clocksource: improve sh_cmt clocksource overflow handling
[linux-2.6.git] / 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/slab.h>
113 #include <linux/interrupt.h>
114 #include <linux/delay.h>
115 #include <linux/init.h>
116 #include <linux/bitops.h>
117 #include <asm/io.h>
118
119 #include <linux/netdevice.h>
120 #include <linux/etherdevice.h>
121 #include <linux/skbuff.h>
122
123 #include "ni52.h"
124
125 #define DRV_NAME "ni52"
126
127 #define DEBUG       /* debug on */
128 #define SYSBUSVAL 1 /* 8 Bit */
129
130 #define ni_attn586()  { outb(0, dev->base_addr + NI52_ATTENTION); }
131 #define ni_reset586() { outb(0, dev->base_addr + NI52_RESET); }
132 #define ni_disint()   { outb(0, dev->base_addr + NI52_INTDIS); }
133 #define ni_enaint()   { outb(0, dev->base_addr + NI52_INTENA); }
134
135 #define make32(ptr16) ((void __iomem *)(p->memtop + (short) (ptr16)))
136 #define make24(ptr32) ((char __iomem *)(ptr32)) - p->base
137 #define make16(ptr32) ((unsigned short) ((char __iomem *)(ptr32)\
138                                         - p->memtop))
139
140 /******************* how to calculate the buffers *****************************
141
142   * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
143   * --------------- in a different (more stable?) mode. Only in this mode it's
144   *                 possible to configure the driver with 'NO_NOPCOMMANDS'
145
146 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
147 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
148 sizeof(rfd) = 24; sizeof(rbd) = 12;
149 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
150 sizeof(nop_cmd) = 8;
151
152   * if you don't know the driver, better do not change these values: */
153
154 #define RECV_BUFF_SIZE 1524 /* slightly oversized */
155 #define XMIT_BUFF_SIZE 1524 /* slightly oversized */
156 #define NUM_XMIT_BUFFS 1    /* config for both, 8K and 16K shmem */
157 #define NUM_RECV_BUFFS_8  4 /* config for 8K shared mem */
158 #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
159 #define NO_NOPCOMMANDS      /* only possible with NUM_XMIT_BUFFS=1 */
160
161 /**************************************************************************/
162
163
164 #define NI52_TOTAL_SIZE 16
165 #define NI52_ADDR0 0x02
166 #define NI52_ADDR1 0x07
167 #define NI52_ADDR2 0x01
168
169 static int     ni52_probe1(struct net_device *dev, int ioaddr);
170 static irqreturn_t ni52_interrupt(int irq, void *dev_id);
171 static int     ni52_open(struct net_device *dev);
172 static int     ni52_close(struct net_device *dev);
173 static int     ni52_send_packet(struct sk_buff *, struct net_device *);
174 static struct  net_device_stats *ni52_get_stats(struct net_device *dev);
175 static void    set_multicast_list(struct net_device *dev);
176 static void    ni52_timeout(struct net_device *dev);
177
178 /* helper-functions */
179 static int     init586(struct net_device *dev);
180 static int     check586(struct net_device *dev, unsigned size);
181 static void    alloc586(struct net_device *dev);
182 static void    startrecv586(struct net_device *dev);
183 static void   __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr);
184 static void    ni52_rcv_int(struct net_device *dev);
185 static void    ni52_xmt_int(struct net_device *dev);
186 static void    ni52_rnr_int(struct net_device *dev);
187
188 struct priv {
189         struct net_device_stats stats;
190         char __iomem *base;
191         char __iomem *mapped;
192         char __iomem *memtop;
193         spinlock_t spinlock;
194         int reset;
195         struct rfd_struct __iomem *rfd_last, *rfd_top, *rfd_first;
196         struct scp_struct __iomem *scp;
197         struct iscp_struct __iomem *iscp;
198         struct scb_struct __iomem *scb;
199         struct tbd_struct __iomem *xmit_buffs[NUM_XMIT_BUFFS];
200 #if (NUM_XMIT_BUFFS == 1)
201         struct transmit_cmd_struct __iomem *xmit_cmds[2];
202         struct nop_cmd_struct __iomem *nop_cmds[2];
203 #else
204         struct transmit_cmd_struct __iomem *xmit_cmds[NUM_XMIT_BUFFS];
205         struct nop_cmd_struct __iomem *nop_cmds[NUM_XMIT_BUFFS];
206 #endif
207         int nop_point, num_recv_buffs;
208         char __iomem *xmit_cbuffs[NUM_XMIT_BUFFS];
209         int xmit_count, xmit_last;
210 };
211
212 /* wait for command with timeout: */
213 static void wait_for_scb_cmd(struct net_device *dev)
214 {
215         struct priv *p = netdev_priv(dev);
216         int i;
217         for (i = 0; i < 16384; i++) {
218                 if (readb(&p->scb->cmd_cuc) == 0)
219                       break;
220                 udelay(4);
221                 if (i == 16383) {
222                         printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",
223                                 dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus));
224                         if (!p->reset) {
225                                 p->reset = 1;
226                                 ni_reset586();
227                         }
228                 }
229         }
230 }
231
232 static void wait_for_scb_cmd_ruc(struct net_device *dev)
233 {
234         struct priv *p = netdev_priv(dev);
235         int i;
236         for (i = 0; i < 16384; i++) {
237                 if (readb(&p->scb->cmd_ruc) == 0)
238                         break;
239                 udelay(4);
240                 if (i == 16383) {
241                         printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",
242                                 dev->name, readb(&p->scb->cmd_ruc),
243                                 readb(&p->scb->rus));
244                         if (!p->reset) {
245                                 p->reset = 1;
246                                 ni_reset586();
247                         }
248                 }
249         }
250 }
251
252 static void wait_for_stat_compl(void __iomem *p)
253 {
254         struct nop_cmd_struct __iomem *addr = p;
255         int i;
256         for (i = 0; i < 32767; i++) {
257                 if (readw(&((addr)->cmd_status)) & STAT_COMPL)
258                         break;
259                 udelay(32);
260         }
261 }
262
263 /**********************************************
264  * close device
265  */
266 static int ni52_close(struct net_device *dev)
267 {
268         free_irq(dev->irq, dev);
269         ni_reset586(); /* the hard way to stop the receiver */
270         netif_stop_queue(dev);
271         return 0;
272 }
273
274 /**********************************************
275  * open device
276  */
277 static int ni52_open(struct net_device *dev)
278 {
279         int ret;
280
281         ni_disint();
282         alloc586(dev);
283         init586(dev);
284         startrecv586(dev);
285         ni_enaint();
286
287         ret = request_irq(dev->irq, &ni52_interrupt, 0, dev->name, dev);
288         if (ret) {
289                 ni_reset586();
290                 return ret;
291         }
292         netif_start_queue(dev);
293         return 0; /* most done by init */
294 }
295
296 static int check_iscp(struct net_device *dev, void __iomem *addr)
297 {
298         struct iscp_struct __iomem *iscp = addr;
299         struct priv *p = netdev_priv(dev);
300         memset_io(iscp, 0, sizeof(struct iscp_struct));
301
302         writel(make24(iscp), &p->scp->iscp);
303         writeb(1, &iscp->busy);
304
305         ni_reset586();
306         ni_attn586();
307         mdelay(32);     /* wait a while... */
308         /* i82586 clears 'busy' after successful init */
309         if (readb(&iscp->busy))
310                 return 0;
311         return 1;
312 }
313
314 /**********************************************
315  * Check to see if there's an 82586 out there.
316  */
317 static int check586(struct net_device *dev, unsigned size)
318 {
319         struct priv *p = netdev_priv(dev);
320         int i;
321
322         p->mapped = ioremap(dev->mem_start, size);
323         if (!p->mapped)
324                 return 0;
325
326         p->base = p->mapped + size - 0x01000000;
327         p->memtop = p->mapped + size;
328         p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
329         p->scb  = (struct scb_struct __iomem *) p->mapped;
330         p->iscp = (struct iscp_struct __iomem *)p->scp - 1;
331         memset_io(p->scp, 0, sizeof(struct scp_struct));
332         for (i = 0; i < sizeof(struct scp_struct); i++)
333                 /* memory was writeable? */
334                 if (readb((char __iomem *)p->scp + i))
335                         goto Enodev;
336         writeb(SYSBUSVAL, &p->scp->sysbus);     /* 1 = 8Bit-Bus, 0 = 16 Bit */
337         if (readb(&p->scp->sysbus) != SYSBUSVAL)
338                 goto Enodev;
339
340         if (!check_iscp(dev, p->mapped))
341                 goto Enodev;
342         if (!check_iscp(dev, p->iscp))
343                 goto Enodev;
344         return 1;
345 Enodev:
346         iounmap(p->mapped);
347         return 0;
348 }
349
350 /******************************************************************
351  * set iscp at the right place, called by ni52_probe1 and open586.
352  */
353 static void alloc586(struct net_device *dev)
354 {
355         struct priv *p = netdev_priv(dev);
356
357         ni_reset586();
358         mdelay(32);
359
360         memset_io(p->iscp, 0, sizeof(struct iscp_struct));
361         memset_io(p->scp , 0, sizeof(struct scp_struct));
362
363         writel(make24(p->iscp), &p->scp->iscp);
364         writeb(SYSBUSVAL, &p->scp->sysbus);
365         writew(make16(p->scb), &p->iscp->scb_offset);
366
367         writeb(1, &p->iscp->busy);
368         ni_reset586();
369         ni_attn586();
370
371         mdelay(32);
372
373         if (readb(&p->iscp->busy))
374                 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
375
376         p->reset = 0;
377
378         memset_io(p->scb, 0, sizeof(struct scb_struct));
379 }
380
381 /* set: io,irq,memstart,memend or set it when calling insmod */
382 static int irq = 9;
383 static int io = 0x300;
384 static long memstart;   /* e.g 0xd0000 */
385 static long memend;     /* e.g 0xd4000 */
386
387 /**********************************************
388  * probe the ni5210-card
389  */
390 struct net_device * __init ni52_probe(int unit)
391 {
392         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
393         static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
394         struct priv *p;
395         int *port;
396         int err = 0;
397
398         if (!dev)
399                 return ERR_PTR(-ENOMEM);
400
401         p = netdev_priv(dev);
402
403         if (unit >= 0) {
404                 sprintf(dev->name, "eth%d", unit);
405                 netdev_boot_setup_check(dev);
406                 io = dev->base_addr;
407                 irq = dev->irq;
408                 memstart = dev->mem_start;
409                 memend = dev->mem_end;
410         }
411
412         if (io > 0x1ff) {       /* Check a single specified location. */
413                 err = ni52_probe1(dev, io);
414         } else if (io > 0) {            /* Don't probe at all. */
415                 err = -ENXIO;
416         } else {
417                 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
418                         ;
419                 if (*port)
420                         goto got_it;
421 #ifdef FULL_IO_PROBE
422                 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
423                         ;
424                 if (io < 0x400)
425                         goto got_it;
426 #endif
427                 err = -ENODEV;
428         }
429         if (err)
430                 goto out;
431 got_it:
432         err = register_netdev(dev);
433         if (err)
434                 goto out1;
435         return dev;
436 out1:
437         iounmap(p->mapped);
438         release_region(dev->base_addr, NI52_TOTAL_SIZE);
439 out:
440         free_netdev(dev);
441         return ERR_PTR(err);
442 }
443
444 static const struct net_device_ops ni52_netdev_ops = {
445         .ndo_open               = ni52_open,
446         .ndo_stop               = ni52_close,
447         .ndo_get_stats          = ni52_get_stats,
448         .ndo_tx_timeout         = ni52_timeout,
449         .ndo_start_xmit         = ni52_send_packet,
450         .ndo_set_multicast_list = set_multicast_list,
451         .ndo_change_mtu         = eth_change_mtu,
452         .ndo_set_mac_address    = eth_mac_addr,
453         .ndo_validate_addr      = eth_validate_addr,
454 };
455
456 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
457 {
458         int i, size, retval;
459         struct priv *priv = netdev_priv(dev);
460
461         dev->base_addr = ioaddr;
462         dev->irq = irq;
463         dev->mem_start = memstart;
464         dev->mem_end = memend;
465
466         spin_lock_init(&priv->spinlock);
467
468         if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
469                 return -EBUSY;
470
471         if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
472             !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
473                 retval = -ENODEV;
474                 goto out;
475         }
476
477         for (i = 0; i < ETH_ALEN; i++)
478                 dev->dev_addr[i] = inb(dev->base_addr+i);
479
480         if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
481                  || dev->dev_addr[2] != NI52_ADDR2) {
482                 retval = -ENODEV;
483                 goto out;
484         }
485
486         printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
487                                 dev->name, dev->base_addr);
488
489         /*
490          * check (or search) IO-Memory, 8K and 16K
491          */
492 #ifdef MODULE
493         size = dev->mem_end - dev->mem_start;
494         if (size != 0x2000 && size != 0x4000) {
495                 printk("\n");
496                 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
497                 retval = -ENODEV;
498                 goto out;
499         }
500         if (!check586(dev, size)) {
501                 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
502                 retval = -ENODEV;
503                 goto out;
504         }
505 #else
506         if (dev->mem_start != 0) {
507                 /* no auto-mem-probe */
508                 size = 0x4000; /* check for 16K mem */
509                 if (!check586(dev, size)) {
510                         size = 0x2000; /* check for 8K mem */
511                         if (!check586(dev, size)) {
512                                 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
513                                 retval = -ENODEV;
514                                 goto out;
515                         }
516                 }
517         } else {
518                 static const unsigned long memaddrs[] = {
519                         0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
520                         0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
521                 };
522                 for (i = 0;; i++) {
523                         if (!memaddrs[i]) {
524                                 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
525                                 retval = -ENODEV;
526                                 goto out;
527                         }
528                         dev->mem_start = memaddrs[i];
529                         size = 0x2000; /* check for 8K mem */
530                         if (check586(dev, size))
531                                 /* 8K-check */
532                                 break;
533                         size = 0x4000; /* check for 16K mem */
534                         if (check586(dev, size))
535                                 /* 16K-check */
536                                 break;
537                 }
538         }
539         /* set mem_end showed by 'ifconfig' */
540         dev->mem_end = dev->mem_start + size;
541 #endif
542
543         alloc586(dev);
544
545         /* set number of receive-buffs according to memsize */
546         if (size == 0x2000)
547                 priv->num_recv_buffs = NUM_RECV_BUFFS_8;
548         else
549                 priv->num_recv_buffs = NUM_RECV_BUFFS_16;
550
551         printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
552                                 dev->mem_start, size);
553
554         if (dev->irq < 2) {
555                 unsigned long irq_mask;
556
557                 irq_mask = probe_irq_on();
558                 ni_reset586();
559                 ni_attn586();
560
561                 mdelay(20);
562                 dev->irq = probe_irq_off(irq_mask);
563                 if (!dev->irq) {
564                         printk("?autoirq, Failed to detect IRQ line!\n");
565                         retval = -EAGAIN;
566                         iounmap(priv->mapped);
567                         goto out;
568                 }
569                 printk("IRQ %d (autodetected).\n", dev->irq);
570         } else {
571                 if (dev->irq == 2)
572                         dev->irq = 9;
573                 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
574         }
575
576         dev->netdev_ops         = &ni52_netdev_ops;
577         dev->watchdog_timeo     = HZ/20;
578
579         return 0;
580 out:
581         release_region(ioaddr, NI52_TOTAL_SIZE);
582         return retval;
583 }
584
585 /**********************************************
586  * init the chip (ni52-interrupt should be disabled?!)
587  * needs a correct 'allocated' memory
588  */
589
590 static int init586(struct net_device *dev)
591 {
592         void __iomem *ptr;
593         int i, result = 0;
594         struct priv *p = netdev_priv(dev);
595         struct configure_cmd_struct __iomem *cfg_cmd;
596         struct iasetup_cmd_struct __iomem *ias_cmd;
597         struct tdr_cmd_struct __iomem *tdr_cmd;
598         struct mcsetup_cmd_struct __iomem *mc_cmd;
599         struct dev_mc_list *dmi = dev->mc_list;
600         int num_addrs = dev->mc_count;
601
602         ptr = p->scb + 1;
603
604         cfg_cmd = ptr; /* configure-command */
605         writew(0, &cfg_cmd->cmd_status);
606         writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
607         writew(0xFFFF, &cfg_cmd->cmd_link);
608
609         /* number of cfg bytes */
610         writeb(0x0a, &cfg_cmd->byte_cnt);
611         /* fifo-limit (8=tx:32/rx:64) */
612         writeb(fifo, &cfg_cmd->fifo);
613         /* hold or discard bad recv frames (bit 7) */
614         writeb(0x40, &cfg_cmd->sav_bf);
615         /* addr_len |!src_insert |pre-len |loopback */
616         writeb(0x2e, &cfg_cmd->adr_len);
617         writeb(0x00, &cfg_cmd->priority);
618         writeb(0x60, &cfg_cmd->ifs);;
619         writeb(0x00, &cfg_cmd->time_low);
620         writeb(0xf2, &cfg_cmd->time_high);
621         writeb(0x00, &cfg_cmd->promisc);;
622         if (dev->flags & IFF_ALLMULTI) {
623                 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
624                 if (num_addrs > len) {
625                         printk(KERN_ERR "%s: switching to promisc. mode\n",
626                                 dev->name);
627                         writeb(0x01, &cfg_cmd->promisc);
628                 }
629         }
630         if (dev->flags & IFF_PROMISC)
631                 writeb(0x01, &cfg_cmd->promisc);
632         writeb(0x00, &cfg_cmd->carr_coll);
633         writew(make16(cfg_cmd), &p->scb->cbl_offset);
634         writeb(0, &p->scb->cmd_ruc);
635
636         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
637         ni_attn586();
638
639         wait_for_stat_compl(cfg_cmd);
640
641         if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
642                                                         (STAT_COMPL|STAT_OK)) {
643                 printk(KERN_ERR "%s: configure command failed: %x\n",
644                                 dev->name, readw(&cfg_cmd->cmd_status));
645                 return 1;
646         }
647
648         /*
649          * individual address setup
650          */
651
652         ias_cmd = ptr;
653
654         writew(0, &ias_cmd->cmd_status);
655         writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
656         writew(0xffff, &ias_cmd->cmd_link);
657
658         memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
659
660         writew(make16(ias_cmd), &p->scb->cbl_offset);
661
662         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
663         ni_attn586();
664
665         wait_for_stat_compl(ias_cmd);
666
667         if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
668                                                         (STAT_OK|STAT_COMPL)) {
669                 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
670                 return 1;
671         }
672
673         /*
674          * TDR, wire check .. e.g. no resistor e.t.c
675          */
676
677         tdr_cmd = ptr;
678
679         writew(0, &tdr_cmd->cmd_status);
680         writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
681         writew(0xffff, &tdr_cmd->cmd_link);
682         writew(0, &tdr_cmd->status);
683
684         writew(make16(tdr_cmd), &p->scb->cbl_offset);
685         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
686         ni_attn586();
687
688         wait_for_stat_compl(tdr_cmd);
689
690         if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
691                 printk(KERN_ERR "%s: Problems while running the TDR.\n",
692                                 dev->name);
693         else {
694                 udelay(16);
695                 result = readw(&tdr_cmd->status);
696                 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
697                 ni_attn586(); /* ack the interrupts */
698
699                 if (result & TDR_LNK_OK)
700                         ;
701                 else if (result & TDR_XCVR_PRB)
702                         printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
703                                 dev->name);
704                 else if (result & TDR_ET_OPN)
705                         printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
706                                 dev->name, result & TDR_TIMEMASK);
707                 else if (result & TDR_ET_SRT) {
708                         /* time == 0 -> strange :-) */
709                         if (result & TDR_TIMEMASK)
710                                 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
711                                         dev->name, result & TDR_TIMEMASK);
712                 } else
713                         printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
714                                                 dev->name, result);
715         }
716
717         /*
718          * Multicast setup
719          */
720         if (num_addrs && !(dev->flags & IFF_PROMISC)) {
721                 mc_cmd = ptr;
722                 writew(0, &mc_cmd->cmd_status);
723                 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
724                 writew(0xffff, &mc_cmd->cmd_link);
725                 writew(num_addrs * 6, &mc_cmd->mc_cnt);
726
727                 for (i = 0; i < num_addrs; i++, dmi = dmi->next)
728                         memcpy_toio(mc_cmd->mc_list[i],
729                                                         dmi->dmi_addr, 6);
730
731                 writew(make16(mc_cmd), &p->scb->cbl_offset);
732                 writeb(CUC_START, &p->scb->cmd_cuc);
733                 ni_attn586();
734
735                 wait_for_stat_compl(mc_cmd);
736
737                 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
738                                                  != (STAT_COMPL|STAT_OK))
739                         printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
740         }
741
742         /*
743          * alloc nop/xmit-cmds
744          */
745 #if (NUM_XMIT_BUFFS == 1)
746         for (i = 0; i < 2; i++) {
747                 p->nop_cmds[i] = ptr;
748                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
749                 writew(0, &p->nop_cmds[i]->cmd_status);
750                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
751                 ptr = ptr + sizeof(struct nop_cmd_struct);
752         }
753 #else
754         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
755                 p->nop_cmds[i] = ptr;
756                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
757                 writew(0, &p->nop_cmds[i]->cmd_status);
758                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
759                 ptr = ptr + sizeof(struct nop_cmd_struct);
760         }
761 #endif
762
763         ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
764
765         /*
766          * alloc xmit-buffs / init xmit_cmds
767          */
768         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
769                 /* Transmit cmd/buff 0 */
770                 p->xmit_cmds[i] = ptr;
771                 ptr = ptr + sizeof(struct transmit_cmd_struct);
772                 p->xmit_cbuffs[i] = ptr; /* char-buffs */
773                 ptr = ptr + XMIT_BUFF_SIZE;
774                 p->xmit_buffs[i] = ptr; /* TBD */
775                 ptr = ptr + sizeof(struct tbd_struct);
776                 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
777                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
778                                 dev->name);
779                         return 1;
780                 }
781                 memset_io(p->xmit_cmds[i], 0,
782                                         sizeof(struct transmit_cmd_struct));
783                 memset_io(p->xmit_buffs[i], 0,
784                                         sizeof(struct tbd_struct));
785                 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
786                                         &p->xmit_cmds[i]->cmd_link);
787                 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
788                 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
789                 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
790                 writew(0xffff, &p->xmit_buffs[i]->next);
791                 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
792         }
793
794         p->xmit_count = 0;
795         p->xmit_last    = 0;
796 #ifndef NO_NOPCOMMANDS
797         p->nop_point    = 0;
798 #endif
799
800          /*
801                 * 'start transmitter'
802                 */
803 #ifndef NO_NOPCOMMANDS
804         writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
805         writeb(CUC_START, &p->scb->cmd_cuc);
806         ni_attn586();
807         wait_for_scb_cmd(dev);
808 #else
809         writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
810         writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
811 #endif
812
813         /*
814          * ack. interrupts
815          */
816         writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
817         ni_attn586();
818         udelay(16);
819
820         ni_enaint();
821
822         return 0;
823 }
824
825 /******************************************************
826  * This is a helper routine for ni52_rnr_int() and init586().
827  * It sets up the Receive Frame Area (RFA).
828  */
829
830 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
831 {
832         struct rfd_struct __iomem *rfd = ptr;
833         struct rbd_struct __iomem *rbd;
834         int i;
835         struct priv *p = netdev_priv(dev);
836
837         memset_io(rfd, 0,
838                 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
839         p->rfd_first = rfd;
840
841         for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
842                 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
843                         &rfd[i].next);
844                 writew(0xffff, &rfd[i].rbd_offset);
845         }
846         /* RU suspend */
847         writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
848
849         ptr = rfd + (p->num_recv_buffs + rfdadd);
850
851         rbd = ptr;
852         ptr = rbd + p->num_recv_buffs;
853
854          /* clr descriptors */
855         memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
856
857         for (i = 0; i < p->num_recv_buffs; i++) {
858                 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
859                 writew(RECV_BUFF_SIZE, &rbd[i].size);
860                 writel(make24(ptr), &rbd[i].buffer);
861                 ptr = ptr + RECV_BUFF_SIZE;
862         }
863         p->rfd_top      = p->rfd_first;
864         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
865
866         writew(make16(p->rfd_first), &p->scb->rfa_offset);
867         writew(make16(rbd), &p->rfd_first->rbd_offset);
868
869         return ptr;
870 }
871
872
873 /**************************************************
874  * Interrupt Handler ...
875  */
876
877 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
878 {
879         struct net_device *dev = dev_id;
880         unsigned int stat;
881         int cnt = 0;
882         struct priv *p;
883
884         p = netdev_priv(dev);
885
886         if (debuglevel > 1)
887                 printk("I");
888
889         spin_lock(&p->spinlock);
890
891         wait_for_scb_cmd(dev); /* wait for last command */
892
893         while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
894                 writeb(stat, &p->scb->cmd_cuc);
895                 ni_attn586();
896
897                 if (stat & STAT_FR)      /* received a frame */
898                         ni52_rcv_int(dev);
899
900                 if (stat & STAT_RNR) { /* RU went 'not ready' */
901                         printk("(R)");
902                         if (readb(&p->scb->rus) & RU_SUSPEND) {
903                                 /* special case: RU_SUSPEND */
904                                 wait_for_scb_cmd(dev);
905                                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
906                                 ni_attn586();
907                                 wait_for_scb_cmd_ruc(dev);
908                         } else {
909                                 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
910                                         dev->name, stat, readb(&p->scb->rus));
911                                 ni52_rnr_int(dev);
912                         }
913                 }
914
915                 /* Command with I-bit set complete */
916                 if (stat & STAT_CX)
917                          ni52_xmt_int(dev);
918
919 #ifndef NO_NOPCOMMANDS
920                 if (stat & STAT_CNA) {  /* CU went 'not ready' */
921                         if (netif_running(dev))
922                                 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
923                                         dev->name, stat, readb(&p->scb->cus));
924                 }
925 #endif
926
927                 if (debuglevel > 1)
928                         printk("%d", cnt++);
929
930                 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
931                 wait_for_scb_cmd(dev);
932                 if (readb(&p->scb->cmd_cuc)) {   /* timed out? */
933                         printk(KERN_ERR "%s: Acknowledge timed out.\n",
934                                 dev->name);
935                         ni_disint();
936                         break;
937                 }
938         }
939         spin_unlock(&p->spinlock);
940
941         if (debuglevel > 1)
942                 printk("i");
943         return IRQ_HANDLED;
944 }
945
946 /*******************************************************
947  * receive-interrupt
948  */
949
950 static void ni52_rcv_int(struct net_device *dev)
951 {
952         int status, cnt = 0;
953         unsigned short totlen;
954         struct sk_buff *skb;
955         struct rbd_struct __iomem *rbd;
956         struct priv *p = netdev_priv(dev);
957
958         if (debuglevel > 0)
959                 printk("R");
960
961         for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
962                 rbd = make32(readw(&p->rfd_top->rbd_offset));
963                 if (status & RFD_OK) { /* frame received without error? */
964                         totlen = readw(&rbd->status);
965                         if (totlen & RBD_LAST) {
966                                 /* the first and the last buffer? */
967                                 totlen &= RBD_MASK; /* length of this frame */
968                                 writew(0x00, &rbd->status);
969                                 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
970                                 if (skb != NULL) {
971                                         skb_reserve(skb, 2);
972                                         skb_put(skb, totlen);
973                                         memcpy_fromio(skb->data, p->base + readl(&rbd->buffer), totlen);
974                                         skb->protocol = eth_type_trans(skb, dev);
975                                         netif_rx(skb);
976                                         p->stats.rx_packets++;
977                                         p->stats.rx_bytes += totlen;
978                                 } else
979                                         p->stats.rx_dropped++;
980                         } else {
981                                 int rstat;
982                                  /* free all RBD's until RBD_LAST is set */
983                                 totlen = 0;
984                                 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
985                                         totlen += rstat & RBD_MASK;
986                                         if (!rstat) {
987                                                 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
988                                                 break;
989                                         }
990                                         writew(0, &rbd->status);
991                                         rbd = make32(readw(&rbd->next));
992                                 }
993                                 totlen += rstat & RBD_MASK;
994                                 writew(0, &rbd->status);
995                                 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
996                                         dev->name, totlen);
997                                 p->stats.rx_dropped++;
998                          }
999                 } else {/* frame !(ok), only with 'save-bad-frames' */
1000                         printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
1001                                 dev->name, status);
1002                         p->stats.rx_errors++;
1003                 }
1004                 writeb(0, &p->rfd_top->stat_high);
1005                 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
1006                 writew(0xffff, &p->rfd_top->rbd_offset);
1007                 writeb(0, &p->rfd_last->last);  /* delete RFD_SUSP      */
1008                 p->rfd_last = p->rfd_top;
1009                 p->rfd_top = make32(readw(&p->rfd_top->next)); /* step to next RFD */
1010                 writew(make16(p->rfd_top), &p->scb->rfa_offset);
1011
1012                 if (debuglevel > 0)
1013                         printk("%d", cnt++);
1014         }
1015
1016         if (automatic_resume) {
1017                 wait_for_scb_cmd(dev);
1018                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1019                 ni_attn586();
1020                 wait_for_scb_cmd_ruc(dev);
1021         }
1022
1023 #ifdef WAIT_4_BUSY
1024         {
1025                 int i;
1026                 for (i = 0; i < 1024; i++) {
1027                         if (p->rfd_top->status)
1028                                 break;
1029                         udelay(16);
1030                         if (i == 1023)
1031                                 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1032                 }
1033         }
1034 #endif
1035         if (debuglevel > 0)
1036                 printk("r");
1037 }
1038
1039 /**********************************************************
1040  * handle 'Receiver went not ready'.
1041  */
1042
1043 static void ni52_rnr_int(struct net_device *dev)
1044 {
1045         struct priv *p = netdev_priv(dev);
1046
1047         p->stats.rx_errors++;
1048
1049         wait_for_scb_cmd(dev);          /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1050         writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1051         ni_attn586();
1052         wait_for_scb_cmd_ruc(dev);              /* wait for accept cmd. */
1053
1054         alloc_rfa(dev, p->rfd_first);
1055         /* maybe add a check here, before restarting the RU */
1056         startrecv586(dev); /* restart RU */
1057
1058         printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n",
1059                 dev->name, readb(&p->scb->rus));
1060
1061 }
1062
1063 /**********************************************************
1064  * handle xmit - interrupt
1065  */
1066
1067 static void ni52_xmt_int(struct net_device *dev)
1068 {
1069         int status;
1070         struct priv *p = netdev_priv(dev);
1071
1072         if (debuglevel > 0)
1073                 printk("X");
1074
1075         status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1076         if (!(status & STAT_COMPL))
1077                 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1078
1079         if (status & STAT_OK) {
1080                 p->stats.tx_packets++;
1081                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1082         } else {
1083                 p->stats.tx_errors++;
1084                 if (status & TCMD_LATECOLL) {
1085                         printk(KERN_ERR "%s: late collision detected.\n",
1086                                 dev->name);
1087                         p->stats.collisions++;
1088                 } else if (status & TCMD_NOCARRIER) {
1089                         p->stats.tx_carrier_errors++;
1090                         printk(KERN_ERR "%s: no carrier detected.\n",
1091                                 dev->name);
1092                 } else if (status & TCMD_LOSTCTS)
1093                         printk(KERN_ERR "%s: loss of CTS detected.\n",
1094                                 dev->name);
1095                 else if (status & TCMD_UNDERRUN) {
1096                         p->stats.tx_fifo_errors++;
1097                         printk(KERN_ERR "%s: DMA underrun detected.\n",
1098                                 dev->name);
1099                 } else if (status & TCMD_MAXCOLL) {
1100                         printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1101                                 dev->name);
1102                         p->stats.collisions += 16;
1103                 }
1104         }
1105 #if (NUM_XMIT_BUFFS > 1)
1106         if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1107                 p->xmit_last = 0;
1108 #endif
1109         netif_wake_queue(dev);
1110 }
1111
1112 /***********************************************************
1113  * (re)start the receiver
1114  */
1115
1116 static void startrecv586(struct net_device *dev)
1117 {
1118         struct priv *p = netdev_priv(dev);
1119
1120         wait_for_scb_cmd(dev);
1121         wait_for_scb_cmd_ruc(dev);
1122         writew(make16(p->rfd_first), &p->scb->rfa_offset);
1123         writeb(RUC_START, &p->scb->cmd_ruc);
1124         ni_attn586();           /* start cmd. */
1125         wait_for_scb_cmd_ruc(dev);
1126         /* wait for accept cmd. (no timeout!!) */
1127 }
1128
1129 static void ni52_timeout(struct net_device *dev)
1130 {
1131         struct priv *p = netdev_priv(dev);
1132 #ifndef NO_NOPCOMMANDS
1133         if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1134                 netif_wake_queue(dev);
1135 #ifdef DEBUG
1136                 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1137                         dev->name);
1138                 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1139                         dev->name, (int)p->xmit_cmds[0]->cmd_status,
1140                         readw(&p->nop_cmds[0]->cmd_status),
1141                         readw(&p->nop_cmds[1]->cmd_status),
1142                         p->nop_point);
1143 #endif
1144                 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1145                 ni_attn586();
1146                 wait_for_scb_cmd(dev);
1147                 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1148                 writeb(CUC_START, &p->scb->cmd_cuc);
1149                 ni_attn586();
1150                 wait_for_scb_cmd(dev);
1151                 dev->trans_start = jiffies;
1152                 return 0;
1153         }
1154 #endif
1155         {
1156 #ifdef DEBUG
1157                 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1158                                 dev->name, readb(&p->scb->cus));
1159                 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1160                                 dev->name,
1161                                 readw(&p->xmit_cmds[0]->cmd_status),
1162                                 readw(&p->xmit_cmds[1]->cmd_status));
1163                 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1164                                 dev->name);
1165 #endif
1166                 ni52_close(dev);
1167                 ni52_open(dev);
1168         }
1169         dev->trans_start = jiffies;
1170 }
1171
1172 /******************************************************
1173  * send frame
1174  */
1175
1176 static int ni52_send_packet(struct sk_buff *skb, 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 0;
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                 dev->trans_start = jiffies;
1222                 if (!i)
1223                         dev_kfree_skb(skb);
1224                 wait_for_scb_cmd(dev);
1225                 /* test it, because CU sometimes doesn't start immediately */
1226                 if (readb(&p->scb->cus) & CU_ACTIVE)
1227                         break;
1228                 if (readw(&p->xmit_cmds[0]->cmd_status))
1229                         break;
1230                 if (i == 15)
1231                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1232         }
1233 #       else
1234         next_nop = (p->nop_point + 1) & 0x1;
1235         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1236         writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1237         writew(make16(p->nop_cmds[next_nop]),
1238                                 &p->nop_cmds[next_nop]->cmd_link);
1239         writew(0, &p->xmit_cmds[0]->cmd_status);
1240         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1241
1242         writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1243         dev->trans_start = jiffies;
1244         p->nop_point = next_nop;
1245         dev_kfree_skb(skb);
1246 #       endif
1247 #else
1248         writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1249         next_nop = p->xmit_count + 1
1250         if (next_nop == NUM_XMIT_BUFFS)
1251                 next_nop = 0;
1252         writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1253         /* linkpointer of xmit-command already points to next nop cmd */
1254         writew(make16(p->nop_cmds[next_nop]),
1255                                 &p->nop_cmds[next_nop]->cmd_link);
1256         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1257         writew(make16(p->xmit_cmds[p->xmit_count]),
1258                                 &p->nop_cmds[p->xmit_count]->cmd_link);
1259         dev->trans_start = jiffies;
1260         p->xmit_count = next_nop;
1261         {
1262                 unsigned long flags;
1263                 spin_lock_irqsave(&p->spinlock);
1264                 if (p->xmit_count != p->xmit_last)
1265                         netif_wake_queue(dev);
1266                 spin_unlock_irqrestore(&p->spinlock);
1267         }
1268         dev_kfree_skb(skb);
1269 #endif
1270         return 0;
1271 }
1272
1273 /*******************************************
1274  * Someone wanna have the statistics
1275  */
1276
1277 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1278 {
1279         struct priv *p = netdev_priv(dev);
1280         unsigned short crc, aln, rsc, ovrn;
1281
1282         /* Get error-statistics from the ni82586 */
1283         crc = readw(&p->scb->crc_errs);
1284         writew(0, &p->scb->crc_errs);
1285         aln = readw(&p->scb->aln_errs);
1286         writew(0, &p->scb->aln_errs);
1287         rsc = readw(&p->scb->rsc_errs);
1288         writew(0, &p->scb->rsc_errs);
1289         ovrn = readw(&p->scb->ovrn_errs);
1290         writew(0, &p->scb->ovrn_errs);
1291
1292         p->stats.rx_crc_errors += crc;
1293         p->stats.rx_fifo_errors += ovrn;
1294         p->stats.rx_frame_errors += aln;
1295         p->stats.rx_dropped += rsc;
1296
1297         return &p->stats;
1298 }
1299
1300 /********************************************************
1301  * Set MC list ..
1302  */
1303
1304 static void set_multicast_list(struct net_device *dev)
1305 {
1306         netif_stop_queue(dev);
1307         ni_disint();
1308         alloc586(dev);
1309         init586(dev);
1310         startrecv586(dev);
1311         ni_enaint();
1312         netif_wake_queue(dev);
1313 }
1314
1315 #ifdef MODULE
1316 static struct net_device *dev_ni52;
1317
1318 module_param(io, int, 0);
1319 module_param(irq, int, 0);
1320 module_param(memstart, long, 0);
1321 module_param(memend, long, 0);
1322 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1323 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1324 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1325 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1326
1327 int __init init_module(void)
1328 {
1329         if (io <= 0x0 || !memend || !memstart || irq < 2) {
1330                 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1331                 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1332                 return -ENODEV;
1333         }
1334         dev_ni52 = ni52_probe(-1);
1335         if (IS_ERR(dev_ni52))
1336                 return PTR_ERR(dev_ni52);
1337         return 0;
1338 }
1339
1340 void __exit cleanup_module(void)
1341 {
1342         struct priv *p = netdev_priv(dev_ni52);
1343         unregister_netdev(dev_ni52);
1344         iounmap(p->mapped);
1345         release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1346         free_netdev(dev_ni52);
1347 }
1348 #endif /* MODULE */
1349
1350 MODULE_LICENSE("GPL");