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