10cfd0f91fc081e1957f28ec997adf41c57351f2
[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  *   compile with:
13  *       gcc -O2 -fomit-frame-pointer -m486 -D__KERNEL__ -DMODULE -c ni52.c
14  *   run with e.g:
15  *       insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000
16  *
17  * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!.
18  *
19  * If you find a bug, please report me:
20  *   The kernel panic output and any kmsg from the ni52 driver
21  *   the ni5210-driver-version and the linux-kernel version
22  *   how many shared memory (memsize) on the netcard,
23  *   bootprom: yes/no, base_addr, mem_start
24  *   maybe the ni5210-card revision and the i82586 version
25  *
26  * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340
27  *                mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000,
28  *                           0xd8000,0xcc000,0xce000,0xda000,0xdc000
29  *
30  * sources:
31  *   skeleton.c from Donald Becker
32  *
33  * I have also done a look in the following sources: (mail me if you need them)
34  *   crynwr-packet-driver by Russ Nelson
35  *   Garret A. Wollman's (fourth) i82586-driver for BSD
36  *   (before getting an i82596 (yes 596 not 586) manual, the existing drivers
37  *    helped me a lot to understand this tricky chip.)
38  *
39  * Known Problems:
40  *   The internal sysbus seems to be slow. So we often lose packets because of
41  *   overruns while receiving from a fast remote host.
42  *   This can slow down TCP connections. Maybe the newer ni5210 cards are
43  *   better. My experience is, that if a machine sends with more than about
44  *   500-600K/s the fifo/sysbus overflows.
45  *
46  * IMPORTANT NOTE:
47  *   On fast networks, it's a (very) good idea to have 16K shared memory. With
48  *   8K, we can store only 4 receive frames, so it can (easily) happen that a
49  *   remote machine 'overruns' our system.
50  *
51  * Known i82586/card problems (I'm sure, there are many more!):
52  *   Running the NOP-mode, the i82586 sometimes seems to forget to report
53  *   every xmit-interrupt until we restart the CU.
54  *   Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit
55  *   in the RBD-Struct which indicates an end of the RBD queue.
56  *   Instead, the RU fetches another (randomly selected and
57  *   usually used) RBD and begins to fill it. (Maybe, this happens only if
58  *   the last buffer from the previous RFD fits exact into the queue and
59  *   the next RFD can't fetch an initial RBD. Anyone knows more? )
60  *
61  * results from ftp performance tests with Linux 1.2.5
62  *   send and receive about 350-400 KByte/s (peak up to 460 kbytes/s)
63  *   sending in NOP-mode: peak performance up to 530K/s (but better don't
64  *   run this mode)
65  */
66
67 /*
68  * 29.Sept.96: virt_to_bus changes for new memory scheme
69  * 19.Feb.96: more Mcast changes, module support (MH)
70  *
71  * 18.Nov.95: Mcast changes (AC).
72  *
73  * 23.April.95: fixed(?) receiving problems by configuring a RFD more
74  *              than the number of RBD's. Can maybe cause other problems.
75  * 18.April.95: Added MODULE support (MH)
76  * 17.April.95: MC related changes in init586() and set_multicast_list().
77  *              removed use of 'jiffies' in init586() (MH)
78  *
79  * 19.Sep.94: Added Multicast support (not tested yet) (MH)
80  *
81  * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling.
82  *            Now, every RFD has exact one RBD. (MH)
83  *
84  * 14.Sep.94: added promiscuous mode, a few cleanups (MH)
85  *
86  * 19.Aug.94: changed request_irq() parameter (MH)
87  *
88  * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)
89  *
90  * 19.July.94: lotsa cleanups .. (MH)
91  *
92  * 17.July.94: some patches ... verified to run with 1.1.29 (MH)
93  *
94  * 4.July.94: patches for Linux 1.1.24  (MH)
95  *
96  * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)
97  *
98  * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff,
99  *                              too (MH)
100  *
101  * < 30.Sep.93: first versions
102  */
103
104 static int debuglevel;  /* debug-printk 0: off 1: a few 2: more */
105 static int automatic_resume; /* experimental .. better should be zero */
106 static int rfdadd;      /* rfdadd=1 may be better for 8K MEM cards */
107 static int fifo = 0x8;  /* don't change */
108
109 #include <linux/module.h>
110 #include <linux/kernel.h>
111 #include <linux/string.h>
112 #include <linux/errno.h>
113 #include <linux/ioport.h>
114 #include <linux/slab.h>
115 #include <linux/interrupt.h>
116 #include <linux/delay.h>
117 #include <linux/init.h>
118 #include <linux/bitops.h>
119 #include <asm/io.h>
120
121 #include <linux/netdevice.h>
122 #include <linux/etherdevice.h>
123 #include <linux/skbuff.h>
124
125 #include "ni52.h"
126
127 #define DRV_NAME "ni52"
128
129 #define DEBUG       /* debug on */
130 #define SYSBUSVAL 1 /* 8 Bit */
131
132 #define ni_attn586()  { outb(0, dev->base_addr + NI52_ATTENTION); }
133 #define ni_reset586() { outb(0, dev->base_addr + NI52_RESET); }
134 #define ni_disint()   { outb(0, dev->base_addr + NI52_INTDIS); }
135 #define ni_enaint()   { outb(0, dev->base_addr + NI52_INTENA); }
136
137 #define make32(ptr16) ((void __iomem *)(p->memtop + (short) (ptr16)))
138 #define make24(ptr32) ((char __iomem *)(ptr32)) - p->base
139 #define make16(ptr32) ((unsigned short) ((char __iomem *)(ptr32)\
140                                         - p->memtop))
141
142 /******************* how to calculate the buffers *****************************
143
144   * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
145   * --------------- in a different (more stable?) mode. Only in this mode it's
146   *                 possible to configure the driver with 'NO_NOPCOMMANDS'
147
148 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
149 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
150 sizeof(rfd) = 24; sizeof(rbd) = 12;
151 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
152 sizeof(nop_cmd) = 8;
153
154   * if you don't know the driver, better do not change these values: */
155
156 #define RECV_BUFF_SIZE 1524 /* slightly oversized */
157 #define XMIT_BUFF_SIZE 1524 /* slightly oversized */
158 #define NUM_XMIT_BUFFS 1    /* config for both, 8K and 16K shmem */
159 #define NUM_RECV_BUFFS_8  4 /* config for 8K shared mem */
160 #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
161 #define NO_NOPCOMMANDS      /* only possible with NUM_XMIT_BUFFS=1 */
162
163 /**************************************************************************/
164
165
166 #define NI52_TOTAL_SIZE 16
167 #define NI52_ADDR0 0x02
168 #define NI52_ADDR1 0x07
169 #define NI52_ADDR2 0x01
170
171 static int     ni52_probe1(struct net_device *dev, int ioaddr);
172 static irqreturn_t ni52_interrupt(int irq, void *dev_id);
173 static int     ni52_open(struct net_device *dev);
174 static int     ni52_close(struct net_device *dev);
175 static int     ni52_send_packet(struct sk_buff *, struct net_device *);
176 static struct  net_device_stats *ni52_get_stats(struct net_device *dev);
177 static void    set_multicast_list(struct net_device *dev);
178 static void    ni52_timeout(struct net_device *dev);
179
180 /* helper-functions */
181 static int     init586(struct net_device *dev);
182 static int     check586(struct net_device *dev, unsigned size);
183 static void    alloc586(struct net_device *dev);
184 static void    startrecv586(struct net_device *dev);
185 static void   __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr);
186 static void    ni52_rcv_int(struct net_device *dev);
187 static void    ni52_xmt_int(struct net_device *dev);
188 static void    ni52_rnr_int(struct net_device *dev);
189
190 struct priv {
191         struct net_device_stats stats;
192         char __iomem *base;
193         char __iomem *mapped;
194         char __iomem *memtop;
195         spinlock_t spinlock;
196         int reset;
197         struct rfd_struct __iomem *rfd_last, *rfd_top, *rfd_first;
198         struct scp_struct __iomem *scp;
199         struct iscp_struct __iomem *iscp;
200         struct scb_struct __iomem *scb;
201         struct tbd_struct __iomem *xmit_buffs[NUM_XMIT_BUFFS];
202 #if (NUM_XMIT_BUFFS == 1)
203         struct transmit_cmd_struct __iomem *xmit_cmds[2];
204         struct nop_cmd_struct __iomem *nop_cmds[2];
205 #else
206         struct transmit_cmd_struct __iomem *xmit_cmds[NUM_XMIT_BUFFS];
207         struct nop_cmd_struct __iomem *nop_cmds[NUM_XMIT_BUFFS];
208 #endif
209         int nop_point, num_recv_buffs;
210         char __iomem *xmit_cbuffs[NUM_XMIT_BUFFS];
211         int xmit_count, xmit_last;
212 };
213
214 /* wait for command with timeout: */
215 static void wait_for_scb_cmd(struct net_device *dev)
216 {
217         struct priv *p = netdev_priv(dev);
218         int i;
219         for (i = 0; i < 16384; i++) {
220                 if (readb(&p->scb->cmd_cuc) == 0)
221                       break;
222                 udelay(4);
223                 if (i == 16383) {
224                         printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",
225                                 dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus));
226                         if (!p->reset) {
227                                 p->reset = 1;
228                                 ni_reset586();
229                         }
230                 }
231         }
232 }
233
234 static void wait_for_scb_cmd_ruc(struct net_device *dev)
235 {
236         struct priv *p = netdev_priv(dev);
237         int i;
238         for (i = 0; i < 16384; i++) {
239                 if (readb(&p->scb->cmd_ruc) == 0)
240                         break;
241                 udelay(4);
242                 if (i == 16383) {
243                         printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",
244                                 dev->name, readb(&p->scb->cmd_ruc),
245                                 readb(&p->scb->rus));
246                         if (!p->reset) {
247                                 p->reset = 1;
248                                 ni_reset586();
249                         }
250                 }
251         }
252 }
253
254 static void wait_for_stat_compl(void __iomem *p)
255 {
256         struct nop_cmd_struct __iomem *addr = p;
257         int i;
258         for (i = 0; i < 32767; i++) {
259                 if (readw(&((addr)->cmd_status)) & STAT_COMPL)
260                         break;
261                 udelay(32);
262         }
263 }
264
265 /**********************************************
266  * close device
267  */
268 static int ni52_close(struct net_device *dev)
269 {
270         free_irq(dev->irq, dev);
271         ni_reset586(); /* the hard way to stop the receiver */
272         netif_stop_queue(dev);
273         return 0;
274 }
275
276 /**********************************************
277  * open device
278  */
279 static int ni52_open(struct net_device *dev)
280 {
281         int ret;
282
283         ni_disint();
284         alloc586(dev);
285         init586(dev);
286         startrecv586(dev);
287         ni_enaint();
288
289         ret = request_irq(dev->irq, &ni52_interrupt, 0, dev->name, dev);
290         if (ret) {
291                 ni_reset586();
292                 return ret;
293         }
294         netif_start_queue(dev);
295         return 0; /* most done by init */
296 }
297
298 static int check_iscp(struct net_device *dev, void __iomem *addr)
299 {
300         struct iscp_struct __iomem *iscp = addr;
301         struct priv *p = netdev_priv(dev);
302         memset_io(iscp, 0, sizeof(struct iscp_struct));
303
304         writel(make24(iscp), &p->scp->iscp);
305         writeb(1, &iscp->busy);
306
307         ni_reset586();
308         ni_attn586();
309         mdelay(32);     /* wait a while... */
310         /* i82586 clears 'busy' after successful init */
311         if (readb(&iscp->busy))
312                 return 0;
313         return 1;
314 }
315
316 /**********************************************
317  * Check to see if there's an 82586 out there.
318  */
319 static int check586(struct net_device *dev, unsigned size)
320 {
321         struct priv *p = netdev_priv(dev);
322         int i;
323
324         p->mapped = ioremap(dev->mem_start, size);
325         if (!p->mapped)
326                 return 0;
327
328         p->base = p->mapped + size - 0x01000000;
329         p->memtop = p->mapped + size;
330         p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
331         p->scb  = (struct scb_struct __iomem *) p->mapped;
332         p->iscp = (struct iscp_struct __iomem *)p->scp - 1;
333         memset_io(p->scp, 0, sizeof(struct scp_struct));
334         for (i = 0; i < sizeof(struct scp_struct); i++)
335                 /* memory was writeable? */
336                 if (readb((char __iomem *)p->scp + i))
337                         goto Enodev;
338         writeb(SYSBUSVAL, &p->scp->sysbus);     /* 1 = 8Bit-Bus, 0 = 16 Bit */
339         if (readb(&p->scp->sysbus) != SYSBUSVAL)
340                 goto Enodev;
341
342         if (!check_iscp(dev, p->mapped))
343                 goto Enodev;
344         if (!check_iscp(dev, p->iscp))
345                 goto Enodev;
346         return 1;
347 Enodev:
348         iounmap(p->mapped);
349         return 0;
350 }
351
352 /******************************************************************
353  * set iscp at the right place, called by ni52_probe1 and open586.
354  */
355 static void alloc586(struct net_device *dev)
356 {
357         struct priv *p = netdev_priv(dev);
358
359         ni_reset586();
360         mdelay(32);
361
362         memset_io(p->iscp, 0, sizeof(struct iscp_struct));
363         memset_io(p->scp , 0, sizeof(struct scp_struct));
364
365         writel(make24(p->iscp), &p->scp->iscp);
366         writeb(SYSBUSVAL, &p->scp->sysbus);
367         writew(make16(p->scb), &p->iscp->scb_offset);
368
369         writeb(1, &p->iscp->busy);
370         ni_reset586();
371         ni_attn586();
372
373         mdelay(32);
374
375         if (readb(&p->iscp->busy))
376                 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
377
378         p->reset = 0;
379
380         memset_io(p->scb, 0, sizeof(struct scb_struct));
381 }
382
383 /* set: io,irq,memstart,memend or set it when calling insmod */
384 static int irq = 9;
385 static int io = 0x300;
386 static long memstart;   /* e.g 0xd0000 */
387 static long memend;     /* e.g 0xd4000 */
388
389 /**********************************************
390  * probe the ni5210-card
391  */
392 struct net_device * __init ni52_probe(int unit)
393 {
394         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
395         static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
396         struct priv *p;
397         int *port;
398         int err = 0;
399
400         if (!dev)
401                 return ERR_PTR(-ENOMEM);
402
403         p = netdev_priv(dev);
404
405         if (unit >= 0) {
406                 sprintf(dev->name, "eth%d", unit);
407                 netdev_boot_setup_check(dev);
408                 io = dev->base_addr;
409                 irq = dev->irq;
410                 memstart = dev->mem_start;
411                 memend = dev->mem_end;
412         }
413
414         if (io > 0x1ff) {       /* Check a single specified location. */
415                 err = ni52_probe1(dev, io);
416         } else if (io > 0) {            /* Don't probe at all. */
417                 err = -ENXIO;
418         } else {
419                 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
420                         ;
421                 if (*port)
422                         goto got_it;
423 #ifdef FULL_IO_PROBE
424                 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
425                         ;
426                 if (io < 0x400)
427                         goto got_it;
428 #endif
429                 err = -ENODEV;
430         }
431         if (err)
432                 goto out;
433 got_it:
434         err = register_netdev(dev);
435         if (err)
436                 goto out1;
437         return dev;
438 out1:
439         iounmap(p->mapped);
440         release_region(dev->base_addr, NI52_TOTAL_SIZE);
441 out:
442         free_netdev(dev);
443         return ERR_PTR(err);
444 }
445
446 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
447 {
448         int i, size, retval;
449         struct priv *priv = netdev_priv(dev);
450
451         dev->base_addr = ioaddr;
452         dev->irq = irq;
453         dev->mem_start = memstart;
454         dev->mem_end = memend;
455
456         spin_lock_init(&priv->spinlock);
457
458         if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
459                 return -EBUSY;
460
461         if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
462             !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
463                 retval = -ENODEV;
464                 goto out;
465         }
466
467         for (i = 0; i < ETH_ALEN; i++)
468                 dev->dev_addr[i] = inb(dev->base_addr+i);
469
470         if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
471                  || dev->dev_addr[2] != NI52_ADDR2) {
472                 retval = -ENODEV;
473                 goto out;
474         }
475
476         printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
477                                 dev->name, dev->base_addr);
478
479         /*
480          * check (or search) IO-Memory, 8K and 16K
481          */
482 #ifdef MODULE
483         size = dev->mem_end - dev->mem_start;
484         if (size != 0x2000 && size != 0x4000) {
485                 printk("\n");
486                 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
487                 retval = -ENODEV;
488                 goto out;
489         }
490         if (!check586(dev, size)) {
491                 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
492                 retval = -ENODEV;
493                 goto out;
494         }
495 #else
496         if (dev->mem_start != 0) {
497                 /* no auto-mem-probe */
498                 size = 0x4000; /* check for 16K mem */
499                 if (!check586(dev, size)) {
500                         size = 0x2000; /* check for 8K mem */
501                         if (!check586(dev, size)) {
502                                 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
503                                 retval = -ENODEV;
504                                 goto out;
505                         }
506                 }
507         } else {
508                 static const unsigned long memaddrs[] = {
509                         0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
510                         0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
511                 };
512                 for (i = 0;; i++) {
513                         if (!memaddrs[i]) {
514                                 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
515                                 retval = -ENODEV;
516                                 goto out;
517                         }
518                         dev->mem_start = memaddrs[i];
519                         size = 0x2000; /* check for 8K mem */
520                         if (check586(dev, size))
521                                 /* 8K-check */
522                                 break;
523                         size = 0x4000; /* check for 16K mem */
524                         if (check586(dev, size))
525                                 /* 16K-check */
526                                 break;
527                 }
528         }
529         /* set mem_end showed by 'ifconfig' */
530         dev->mem_end = dev->mem_start + size;
531 #endif
532
533         alloc586(dev);
534
535         /* set number of receive-buffs according to memsize */
536         if (size == 0x2000)
537                 priv->num_recv_buffs = NUM_RECV_BUFFS_8;
538         else
539                 priv->num_recv_buffs = NUM_RECV_BUFFS_16;
540
541         printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
542                                 dev->mem_start, size);
543
544         if (dev->irq < 2) {
545                 unsigned long irq_mask;
546
547                 irq_mask = probe_irq_on();
548                 ni_reset586();
549                 ni_attn586();
550
551                 mdelay(20);
552                 dev->irq = probe_irq_off(irq_mask);
553                 if (!dev->irq) {
554                         printk("?autoirq, Failed to detect IRQ line!\n");
555                         retval = -EAGAIN;
556                         iounmap(priv->mapped);
557                         goto out;
558                 }
559                 printk("IRQ %d (autodetected).\n", dev->irq);
560         } else {
561                 if (dev->irq == 2)
562                         dev->irq = 9;
563                 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
564         }
565
566         dev->open               = ni52_open;
567         dev->stop               = ni52_close;
568         dev->get_stats          = ni52_get_stats;
569         dev->tx_timeout         = ni52_timeout;
570         dev->watchdog_timeo     = HZ/20;
571         dev->hard_start_xmit    = ni52_send_packet;
572         dev->set_multicast_list = set_multicast_list;
573
574         dev->if_port            = 0;
575
576         return 0;
577 out:
578         release_region(ioaddr, NI52_TOTAL_SIZE);
579         return retval;
580 }
581
582 /**********************************************
583  * init the chip (ni52-interrupt should be disabled?!)
584  * needs a correct 'allocated' memory
585  */
586
587 static int init586(struct net_device *dev)
588 {
589         void __iomem *ptr;
590         int i, result = 0;
591         struct priv *p = netdev_priv(dev);
592         struct configure_cmd_struct __iomem *cfg_cmd;
593         struct iasetup_cmd_struct __iomem *ias_cmd;
594         struct tdr_cmd_struct __iomem *tdr_cmd;
595         struct mcsetup_cmd_struct __iomem *mc_cmd;
596         struct dev_mc_list *dmi = dev->mc_list;
597         int num_addrs = dev->mc_count;
598
599         ptr = p->scb + 1;
600
601         cfg_cmd = ptr; /* configure-command */
602         writew(0, &cfg_cmd->cmd_status);
603         writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
604         writew(0xFFFF, &cfg_cmd->cmd_link);
605
606         /* number of cfg bytes */
607         writeb(0x0a, &cfg_cmd->byte_cnt);
608         /* fifo-limit (8=tx:32/rx:64) */
609         writeb(fifo, &cfg_cmd->fifo);
610         /* hold or discard bad recv frames (bit 7) */
611         writeb(0x40, &cfg_cmd->sav_bf);
612         /* addr_len |!src_insert |pre-len |loopback */
613         writeb(0x2e, &cfg_cmd->adr_len);
614         writeb(0x00, &cfg_cmd->priority);
615         writeb(0x60, &cfg_cmd->ifs);;
616         writeb(0x00, &cfg_cmd->time_low);
617         writeb(0xf2, &cfg_cmd->time_high);
618         writeb(0x00, &cfg_cmd->promisc);;
619         if (dev->flags & IFF_ALLMULTI) {
620                 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
621                 if (num_addrs > len) {
622                         printk(KERN_ERR "%s: switching to promisc. mode\n",
623                                 dev->name);
624                         writeb(0x01, &cfg_cmd->promisc);
625                 }
626         }
627         if (dev->flags & IFF_PROMISC)
628                 writeb(0x01, &cfg_cmd->promisc);
629         writeb(0x00, &cfg_cmd->carr_coll);
630         writew(make16(cfg_cmd), &p->scb->cbl_offset);
631         writeb(0, &p->scb->cmd_ruc);
632
633         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
634         ni_attn586();
635
636         wait_for_stat_compl(cfg_cmd);
637
638         if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
639                                                         (STAT_COMPL|STAT_OK)) {
640                 printk(KERN_ERR "%s: configure command failed: %x\n",
641                                 dev->name, readw(&cfg_cmd->cmd_status));
642                 return 1;
643         }
644
645         /*
646          * individual address setup
647          */
648
649         ias_cmd = ptr;
650
651         writew(0, &ias_cmd->cmd_status);
652         writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
653         writew(0xffff, &ias_cmd->cmd_link);
654
655         memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
656
657         writew(make16(ias_cmd), &p->scb->cbl_offset);
658
659         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
660         ni_attn586();
661
662         wait_for_stat_compl(ias_cmd);
663
664         if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
665                                                         (STAT_OK|STAT_COMPL)) {
666                 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
667                 return 1;
668         }
669
670         /*
671          * TDR, wire check .. e.g. no resistor e.t.c
672          */
673
674         tdr_cmd = ptr;
675
676         writew(0, &tdr_cmd->cmd_status);
677         writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
678         writew(0xffff, &tdr_cmd->cmd_link);
679         writew(0, &tdr_cmd->status);
680
681         writew(make16(tdr_cmd), &p->scb->cbl_offset);
682         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
683         ni_attn586();
684
685         wait_for_stat_compl(tdr_cmd);
686
687         if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
688                 printk(KERN_ERR "%s: Problems while running the TDR.\n",
689                                 dev->name);
690         else {
691                 udelay(16);
692                 result = readw(&tdr_cmd->status);
693                 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
694                 ni_attn586(); /* ack the interrupts */
695
696                 if (result & TDR_LNK_OK)
697                         ;
698                 else if (result & TDR_XCVR_PRB)
699                         printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
700                                 dev->name);
701                 else if (result & TDR_ET_OPN)
702                         printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
703                                 dev->name, result & TDR_TIMEMASK);
704                 else if (result & TDR_ET_SRT) {
705                         /* time == 0 -> strange :-) */
706                         if (result & TDR_TIMEMASK)
707                                 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
708                                         dev->name, result & TDR_TIMEMASK);
709                 } else
710                         printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
711                                                 dev->name, result);
712         }
713
714         /*
715          * Multicast setup
716          */
717         if (num_addrs && !(dev->flags & IFF_PROMISC)) {
718                 mc_cmd = ptr;
719                 writew(0, &mc_cmd->cmd_status);
720                 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
721                 writew(0xffff, &mc_cmd->cmd_link);
722                 writew(num_addrs * 6, &mc_cmd->mc_cnt);
723
724                 for (i = 0; i < num_addrs; i++, dmi = dmi->next)
725                         memcpy_toio(mc_cmd->mc_list[i],
726                                                         dmi->dmi_addr, 6);
727
728                 writew(make16(mc_cmd), &p->scb->cbl_offset);
729                 writeb(CUC_START, &p->scb->cmd_cuc);
730                 ni_attn586();
731
732                 wait_for_stat_compl(mc_cmd);
733
734                 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
735                                                  != (STAT_COMPL|STAT_OK))
736                         printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
737         }
738
739         /*
740          * alloc nop/xmit-cmds
741          */
742 #if (NUM_XMIT_BUFFS == 1)
743         for (i = 0; i < 2; i++) {
744                 p->nop_cmds[i] = ptr;
745                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
746                 writew(0, &p->nop_cmds[i]->cmd_status);
747                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
748                 ptr = ptr + sizeof(struct nop_cmd_struct);
749         }
750 #else
751         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
752                 p->nop_cmds[i] = ptr;
753                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
754                 writew(0, &p->nop_cmds[i]->cmd_status);
755                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
756                 ptr = ptr + sizeof(struct nop_cmd_struct);
757         }
758 #endif
759
760         ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
761
762         /*
763          * alloc xmit-buffs / init xmit_cmds
764          */
765         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
766                 /* Transmit cmd/buff 0 */
767                 p->xmit_cmds[i] = ptr;
768                 ptr = ptr + sizeof(struct transmit_cmd_struct);
769                 p->xmit_cbuffs[i] = ptr; /* char-buffs */
770                 ptr = ptr + XMIT_BUFF_SIZE;
771                 p->xmit_buffs[i] = ptr; /* TBD */
772                 ptr = ptr + sizeof(struct tbd_struct);
773                 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
774                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
775                                 dev->name);
776                         return 1;
777                 }
778                 memset_io(p->xmit_cmds[i], 0,
779                                         sizeof(struct transmit_cmd_struct));
780                 memset_io(p->xmit_buffs[i], 0,
781                                         sizeof(struct tbd_struct));
782                 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
783                                         &p->xmit_cmds[i]->cmd_link);
784                 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
785                 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
786                 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
787                 writew(0xffff, &p->xmit_buffs[i]->next);
788                 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
789         }
790
791         p->xmit_count = 0;
792         p->xmit_last    = 0;
793 #ifndef NO_NOPCOMMANDS
794         p->nop_point    = 0;
795 #endif
796
797          /*
798                 * 'start transmitter'
799                 */
800 #ifndef NO_NOPCOMMANDS
801         writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
802         writeb(CUC_START, &p->scb->cmd_cuc);
803         ni_attn586();
804         wait_for_scb_cmd(dev);
805 #else
806         writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
807         writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
808 #endif
809
810         /*
811          * ack. interrupts
812          */
813         writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
814         ni_attn586();
815         udelay(16);
816
817         ni_enaint();
818
819         return 0;
820 }
821
822 /******************************************************
823  * This is a helper routine for ni52_rnr_int() and init586().
824  * It sets up the Receive Frame Area (RFA).
825  */
826
827 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
828 {
829         struct rfd_struct __iomem *rfd = ptr;
830         struct rbd_struct __iomem *rbd;
831         int i;
832         struct priv *p = netdev_priv(dev);
833
834         memset_io(rfd, 0,
835                 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
836         p->rfd_first = rfd;
837
838         for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
839                 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
840                         &rfd[i].next);
841                 writew(0xffff, &rfd[i].rbd_offset);
842         }
843         /* RU suspend */
844         writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
845
846         ptr = rfd + (p->num_recv_buffs + rfdadd);
847
848         rbd = ptr;
849         ptr = rbd + p->num_recv_buffs;
850
851          /* clr descriptors */
852         memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
853
854         for (i = 0; i < p->num_recv_buffs; i++) {
855                 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
856                 writew(RECV_BUFF_SIZE, &rbd[i].size);
857                 writel(make24(ptr), &rbd[i].buffer);
858                 ptr = ptr + RECV_BUFF_SIZE;
859         }
860         p->rfd_top      = p->rfd_first;
861         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
862
863         writew(make16(p->rfd_first), &p->scb->rfa_offset);
864         writew(make16(rbd), &p->rfd_first->rbd_offset);
865
866         return ptr;
867 }
868
869
870 /**************************************************
871  * Interrupt Handler ...
872  */
873
874 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
875 {
876         struct net_device *dev = dev_id;
877         unsigned int stat;
878         int cnt = 0;
879         struct priv *p;
880
881         p = netdev_priv(dev);
882
883         if (debuglevel > 1)
884                 printk("I");
885
886         spin_lock(&p->spinlock);
887
888         wait_for_scb_cmd(dev); /* wait for last command */
889
890         while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
891                 writeb(stat, &p->scb->cmd_cuc);
892                 ni_attn586();
893
894                 if (stat & STAT_FR)      /* received a frame */
895                         ni52_rcv_int(dev);
896
897                 if (stat & STAT_RNR) { /* RU went 'not ready' */
898                         printk("(R)");
899                         if (readb(&p->scb->rus) & RU_SUSPEND) {
900                                 /* special case: RU_SUSPEND */
901                                 wait_for_scb_cmd(dev);
902                                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
903                                 ni_attn586();
904                                 wait_for_scb_cmd_ruc(dev);
905                         } else {
906                                 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
907                                         dev->name, stat, readb(&p->scb->rus));
908                                 ni52_rnr_int(dev);
909                         }
910                 }
911
912                 /* Command with I-bit set complete */
913                 if (stat & STAT_CX)
914                          ni52_xmt_int(dev);
915
916 #ifndef NO_NOPCOMMANDS
917                 if (stat & STAT_CNA) {  /* CU went 'not ready' */
918                         if (netif_running(dev))
919                                 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
920                                         dev->name, stat, readb(&p->scb->cus));
921                 }
922 #endif
923
924                 if (debuglevel > 1)
925                         printk("%d", cnt++);
926
927                 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
928                 wait_for_scb_cmd(dev);
929                 if (readb(&p->scb->cmd_cuc)) {   /* timed out? */
930                         printk(KERN_ERR "%s: Acknowledge timed out.\n",
931                                 dev->name);
932                         ni_disint();
933                         break;
934                 }
935         }
936         spin_unlock(&p->spinlock);
937
938         if (debuglevel > 1)
939                 printk("i");
940         return IRQ_HANDLED;
941 }
942
943 /*******************************************************
944  * receive-interrupt
945  */
946
947 static void ni52_rcv_int(struct net_device *dev)
948 {
949         int status, cnt = 0;
950         unsigned short totlen;
951         struct sk_buff *skb;
952         struct rbd_struct __iomem *rbd;
953         struct priv *p = netdev_priv(dev);
954
955         if (debuglevel > 0)
956                 printk("R");
957
958         for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
959                 rbd = make32(readw(&p->rfd_top->rbd_offset));
960                 if (status & RFD_OK) { /* frame received without error? */
961                         totlen = readw(&rbd->status);
962                         if (totlen & RBD_LAST) {
963                                 /* the first and the last buffer? */
964                                 totlen &= RBD_MASK; /* length of this frame */
965                                 writew(0x00, &rbd->status);
966                                 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
967                                 if (skb != NULL) {
968                                         skb_reserve(skb, 2);
969                                         skb_put(skb, totlen);
970                                         memcpy_fromio(skb->data, p->base + readl(&rbd->buffer), totlen);
971                                         skb->protocol = eth_type_trans(skb, dev);
972                                         netif_rx(skb);
973                                         p->stats.rx_packets++;
974                                         p->stats.rx_bytes += totlen;
975                                 } else
976                                         p->stats.rx_dropped++;
977                         } else {
978                                 int rstat;
979                                  /* free all RBD's until RBD_LAST is set */
980                                 totlen = 0;
981                                 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
982                                         totlen += rstat & RBD_MASK;
983                                         if (!rstat) {
984                                                 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
985                                                 break;
986                                         }
987                                         writew(0, &rbd->status);
988                                         rbd = make32(readw(&rbd->next));
989                                 }
990                                 totlen += rstat & RBD_MASK;
991                                 writew(0, &rbd->status);
992                                 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
993                                         dev->name, totlen);
994                                 p->stats.rx_dropped++;
995                          }
996                 } else {/* frame !(ok), only with 'save-bad-frames' */
997                         printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
998                                 dev->name, status);
999                         p->stats.rx_errors++;
1000                 }
1001                 writeb(0, &p->rfd_top->stat_high);
1002                 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
1003                 writew(0xffff, &p->rfd_top->rbd_offset);
1004                 writeb(0, &p->rfd_last->last);  /* delete RFD_SUSP      */
1005                 p->rfd_last = p->rfd_top;
1006                 p->rfd_top = make32(readw(&p->rfd_top->next)); /* step to next RFD */
1007                 writew(make16(p->rfd_top), &p->scb->rfa_offset);
1008
1009                 if (debuglevel > 0)
1010                         printk("%d", cnt++);
1011         }
1012
1013         if (automatic_resume) {
1014                 wait_for_scb_cmd(dev);
1015                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1016                 ni_attn586();
1017                 wait_for_scb_cmd_ruc(dev);
1018         }
1019
1020 #ifdef WAIT_4_BUSY
1021         {
1022                 int i;
1023                 for (i = 0; i < 1024; i++) {
1024                         if (p->rfd_top->status)
1025                                 break;
1026                         udelay(16);
1027                         if (i == 1023)
1028                                 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1029                 }
1030         }
1031 #endif
1032         if (debuglevel > 0)
1033                 printk("r");
1034 }
1035
1036 /**********************************************************
1037  * handle 'Receiver went not ready'.
1038  */
1039
1040 static void ni52_rnr_int(struct net_device *dev)
1041 {
1042         struct priv *p = netdev_priv(dev);
1043
1044         p->stats.rx_errors++;
1045
1046         wait_for_scb_cmd(dev);          /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1047         writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1048         ni_attn586();
1049         wait_for_scb_cmd_ruc(dev);              /* wait for accept cmd. */
1050
1051         alloc_rfa(dev, p->rfd_first);
1052         /* maybe add a check here, before restarting the RU */
1053         startrecv586(dev); /* restart RU */
1054
1055         printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n",
1056                 dev->name, readb(&p->scb->rus));
1057
1058 }
1059
1060 /**********************************************************
1061  * handle xmit - interrupt
1062  */
1063
1064 static void ni52_xmt_int(struct net_device *dev)
1065 {
1066         int status;
1067         struct priv *p = netdev_priv(dev);
1068
1069         if (debuglevel > 0)
1070                 printk("X");
1071
1072         status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1073         if (!(status & STAT_COMPL))
1074                 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1075
1076         if (status & STAT_OK) {
1077                 p->stats.tx_packets++;
1078                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1079         } else {
1080                 p->stats.tx_errors++;
1081                 if (status & TCMD_LATECOLL) {
1082                         printk(KERN_ERR "%s: late collision detected.\n",
1083                                 dev->name);
1084                         p->stats.collisions++;
1085                 } else if (status & TCMD_NOCARRIER) {
1086                         p->stats.tx_carrier_errors++;
1087                         printk(KERN_ERR "%s: no carrier detected.\n",
1088                                 dev->name);
1089                 } else if (status & TCMD_LOSTCTS)
1090                         printk(KERN_ERR "%s: loss of CTS detected.\n",
1091                                 dev->name);
1092                 else if (status & TCMD_UNDERRUN) {
1093                         p->stats.tx_fifo_errors++;
1094                         printk(KERN_ERR "%s: DMA underrun detected.\n",
1095                                 dev->name);
1096                 } else if (status & TCMD_MAXCOLL) {
1097                         printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1098                                 dev->name);
1099                         p->stats.collisions += 16;
1100                 }
1101         }
1102 #if (NUM_XMIT_BUFFS > 1)
1103         if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1104                 p->xmit_last = 0;
1105 #endif
1106         netif_wake_queue(dev);
1107 }
1108
1109 /***********************************************************
1110  * (re)start the receiver
1111  */
1112
1113 static void startrecv586(struct net_device *dev)
1114 {
1115         struct priv *p = netdev_priv(dev);
1116
1117         wait_for_scb_cmd(dev);
1118         wait_for_scb_cmd_ruc(dev);
1119         writew(make16(p->rfd_first), &p->scb->rfa_offset);
1120         writeb(RUC_START, &p->scb->cmd_ruc);
1121         ni_attn586();           /* start cmd. */
1122         wait_for_scb_cmd_ruc(dev);
1123         /* wait for accept cmd. (no timeout!!) */
1124 }
1125
1126 static void ni52_timeout(struct net_device *dev)
1127 {
1128         struct priv *p = netdev_priv(dev);
1129 #ifndef NO_NOPCOMMANDS
1130         if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1131                 netif_wake_queue(dev);
1132 #ifdef DEBUG
1133                 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1134                         dev->name);
1135                 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1136                         dev->name, (int)p->xmit_cmds[0]->cmd_status,
1137                         readw(&p->nop_cmds[0]->cmd_status),
1138                         readw(&p->nop_cmds[1]->cmd_status),
1139                         p->nop_point);
1140 #endif
1141                 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1142                 ni_attn586();
1143                 wait_for_scb_cmd(dev);
1144                 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1145                 writeb(CUC_START, &p->scb->cmd_cuc);
1146                 ni_attn586();
1147                 wait_for_scb_cmd(dev);
1148                 dev->trans_start = jiffies;
1149                 return 0;
1150         }
1151 #endif
1152         {
1153 #ifdef DEBUG
1154                 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1155                                 dev->name, readb(&p->scb->cus));
1156                 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1157                                 dev->name,
1158                                 readw(&p->xmit_cmds[0]->cmd_status),
1159                                 readw(&p->xmit_cmds[1]->cmd_status));
1160                 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1161                                 dev->name);
1162 #endif
1163                 ni52_close(dev);
1164                 ni52_open(dev);
1165         }
1166         dev->trans_start = jiffies;
1167 }
1168
1169 /******************************************************
1170  * send frame
1171  */
1172
1173 static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
1174 {
1175         int len, i;
1176 #ifndef NO_NOPCOMMANDS
1177         int next_nop;
1178 #endif
1179         struct priv *p = netdev_priv(dev);
1180
1181         if (skb->len > XMIT_BUFF_SIZE) {
1182                 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);
1183                 return 0;
1184         }
1185
1186         netif_stop_queue(dev);
1187
1188         memcpy_toio(p->xmit_cbuffs[p->xmit_count], skb->data, skb->len);
1189         len = skb->len;
1190         if (len < ETH_ZLEN) {
1191                 len = ETH_ZLEN;
1192                 memset_io(p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1193                                                         len - skb->len);
1194         }
1195
1196 #if (NUM_XMIT_BUFFS == 1)
1197 #       ifdef NO_NOPCOMMANDS
1198
1199 #ifdef DEBUG
1200         if (readb(&p->scb->cus) & CU_ACTIVE) {
1201                 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1202                 printk(KERN_ERR "%s: stat: %04x %04x\n",
1203                                 dev->name, readb(&p->scb->cus),
1204                                 readw(&p->xmit_cmds[0]->cmd_status));
1205         }
1206 #endif
1207         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1208         for (i = 0; i < 16; i++) {
1209                 writew(0, &p->xmit_cmds[0]->cmd_status);
1210                 wait_for_scb_cmd(dev);
1211                 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1212                         writeb(CUC_RESUME, &p->scb->cmd_cuc);
1213                 else {
1214                         writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1215                         writeb(CUC_START, &p->scb->cmd_cuc);
1216                 }
1217                 ni_attn586();
1218                 dev->trans_start = jiffies;
1219                 if (!i)
1220                         dev_kfree_skb(skb);
1221                 wait_for_scb_cmd(dev);
1222                 /* test it, because CU sometimes doesn't start immediately */
1223                 if (readb(&p->scb->cus) & CU_ACTIVE)
1224                         break;
1225                 if (readw(&p->xmit_cmds[0]->cmd_status))
1226                         break;
1227                 if (i == 15)
1228                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1229         }
1230 #       else
1231         next_nop = (p->nop_point + 1) & 0x1;
1232         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1233         writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1234         writew(make16(p->nop_cmds[next_nop]),
1235                                 &p->nop_cmds[next_nop]->cmd_link);
1236         writew(0, &p->xmit_cmds[0]->cmd_status);
1237         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1238
1239         writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1240         dev->trans_start = jiffies;
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         dev->trans_start = jiffies;
1257         p->xmit_count = next_nop;
1258         {
1259                 unsigned long flags;
1260                 spin_lock_irqsave(&p->spinlock);
1261                 if (p->xmit_count != p->xmit_last)
1262                         netif_wake_queue(dev);
1263                 spin_unlock_irqrestore(&p->spinlock);
1264         }
1265         dev_kfree_skb(skb);
1266 #endif
1267         return 0;
1268 }
1269
1270 /*******************************************
1271  * Someone wanna have the statistics
1272  */
1273
1274 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1275 {
1276         struct priv *p = netdev_priv(dev);
1277         unsigned short crc, aln, rsc, ovrn;
1278
1279         /* Get error-statistics from the ni82586 */
1280         crc = readw(&p->scb->crc_errs);
1281         writew(0, &p->scb->crc_errs);
1282         aln = readw(&p->scb->aln_errs);
1283         writew(0, &p->scb->aln_errs);
1284         rsc = readw(&p->scb->rsc_errs);
1285         writew(0, &p->scb->rsc_errs);
1286         ovrn = readw(&p->scb->ovrn_errs);
1287         writew(0, &p->scb->ovrn_errs);
1288
1289         p->stats.rx_crc_errors += crc;
1290         p->stats.rx_fifo_errors += ovrn;
1291         p->stats.rx_frame_errors += aln;
1292         p->stats.rx_dropped += rsc;
1293
1294         return &p->stats;
1295 }
1296
1297 /********************************************************
1298  * Set MC list ..
1299  */
1300
1301 static void set_multicast_list(struct net_device *dev)
1302 {
1303         netif_stop_queue(dev);
1304         ni_disint();
1305         alloc586(dev);
1306         init586(dev);
1307         startrecv586(dev);
1308         ni_enaint();
1309         netif_wake_queue(dev);
1310 }
1311
1312 #ifdef MODULE
1313 static struct net_device *dev_ni52;
1314
1315 module_param(io, int, 0);
1316 module_param(irq, int, 0);
1317 module_param(memstart, long, 0);
1318 module_param(memend, long, 0);
1319 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1320 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1321 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1322 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1323
1324 int __init init_module(void)
1325 {
1326         if (io <= 0x0 || !memend || !memstart || irq < 2) {
1327                 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1328                 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1329                 return -ENODEV;
1330         }
1331         dev_ni52 = ni52_probe(-1);
1332         if (IS_ERR(dev_ni52))
1333                 return PTR_ERR(dev_ni52);
1334         return 0;
1335 }
1336
1337 void __exit cleanup_module(void)
1338 {
1339         struct priv *p = netdev_priv(dev_ni52);
1340         unregister_netdev(dev_ni52);
1341         iounmap(p->mapped);
1342         release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1343         free_netdev(dev_ni52);
1344 }
1345 #endif /* MODULE */
1346
1347 MODULE_LICENSE("GPL");
1348
1349 /*
1350  * END: linux/drivers/net/ni52.c
1351  */