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         struct net_device_stats stats;
 189         char __iomem *base;
 190         char __iomem *mapped;
 191         char __iomem *memtop;
 192         spinlock_t spinlock;
 193         int reset;
 194         struct rfd_struct __iomem *rfd_last, *rfd_top, *rfd_first;
 195         struct scp_struct __iomem *scp;
 196         struct iscp_struct __iomem *iscp;
 197         struct scb_struct __iomem *scb;
 198         struct tbd_struct __iomem *xmit_buffs[NUM_XMIT_BUFFS];
 199 #if (NUM_XMIT_BUFFS == 1)
 200         struct transmit_cmd_struct __iomem *xmit_cmds[2];
 201         struct nop_cmd_struct __iomem *nop_cmds[2];
 202 #else
 203         struct transmit_cmd_struct __iomem *xmit_cmds[NUM_XMIT_BUFFS];
 204         struct nop_cmd_struct __iomem *nop_cmds[NUM_XMIT_BUFFS];
 205 #endif
 206         int nop_point, num_recv_buffs;
 207         char __iomem *xmit_cbuffs[NUM_XMIT_BUFFS];
 208         int xmit_count, xmit_last;
 209 };
 210
 211 /* wait for command with timeout: */
 212 static void wait_for_scb_cmd(struct net_device *dev)
 213 {
 214         struct priv *p = netdev_priv(dev);
 215         int i;
 216         for (i = 0; i < 16384; i++) {
 217                 if (readb(&p->scb->cmd_cuc) == 0)
 218                       break;
 219                 udelay(4);
 220                 if (i == 16383) {
 221                         printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",
 222                                 dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus));
 223                         if (!p->reset) {
 224                                 p->reset = 1;
 225                                 ni_reset586();
 226                         }
 227                 }
 228         }
 229 }
 230
 231 static void wait_for_scb_cmd_ruc(struct net_device *dev)
 232 {
 233         struct priv *p = netdev_priv(dev);
 234         int i;
 235         for (i = 0; i < 16384; i++) {
 236                 if (readb(&p->scb->cmd_ruc) == 0)
 237                         break;
 238                 udelay(4);
 239                 if (i == 16383) {
 240                         printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",
 241                                 dev->name, readb(&p->scb->cmd_ruc),
 242                                 readb(&p->scb->rus));
 243                         if (!p->reset) {
 244                                 p->reset = 1;
 245                                 ni_reset586();
 246                         }
 247                 }
 248         }
 249 }
 250
 251 static void wait_for_stat_compl(void __iomem *p)
 252 {
 253         struct nop_cmd_struct __iomem *addr = p;
 254         int i;
 255         for (i = 0; i < 32767; i++) {
 256                 if (readw(&((addr)->cmd_status)) & STAT_COMPL)
 257                         break;
 258                 udelay(32);
 259         }
 260 }
 261
 262 /**********************************************
 263  * close device
 264  */
 265 static int ni52_close(struct net_device *dev)
 266 {
 267         free_irq(dev->irq, dev);
 268         ni_reset586(); /* the hard way to stop the receiver */
 269         netif_stop_queue(dev);
 270         return 0;
 271 }
 272
 273 /**********************************************
 274  * open device
 275  */
 276 static int ni52_open(struct net_device *dev)
 277 {
 278         int ret;
 279
 280         ni_disint();
 281         alloc586(dev);
 282         init586(dev);
 283         startrecv586(dev);
 284         ni_enaint();
 285
 286         ret = request_irq(dev->irq, ni52_interrupt, 0, dev->name, dev);
 287         if (ret) {
 288                 ni_reset586();
 289                 return ret;
 290         }
 291         netif_start_queue(dev);
 292         return 0; /* most done by init */
 293 }
 294
 295 static int check_iscp(struct net_device *dev, void __iomem *addr)
 296 {
 297         struct iscp_struct __iomem *iscp = addr;
 298         struct priv *p = netdev_priv(dev);
 299         memset_io(iscp, 0, sizeof(struct iscp_struct));
 300
 301         writel(make24(iscp), &p->scp->iscp);
 302         writeb(1, &iscp->busy);
 303
 304         ni_reset586();
 305         ni_attn586();
 306         mdelay(32);     /* wait a while... */
 307         /* i82586 clears 'busy' after successful init */
 308         if (readb(&iscp->busy))
 309                 return 0;
 310         return 1;
 311 }
 312
 313 /**********************************************
 314  * Check to see if there's an 82586 out there.
 315  */
 316 static int check586(struct net_device *dev, unsigned size)
 317 {
 318         struct priv *p = netdev_priv(dev);
 319         int i;
 320
 321         p->mapped = ioremap(dev->mem_start, size);
 322         if (!p->mapped)
 323                 return 0;
 324
 325         p->base = p->mapped + size - 0x01000000;
 326         p->memtop = p->mapped + size;
 327         p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
 328         p->scb  = (struct scb_struct __iomem *) p->mapped;
 329         p->iscp = (struct iscp_struct __iomem *)p->scp - 1;
 330         memset_io(p->scp, 0, sizeof(struct scp_struct));
 331         for (i = 0; i < sizeof(struct scp_struct); i++)
 332                 /* memory was writeable? */
 333                 if (readb((char __iomem *)p->scp + i))
 334                         goto Enodev;
 335         writeb(SYSBUSVAL, &p->scp->sysbus);     /* 1 = 8Bit-Bus, 0 = 16 Bit */
 336         if (readb(&p->scp->sysbus) != SYSBUSVAL)
 337                 goto Enodev;
 338
 339         if (!check_iscp(dev, p->mapped))
 340                 goto Enodev;
 341         if (!check_iscp(dev, p->iscp))
 342                 goto Enodev;
 343         return 1;
 344 Enodev:
 345         iounmap(p->mapped);
 346         return 0;
 347 }
 348
 349 /******************************************************************
 350  * set iscp at the right place, called by ni52_probe1 and open586.
 351  */
 352 static void alloc586(struct net_device *dev)
 353 {
 354         struct priv *p = netdev_priv(dev);
 355
 356         ni_reset586();
 357         mdelay(32);
 358
 359         memset_io(p->iscp, 0, sizeof(struct iscp_struct));
 360         memset_io(p->scp , 0, sizeof(struct scp_struct));
 361
 362         writel(make24(p->iscp), &p->scp->iscp);
 363         writeb(SYSBUSVAL, &p->scp->sysbus);
 364         writew(make16(p->scb), &p->iscp->scb_offset);
 365
 366         writeb(1, &p->iscp->busy);
 367         ni_reset586();
 368         ni_attn586();
 369
 370         mdelay(32);
 371
 372         if (readb(&p->iscp->busy))
 373                 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
 374
 375         p->reset = 0;
 376
 377         memset_io(p->scb, 0, sizeof(struct scb_struct));
 378 }
 379
 380 /* set: io,irq,memstart,memend or set it when calling insmod */
 381 static int irq = 9;
 382 static int io = 0x300;
 383 static long memstart;   /* e.g 0xd0000 */
 384 static long memend;     /* e.g 0xd4000 */
 385
 386 /**********************************************
 387  * probe the ni5210-card
 388  */
 389 struct net_device * __init ni52_probe(int unit)
 390 {
 391         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
 392         static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
 393         struct priv *p;
 394         int *port;
 395         int err = 0;
 396
 397         if (!dev)
 398                 return ERR_PTR(-ENOMEM);
 399
 400         p = netdev_priv(dev);
 401
 402         if (unit >= 0) {
 403                 sprintf(dev->name, "eth%d", unit);
 404                 netdev_boot_setup_check(dev);
 405                 io = dev->base_addr;
 406                 irq = dev->irq;
 407                 memstart = dev->mem_start;
 408                 memend = dev->mem_end;
 409         }
 410
 411         if (io > 0x1ff) {       /* Check a single specified location. */
 412                 err = ni52_probe1(dev, io);
 413         } else if (io > 0) {            /* Don't probe at all. */
 414                 err = -ENXIO;
 415         } else {
 416                 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
 417                         ;
 418                 if (*port)
 419                         goto got_it;
 420 #ifdef FULL_IO_PROBE
 421                 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
 422                         ;
 423                 if (io < 0x400)
 424                         goto got_it;
 425 #endif
 426                 err = -ENODEV;
 427         }
 428         if (err)
 429                 goto out;
 430 got_it:
 431         err = register_netdev(dev);
 432         if (err)
 433                 goto out1;
 434         return dev;
 435 out1:
 436         iounmap(p->mapped);
 437         release_region(dev->base_addr, NI52_TOTAL_SIZE);
 438 out:
 439         free_netdev(dev);
 440         return ERR_PTR(err);
 441 }
 442
 443 static const struct net_device_ops ni52_netdev_ops = {
 444         .ndo_open               = ni52_open,
 445         .ndo_stop               = ni52_close,
 446         .ndo_get_stats          = ni52_get_stats,
 447         .ndo_tx_timeout         = ni52_timeout,
 448         .ndo_start_xmit         = ni52_send_packet,
 449         .ndo_set_multicast_list = set_multicast_list,
 450         .ndo_change_mtu         = eth_change_mtu,
 451         .ndo_set_mac_address    = eth_mac_addr,
 452         .ndo_validate_addr      = eth_validate_addr,
 453 };
 454
 455 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
 456 {
 457         int i, size, retval;
 458         struct priv *priv = netdev_priv(dev);
 459
 460         dev->base_addr = ioaddr;
 461         dev->irq = irq;
 462         dev->mem_start = memstart;
 463         dev->mem_end = memend;
 464
 465         spin_lock_init(&priv->spinlock);
 466
 467         if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
 468                 return -EBUSY;
 469
 470         if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
 471             !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
 472                 retval = -ENODEV;
 473                 goto out;
 474         }
 475
 476         for (i = 0; i < ETH_ALEN; i++)
 477                 dev->dev_addr[i] = inb(dev->base_addr+i);
 478
 479         if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1 ||
 480             dev->dev_addr[2] != NI52_ADDR2) {
 481                 retval = -ENODEV;
 482                 goto out;
 483         }
 484
 485         printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
 486                                 dev->name, dev->base_addr);
 487
 488         /*
 489          * check (or search) IO-Memory, 8K and 16K
 490          */
 491 #ifdef MODULE
 492         size = dev->mem_end - dev->mem_start;
 493         if (size != 0x2000 && size != 0x4000) {
 494                 printk("\n");
 495                 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
 496                 retval = -ENODEV;
 497                 goto out;
 498         }
 499         if (!check586(dev, size)) {
 500                 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
 501                 retval = -ENODEV;
 502                 goto out;
 503         }
 504 #else
 505         if (dev->mem_start != 0) {
 506                 /* no auto-mem-probe */
 507                 size = 0x4000; /* check for 16K mem */
 508                 if (!check586(dev, size)) {
 509                         size = 0x2000; /* check for 8K mem */
 510                         if (!check586(dev, size)) {
 511                                 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
 512                                 retval = -ENODEV;
 513                                 goto out;
 514                         }
 515                 }
 516         } else {
 517                 static const unsigned long memaddrs[] = {
 518                         0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
 519                         0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
 520                 };
 521                 for (i = 0;; i++) {
 522                         if (!memaddrs[i]) {
 523                                 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
 524                                 retval = -ENODEV;
 525                                 goto out;
 526                         }
 527                         dev->mem_start = memaddrs[i];
 528                         size = 0x2000; /* check for 8K mem */
 529                         if (check586(dev, size))
 530                                 /* 8K-check */
 531                                 break;
 532                         size = 0x4000; /* check for 16K mem */
 533                         if (check586(dev, size))
 534                                 /* 16K-check */
 535                                 break;
 536                 }
 537         }
 538         /* set mem_end showed by 'ifconfig' */
 539         dev->mem_end = dev->mem_start + size;
 540 #endif
 541
 542         alloc586(dev);
 543
 544         /* set number of receive-buffs according to memsize */
 545         if (size == 0x2000)
 546                 priv->num_recv_buffs = NUM_RECV_BUFFS_8;
 547         else
 548                 priv->num_recv_buffs = NUM_RECV_BUFFS_16;
 549
 550         printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
 551                                 dev->mem_start, size);
 552
 553         if (dev->irq < 2) {
 554                 unsigned long irq_mask;
 555
 556                 irq_mask = probe_irq_on();
 557                 ni_reset586();
 558                 ni_attn586();
 559
 560                 mdelay(20);
 561                 dev->irq = probe_irq_off(irq_mask);
 562                 if (!dev->irq) {
 563                         printk("?autoirq, Failed to detect IRQ line!\n");
 564                         retval = -EAGAIN;
 565                         iounmap(priv->mapped);
 566                         goto out;
 567                 }
 568                 printk("IRQ %d (autodetected).\n", dev->irq);
 569         } else {
 570                 if (dev->irq == 2)
 571                         dev->irq = 9;
 572                 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
 573         }
 574
 575         dev->netdev_ops         = &ni52_netdev_ops;
 576         dev->watchdog_timeo     = HZ/20;
 577
 578         return 0;
 579 out:
 580         release_region(ioaddr, NI52_TOTAL_SIZE);
 581         return retval;
 582 }
 583
 584 /**********************************************
 585  * init the chip (ni52-interrupt should be disabled?!)
 586  * needs a correct 'allocated' memory
 587  */
 588
 589 static int init586(struct net_device *dev)
 590 {
 591         void __iomem *ptr;
 592         int i, result = 0;
 593         struct priv *p = netdev_priv(dev);
 594         struct configure_cmd_struct __iomem *cfg_cmd;
 595         struct iasetup_cmd_struct __iomem *ias_cmd;
 596         struct tdr_cmd_struct __iomem *tdr_cmd;
 597         struct mcsetup_cmd_struct __iomem *mc_cmd;
 598         struct netdev_hw_addr *ha;
 599         int num_addrs = netdev_mc_count(dev);
 600
 601         ptr = p->scb + 1;
 602
 603         cfg_cmd = ptr; /* configure-command */
 604         writew(0, &cfg_cmd->cmd_status);
 605         writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
 606         writew(0xFFFF, &cfg_cmd->cmd_link);
 607
 608         /* number of cfg bytes */
 609         writeb(0x0a, &cfg_cmd->byte_cnt);
 610         /* fifo-limit (8=tx:32/rx:64) */
 611         writeb(fifo, &cfg_cmd->fifo);
 612         /* hold or discard bad recv frames (bit 7) */
 613         writeb(0x40, &cfg_cmd->sav_bf);
 614         /* addr_len |!src_insert |pre-len |loopback */
 615         writeb(0x2e, &cfg_cmd->adr_len);
 616         writeb(0x00, &cfg_cmd->priority);
 617         writeb(0x60, &cfg_cmd->ifs);
 618         writeb(0x00, &cfg_cmd->time_low);
 619         writeb(0xf2, &cfg_cmd->time_high);
 620         writeb(0x00, &cfg_cmd->promisc);
 621         if (dev->flags & IFF_ALLMULTI) {
 622                 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
 623                 if (num_addrs > len) {
 624                         printk(KERN_ERR "%s: switching to promisc. mode\n",
 625                                 dev->name);
 626                         writeb(0x01, &cfg_cmd->promisc);
 627                 }
 628         }
 629         if (dev->flags & IFF_PROMISC)
 630                 writeb(0x01, &cfg_cmd->promisc);
 631         writeb(0x00, &cfg_cmd->carr_coll);
 632         writew(make16(cfg_cmd), &p->scb->cbl_offset);
 633         writeb(0, &p->scb->cmd_ruc);
 634
 635         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 636         ni_attn586();
 637
 638         wait_for_stat_compl(cfg_cmd);
 639
 640         if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 641                                                         (STAT_COMPL|STAT_OK)) {
 642                 printk(KERN_ERR "%s: configure command failed: %x\n",
 643                                 dev->name, readw(&cfg_cmd->cmd_status));
 644                 return 1;
 645         }
 646
 647         /*
 648          * individual address setup
 649          */
 650
 651         ias_cmd = ptr;
 652
 653         writew(0, &ias_cmd->cmd_status);
 654         writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
 655         writew(0xffff, &ias_cmd->cmd_link);
 656
 657         memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
 658
 659         writew(make16(ias_cmd), &p->scb->cbl_offset);
 660
 661         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 662         ni_attn586();
 663
 664         wait_for_stat_compl(ias_cmd);
 665
 666         if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
 667                                                         (STAT_OK|STAT_COMPL)) {
 668                 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
 669                 return 1;
 670         }
 671
 672         /*
 673          * TDR, wire check .. e.g. no resistor e.t.c
 674          */
 675
 676         tdr_cmd = ptr;
 677
 678         writew(0, &tdr_cmd->cmd_status);
 679         writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
 680         writew(0xffff, &tdr_cmd->cmd_link);
 681         writew(0, &tdr_cmd->status);
 682
 683         writew(make16(tdr_cmd), &p->scb->cbl_offset);
 684         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
 685         ni_attn586();
 686
 687         wait_for_stat_compl(tdr_cmd);
 688
 689         if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
 690                 printk(KERN_ERR "%s: Problems while running the TDR.\n",
 691                                 dev->name);
 692         else {
 693                 udelay(16);
 694                 result = readw(&tdr_cmd->status);
 695                 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 696                 ni_attn586(); /* ack the interrupts */
 697
 698                 if (result & TDR_LNK_OK)
 699                         ;
 700                 else if (result & TDR_XCVR_PRB)
 701                         printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
 702                                 dev->name);
 703                 else if (result & TDR_ET_OPN)
 704                         printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
 705                                 dev->name, result & TDR_TIMEMASK);
 706                 else if (result & TDR_ET_SRT) {
 707                         /* time == 0 -> strange :-) */
 708                         if (result & TDR_TIMEMASK)
 709                                 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
 710                                         dev->name, result & TDR_TIMEMASK);
 711                 } else
 712                         printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
 713                                                 dev->name, result);
 714         }
 715
 716         /*
 717          * Multicast setup
 718          */
 719         if (num_addrs && !(dev->flags & IFF_PROMISC)) {
 720                 mc_cmd = ptr;
 721                 writew(0, &mc_cmd->cmd_status);
 722                 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
 723                 writew(0xffff, &mc_cmd->cmd_link);
 724                 writew(num_addrs * 6, &mc_cmd->mc_cnt);
 725
 726                 i = 0;
 727                 netdev_for_each_mc_addr(ha, dev)
 728                         memcpy_toio(mc_cmd->mc_list[i++], ha->addr, 6);
 729
 730                 writew(make16(mc_cmd), &p->scb->cbl_offset);
 731                 writeb(CUC_START, &p->scb->cmd_cuc);
 732                 ni_attn586();
 733
 734                 wait_for_stat_compl(mc_cmd);
 735
 736                 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
 737                                                  != (STAT_COMPL|STAT_OK))
 738                         printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
 739         }
 740
 741         /*
 742          * alloc nop/xmit-cmds
 743          */
 744 #if (NUM_XMIT_BUFFS == 1)
 745         for (i = 0; i < 2; i++) {
 746                 p->nop_cmds[i] = ptr;
 747                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 748                 writew(0, &p->nop_cmds[i]->cmd_status);
 749                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 750                 ptr = ptr + sizeof(struct nop_cmd_struct);
 751         }
 752 #else
 753         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 754                 p->nop_cmds[i] = ptr;
 755                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
 756                 writew(0, &p->nop_cmds[i]->cmd_status);
 757                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
 758                 ptr = ptr + sizeof(struct nop_cmd_struct);
 759         }
 760 #endif
 761
 762         ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
 763
 764         /*
 765          * alloc xmit-buffs / init xmit_cmds
 766          */
 767         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
 768                 /* Transmit cmd/buff 0 */
 769                 p->xmit_cmds[i] = ptr;
 770                 ptr = ptr + sizeof(struct transmit_cmd_struct);
 771                 p->xmit_cbuffs[i] = ptr; /* char-buffs */
 772                 ptr = ptr + XMIT_BUFF_SIZE;
 773                 p->xmit_buffs[i] = ptr; /* TBD */
 774                 ptr = ptr + sizeof(struct tbd_struct);
 775                 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
 776                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
 777                                 dev->name);
 778                         return 1;
 779                 }
 780                 memset_io(p->xmit_cmds[i], 0,
 781                                         sizeof(struct transmit_cmd_struct));
 782                 memset_io(p->xmit_buffs[i], 0,
 783                                         sizeof(struct tbd_struct));
 784                 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
 785                                         &p->xmit_cmds[i]->cmd_link);
 786                 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
 787                 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
 788                 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
 789                 writew(0xffff, &p->xmit_buffs[i]->next);
 790                 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
 791         }
 792
 793         p->xmit_count = 0;
 794         p->xmit_last    = 0;
 795 #ifndef NO_NOPCOMMANDS
 796         p->nop_point    = 0;
 797 #endif
 798
 799          /*
 800                 * 'start transmitter'
 801                 */
 802 #ifndef NO_NOPCOMMANDS
 803         writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
 804         writeb(CUC_START, &p->scb->cmd_cuc);
 805         ni_attn586();
 806         wait_for_scb_cmd(dev);
 807 #else
 808         writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
 809         writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
 810 #endif
 811
 812         /*
 813          * ack. interrupts
 814          */
 815         writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
 816         ni_attn586();
 817         udelay(16);
 818
 819         ni_enaint();
 820
 821         return 0;
 822 }
 823
 824 /******************************************************
 825  * This is a helper routine for ni52_rnr_int() and init586().
 826  * It sets up the Receive Frame Area (RFA).
 827  */
 828
 829 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
 830 {
 831         struct rfd_struct __iomem *rfd = ptr;
 832         struct rbd_struct __iomem *rbd;
 833         int i;
 834         struct priv *p = netdev_priv(dev);
 835
 836         memset_io(rfd, 0,
 837                 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
 838         p->rfd_first = rfd;
 839
 840         for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
 841                 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
 842                         &rfd[i].next);
 843                 writew(0xffff, &rfd[i].rbd_offset);
 844         }
 845         /* RU suspend */
 846         writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
 847
 848         ptr = rfd + (p->num_recv_buffs + rfdadd);
 849
 850         rbd = ptr;
 851         ptr = rbd + p->num_recv_buffs;
 852
 853          /* clr descriptors */
 854         memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
 855
 856         for (i = 0; i < p->num_recv_buffs; i++) {
 857                 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
 858                 writew(RECV_BUFF_SIZE, &rbd[i].size);
 859                 writel(make24(ptr), &rbd[i].buffer);
 860                 ptr = ptr + RECV_BUFF_SIZE;
 861         }
 862         p->rfd_top      = p->rfd_first;
 863         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
 864
 865         writew(make16(p->rfd_first), &p->scb->rfa_offset);
 866         writew(make16(rbd), &p->rfd_first->rbd_offset);
 867
 868         return ptr;
 869 }
 870
 871
 872 /**************************************************
 873  * Interrupt Handler ...
 874  */
 875
 876 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
 877 {
 878         struct net_device *dev = dev_id;
 879         unsigned int stat;
 880         int cnt = 0;
 881         struct priv *p;
 882
 883         p = netdev_priv(dev);
 884
 885         if (debuglevel > 1)
 886                 printk("I");
 887
 888         spin_lock(&p->spinlock);
 889
 890         wait_for_scb_cmd(dev); /* wait for last command */
 891
 892         while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
 893                 writeb(stat, &p->scb->cmd_cuc);
 894                 ni_attn586();
 895
 896                 if (stat & STAT_FR)      /* received a frame */
 897                         ni52_rcv_int(dev);
 898
 899                 if (stat & STAT_RNR) { /* RU went 'not ready' */
 900                         printk("(R)");
 901                         if (readb(&p->scb->rus) & RU_SUSPEND) {
 902                                 /* special case: RU_SUSPEND */
 903                                 wait_for_scb_cmd(dev);
 904                                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
 905                                 ni_attn586();
 906                                 wait_for_scb_cmd_ruc(dev);
 907                         } else {
 908                                 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
 909                                         dev->name, stat, readb(&p->scb->rus));
 910                                 ni52_rnr_int(dev);
 911                         }
 912                 }
 913
 914                 /* Command with I-bit set complete */
 915                 if (stat & STAT_CX)
 916                          ni52_xmt_int(dev);
 917
 918 #ifndef NO_NOPCOMMANDS
 919                 if (stat & STAT_CNA) {  /* CU went 'not ready' */
 920                         if (netif_running(dev))
 921                                 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
 922                                         dev->name, stat, readb(&p->scb->cus));
 923                 }
 924 #endif
 925
 926                 if (debuglevel > 1)
 927                         printk("%d", cnt++);
 928
 929                 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
 930                 wait_for_scb_cmd(dev);
 931                 if (readb(&p->scb->cmd_cuc)) {   /* timed out? */
 932                         printk(KERN_ERR "%s: Acknowledge timed out.\n",
 933                                 dev->name);
 934                         ni_disint();
 935                         break;
 936                 }
 937         }
 938         spin_unlock(&p->spinlock);
 939
 940         if (debuglevel > 1)
 941                 printk("i");
 942         return IRQ_HANDLED;
 943 }
 944
 945 /*******************************************************
 946  * receive-interrupt
 947  */
 948
 949 static void ni52_rcv_int(struct net_device *dev)
 950 {
 951         int status, cnt = 0;
 952         unsigned short totlen;
 953         struct sk_buff *skb;
 954         struct rbd_struct __iomem *rbd;
 955         struct priv *p = netdev_priv(dev);
 956
 957         if (debuglevel > 0)
 958                 printk("R");
 959
 960         for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
 961                 rbd = make32(readw(&p->rfd_top->rbd_offset));
 962                 if (status & RFD_OK) { /* frame received without error? */
 963                         totlen = readw(&rbd->status);
 964                         if (totlen & RBD_LAST) {
 965                                 /* the first and the last buffer? */
 966                                 totlen &= RBD_MASK; /* length of this frame */
 967                                 writew(0x00, &rbd->status);
 968                                 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
 969                                 if (skb != NULL) {
 970                                         skb_reserve(skb, 2);
 971                                         skb_put(skb, totlen);
 972                                         memcpy_fromio(skb->data, p->base + readl(&rbd->buffer), totlen);
 973                                         skb->protocol = eth_type_trans(skb, dev);
 974                                         netif_rx(skb);
 975                                         p->stats.rx_packets++;
 976                                         p->stats.rx_bytes += totlen;
 977                                 } else
 978                                         p->stats.rx_dropped++;
 979                         } else {
 980                                 int rstat;
 981                                  /* free all RBD's until RBD_LAST is set */
 982                                 totlen = 0;
 983                                 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
 984                                         totlen += rstat & RBD_MASK;
 985                                         if (!rstat) {
 986                                                 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
 987                                                 break;
 988                                         }
 989                                         writew(0, &rbd->status);
 990                                         rbd = make32(readw(&rbd->next));
 991                                 }
 992                                 totlen += rstat & RBD_MASK;
 993                                 writew(0, &rbd->status);
 994                                 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
 995                                         dev->name, totlen);
 996                                 p->stats.rx_dropped++;
 997                          }
 998                 } else {/* frame !(ok), only with 'save-bad-frames' */
 999                         printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
1000                                 dev->name, status);
1001                         p->stats.rx_errors++;
1002                 }
1003                 writeb(0, &p->rfd_top->stat_high);
1004                 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
1005                 writew(0xffff, &p->rfd_top->rbd_offset);
1006                 writeb(0, &p->rfd_last->last);  /* delete RFD_SUSP      */
1007                 p->rfd_last = p->rfd_top;
1008                 p->rfd_top = make32(readw(&p->rfd_top->next)); /* step to next RFD */
1009                 writew(make16(p->rfd_top), &p->scb->rfa_offset);
1010
1011                 if (debuglevel > 0)
1012                         printk("%d", cnt++);
1013         }
1014
1015         if (automatic_resume) {
1016                 wait_for_scb_cmd(dev);
1017                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1018                 ni_attn586();
1019                 wait_for_scb_cmd_ruc(dev);
1020         }
1021
1022 #ifdef WAIT_4_BUSY
1023         {
1024                 int i;
1025                 for (i = 0; i < 1024; i++) {
1026                         if (p->rfd_top->status)
1027                                 break;
1028                         udelay(16);
1029                         if (i == 1023)
1030                                 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1031                 }
1032         }
1033 #endif
1034         if (debuglevel > 0)
1035                 printk("r");
1036 }
1037
1038 /**********************************************************
1039  * handle 'Receiver went not ready'.
1040  */
1041
1042 static void ni52_rnr_int(struct net_device *dev)
1043 {
1044         struct priv *p = netdev_priv(dev);
1045
1046         p->stats.rx_errors++;
1047
1048         wait_for_scb_cmd(dev);          /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1049         writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1050         ni_attn586();
1051         wait_for_scb_cmd_ruc(dev);              /* wait for accept cmd. */
1052
1053         alloc_rfa(dev, p->rfd_first);
1054         /* maybe add a check here, before restarting the RU */
1055         startrecv586(dev); /* restart RU */
1056
1057         printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n",
1058                 dev->name, readb(&p->scb->rus));
1059
1060 }
1061
1062 /**********************************************************
1063  * handle xmit - interrupt
1064  */
1065
1066 static void ni52_xmt_int(struct net_device *dev)
1067 {
1068         int status;
1069         struct priv *p = netdev_priv(dev);
1070
1071         if (debuglevel > 0)
1072                 printk("X");
1073
1074         status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1075         if (!(status & STAT_COMPL))
1076                 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1077
1078         if (status & STAT_OK) {
1079                 p->stats.tx_packets++;
1080                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1081         } else {
1082                 p->stats.tx_errors++;
1083                 if (status & TCMD_LATECOLL) {
1084                         printk(KERN_ERR "%s: late collision detected.\n",
1085                                 dev->name);
1086                         p->stats.collisions++;
1087                 } else if (status & TCMD_NOCARRIER) {
1088                         p->stats.tx_carrier_errors++;
1089                         printk(KERN_ERR "%s: no carrier detected.\n",
1090                                 dev->name);
1091                 } else if (status & TCMD_LOSTCTS)
1092                         printk(KERN_ERR "%s: loss of CTS detected.\n",
1093                                 dev->name);
1094                 else if (status & TCMD_UNDERRUN) {
1095                         p->stats.tx_fifo_errors++;
1096                         printk(KERN_ERR "%s: DMA underrun detected.\n",
1097                                 dev->name);
1098                 } else if (status & TCMD_MAXCOLL) {
1099                         printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1100                                 dev->name);
1101                         p->stats.collisions += 16;
1102                 }
1103         }
1104 #if (NUM_XMIT_BUFFS > 1)
1105         if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1106                 p->xmit_last = 0;
1107 #endif
1108         netif_wake_queue(dev);
1109 }
1110
1111 /***********************************************************
1112  * (re)start the receiver
1113  */
1114
1115 static void startrecv586(struct net_device *dev)
1116 {
1117         struct priv *p = netdev_priv(dev);
1118
1119         wait_for_scb_cmd(dev);
1120         wait_for_scb_cmd_ruc(dev);
1121         writew(make16(p->rfd_first), &p->scb->rfa_offset);
1122         writeb(RUC_START, &p->scb->cmd_ruc);
1123         ni_attn586();           /* start cmd. */
1124         wait_for_scb_cmd_ruc(dev);
1125         /* wait for accept cmd. (no timeout!!) */
1126 }
1127
1128 static void ni52_timeout(struct net_device *dev)
1129 {
1130         struct priv *p = netdev_priv(dev);
1131 #ifndef NO_NOPCOMMANDS
1132         if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1133                 netif_wake_queue(dev);
1134 #ifdef DEBUG
1135                 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1136                         dev->name);
1137                 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1138                         dev->name, (int)p->xmit_cmds[0]->cmd_status,
1139                         readw(&p->nop_cmds[0]->cmd_status),
1140                         readw(&p->nop_cmds[1]->cmd_status),
1141                         p->nop_point);
1142 #endif
1143                 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1144                 ni_attn586();
1145                 wait_for_scb_cmd(dev);
1146                 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1147                 writeb(CUC_START, &p->scb->cmd_cuc);
1148                 ni_attn586();
1149                 wait_for_scb_cmd(dev);
1150                 dev->trans_start = jiffies; /* prevent tx timeout */
1151                 return 0;
1152         }
1153 #endif
1154         {
1155 #ifdef DEBUG
1156                 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1157                                 dev->name, readb(&p->scb->cus));
1158                 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1159                                 dev->name,
1160                                 readw(&p->xmit_cmds[0]->cmd_status),
1161                                 readw(&p->xmit_cmds[1]->cmd_status));
1162                 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1163                                 dev->name);
1164 #endif
1165                 ni52_close(dev);
1166                 ni52_open(dev);
1167         }
1168         dev->trans_start = jiffies; /* prevent tx timeout */
1169 }
1170
1171 /******************************************************
1172  * send frame
1173  */
1174
1175 static netdev_tx_t ni52_send_packet(struct sk_buff *skb,
1176                                     struct net_device *dev)
1177 {
1178         int len, i;
1179 #ifndef NO_NOPCOMMANDS
1180         int next_nop;
1181 #endif
1182         struct priv *p = netdev_priv(dev);
1183
1184         if (skb->len > XMIT_BUFF_SIZE) {
1185                 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);
1186                 return NETDEV_TX_OK;
1187         }
1188
1189         netif_stop_queue(dev);
1190
1191         memcpy_toio(p->xmit_cbuffs[p->xmit_count], skb->data, skb->len);
1192         len = skb->len;
1193         if (len < ETH_ZLEN) {
1194                 len = ETH_ZLEN;
1195                 memset_io(p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1196                                                         len - skb->len);
1197         }
1198
1199 #if (NUM_XMIT_BUFFS == 1)
1200 #       ifdef NO_NOPCOMMANDS
1201
1202 #ifdef DEBUG
1203         if (readb(&p->scb->cus) & CU_ACTIVE) {
1204                 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1205                 printk(KERN_ERR "%s: stat: %04x %04x\n",
1206                                 dev->name, readb(&p->scb->cus),
1207                                 readw(&p->xmit_cmds[0]->cmd_status));
1208         }
1209 #endif
1210         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1211         for (i = 0; i < 16; i++) {
1212                 writew(0, &p->xmit_cmds[0]->cmd_status);
1213                 wait_for_scb_cmd(dev);
1214                 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1215                         writeb(CUC_RESUME, &p->scb->cmd_cuc);
1216                 else {
1217                         writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1218                         writeb(CUC_START, &p->scb->cmd_cuc);
1219                 }
1220                 ni_attn586();
1221                 if (!i)
1222                         dev_kfree_skb(skb);
1223                 wait_for_scb_cmd(dev);
1224                 /* test it, because CU sometimes doesn't start immediately */
1225                 if (readb(&p->scb->cus) & CU_ACTIVE)
1226                         break;
1227                 if (readw(&p->xmit_cmds[0]->cmd_status))
1228                         break;
1229                 if (i == 15)
1230                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1231         }
1232 #       else
1233         next_nop = (p->nop_point + 1) & 0x1;
1234         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1235         writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1236         writew(make16(p->nop_cmds[next_nop]),
1237                                 &p->nop_cmds[next_nop]->cmd_link);
1238         writew(0, &p->xmit_cmds[0]->cmd_status);
1239         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1240
1241         writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1242         p->nop_point = next_nop;
1243         dev_kfree_skb(skb);
1244 #       endif
1245 #else
1246         writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1247         next_nop = p->xmit_count + 1
1248         if (next_nop == NUM_XMIT_BUFFS)
1249                 next_nop = 0;
1250         writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1251         /* linkpointer of xmit-command already points to next nop cmd */
1252         writew(make16(p->nop_cmds[next_nop]),
1253                                 &p->nop_cmds[next_nop]->cmd_link);
1254         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1255         writew(make16(p->xmit_cmds[p->xmit_count]),
1256                                 &p->nop_cmds[p->xmit_count]->cmd_link);
1257         p->xmit_count = next_nop;
1258         {
1259                 unsigned long flags;
1260                 spin_lock_irqsave(&p->spinlock);
1261                 if (p->xmit_count != p->xmit_last)
1262                         netif_wake_queue(dev);
1263                 spin_unlock_irqrestore(&p->spinlock);
1264         }
1265         dev_kfree_skb(skb);
1266 #endif
1267         return NETDEV_TX_OK;
1268 }
1269
1270 /*******************************************
1271  * Someone wanna have the statistics
1272  */
1273
1274 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1275 {
1276         struct priv *p = netdev_priv(dev);
1277         unsigned short crc, aln, rsc, ovrn;
1278
1279         /* Get error-statistics from the ni82586 */
1280         crc = readw(&p->scb->crc_errs);
1281         writew(0, &p->scb->crc_errs);
1282         aln = readw(&p->scb->aln_errs);
1283         writew(0, &p->scb->aln_errs);
1284         rsc = readw(&p->scb->rsc_errs);
1285         writew(0, &p->scb->rsc_errs);
1286         ovrn = readw(&p->scb->ovrn_errs);
1287         writew(0, &p->scb->ovrn_errs);
1288
1289         p->stats.rx_crc_errors += crc;
1290         p->stats.rx_fifo_errors += ovrn;
1291         p->stats.rx_frame_errors += aln;
1292         p->stats.rx_dropped += rsc;
1293
1294         return &p->stats;
1295 }
1296
1297 /********************************************************
1298  * Set MC list ..
1299  */
1300
1301 static void set_multicast_list(struct net_device *dev)
1302 {
1303         netif_stop_queue(dev);
1304         ni_disint();
1305         alloc586(dev);
1306         init586(dev);
1307         startrecv586(dev);
1308         ni_enaint();
1309         netif_wake_queue(dev);
1310 }
1311
1312 #ifdef MODULE
1313 static struct net_device *dev_ni52;
1314
1315 module_param(io, int, 0);
1316 module_param(irq, int, 0);
1317 module_param(memstart, long, 0);
1318 module_param(memend, long, 0);
1319 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1320 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1321 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1322 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1323
1324 int __init init_module(void)
1325 {
1326         if (io <= 0x0 || !memend || !memstart || irq < 2) {
1327                 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1328                 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1329                 return -ENODEV;
1330         }
1331         dev_ni52 = ni52_probe(-1);
1332         if (IS_ERR(dev_ni52))
1333                 return PTR_ERR(dev_ni52);
1334         return 0;
1335 }
1336
1337 void __exit cleanup_module(void)
1338 {
1339         struct priv *p = netdev_priv(dev_ni52);
1340         unregister_netdev(dev_ni52);
1341         iounmap(p->mapped);
1342         release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1343         free_netdev(dev_ni52);
1344 }
1345 #endif /* MODULE */
1346
1347 MODULE_LICENSE("GPL");