drivers/net/apne.c: replace init_module&cleanup_module with module_init&module_exit
[linux-2.6] / 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) (p->memtop + (short) (ptr16))
138 #define make24(ptr32) ((unsigned long)(ptr32)) - p->base
139 #define make16(ptr32) ((unsigned short) ((unsigned long)(ptr32)\
140                                         - (unsigned long) 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, char *where, unsigned size);
183 static void    alloc586(struct net_device *dev);
184 static void    startrecv586(struct net_device *dev);
185 static void   *alloc_rfa(struct net_device *dev, void *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         unsigned long base;
193         char *memtop;
194         spinlock_t spinlock;
195         int reset;
196         struct rfd_struct *rfd_last, *rfd_top, *rfd_first;
197         struct scp_struct *scp;
198         struct iscp_struct *iscp;
199         struct scb_struct *scb;
200         struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
201 #if (NUM_XMIT_BUFFS == 1)
202         struct transmit_cmd_struct *xmit_cmds[2];
203         struct nop_cmd_struct *nop_cmds[2];
204 #else
205         struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
206         struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
207 #endif
208         int nop_point, num_recv_buffs;
209         char *xmit_cbuffs[NUM_XMIT_BUFFS];
210         int xmit_count, xmit_last;
211 };
212
213 /* wait for command with timeout: */
214 static void wait_for_scb_cmd(struct net_device *dev)
215 {
216         struct priv *p = dev->priv;
217         int i;
218         for (i = 0; i < 16384; i++) {
219                 if (readb(&p->scb->cmd_cuc) == 0)
220                       break;
221                 udelay(4);
222                 if (i == 16383) {
223                         printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",
224                                 dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus));
225                         if (!p->reset) {
226                                 p->reset = 1;
227                                 ni_reset586();
228                         }
229                 }
230         }
231 }
232
233 static void wait_for_scb_cmd_ruc(struct net_device *dev)
234 {
235         struct priv *p = dev->priv;
236         int i;
237         for (i = 0; i < 16384; i++) {
238                 if (readb(&p->scb->cmd_ruc) == 0)
239                         break;
240                 udelay(4);
241                 if (i == 16383) {
242                         printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",
243                                 dev->name, p->scb->cmd_ruc, p->scb->rus);
244                         if (!p->reset) {
245                                 p->reset = 1;
246                                 ni_reset586();
247                         }
248                 }
249         }
250 }
251
252 static void wait_for_stat_compl(void *p)
253 {
254         struct nop_cmd_struct *addr = p;
255         int i;
256         for (i = 0; i < 32767; i++) {
257                 if (readw(&((addr)->cmd_status)) & STAT_COMPL)
258                         break;
259                 udelay(32);
260         }
261 }
262
263 /**********************************************
264  * close device
265  */
266 static int ni52_close(struct net_device *dev)
267 {
268         free_irq(dev->irq, dev);
269         ni_reset586(); /* the hard way to stop the receiver */
270         netif_stop_queue(dev);
271         return 0;
272 }
273
274 /**********************************************
275  * open device
276  */
277 static int ni52_open(struct net_device *dev)
278 {
279         int ret;
280
281         ni_disint();
282         alloc586(dev);
283         init586(dev);
284         startrecv586(dev);
285         ni_enaint();
286
287         ret = request_irq(dev->irq, &ni52_interrupt, 0, dev->name, dev);
288         if (ret) {
289                 ni_reset586();
290                 return ret;
291         }
292         netif_start_queue(dev);
293         return 0; /* most done by init */
294 }
295
296 /**********************************************
297  * Check to see if there's an 82586 out there.
298  */
299 static int check586(struct net_device *dev, char *where, unsigned size)
300 {
301         struct priv pb;
302         struct priv *p = /* (struct priv *) dev->priv*/ &pb;
303         char *iscp_addrs[2];
304         int i;
305
306         p->base = (unsigned long) isa_bus_to_virt((unsigned long)where)
307                                                         + size - 0x01000000;
308         p->memtop = isa_bus_to_virt((unsigned long)where) + size;
309         p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
310         memset_io((char *)p->scp, 0, sizeof(struct scp_struct));
311         for (i = 0; i < sizeof(struct scp_struct); i++)
312                 /* memory was writeable? */
313                 if (readb((char *)p->scp + i))
314                         return 0;
315         writeb(SYSBUSVAL, &p->scp->sysbus);     /* 1 = 8Bit-Bus, 0 = 16 Bit */
316         if (readb(&p->scp->sysbus) != SYSBUSVAL)
317                 return 0;
318
319         iscp_addrs[0] = isa_bus_to_virt((unsigned long)where);
320         iscp_addrs[1] = (char *) p->scp - sizeof(struct iscp_struct);
321
322         for (i = 0; i < 2; i++) {
323                 p->iscp = (struct iscp_struct *) iscp_addrs[i];
324                 memset_io((char *)p->iscp, 0, sizeof(struct iscp_struct));
325
326                 writel(make24(p->iscp), &p->scp->iscp);
327                 writeb(1, &p->iscp->busy);
328
329                 ni_reset586();
330                 ni_attn586();
331                 mdelay(32);     /* wait a while... */
332                 /* i82586 clears 'busy' after successful init */
333                 if (readb(&p->iscp->busy))
334                         return 0;
335         }
336         return 1;
337 }
338
339 /******************************************************************
340  * set iscp at the right place, called by ni52_probe1 and open586.
341  */
342 static void alloc586(struct net_device *dev)
343 {
344         struct priv *p =        (struct priv *) dev->priv;
345
346         ni_reset586();
347         mdelay(32);
348
349         spin_lock_init(&p->spinlock);
350
351         p->scp  = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
352         p->scb  = (struct scb_struct *) isa_bus_to_virt(dev->mem_start);
353         p->iscp = (struct iscp_struct *)
354                         ((char *)p->scp - sizeof(struct iscp_struct));
355
356         memset_io(p->iscp, 0, sizeof(struct iscp_struct));
357         memset_io(p->scp , 0, sizeof(struct scp_struct));
358
359         writel(make24(p->iscp), &p->scp->iscp);
360         writeb(SYSBUSVAL, &p->scp->sysbus);
361         writew(make16(p->scb), &p->iscp->scb_offset);
362
363         writeb(1, &p->iscp->busy);
364         ni_reset586();
365         ni_attn586();
366
367         mdelay(32);
368
369         if (readb(&p->iscp->busy))
370                 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
371
372         p->reset = 0;
373
374         memset_io((char *)p->scb, 0, sizeof(struct scb_struct));
375 }
376
377 /* set: io,irq,memstart,memend or set it when calling insmod */
378 static int irq = 9;
379 static int io = 0x300;
380 static long memstart;   /* e.g 0xd0000 */
381 static long memend;     /* e.g 0xd4000 */
382
383 /**********************************************
384  * probe the ni5210-card
385  */
386 struct net_device * __init ni52_probe(int unit)
387 {
388         struct net_device *dev = alloc_etherdev(sizeof(struct priv));
389         static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
390         int *port;
391         int err = 0;
392
393         if (!dev)
394                 return ERR_PTR(-ENOMEM);
395
396         if (unit >= 0) {
397                 sprintf(dev->name, "eth%d", unit);
398                 netdev_boot_setup_check(dev);
399                 io = dev->base_addr;
400                 irq = dev->irq;
401                 memstart = dev->mem_start;
402                 memend = dev->mem_end;
403         }
404
405         if (io > 0x1ff) {       /* Check a single specified location. */
406                 err = ni52_probe1(dev, io);
407         } else if (io > 0) {            /* Don't probe at all. */
408                 err = -ENXIO;
409         } else {
410                 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
411                         ;
412                 if (*port)
413                         goto got_it;
414 #ifdef FULL_IO_PROBE
415                 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
416                         ;
417                 if (io < 0x400)
418                         goto got_it;
419 #endif
420                 err = -ENODEV;
421         }
422         if (err)
423                 goto out;
424 got_it:
425         err = register_netdev(dev);
426         if (err)
427                 goto out1;
428         return dev;
429 out1:
430         release_region(dev->base_addr, NI52_TOTAL_SIZE);
431 out:
432         free_netdev(dev);
433         return ERR_PTR(err);
434 }
435
436 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
437 {
438         int i, size, retval;
439
440         dev->base_addr = ioaddr;
441         dev->irq = irq;
442         dev->mem_start = memstart;
443         dev->mem_end = memend;
444
445         if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
446                 return -EBUSY;
447
448         if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
449             !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
450                 retval = -ENODEV;
451                 goto out;
452         }
453
454         for (i = 0; i < ETH_ALEN; i++)
455                 dev->dev_addr[i] = inb(dev->base_addr+i);
456
457         if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
458                  || dev->dev_addr[2] != NI52_ADDR2) {
459                 retval = -ENODEV;
460                 goto out;
461         }
462
463         printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
464                                 dev->name, dev->base_addr);
465
466         /*
467          * check (or search) IO-Memory, 8K and 16K
468          */
469 #ifdef MODULE
470         size = dev->mem_end - dev->mem_start;
471         if (size != 0x2000 && size != 0x4000) {
472                 printk("\n");
473                 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
474                 retval = -ENODEV;
475                 goto out;
476         }
477         if (!check586(dev, (char *)dev->mem_start, size)) {
478                 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
479                 retval = -ENODEV;
480                 goto out;
481         }
482 #else
483         if (dev->mem_start != 0) {
484                 /* no auto-mem-probe */
485                 size = 0x4000; /* check for 16K mem */
486                 if (!check586(dev, (char *) dev->mem_start, size)) {
487                         size = 0x2000; /* check for 8K mem */
488                         if (!check586(dev, (char *)dev->mem_start, size)) {
489                                 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
490                                 retval = -ENODEV;
491                                 goto out;
492                         }
493                 }
494         } else {
495                 static const unsigned long memaddrs[] = {
496                         0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
497                         0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
498                 };
499                 for (i = 0;; i++) {
500                         if (!memaddrs[i]) {
501                                 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
502                                 retval = -ENODEV;
503                                 goto out;
504                         }
505                         dev->mem_start = memaddrs[i];
506                         size = 0x2000; /* check for 8K mem */
507                         if (check586(dev, (char *)dev->mem_start, size))
508                                 /* 8K-check */
509                                 break;
510                         size = 0x4000; /* check for 16K mem */
511                         if (check586(dev, (char *)dev->mem_start, size))
512                                 /* 16K-check */
513                                 break;
514                 }
515         }
516         /* set mem_end showed by 'ifconfig' */
517         dev->mem_end = dev->mem_start + size;
518 #endif
519
520         memset((char *)dev->priv, 0, sizeof(struct priv));
521
522         ((struct priv *)(dev->priv))->memtop =
523                                 isa_bus_to_virt(dev->mem_start) + size;
524         ((struct priv *)(dev->priv))->base =  (unsigned long)
525                         isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
526         alloc586(dev);
527
528         /* set number of receive-buffs according to memsize */
529         if (size == 0x2000)
530                 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_8;
531         else
532                 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_16;
533
534         printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
535                                 dev->mem_start, size);
536
537         if (dev->irq < 2) {
538                 unsigned long irq_mask;
539
540                 irq_mask = probe_irq_on();
541                 ni_reset586();
542                 ni_attn586();
543
544                 mdelay(20);
545                 dev->irq = probe_irq_off(irq_mask);
546                 if (!dev->irq) {
547                         printk("?autoirq, Failed to detect IRQ line!\n");
548                         retval = -EAGAIN;
549                         goto out;
550                 }
551                 printk("IRQ %d (autodetected).\n", dev->irq);
552         } else {
553                 if (dev->irq == 2)
554                         dev->irq = 9;
555                 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
556         }
557
558         dev->open               = ni52_open;
559         dev->stop               = ni52_close;
560         dev->get_stats          = ni52_get_stats;
561         dev->tx_timeout         = ni52_timeout;
562         dev->watchdog_timeo     = HZ/20;
563         dev->hard_start_xmit    = ni52_send_packet;
564         dev->set_multicast_list = set_multicast_list;
565
566         dev->if_port            = 0;
567
568         return 0;
569 out:
570         release_region(ioaddr, NI52_TOTAL_SIZE);
571         return retval;
572 }
573
574 /**********************************************
575  * init the chip (ni52-interrupt should be disabled?!)
576  * needs a correct 'allocated' memory
577  */
578
579 static int init586(struct net_device *dev)
580 {
581         void *ptr;
582         int i, result = 0;
583         struct priv *p = (struct priv *)dev->priv;
584         struct configure_cmd_struct *cfg_cmd;
585         struct iasetup_cmd_struct *ias_cmd;
586         struct tdr_cmd_struct *tdr_cmd;
587         struct mcsetup_cmd_struct *mc_cmd;
588         struct dev_mc_list *dmi = dev->mc_list;
589         int num_addrs = dev->mc_count;
590
591         ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
592
593         cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
594         writew(0, &cfg_cmd->cmd_status);
595         writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
596         writew(0xFFFF, &cfg_cmd->cmd_link);
597
598         /* number of cfg bytes */
599         writeb(0x0a, &cfg_cmd->byte_cnt);
600         /* fifo-limit (8=tx:32/rx:64) */
601         writeb(fifo, &cfg_cmd->fifo);
602         /* hold or discard bad recv frames (bit 7) */
603         writeb(0x40, &cfg_cmd->sav_bf);
604         /* addr_len |!src_insert |pre-len |loopback */
605         writeb(0x2e, &cfg_cmd->adr_len);
606         writeb(0x00, &cfg_cmd->priority);
607         writeb(0x60, &cfg_cmd->ifs);;
608         writeb(0x00, &cfg_cmd->time_low);
609         writeb(0xf2, &cfg_cmd->time_high);
610         writeb(0x00, &cfg_cmd->promisc);;
611         if (dev->flags & IFF_ALLMULTI) {
612                 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
613                 if (num_addrs > len) {
614                         printk(KERN_ERR "%s: switching to promisc. mode\n",
615                                 dev->name);
616                         dev->flags |= IFF_PROMISC;
617                 }
618         }
619         if (dev->flags & IFF_PROMISC)
620                 writeb(0x01, &cfg_cmd->promisc);
621         writeb(0x00, &cfg_cmd->carr_coll);
622         writew(make16(cfg_cmd), &p->scb->cbl_offset);
623         writew(0, &p->scb->cmd_ruc);
624
625         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
626         ni_attn586();
627
628         wait_for_stat_compl(cfg_cmd);
629
630         if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
631                                                         (STAT_COMPL|STAT_OK)) {
632                 printk(KERN_ERR "%s: configure command failed: %x\n",
633                                 dev->name, readw(&cfg_cmd->cmd_status));
634                 return 1;
635         }
636
637         /*
638          * individual address setup
639          */
640
641         ias_cmd = (struct iasetup_cmd_struct *)ptr;
642
643         writew(0, &ias_cmd->cmd_status);
644         writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
645         writew(0xffff, &ias_cmd->cmd_link);
646
647         memcpy_toio((char *)&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
648
649         writew(make16(ias_cmd), &p->scb->cbl_offset);
650
651         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
652         ni_attn586();
653
654         wait_for_stat_compl(ias_cmd);
655
656         if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
657                                                         (STAT_OK|STAT_COMPL)) {
658                 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
659                 return 1;
660         }
661
662         /*
663          * TDR, wire check .. e.g. no resistor e.t.c
664          */
665
666         tdr_cmd = (struct tdr_cmd_struct *)ptr;
667
668         writew(0, &tdr_cmd->cmd_status);
669         writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
670         writew(0xffff, &tdr_cmd->cmd_link);
671         writew(0, &tdr_cmd->status);
672
673         writew(make16(tdr_cmd), &p->scb->cbl_offset);
674         writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
675         ni_attn586();
676
677         wait_for_stat_compl(tdr_cmd);
678
679         if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
680                 printk(KERN_ERR "%s: Problems while running the TDR.\n",
681                                 dev->name);
682         else {
683                 udelay(16);
684                 result = readw(&tdr_cmd->status);
685                 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
686                 ni_attn586(); /* ack the interrupts */
687
688                 if (result & TDR_LNK_OK)
689                         ;
690                 else if (result & TDR_XCVR_PRB)
691                         printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
692                                 dev->name);
693                 else if (result & TDR_ET_OPN)
694                         printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
695                                 dev->name, result & TDR_TIMEMASK);
696                 else if (result & TDR_ET_SRT) {
697                         /* time == 0 -> strange :-) */
698                         if (result & TDR_TIMEMASK)
699                                 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
700                                         dev->name, result & TDR_TIMEMASK);
701                 } else
702                         printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
703                                                 dev->name, result);
704         }
705
706         /*
707          * Multicast setup
708          */
709         if (num_addrs && !(dev->flags & IFF_PROMISC)) {
710                 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
711                 writew(0, &mc_cmd->cmd_status);
712                 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
713                 writew(0xffff, &mc_cmd->cmd_link);
714                 writew(num_addrs * 6, &mc_cmd->mc_cnt);
715
716                 for (i = 0; i < num_addrs; i++, dmi = dmi->next)
717                         memcpy_toio((char *) mc_cmd->mc_list[i],
718                                                         dmi->dmi_addr, 6);
719
720                 writew(make16(mc_cmd), &p->scb->cbl_offset);
721                 writeb(CUC_START, &p->scb->cmd_cuc);
722                 ni_attn586();
723
724                 wait_for_stat_compl(mc_cmd);
725
726                 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
727                                                  != (STAT_COMPL|STAT_OK))
728                         printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
729         }
730
731         /*
732          * alloc nop/xmit-cmds
733          */
734 #if (NUM_XMIT_BUFFS == 1)
735         for (i = 0; i < 2; i++) {
736                 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
737                 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
738                 writew(0, &p->nop_cmds[i]->cmd_status);
739                 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
740                 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
741         }
742 #else
743         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
744                 p->nop_cmds[i] = (struct nop_cmd_struct *)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 = (char *) ptr + sizeof(struct nop_cmd_struct);
749         }
750 #endif
751
752         ptr = alloc_rfa(dev, (void *)ptr); /* init receive-frame-area */
753
754         /*
755          * alloc xmit-buffs / init xmit_cmds
756          */
757         for (i = 0; i < NUM_XMIT_BUFFS; i++) {
758                 /* Transmit cmd/buff 0 */
759                 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr;
760                 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
761                 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
762                 ptr = (char *) ptr + XMIT_BUFF_SIZE;
763                 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
764                 ptr = (char *) ptr + sizeof(struct tbd_struct);
765                 if ((void *)ptr > (void *)p->iscp) {
766                         printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
767                                 dev->name);
768                         return 1;
769                 }
770                 memset_io((char *)(p->xmit_cmds[i]), 0,
771                                         sizeof(struct transmit_cmd_struct));
772                 memset_io((char *)(p->xmit_buffs[i]), 0,
773                                         sizeof(struct tbd_struct));
774                 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
775                                         &p->xmit_cmds[i]->cmd_link);
776                 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
777                 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
778                 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
779                 writew(0xffff, &p->xmit_buffs[i]->next);
780                 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
781         }
782
783         p->xmit_count = 0;
784         p->xmit_last    = 0;
785 #ifndef NO_NOPCOMMANDS
786         p->nop_point    = 0;
787 #endif
788
789          /*
790                 * 'start transmitter'
791                 */
792 #ifndef NO_NOPCOMMANDS
793         writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
794         writeb(CUC_START, &p->scb->cmd_cuc);
795         ni_attn586();
796         wait_for_scb_cmd(dev);
797 #else
798         writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
799         writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
800 #endif
801
802         /*
803          * ack. interrupts
804          */
805         writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
806         ni_attn586();
807         udelay(16);
808
809         ni_enaint();
810
811         return 0;
812 }
813
814 /******************************************************
815  * This is a helper routine for ni52_rnr_int() and init586().
816  * It sets up the Receive Frame Area (RFA).
817  */
818
819 static void *alloc_rfa(struct net_device *dev, void *ptr)
820 {
821         struct rfd_struct *rfd = (struct rfd_struct *)ptr;
822         struct rbd_struct *rbd;
823         int i;
824         struct priv *p = (struct priv *) dev->priv;
825
826         memset_io((char *) rfd, 0,
827                 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
828         p->rfd_first = rfd;
829
830         for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
831                 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
832                         &rfd[i].next);
833                 writew(0xffff, &rfd[i].rbd_offset);
834         }
835         /* RU suspend */
836         writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
837
838         ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd));
839
840         rbd = (struct rbd_struct *) ptr;
841         ptr = (void *) (rbd + p->num_recv_buffs);
842
843          /* clr descriptors */
844         memset_io((char *)rbd, 0,
845                         sizeof(struct rbd_struct) * (p->num_recv_buffs));
846
847         for (i = 0; i < p->num_recv_buffs; i++) {
848                 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
849                 writew(RECV_BUFF_SIZE, &rbd[i].size);
850                 writel(make24(ptr), &rbd[i].buffer);
851                 ptr = (char *) ptr + RECV_BUFF_SIZE;
852         }
853         p->rfd_top      = p->rfd_first;
854         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
855
856         writew(make16(p->rfd_first), &p->scb->rfa_offset);
857         writew(make16(rbd), &p->rfd_first->rbd_offset);
858
859         return ptr;
860 }
861
862
863 /**************************************************
864  * Interrupt Handler ...
865  */
866
867 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
868 {
869         struct net_device *dev = dev_id;
870         unsigned int stat;
871         int cnt = 0;
872         struct priv *p;
873
874         p = (struct priv *) dev->priv;
875
876         if (debuglevel > 1)
877                 printk("I");
878
879         spin_lock(&p->spinlock);
880
881         wait_for_scb_cmd(dev); /* wait for last command */
882
883         while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
884                 writeb(stat, &p->scb->cmd_cuc);
885                 ni_attn586();
886
887                 if (stat & STAT_FR)      /* received a frame */
888                         ni52_rcv_int(dev);
889
890                 if (stat & STAT_RNR) { /* RU went 'not ready' */
891                         printk("(R)");
892                         if (readb(&p->scb->rus) & RU_SUSPEND) {
893                                 /* special case: RU_SUSPEND */
894                                 wait_for_scb_cmd(dev);
895                                 p->scb->cmd_ruc = RUC_RESUME;
896                                 ni_attn586();
897                                 wait_for_scb_cmd_ruc(dev);
898                         } else {
899                                 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
900                                         dev->name, stat, readb(&p->scb->rus));
901                                 ni52_rnr_int(dev);
902                         }
903                 }
904
905                 /* Command with I-bit set complete */
906                 if (stat & STAT_CX)
907                          ni52_xmt_int(dev);
908
909 #ifndef NO_NOPCOMMANDS
910                 if (stat & STAT_CNA) {  /* CU went 'not ready' */
911                         if (netif_running(dev))
912                                 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
913                                         dev->name, stat, readb(&p->scb->cus));
914                 }
915 #endif
916
917                 if (debuglevel > 1)
918                         printk("%d", cnt++);
919
920                 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
921                 wait_for_scb_cmd(dev);
922                 if (p->scb->cmd_cuc) {   /* timed out? */
923                         printk(KERN_ERR "%s: Acknowledge timed out.\n",
924                                 dev->name);
925                         ni_disint();
926                         break;
927                 }
928         }
929         spin_unlock(&p->spinlock);
930
931         if (debuglevel > 1)
932                 printk("i");
933         return IRQ_HANDLED;
934 }
935
936 /*******************************************************
937  * receive-interrupt
938  */
939
940 static void ni52_rcv_int(struct net_device *dev)
941 {
942         int status, cnt = 0;
943         unsigned short totlen;
944         struct sk_buff *skb;
945         struct rbd_struct *rbd;
946         struct priv *p = (struct priv *)dev->priv;
947
948         if (debuglevel > 0)
949                 printk("R");
950
951         for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
952                 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
953                 if (status & RFD_OK) { /* frame received without error? */
954                         totlen = readw(&rbd->status);
955                         if (totlen & RBD_LAST) {
956                                 /* the first and the last buffer? */
957                                 totlen &= RBD_MASK; /* length of this frame */
958                                 writew(0x00, &rbd->status);
959                                 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
960                                 if (skb != NULL) {
961                                         skb_reserve(skb, 2);
962                                         skb_put(skb, totlen);
963                                         skb_copy_to_linear_data(skb, (char *)p->base + (unsigned long) rbd->buffer, totlen);
964                                         skb->protocol = eth_type_trans(skb, dev);
965                                         netif_rx(skb);
966                                         dev->last_rx = jiffies;
967                                         p->stats.rx_packets++;
968                                         p->stats.rx_bytes += totlen;
969                                 } else
970                                         p->stats.rx_dropped++;
971                         } else {
972                                 int rstat;
973                                  /* free all RBD's until RBD_LAST is set */
974                                 totlen = 0;
975                                 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
976                                         totlen += rstat & RBD_MASK;
977                                         if (!rstat) {
978                                                 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
979                                                 break;
980                                         }
981                                         writew(0, &rbd->status);
982                                         rbd = (struct rbd_struct *) make32(readl(&rbd->next));
983                                 }
984                                 totlen += rstat & RBD_MASK;
985                                 writew(0, &rbd->status);
986                                 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
987                                         dev->name, totlen);
988                                 p->stats.rx_dropped++;
989                          }
990                 } else {/* frame !(ok), only with 'save-bad-frames' */
991                         printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
992                                 dev->name, status);
993                         p->stats.rx_errors++;
994                 }
995                 writeb(0, &p->rfd_top->stat_high);
996                 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
997                 writew(0xffff, &p->rfd_top->rbd_offset);
998                 writeb(0, &p->rfd_last->last);  /* delete RFD_SUSP      */
999                 p->rfd_last = p->rfd_top;
1000                 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
1001                 writew(make16(p->rfd_top), &p->scb->rfa_offset);
1002
1003                 if (debuglevel > 0)
1004                         printk("%d", cnt++);
1005         }
1006
1007         if (automatic_resume) {
1008                 wait_for_scb_cmd(dev);
1009                 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1010                 ni_attn586();
1011                 wait_for_scb_cmd_ruc(dev);
1012         }
1013
1014 #ifdef WAIT_4_BUSY
1015         {
1016                 int i;
1017                 for (i = 0; i < 1024; i++) {
1018                         if (p->rfd_top->status)
1019                                 break;
1020                         udelay(16);
1021                         if (i == 1023)
1022                                 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1023                 }
1024         }
1025 #endif
1026         if (debuglevel > 0)
1027                 printk("r");
1028 }
1029
1030 /**********************************************************
1031  * handle 'Receiver went not ready'.
1032  */
1033
1034 static void ni52_rnr_int(struct net_device *dev)
1035 {
1036         struct priv *p = (struct priv *) dev->priv;
1037
1038         p->stats.rx_errors++;
1039
1040         wait_for_scb_cmd(dev);          /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1041         writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1042         ni_attn586();
1043         wait_for_scb_cmd_ruc(dev);              /* wait for accept cmd. */
1044
1045         alloc_rfa(dev, (char *)p->rfd_first);
1046         /* maybe add a check here, before restarting the RU */
1047         startrecv586(dev); /* restart RU */
1048
1049         printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->rus);
1050
1051 }
1052
1053 /**********************************************************
1054  * handle xmit - interrupt
1055  */
1056
1057 static void ni52_xmt_int(struct net_device *dev)
1058 {
1059         int status;
1060         struct priv *p = (struct priv *) dev->priv;
1061
1062         if (debuglevel > 0)
1063                 printk("X");
1064
1065         status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1066         if (!(status & STAT_COMPL))
1067                 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1068
1069         if (status & STAT_OK) {
1070                 p->stats.tx_packets++;
1071                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1072         } else {
1073                 p->stats.tx_errors++;
1074                 if (status & TCMD_LATECOLL) {
1075                         printk(KERN_ERR "%s: late collision detected.\n",
1076                                 dev->name);
1077                         p->stats.collisions++;
1078                 } else if (status & TCMD_NOCARRIER) {
1079                         p->stats.tx_carrier_errors++;
1080                         printk(KERN_ERR "%s: no carrier detected.\n",
1081                                 dev->name);
1082                 } else if (status & TCMD_LOSTCTS)
1083                         printk(KERN_ERR "%s: loss of CTS detected.\n",
1084                                 dev->name);
1085                 else if (status & TCMD_UNDERRUN) {
1086                         p->stats.tx_fifo_errors++;
1087                         printk(KERN_ERR "%s: DMA underrun detected.\n",
1088                                 dev->name);
1089                 } else if (status & TCMD_MAXCOLL) {
1090                         printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1091                                 dev->name);
1092                         p->stats.collisions += 16;
1093                 }
1094         }
1095 #if (NUM_XMIT_BUFFS > 1)
1096         if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1097                 p->xmit_last = 0;
1098 #endif
1099         netif_wake_queue(dev);
1100 }
1101
1102 /***********************************************************
1103  * (re)start the receiver
1104  */
1105
1106 static void startrecv586(struct net_device *dev)
1107 {
1108         struct priv *p = (struct priv *) dev->priv;
1109
1110         wait_for_scb_cmd(dev);
1111         wait_for_scb_cmd_ruc(dev);
1112         writew(make16(p->rfd_first), &p->scb->rfa_offset);
1113         writeb(RUC_START, &p->scb->cmd_ruc);
1114         ni_attn586();           /* start cmd. */
1115         wait_for_scb_cmd_ruc(dev);
1116         /* wait for accept cmd. (no timeout!!) */
1117 }
1118
1119 static void ni52_timeout(struct net_device *dev)
1120 {
1121         struct priv *p = (struct priv *) dev->priv;
1122 #ifndef NO_NOPCOMMANDS
1123         if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1124                 netif_wake_queue(dev);
1125 #ifdef DEBUG
1126                 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1127                         dev->name);
1128                 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1129                         dev->name, (int)p->xmit_cmds[0]->cmd_status,
1130                         readw(&p->nop_cmds[0]->cmd_status),
1131                         readw(&p->nop_cmds[1]->cmd_status),
1132                         p->nop_point);
1133 #endif
1134                 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1135                 ni_attn586();
1136                 wait_for_scb_cmd(dev);
1137                 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1138                 writeb(CUC_START, &p->scb->cmd_cuc);
1139                 ni_attn586();
1140                 wait_for_scb_cmd(dev);
1141                 dev->trans_start = jiffies;
1142                 return 0;
1143         }
1144 #endif
1145         {
1146 #ifdef DEBUG
1147                 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1148                                 dev->name, readb(&p->scb->cus));
1149                 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1150                                 dev->name,
1151                                 readw(&p->xmit_cmds[0]->cmd_status),
1152                                 readw(&p->xmit_cmds[1]->cmd_status));
1153                 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1154                                 dev->name);
1155 #endif
1156                 ni52_close(dev);
1157                 ni52_open(dev);
1158         }
1159         dev->trans_start = jiffies;
1160 }
1161
1162 /******************************************************
1163  * send frame
1164  */
1165
1166 static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
1167 {
1168         int len, i;
1169 #ifndef NO_NOPCOMMANDS
1170         int next_nop;
1171 #endif
1172         struct priv *p = (struct priv *) dev->priv;
1173
1174         if (skb->len > XMIT_BUFF_SIZE) {
1175                 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);
1176                 return 0;
1177         }
1178
1179         netif_stop_queue(dev);
1180
1181         skb_copy_from_linear_data(skb, (char *)p->xmit_cbuffs[p->xmit_count],
1182                                                         skb->len);
1183         len = skb->len;
1184         if (len < ETH_ZLEN) {
1185                 len = ETH_ZLEN;
1186                 memset((char *)p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1187                                                         len - skb->len);
1188         }
1189
1190 #if (NUM_XMIT_BUFFS == 1)
1191 #       ifdef NO_NOPCOMMANDS
1192
1193 #ifdef DEBUG
1194         if (p->scb->cus & CU_ACTIVE) {
1195                 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1196                 printk(KERN_ERR "%s: stat: %04x %04x\n",
1197                                 dev->name, readb(&p->scb->cus),
1198                                 readw(&p->xmit_cmds[0]->cmd_status));
1199         }
1200 #endif
1201         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);;
1202         for (i = 0; i < 16; i++) {
1203                 writew(0, &p->xmit_cmds[0]->cmd_status);
1204                 wait_for_scb_cmd(dev);
1205                 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1206                         writeb(CUC_RESUME, &p->scb->cmd_cuc);
1207                 else {
1208                         writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1209                         writeb(CUC_START, &p->scb->cmd_cuc);
1210                 }
1211                 ni_attn586();
1212                 dev->trans_start = jiffies;
1213                 if (!i)
1214                         dev_kfree_skb(skb);
1215                 wait_for_scb_cmd(dev);
1216                 /* test it, because CU sometimes doesn't start immediately */
1217                 if (readb(&p->scb->cus) & CU_ACTIVE)
1218                         break;
1219                 if (readw(&p->xmit_cmds[0]->cmd_status))
1220                         break;
1221                 if (i == 15)
1222                         printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1223         }
1224 #       else
1225         next_nop = (p->nop_point + 1) & 0x1;
1226         writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1227         writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1228         writew(make16(p->nop_cmds[next_nop]),
1229                                 &p->nop_cmds[next_nop]->cmd_link);
1230         writew(0, &p->xmit_cmds[0]->cmd_status);
1231         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1232
1233         writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1234         dev->trans_start = jiffies;
1235         p->nop_point = next_nop;
1236         dev_kfree_skb(skb);
1237 #       endif
1238 #else
1239         writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1240         next_nop = p->xmit_count + 1
1241         if (next_nop == NUM_XMIT_BUFFS)
1242                 next_nop = 0;
1243         writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1244         /* linkpointer of xmit-command already points to next nop cmd */
1245         writew(make16(p->nop_cmds[next_nop]),
1246                                 &p->nop_cmds[next_nop]->cmd_link);
1247         writew(0, &p->nop_cmds[next_nop]->cmd_status);
1248         writew(make16(p->xmit_cmds[p->xmit_count]),
1249                                 &p->nop_cmds[p->xmit_count]->cmd_link);
1250         dev->trans_start = jiffies;
1251         p->xmit_count = next_nop;
1252         {
1253                 unsigned long flags;
1254                 spin_lock_irqsave(&p->spinlock);
1255                 if (p->xmit_count != p->xmit_last)
1256                         netif_wake_queue(dev);
1257                 spin_unlock_irqrestore(&p->spinlock);
1258         }
1259         dev_kfree_skb(skb);
1260 #endif
1261         return 0;
1262 }
1263
1264 /*******************************************
1265  * Someone wanna have the statistics
1266  */
1267
1268 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1269 {
1270         struct priv *p = (struct priv *) dev->priv;
1271         unsigned short crc, aln, rsc, ovrn;
1272
1273         /* Get error-statistics from the ni82586 */
1274         crc = readw(&p->scb->crc_errs);
1275         writew(0, &p->scb->crc_errs);
1276         aln = readw(&p->scb->aln_errs);
1277         writew(0, &p->scb->aln_errs);
1278         rsc = readw(&p->scb->rsc_errs);
1279         writew(0, &p->scb->rsc_errs);
1280         ovrn = readw(&p->scb->ovrn_errs);
1281         writew(0, &p->scb->ovrn_errs);
1282
1283         p->stats.rx_crc_errors += crc;
1284         p->stats.rx_fifo_errors += ovrn;
1285         p->stats.rx_frame_errors += aln;
1286         p->stats.rx_dropped += rsc;
1287
1288         return &p->stats;
1289 }
1290
1291 /********************************************************
1292  * Set MC list ..
1293  */
1294
1295 static void set_multicast_list(struct net_device *dev)
1296 {
1297         netif_stop_queue(dev);
1298         ni_disint();
1299         alloc586(dev);
1300         init586(dev);
1301         startrecv586(dev);
1302         ni_enaint();
1303         netif_wake_queue(dev);
1304 }
1305
1306 #ifdef MODULE
1307 static struct net_device *dev_ni52;
1308
1309 module_param(io, int, 0);
1310 module_param(irq, int, 0);
1311 module_param(memstart, long, 0);
1312 module_param(memend, long, 0);
1313 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1314 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1315 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1316 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1317
1318 int __init init_module(void)
1319 {
1320         if (io <= 0x0 || !memend || !memstart || irq < 2) {
1321                 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1322                 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1323                 return -ENODEV;
1324         }
1325         dev_ni52 = ni52_probe(-1);
1326         if (IS_ERR(dev_ni52))
1327                 return PTR_ERR(dev_ni52);
1328         return 0;
1329 }
1330
1331 void __exit cleanup_module(void)
1332 {
1333         unregister_netdev(dev_ni52);
1334         release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1335         free_netdev(dev_ni52);
1336 }
1337 #endif /* MODULE */
1338
1339 MODULE_LICENSE("GPL");
1340
1341 /*
1342  * END: linux/drivers/net/ni52.c
1343  */