0; i < 16384; i++) {
 216                 if (readb(&p->scb->cmd_cuc) == 0)
 217                       break;
 218                 udelay(4);
 219                 if (i == 16383) {
 220                         printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",
 221                                 dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus));
 222                         if (!p->reset) {
 223                                 p->reset = 1;
 224                                 ni_reset586();
 225                         }
 226                 }
 227         }
 228 }
 229
 230 static void wait_for_scb_cmd_ruc(struct net_device *dev)
 231 {
 232         struct priv *p = netdev_priv(dev);
 233         int i;
 234         for (i = 0; i < 16384; i++) {
 235                 if (readb(&p->scb->cmd_ruc) == 0)
 236                         break;
 237                 udelay(4);
 238                 if (i == 16383) {
 239                         printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",
 240                                 dev->name, readb(&p->scb->cmd_ruc),
 241                                 readb(&p->scb->rus));
 242                         if (!p->reset) {
 243                                 p->reset = 1;
 244                                 ni_reset586();
 245                         }
 246                 }
 247         }
 248 }
 249
 250 static void wait_for_stat_compl(void __iomem *p)
 251 {
 252         struct nop_cmd_struct __iomem *addr = p;
 253         int i;
 254         for (i = 0; i < 32767; i++) {
 255                 if (readw(&((addr)->cmd_status)) & STAT_COMPL)
 256                         break;
 257                 udelay(32);
 258         }
 259 }
 260
 261 /**********************************************
 262  * close device
 263  */
 264 static int ni52_close(struct net_device *dev)
 265 {
 266         free_irq(dev->irq, dev);
 267         ni_reset586(); /* the hard way to stop the receiver */
 268         netif_stop_queue(dev);
 269         return 0;
 270 }
 271
 272 /**********************************************
 273  * open device
 274  */
 275 static int ni52_open(struct net_device *dev)
 276 {
 277         int ret;
 278
 279         ni_disint();
 280         alloc586(dev);
 281         init586(dev);
 282         startrecv586(dev);
 283         ni_enaint();
 284
 285         ret = request_irq(dev->irq, ni52_interrupt, 0, dev->name, dev);
 286         if (ret) {
 287                 ni_reset586();
 288                 return ret;
 289         }
 290         netif_start_queue(dev);
 291         return 0; /* most done by init */
 292 }
 293
 294 static int check_iscp(struct net_device *dev, void __iomem *addr)
 295 {
 296         struct iscp_struct __iomem *iscp = addr;
 297         struct priv *p = netdev_priv(dev);
 298         memset_io(iscp, 0, sizeof(struct iscp_struct));
 299
 300         writel(make24(iscp), &p->scp->iscp);
 301         writeb(1, &iscp->busy);
 302
 303         ni_reset586();
 304         ni_attn586();
 305         mdelay(32);     /* wait a while... */
 306         /* i82586 clears 'busy' after successful init */
 307         if (readb(&iscp->busy))
 308                 return 0;
 309         return 1;
 310 }
 311
 312 /**********************************************
 313  * Check to see if there's an 82586 out there.
 314  */
 315 static int check586(struct net_device *dev, unsigned size)
 316 {
 317         struct priv *p = netdev_priv(dev);
 318         int i;
 319
 320         p->mapped = ioremap(dev->mem_start, size);
 321         if (!p->mapped)
 322                 return 0;
 323
 324         p->base = p->mapped + size - 0x01000000;
 325         p->memtop = p->mapped + size;
 326         p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
 327         p->scb  = (struct scb_struct __iomem *) p->mapped;
 328         p->iscp = (struct iscp_struct __iomem *)p->scp - 1;
 329         memset_io(p->scp, 0, sizeof(struct scp_struct));
 330         for (i = 0; i < sizeof(struct scp_struct); i++)
 331                 /* memory was writeable? */
 332                 if (readb((char __iomem *)p->scp + i))
 333                         goto Enodev;
 334         writeb(SYSBUSVAL, &p->scp->sysbus);     /* 1 = 8Bit-Bus, 0 = 16 Bit */
 335         if (readb(&p->scp->sysbus) != SYSBUSVAL)
 336                 goto Enodev;
 337
 338         if (!check_iscp(dev, p->mapped))
 339                 goto Enodev;
 340         if (!check_iscp(dev, p->iscp))
 341                 goto Enodev;
 342         return 1;
 343 Enodev:
 344         iounmap(p->mapped);
 345         return 0;
 346 }
 347
 348 /******************************************************************
 349  * set iscp at the right place, called by ni52_probe1 and open586.
 350  */
 351 static void alloc586(struct net_device *dev)
 352 {
 353         struct priv *p = netdev_priv(dev);
 354
 355         ni_reset586();
 356         mdelay(32);
 357
 358         memset_io(p->iscp, 0, sizeof(struct iscp_struct));
 359         memset_io(p->scp , 0, sizeof(struct scp_struct));
 360
 361         writel(make24(p->iscp), &p->scp->iscp);
 362         writeb(SYSBUSVAL, &p->scp->sysbus);
 363         writew(make16(p->scb), &p->iscp->scb_offset);
 364
 365         writeb(1, &p->iscp->busy);
 366         ni_reset586();
 367         ni_attn586();
 368
 369         mdelay(32);
 370
 371         if (readb(&p->iscp->busy))
 372                 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
 373
 374         p->reset = 0;
 375
 376         memset_io(p->scb, 0, sizeof(struct scb_struct));
 377 }
 378
 379 /* set: io,irq,memstart,memend or set it when calling insmod */
 380 static int irq = 9;
 381 static int io = 0x300;
 382 static long memstart;   /* e.g 0xd0000 */
 383 static long memend;     /* e.g 0xd4000 */
 384
 385 /**********************************************
 386  * probe the ni5210-card
 387  */
 388 struct net_device * __init ni52_probe(int unit)
 389 {
 390         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
 391         static const int ports[] = {0x300, 0x280, 0x360, 0x320, 0x340, 0};
 392         const int *port;
 393         struct priv *p;
 394         int err = 0;
 395
 396         if (!dev)
 397                 return ERR_PTR(-ENOMEM);
 398
 399         p = netdev_priv(dev);
 400
 401         if (unit >= 0) {
 402                 sprintf(dev->name, "eth%d", unit);
 403                 netdev_boot_setup_check(dev);
 404                 io = dev->base_addr;
 405                 irq = dev->irq;
 406                 memstart = dev->mem_start;
 407                 memend = dev->mem_end;
 408         }
 409
 410         if (io > 0x1ff) {       /* Check a single specified location. */
 411                 err = ni52_probe1(dev, io);
 412         } else if (io > 0) {            /* Don't probe at all. */
 413                 err = -ENXIO;
 414         } else {
 415                 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
 416                         ;
 417                 if (*port)
 418                         goto got_it;
 419 #ifdef FULL_IO_PROBE
 420                 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
 421                         ;
 422                 if (io < 0x400)
 423                         goto got_it;
 424 #endif
 425                 err = -ENODEV;
 426         }
 427         if (err)
 428                 goto out;
 429 got_it:
 430         err = register_netdev(dev);
 431         if (err)
 432                 goto out1;
 433         return dev;
 434 out1:
 435         iounmap(p->mapped);
 436         release_region(dev->base_addr, NI52_TOTAL_SIZE);
 437 out:
 438         free_netdev(dev);
 439         return ERR_PTR(err);
 440 }
 441
 442 static const struct net_device_ops ni52_netdev_ops = {
 443         .ndo_open               = ni52_open,
 444         .ndo_stop               = ni52_close,
 445         .ndo_get_stats          = ni52_get_stats,
 446         .ndo_tx_timeout         = ni52_timeout,
 447         .ndo_start_xmit         = ni52_send_packet,
 448         .ndo_set_multicast_list = set_multicast_list,
 449         .ndo_change_mtu         = eth_change_mtu,
 450         .ndo_set_mac_address    = eth_mac_addr,
 451         .ndo_validate_addr      = eth_validate_addr,
 452 };
 453
 454 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
 455 {
 456         int i, size, retval;
 457         struct priv *priv = netdev_priv(dev);
 458
 459         dev->base_addr = ioaddr;
 460         dev->irq = irq;
 461         dev->mem_start = memstart;
 462         dev->mem_end = memend;
 463
 464         spin_lock_init(&priv->spinlock);
 465
 466         if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
 467                 return -EBUSY;
 468
 469         if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
 470             !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
 471                 retval = -ENODEV;
 472                 goto out;
 473         }
 474
 475         for (i = 0; i < ETH_ALEN; i++)
 476                 dev->dev_addr[i] = inb(dev->base_addr+i);
 477
 478         if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1 ||
 479             dev->dev_addr[2] != NI52_ADDR2) {
 480                 retval = -ENODEV;
 481                 goto out;
 482         }
 483
 484         printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
 485                                 dev->name, dev->base_addr);
 486
 487         /*
 488          * check (or search) IO-Memory, 8K and 16K
 489          */
 490 #ifdef MODULE
 491         size = dev->mem_end - dev->mem_start;
 492         if (size != 0x2000 && size != 0x4000) {
 493                 printk("\n");
 494                 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
 495                 retval = -ENODEV;
 496                 goto out;
 497         }
 498         if (!check586(dev, size)) {
 499                 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
 500                 retval = -ENODEV;
 501                 goto out;
 502         }
 503 #else
 504         if (dev->mem_start != 0) {
 505                 /* no auto-mem-probe */
 506                 size = 0x4000; /* check for 16K mem */
 507                 if (!check586(dev, size)) {
 508                         size = 0x2000; /* check for 8K mem */
 509                         if (!check586(dev, size)) {
 510                                 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
 511                                 retval = -ENODEV;
 512                                 goto out;
 513                         }
 514                 }
 515         } else {
 516                 static const unsigned long memaddrs[] = {
 517                         0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
 518                         0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
 519                 };
 520                 for (i = 0;; i++) {
 521                         if (!memaddrs[i]) {
 522                                 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
 523                                 retval = -ENODEV;
 524                                 goto out;
 525                         }
 526                         dev->mem_start = memaddrs[i];
 527                         size = 0x2000; /* check for 8K mem */
 528                         if (check586(dev, size))
 529                                 /* 8K-check */
 530                                 break;
 531                         size = 0x4000; /* check for 16K mem */
 532                         if (check586(dev, size))
 533                                 /* 16K-check */
 534                                 break;
 535                 }
 536         }
 537         /* set mem_end showed by 'ifconfig' */
 538         dev->mem_end = dev->mem_start + size;
 539 #endif
 540
 541         alloc586(dev);
 542
 543         /* set number of receive-buffs according to memsize */
 544         if (size == 0x2000)
 545                 priv->num_recv_buffs = NUM_RECV_BUFFS_8;
 546         else
 547                 priv->num_recv_buffs = NUM_RECV_BUFFS_16;
 548
 549         printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
 550                                 dev->mem_start, size);
 551
 552         if (dev->irq < 2) {
 553                 unsigned long irq_mask;
 554
 555                 irq_mask = probe_irq_on();
 556                 ni_reset586();
 557                 ni_attn586();
 558
 559                 mdelay(20);
 560                 dev->irq = probe_irq_off(irq_mask);
 561                 if (!dev->irq) {
 562                         printk("?autoirq, Failed to detect IRQ line!\n");
 563                         retval = -EAGAIN;
 564                         iounmap(priv->mapped);
 565                         goto out;
 566                 }
 567                 printk("IRQ %d (autodetected).\n", dev->irq);
 568         } else {
 569                 if (dev->irq == 2)
 570                         dev->irq = 9;
 571                 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
 572         }
 573
 574         dev->netdev_ops         = &ni52_netdev_ops;
 575         dev->watchdog_timeo     = HZ/20;
 576
 577         return 0;
 578 out:
 579         release_region(ioaddr, NI52_TOTAL_SIZE);
 580         return retval;
 581 }
 582
 583 /**********************************************
 584  * init the chip (ni52-interrupt should be disabled?!)
 585  * needs a correct 'allocated' memory
 586  */
 587
 588 static int init586(struct net_device *dev)
 589 {
 590         void __iomem *ptr;
 591         int i, result = 0;
 592         struct priv *p = netdev_priv(dev);
 593         struct configure_cmd_struct __iomem *cfg_cmd;
 594         struct iasetup_cmd_struct __iomem *ias_cmd;
 595         struct tdr_cmd_struct __iomem *tdr_cmd;
 596         struct mcsetup_cmd_struct __iomem *mc_cmd;
 597         struct netdev_hw_addr *ha;
 598         int num_addrs = netdev_mc_count(dev);
 599
 600         ptr = p->scb + 1;
 601
 602         cfg_cmd = ptr; /* configure-command */
 603         writew(0, &cfg_cmd->cmd_status);
 604         writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
 605         writew(0xFFFF, &cfg_cmd->cmd_link);
 606
 607         /* number of cfg bytes */
 608         writeb(0x0a, &cfg_cmd->byte_cnt);
 609         /* fifo-limit (8=tx:32/rx:64) */
 610         writeb(fifo, &cfg_cmd->fifo);
 611         /* hold or discard bad recv frames (bit 7) */
 612         writeb(0x40, &cfg_cmd->sav_bf);
 613         /* addr_len |!src_insert |pre-len |loopback */
 614         writeb(0x2e, &cfg_cmd->adr_len);
 615         writeb(0x00, &cfg_cmd->priority);
 616         writeb(0x60, &cfg_cmd->ifs);
 617         writeb(0x00, &cfg_cmd->time_low);
 618         writeb(0xf2, &cfg_cmd->time_high);
 619         writeb(0x00, &cfg_cmd->promisc);
 620         if (dev->flags & IFF_ALLMULTI) {
 621                 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
 622                 if (num_addrs > len) {
 623                         printk(KERN_ERR "%s: switching to promisc. mode\n",
 624                                 dev->name);
 625                         writeb(0x01, &cfg_cmd->promisc);
 626                 }
 627         }
 628         if (dev->flags & IFF_PROMISC)
 629                 writeb(0x01, &cfg_cmd->promisc);
 630         writeb(0x00, &cfg_cmd->carr_coll);
 631         writew(make16(cfg_cmd), &p->scb->cbl_offset);
 632         writeb(0, &p->scb->cmd_ruc);
 633
 634         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 635         ni_attn586();
 636
 637         wait_for_stat_compl(cfg_cmd);
 638
 639         if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 640                                                         (STAT_COMPL|STAT_OK)) {
 641                 printk(KERN_ERR "%s: configure command failed: %x\n",
 642                                 dev->name, readw(&cfg_cmd->cmd_status));
 643                 return 1;
 644         }
 645
 646         /*
 647          * individual address setup
 648          */
 649
 650         ias_cmd = ptr;
 651
 652         writew(0, &ias_cmd->cmd_status);
 653         writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
 654         writew(0xffff, &ias_cmd->cmd_link);
 655
 656         memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
 657
 658         writew(make16(ias_cmd), &p->scb->cbl_offset);
 659
 660         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 661         ni_attn586();
 662
 663         wait_for_stat_compl(ias_cmd);
 664
 665         if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 666                                                         (STAT_OK|STAT_COMPL)) {
 667                 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
 668                 return 1;
 669         }
 670
 671         /*
 672          * TDR, wire check .. e.g. no resistor e.t.c
 673          */
 674
 675         tdr_cmd = ptr;
 676
 677         writew(0, &tdr_cmd->cmd_status);
 678         writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
 679         writew(0xffff, &tdr_cmd->cmd_link);
 680         writew(0, &tdr_cmd->status);
 681
 682         writew(make16(tdr_cmd), &p->scb->cbl_offset);
 683         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 684         ni_attn586();
 685
 686         wait_for_stat_compl(tdr_cmd);
 687
 688         if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
 689                 printk(KERN_ERR "%s: Problems while running the TDR.\n",
 690                                 dev->name);
 691         else {
 692                 udelay(16);
 693                 result = readw(&tdr_cmd->status);
 694                 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 695                 ni_attn586(); /* ack the interrupts */
 696
 697                 if (result & TDR_LNK_OK)
 698                         ;
 699                 else if (result & TDR_XCVR_PRB)
 700                         printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
 701                                 dev->name);
 702                 else if (result & TDR_ET_OPN)
 703                         printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
 704                                 dev->name, result & TDR_TIMEMASK);
 705                 else if (result & TDR_ET_SRT) {
 706                         /* time == 0 -> strange :-) */
 707                         if (result & TDR_TIMEMASK)
 708                                 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
 709                                         dev->name, result & TDR_TIMEMASK);
 710                 } else
 711                         printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
 712                                                 dev->name, result);
 713         }
 714
 715         /*
 716          * Multicast setup
 717          */
 718         if (num_addrs && !(dev->flags & IFF_PROMISC)) {
 719                 mc_cmd = ptr;
 720                 writew(0, &mc_cmd->cmd_status);
 721                 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
 722                 writew(0xffff, &mc_cmd->cmd_link);
 723                 writew(num_addrs * 6, &mc_cmd->mc_cnt);
 724
 725                 i = 0;
 726                 netdev_for_each_mc_addr(ha, dev)
 727                         memcpy_toio(mc_cmd->mc_list[i++], ha->addr, 6);
 728
 729                 writew(make16(mc_cmd), &p->scb->cbl_offset);
 730                 writeb(CUC_START, &p->scb->cmd_cuc);
 731                 ni_attn586();
 732
 733                 wait_for_stat_compl(mc_cmd);
 734
 735                 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
 736                                                  != (STAT_COMPL|STAT_OK))
 737                         printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
 738         }
 739
 740         /*
 741          * alloc nop/xmit-cmds
 742          */
 743 #if (NUM_XMIT_BUFFS == 1)
 744         for (i = 0; i < 2; i++) {
 745                 p->nop_cmds[i] = ptr;
 746                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 747                 writew(0, &p->nop_cmds[i]->cmd_status);
 748                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 749                 ptr = ptr + sizeof(struct nop_cmd_struct);
 750         }
 751 #else
 752         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 753                 p->nop_cmds[i] = ptr;
 754                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 755                 writew(0, &p->nop_cmds[i]->cmd_status);
 756                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 757                 ptr = ptr + sizeof(struct nop_cmd_struct);
 758         }
 759 #endif
 760
 761         ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
 762
 763         /*
 764          * alloc xmit-buffs / init xmit_cmds
 765          */
 766         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 767                 /* Transmit cmd/buff 0 */
 768                 p->xmit_cmds[i] = ptr;
 769                 ptr = ptr + sizeof(struct transmit_cmd_struct);
 770                 p->xmit_cbuffs[i] = ptr; /* char-buffs */
 771                 ptr = ptr + XMIT_BUFF_SIZE;
 772                 p->xmit_buffs[i] = ptr; /* TBD */
 773                 ptr = ptr + sizeof(struct tbd_struct);
 774                 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
 775                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
 776                                 dev->name);
 777                         return 1;
 778                 }
 779                 memset_io(p->xmit_cmds[i], 0,
 780                                         sizeof(struct transmit_cmd_struct));
 781                 memset_io(p->xmit_buffs[i], 0,
 782                                         sizeof(struct tbd_struct));
 783                 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
 784                                         &p->xmit_cmds[i]->cmd_link);
 785                 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
 786                 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
 787                 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
 788                 writew(0xffff, &p->xmit_buffs[i]->next);
 789                 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
 790         }
 791
 792         p->xmit_count = 0;
 793         p->xmit_last    = 0;
 794 #ifndef NO_NOPCOMMANDS
 795         p->nop_point    = 0;
 796 #endif
 797
 798          /*
 799                 * 'start transmitter'
 800                 */
 801 #ifndef NO_NOPCOMMANDS
 802         writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
 803         writeb(CUC_START, &p->scb->cmd_cuc);
 804         ni_attn586();
 805         wait_for_scb_cmd(dev);
 806 #else
 807         writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
 808         writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
 809 #endif
 810
 811         /*
 812          * ack. interrupts
 813          */
 814         writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 815         ni_attn586();
 816         udelay(16);
 817
 818         ni_enaint();
 819
 820         return 0;
 821 }
 822
 823 /******************************************************
 824  * This is a helper routine for ni52_rnr_int() and init586().
 825  * It sets up the Receive Frame Area (RFA).
 826  */
 827
 828 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
 829 {
 830         struct rfd_struct __iomem *rfd = ptr;
 831         struct rbd_struct __iomem *rbd;
 832         int i;
 833         struct priv *p = netdev_priv(dev);
 834
 835         memset_io(rfd, 0,
 836                 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
 837         p->rfd_first = rfd;
 838
 839         for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
 840                 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
 841                         &rfd[i].next);
 842                 writew(0xffff, &rfd[i].rbd_offset);
 843         }
 844         /* RU suspend */
 845         writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
 846
 847         ptr = rfd + (p->num_recv_buffs + rfdadd);
 848
 849         rbd = ptr;
 850         ptr = rbd + p->num_recv_buffs;
 851
 852          /* clr descriptors */
 853         memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
 854
 855         for (i = 0; i < p->num_recv_buffs; i++) {
 856                 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
 857                 writew(RECV_BUFF_SIZE, &rbd[i].size);
 858                 writel(make24(ptr), &rbd[i].buffer);
 859                 ptr = ptr + RECV_BUFF_SIZE;
 860         }
 861         p->rfd_top      = p->rfd_first;
 862         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
 863
 864         writew(make16(p->rfd_first), &p->scb->rfa_offset);
 865         writew(make16(rbd), &p->rfd_first->rbd_offset);
 866
 867         return ptr;
 868 }
 869
 870
 871 /**************************************************
 872  * Interrupt Handler ...
 873  */
 874
 875 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
 876 {
 877         struct net_device *dev = dev_id;
 878         unsigned int stat;
 879         int cnt = 0;
 880         struct priv *p;
 881
 882         p = netdev_priv(dev);
 883
 884         if (debuglevel > 1)
 885                 printk("I");
 886
 887         spin_lock(&p->spinlock);
 888
 889         wait_for_scb_cmd(dev); /* wait for last command */
 890
 891         while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
 892                 writeb(stat, &p->scb->cmd_cuc);
 893                 ni_attn586();
 894
 895                 if (stat & STAT_FR)      /* received a frame */
 896                         ni52_rcv_int(dev);
 897
 898                 if (stat & STAT_RNR) { /* RU went 'not ready' */
 899                         printk("(R)");
 900                         if (readb(&p->scb->rus) & RU_SUSPEND) {
 901                                 /* special case: RU_SUSPEND */
 902                                 wait_for_scb_cmd(dev);
 903                                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
 904                                 ni_attn586();
 905                                 wait_for_scb_cmd_ruc(dev);
 906                         } else {
 907                                 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
 908                                         dev->name, stat, readb(&p->scb->rus));
 909                                 ni52_rnr_int(dev);
 910                         }
 911                 }
 912
 913                 /* Command with I-bit set complete */
 914                 if (stat & STAT_CX)
 915                          ni52_xmt_int(dev);
 916
 917 #ifndef NO_NOPCOMMANDS
 918                 if (stat & STAT_CNA) {  /* CU went 'not ready' */
 919                         if (netif_running(dev))
 920                                 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
 921                                         dev->name, stat, readb(&p->scb->cus));
 922                 }
 923 #endif
 924
 925                 if (debuglevel > 1)
 926                         printk("%d", cnt++);
 927
 928                 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
 929                 wait_for_scb_cmd(dev);
 930                 if (readb(&p->scb->cmd_cuc)) {   /* timed out? */
 931                         printk(KERN_ERR "%s: Acknowledge timed out.\n",
 932                                 dev->name);
 933                         ni_disint();
 934                         break;
 935                 }
 936         }
 937         spin_unlock(&p->spinlock);
 938
 939         if (debuglevel > 1)
 940                 printk("i");
 941         return IRQ_HANDLED;
 942 }
 943
 944 /*******************************************************
 945  * receive-interrupt
 946  */
 947
 948 static void ni52_rcv_int(struct net_device *dev)
 949 {
 950         int status, cnt = 0;
 951         unsigned short totlen;
 952         struct sk_buff *skb;
 953         struct rbd_struct __iomem *rbd;
 954         struct priv *p = netdev_priv(dev);
 955
 956         if (debuglevel > 0)
 957                 printk("R");
 958
 959         for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
 960                 rbd = make32(readw(&p->rfd_top->rbd_offset));
 961                 if (status & RFD_OK) { /* frame received without error? */
 962                         totlen = readw(&rbd->status);
 963                         if (totlen & RBD_LAST) {
 964                                 /* the first and the last buffer? */
 965                                 totlen &= RBD_MASK; /* length of this frame */
 966                                 writew(0x00, &rbd->status);
 967                                 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
 968                                 if (skb != NULL) {
 969                                         skb_reserve(skb, 2);
 970                                         skb_put(skb, totlen);
 971                                         memcpy_fromio(skb->data, p->base + readl(&rbd->buffer), totlen);
 972                                         skb->protocol = eth_type_trans(skb, dev);
 973                                         netif_rx(skb);
 974                                         dev->stats.rx_packets++;
 975                                         dev->stats.rx_bytes += totlen;
 976                                 } else
 977                                         dev->stats.rx_dropped++;
 978                         } else {
 979                                 int rstat;
 980                                  /* free all RBD's until RBD_LAST is set */
 981                                 totlen = 0;
 982                                 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
 983                                         totlen += rstat & RBD_MASK;
 984                                         if (!rstat) {
 985                                                 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
 986                                                 break;
 987                                         }
 988                                         writew(0, &rbd->status);
 989                                         rbd = make32(readw(&rbd->next));
 990                                 }
 991                                 totlen += rstat & RBD_MASK;
 992                                 writew(0, &rbd->status);
 993                                 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
 994                                         dev->name, totlen);
 995                                 dev->stats.rx_dropped++;
 996                          }
 997                 } else {/* frame !(ok), only with 'save-bad-frames' */
 998                         printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
 999                                 dev->name, status);
1000                         dev->stats.rx_errors++;
1001                 }
1002                 writeb(0, &p->rfd_top->stat_high);
1003                 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
1004                 writew(0xffff, &p->rfd_top->rbd_offset);
1005                 writeb(0, &p->rfd_last->last);  /* delete RFD_SUSP      */
1006                 p->rfd_last = p->rfd_top;
1007                 p->rfd_top = make32(readw(&p->rfd_top->next)); /* step to next RFD */
1008                 writew(make16(p->rfd_top), &p->scb->rfa_offset);
1009
1010                 if (debuglevel > 0)
1011                         printk("%d", cnt++);
1012         }
1013
1014         if (automatic_resume) {
1015                 wait_for_scb_cmd(dev);
1016                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1017                 ni_attn586();
1018                 wait_for_scb_cmd_ruc(dev);
1019         }
1020
1021 #ifdef WAIT_4_BUSY
1022         {
1023                 int i;
1024                 for (i = 0; i < 1024; i++) {
1025                         if (p->rfd_top->status)
1026                                 break;
1027                         udelay(16);
1028                         if (i == 1023)
1029                                 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1030                 }
1031         }
1032 #endif
1033         if (debuglevel > 0)
1034                 printk("r");
1035 }
1036
1037 /**********************************************************
1038  * handle 'Receiver went not ready'.
1039  */
1040
1041 static void ni52_rnr_int(struct net_device *dev)
1042 {
1043         struct priv *p = netdev_priv(dev);
1044
1045         dev->stats.rx_errors++;
1046
1047         wait_for_scb_cmd(dev);          /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1048         writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1049         ni_attn586();
1050         wait_for_scb_cmd_ruc(dev);              /* wait for accept cmd. */
1051
1052         alloc_rfa(dev, p->rfd_first);
1053         /* maybe add a check here, before restarting the RU */
1054         startrecv586(dev); /* restart RU */
1055
1056         printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n",
1057                 dev->name, readb(&p->scb->rus));
1058
1059 }
1060
1061 /**********************************************************
1062  * handle xmit - interrupt
1063  */
1064
1065 static void ni52_xmt_int(struct net_device *dev)
1066 {
1067         int status;
1068         struct priv *p = netdev_priv(dev);
1069
1070         if (debuglevel > 0)
1071                 printk("X");
1072
1073         status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1074         if (!(status & STAT_COMPL))
1075                 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1076
1077         if (status & STAT_OK) {
1078                 dev->stats.tx_packets++;
1079                 dev->stats.collisions += (status & TCMD_MAXCOLLMASK);
1080         } else {
1081                 dev->stats.tx_errors++;
1082                 if (status & TCMD_LATECOLL) {
1083                         printk(KERN_ERR "%s: late collision detected.\n",
1084                                 dev->name);
1085                         dev->stats.collisions++;
1086                 } else if (status & TCMD_NOCARRIER) {
1087                         dev->stats.tx_carrier_errors++;
1088                         printk(KERN_ERR "%s: no carrier detected.\n",
1089                                 dev->name);
1090                 } else if (status & TCMD_LOSTCTS)
1091                         printk(KERN_ERR "%s: loss of CTS detected.\n",
1092                                 dev->name);
1093                 else if (status & TCMD_UNDERRUN) {
1094                         dev->stats.tx_fifo_errors++;
1095                         printk(KERN_ERR "%s: DMA underrun detected.\n",
1096                                 dev->name);
1097                 } else if (status & TCMD_MAXCOLL) {
1098                         printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1099                                 dev->name);
1100                         dev->stats.collisions += 16;
1101                 }
1102         }
1103 #if (NUM_XMIT_BUFFS > 1)
1104         if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1105                 p->xmit_last = 0;
1106 #endif
1107         netif_wake_queue(dev);
1108 }
1109
1110 /***********************************************************
1111  * (re)start the receiver
1112  */
1113
1114 static void startrecv586(struct net_device *dev)
1115 {
1116         struct priv *p = netdev_priv(dev);
1117
1118         wait_for_scb_cmd(dev);
1119         wait_for_scb_cmd_ruc(dev);
1120         writew(make16(p->rfd_first), &p->scb->rfa_offset);
1121         writeb(RUC_START, &p->scb->cmd_ruc);
1122         ni_attn586();           /* start cmd. */
1123         wait_for_scb_cmd_ruc(dev);
1124         /* wait for accept cmd. (no timeout!!) */
1125 }
1126
1127 static void ni52_timeout(struct net_device *dev)
1128 {
1129         struct priv *p = netdev_priv(dev);
1130 #ifndef NO_NOPCOMMANDS
1131         if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1132                 netif_wake_queue(dev);
1133 #ifdef DEBUG
1134                 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1135                         dev->name);
1136                 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1137                         dev->name, (int)p->xmit_cmds[0]->cmd_status,
1138                         readw(&p->nop_cmds[0]->cmd_status),
1139                         readw(&p->nop_cmds[1]->cmd_status),
1140                         p->nop_point);
1141 #endif
1142                 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1143                 ni_attn586();
1144                 wait_for_scb_cmd(dev);
1145                 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1146                 writeb(CUC_START, &p->scb->cmd_cuc);
1147                 ni_attn586();
1148                 wait_for_scb_cmd(dev);
1149                 dev->trans_start = jiffies; /* prevent tx timeout */
1150                 return 0;
1151         }
1152 #endif
1153         {
1154 #ifdef DEBUG
1155                 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1156                                 dev->name, readb(&p->scb->cus));
1157                 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1158                                 dev->name,
1159                                 readw(&p->xmit_cmds[0]->cmd_status),
1160                                 readw(&p->xmit_cmds[1]->cmd_status));
1161                 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1162                                 dev->name);
1163 #endif
1164                 ni52_close(dev);
1165                 ni52_open(dev);
1166         }
1167         dev->trans_start = jiffies; /* prevent tx timeout */
1168 }
1169
1170 /******************************************************
1171  * send frame
1172  */
1173
1174 static netdev_tx_t ni52_send_packet(struct sk_buff *skb,
1175                                     struct net_device *dev)
1176 {
1177         int len, i;
1178 #ifndef NO_NOPCOMMANDS
1179         int next_nop;
1180 #endif
1181         struct priv *p = netdev_priv(dev);
1182
1183         if (skb->len > XMIT_BUFF_SIZE) {
1184                 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);
1185                 return NETDEV_TX_OK;
1186         }
1187
1188         netif_stop_queue(dev);
1189
1190         memcpy_toio(p->xmit_cbuffs[p->xmit_count], skb->data, skb->len);
1191         len = skb->len;
1192         if (len < ETH_ZLEN) {
1193                 len = ETH_ZLEN;
1194                 memset_io(p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1195                                                         len - skb->len);
1196         }
1197
1198 #if (NUM_XMIT_BUFFS == 1)
1199 #       ifdef NO_NOPCOMMANDS
1200
1201 #ifdef DEBUG
1202         if (readb(&p->scb->cus) & CU_ACTIVE) {
1203                 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1204                 printk(KERN_ERR "%s: stat: %04x %04x\n",
1205                                 dev->name, readb(&p->scb->cus),
1206                                 readw(&p->xmit_cmds[0]->cmd_status));
1207         }
1208 #endif
1209         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1210         for (i = 0; i < 16; i++) {
1211                 writew(0, &p->xmit_cmds[0]->cmd_status);
1212                 wait_for_scb_cmd(dev);
1213                 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1214                         writeb(CUC_RESUME, &p->scb->cmd_cuc);
1215                 else {
1216                         writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1217                         writeb(CUC_START, &p->scb->cmd_cuc);
1218                 }
1219                 ni_attn586();
1220                 if (!i)
1221                         dev_kfree_skb(skb);
1222                 wait_for_scb_cmd(dev);
1223                 /* test it, because CU sometimes doesn't start immediately */
1224                 if (readb(&p->scb->cus) & CU_ACTIVE)
1225                         break;
1226                 if (readw(&p->xmit_cmds[0]->cmd_status))
1227                         break;
1228                 if (i == 15)
1229                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1230         }
1231 #       else
1232         next_nop = (p->nop_point + 1) & 0x1;
1233         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1234         writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1235         writew(make16(p->nop_cmds[next_nop]),
1236                                 &p->nop_cmds[next_nop]->cmd_link);
1237         writew(0, &p->xmit_cmds[0]->cmd_status);
1238         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1239
1240         writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1241         p->nop_point = next_nop;
1242         dev_kfree_skb(skb);
1243 #       endif
1244 #else
1245         writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1246         next_nop = p->xmit_count + 1
1247         if (next_nop == NUM_XMIT_BUFFS)
1248                 next_nop = 0;
1249         writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1250         /* linkpointer of xmit-command already points to next nop cmd */
1251         writew(make16(p->nop_cmds[next_nop]),
1252                                 &p->nop_cmds[next_nop]->cmd_link);
1253         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1254         writew(make16(p->xmit_cmds[p->xmit_count]),
1255                                 &p->nop_cmds[p->xmit_count]->cmd_link);
1256         p->xmit_count = next_nop;
1257         {
1258                 unsigned long flags;
1259                 spin_lock_irqsave(&p->spinlock);
1260                 if (p->xmit_count != p->xmit_last)
1261                         netif_wake_queue(dev);
1262                 spin_unlock_irqrestore(&p->spinlock);
1263         }
1264         dev_kfree_skb(skb);
1265 #endif
1266         return NETDEV_TX_OK;
1267 }
1268
1269 /*******************************************
1270  * Someone wanna have the statistics
1271  */
1272
1273 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1274 {
1275         struct priv *p = netdev_priv(dev);
1276         unsigned short crc, aln, rsc, ovrn;
1277
1278         /* Get error-statistics from the ni82586 */
1279         crc = readw(&p->scb->crc_errs);
1280         writew(0, &p->scb->crc_errs);
1281         aln = readw(&p->scb->aln_errs);
1282         writew(0, &p->scb->aln_errs);
1283         rsc = readw(&p->scb->rsc_errs);
1284         writew(0, &p->scb->rsc_errs);
1285         ovrn = readw(&p->scb->ovrn_errs);
1286         writew(0, &p->scb->ovrn_errs);
1287
1288         dev->stats.rx_crc_errors += crc;
1289         dev->stats.rx_fifo_errors += ovrn;
1290         dev->stats.rx_frame_errors += aln;
1291         dev->stats.rx_dropped += rsc;
1292
1293         return &dev->stats;
1294 }
1295
1296 /********************************************************
1297  * Set MC list ..
1298  */
1299
1300 static void set_multicast_list(struct net_device *dev)
1301 {
1302         netif_stop_queue(dev);
1303         ni_disint();
1304         alloc586(dev);
1305         init586(dev);
1306         startrecv586(dev);
1307         ni_enaint();
1308         netif_wake_queue(dev);
1309 }
1310
1311 #ifdef MODULE
1312 static struct net_device *dev_ni52;
1313
1314 module_param(io, int, 0);
1315 module_param(irq, int, 0);
1316 module_param(memstart, long, 0);
1317 module_param(memend, long, 0);
1318 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1319 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1320 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1321 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1322
1323 int __init init_module(void)
1324 {
1325         if (io <= 0x0 || !memend || !memstart || irq < 2) {
1326                 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1327                 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1328                 return -ENODEV;
1329         }
1330         dev_ni52 = ni52_probe(-1);
1331         if (IS_ERR(dev_ni52))
1332                 return PTR_ERR(dev_ni52);
1333         return 0;
1334 }
1335
1336 void __exit cleanup_module(void)
1337 {
1338         struct priv *p = netdev_priv(dev_ni52);
1339         unregister_netdev(dev_ni52);
1340         iounmap(p->mapped);
1341         release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1342         free_netdev(dev_ni52);
1343 }
1344 #endif /* MODULE */
1345
1346 MODULE_LICENSE("GPL");