1 /*
2 * net-3-driver for the NI5210 card (i82586 Ethernet chip)
3 *
4 * This is an extension to the Linux operating system, and is covered by the
5 * same GNU General Public License that covers that work.
6 *
7 * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
8 * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
9 * [feel free to mail ....]
10 *
11 * when using as module: (no autoprobing!)
12 * run with e.g:
13 * insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000
14 *
15 * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!.
16 *
17 * If you find a bug, please report me:
18 * The kernel panic output and any kmsg from the ni52 driver
19 * the ni5210-driver-version and the linux-kernel version
20 * how many shared memory (memsize) on the netcard,
21 * bootprom: yes/no, base_addr, mem_start
22 * maybe the ni5210-card revision and the i82586 version
23 *
24 * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340
25 * mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000,
26 * 0xd8000,0xcc000,0xce000,0xda000,0xdc000
27 *
28 * sources:
29 * skeleton.c from Donald Becker
30 *
31 * I have also done a look in the following sources: (mail me if you need them)
32 * crynwr-packet-driver by Russ Nelson
33 * Garret A. Wollman's (fourth) i82586-driver for BSD
34 * (before getting an i82596 (yes 596 not 586) manual, the existing drivers
35 * helped me a lot to understand this tricky chip.)
36 *
37 * Known Problems:
38 * The internal sysbus seems to be slow. So we often lose packets because of
39 * overruns while receiving from a fast remote host.
40 * This can slow down TCP connections. Maybe the newer ni5210 cards are
41 * better. My experience is, that if a machine sends with more than about
42 * 500-600K/s the fifo/sysbus overflows.
43 *
44 * IMPORTANT NOTE:
45 * On fast networks, it's a (very) good idea to have 16K shared memory. With
46 * 8K, we can store only 4 receive frames, so it can (easily) happen that a
47 * remote machine 'overruns' our system.
48 *
49 * Known i82586/card problems (I'm sure, there are many more!):
50 * Running the NOP-mode, the i82586 sometimes seems to forget to report
51 * every xmit-interrupt until we restart the CU.
52 * Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit
53 * in the RBD-Struct which indicates an end of the RBD queue.
54 * Instead, the RU fetches another (randomly selected and
55 * usually used) RBD and begins to fill it. (Maybe, this happens only if
56 * the last buffer from the previous RFD fits exact into the queue and
57 * the next RFD can't fetch an initial RBD. Anyone knows more? )
58 *
59 * results from ftp performance tests with Linux 1.2.5
60 * send and receive about 350-400 KByte/s (peak up to 460 kbytes/s)
61 * sending in NOP-mode: peak performance up to 530K/s (but better don't
62 * run this mode)
63 */
64
65 /*
66 * 29.Sept.96: virt_to_bus changes for new memory scheme
67 * 19.Feb.96: more Mcast changes, module support (MH)
68 *
69 * 18.Nov.95: Mcast changes (AC).
70 *
71 * 23.April.95: fixed(?) receiving problems by configuring a RFD more
72 * than the number of RBD's. Can maybe cause other problems.
73 * 18.April.95: Added MODULE support (MH)
74 * 17.April.95: MC related changes in init586() and set_multicast_list().
75 * removed use of 'jiffies' in init586() (MH)
76 *
77 * 19.Sep.94: Added Multicast support (not tested yet) (MH)
78 *
79 * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling.
80 * Now, every RFD has exact one RBD. (MH)
81 *
82 * 14.Sep.94: added promiscuous mode, a few cleanups (MH)
83 *
84 * 19.Aug.94: changed request_irq() parameter (MH)
85 *
86 * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)
87 *
88 * 19.July.94: lotsa cleanups .. (MH)
89 *
90 * 17.July.94: some patches ... verified to run with 1.1.29 (MH)
91 *
92 * 4.July.94: patches for Linux 1.1.24 (MH)
93 *
94 * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)
95 *
96 * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff,
97 * too (MH)
98 *
99 * < 30.Sep.93: first versions
100 */
101
102 static int debuglevel; /* debug-printk 0: off 1: a few 2: more */
103 static int automatic_resume; /* experimental .. better should be zero */
104 static int rfdadd; /* rfdadd=1 may be better for 8K MEM cards */
105 static int fifo = 0x8; /* don't change */
106
107 #include <linux/module.h>
108 #include <linux/kernel.h>
109 #include <linux/string.h>
110 #include <linux/errno.h>
111 #include <linux/ioport.h>
112 #include <linux/slab.h>
113 #include <linux/interrupt.h>
114 #include <linux/delay.h>
115 #include <linux/init.h>
116 #include <linux/bitops.h>
117 #include <asm/io.h>
118
119 #include <linux/netdevice.h>
120 #include <linux/etherdevice.h>
121 #include <linux/skbuff.h>
122
123 #include "ni52.h"
124
125 #define DRV_NAME "ni52"
126
127 #define DEBUG /* debug on */
128 #define SYSBUSVAL 1 /* 8 Bit */
129
130 #define ni_attn586() { outb(0, dev->base_addr + NI52_ATTENTION); }
131 #define ni_reset586() { outb(0, dev->base_addr + NI52_RESET); }
132 #define ni_disint() { outb(0, dev->base_addr + NI52_INTDIS); }
133 #define ni_enaint() { outb(0, dev->base_addr + NI52_INTENA); }
134
135 #define make32(ptr16) ((void __iomem *)(p->memtop + (short) (ptr16)))
136 #define make24(ptr32) ((char __iomem *)(ptr32)) - p->base
137 #define make16(ptr32) ((unsigned short) ((char __iomem *)(ptr32)\
138 - p->memtop))
139
140 /******************* how to calculate the buffers *****************************
141
142 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
143 * --------------- in a different (more stable?) mode. Only in this mode it's
144 * possible to configure the driver with 'NO_NOPCOMMANDS'
145
146 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
147 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
148 sizeof(rfd) = 24; sizeof(rbd) = 12;
149 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
150 sizeof(nop_cmd) = 8;
151
152 * if you don't know the driver, better do not change these values: */
153
154 #define RECV_BUFF_SIZE 1524 /* slightly oversized */
155 #define XMIT_BUFF_SIZE 1524 /* slightly oversized */
156 #define NUM_XMIT_BUFFS 1 /* config for both, 8K and 16K shmem */
157 #define NUM_RECV_BUFFS_8 4 /* config for 8K shared mem */
158 #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
159 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
160
161 /**************************************************************************/
162
163
164 #define NI52_TOTAL_SIZE 16
165 #define NI52_ADDR0 0x02
166 #define NI52_ADDR1 0x07
167 #define NI52_ADDR2 0x01
168
169 static int ni52_probe1(struct net_device *dev, int ioaddr);
170 static irqreturn_t ni52_interrupt(int irq, void *dev_id);
171 static int ni52_open(struct net_device *dev);
172 static int ni52_close(struct net_device *dev);
173 static int ni52_send_packet(struct sk_buff *, struct net_device *);
174 static struct net_device_stats *ni52_get_stats(struct net_device *dev);
175 static void set_multicast_list(struct net_device *dev);
176 static void ni52_timeout(struct net_device *dev);
177
178 /* helper-functions */
179 static int init586(struct net_device *dev);
180 static int check586(struct net_device *dev, unsigned size);
181 static void alloc586(struct net_device *dev);
182 static void startrecv586(struct net_device *dev);
183 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr);
184 static void ni52_rcv_int(struct net_device *dev);
185 static void ni52_xmt_int(struct net_device *dev);
186 static void ni52_rnr_int(struct net_device *dev);
187
188 struct priv {
189 struct net_device_stats stats;
190 char __iomem *base;
191 char __iomem *mapped;
192 char __iomem *memtop;
193 spinlock_t spinlock;
194 int reset;
195 struct rfd_struct __iomem *rfd_last, *rfd_top, *rfd_first;
196 struct scp_struct __iomem *scp;
197 struct iscp_struct __iomem *iscp;
198 struct scb_struct __iomem *scb;
199 struct tbd_struct __iomem *xmit_buffs[NUM_XMIT_BUFFS];
200 #if (NUM_XMIT_BUFFS == 1)
201 struct transmit_cmd_struct __iomem *xmit_cmds[2];
202 struct nop_cmd_struct __iomem *nop_cmds[2];
203 #else
204 struct transmit_cmd_struct __iomem *xmit_cmds[NUM_XMIT_BUFFS];
205 struct nop_cmd_struct __iomem *nop_cmds[NUM_XMIT_BUFFS];
206 #endif
207 int nop_point, num_recv_buffs;
208 char __iomem *xmit_cbuffs[NUM_XMIT_BUFFS];
209 int xmit_count, xmit_last;
210 };
211
212 /* wait for command with timeout: */
wait_for_scb_cmd(struct net_device * dev)213 static void wait_for_scb_cmd(struct net_device *dev)
214 {
215 struct priv *p = netdev_priv(dev);
216 int i;
217 for (i = 0; i < 16384; i++) {
218 if (readb(&p->scb->cmd_cuc) == 0)
219 break;
220 udelay(4);
221 if (i == 16383) {
222 printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",
223 dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus));
224 if (!p->reset) {
225 p->reset = 1;
226 ni_reset586();
227 }
228 }
229 }
230 }
231
wait_for_scb_cmd_ruc(struct net_device * dev)232 static void wait_for_scb_cmd_ruc(struct net_device *dev)
233 {
234 struct priv *p = netdev_priv(dev);
235 int i;
236 for (i = 0; i < 16384; i++) {
237 if (readb(&p->scb->cmd_ruc) == 0)
238 break;
239 udelay(4);
240 if (i == 16383) {
241 printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",
242 dev->name, readb(&p->scb->cmd_ruc),
243 readb(&p->scb->rus));
244 if (!p->reset) {
245 p->reset = 1;
246 ni_reset586();
247 }
248 }
249 }
250 }
251
wait_for_stat_compl(void __iomem * p)252 static void wait_for_stat_compl(void __iomem *p)
253 {
254 struct nop_cmd_struct __iomem *addr = p;
255 int i;
256 for (i = 0; i < 32767; i++) {
257 if (readw(&((addr)->cmd_status)) & STAT_COMPL)
258 break;
259 udelay(32);
260 }
261 }
262
263 /**********************************************
264 * close device
265 */
ni52_close(struct net_device * dev)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 */
ni52_open(struct net_device * dev)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
check_iscp(struct net_device * dev,void __iomem * addr)296 static int check_iscp(struct net_device *dev, void __iomem *addr)
297 {
298 struct iscp_struct __iomem *iscp = addr;
299 struct priv *p = netdev_priv(dev);
300 memset_io(iscp, 0, sizeof(struct iscp_struct));
301
302 writel(make24(iscp), &p->scp->iscp);
303 writeb(1, &iscp->busy);
304
305 ni_reset586();
306 ni_attn586();
307 mdelay(32); /* wait a while... */
308 /* i82586 clears 'busy' after successful init */
309 if (readb(&iscp->busy))
310 return 0;
311 return 1;
312 }
313
314 /**********************************************
315 * Check to see if there's an 82586 out there.
316 */
check586(struct net_device * dev,unsigned size)317 static int check586(struct net_device *dev, unsigned size)
318 {
319 struct priv *p = netdev_priv(dev);
320 int i;
321
322 p->mapped = ioremap(dev->mem_start, size);
323 if (!p->mapped)
324 return 0;
325
326 p->base = p->mapped + size - 0x01000000;
327 p->memtop = p->mapped + size;
328 p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
329 p->scb = (struct scb_struct __iomem *) p->mapped;
330 p->iscp = (struct iscp_struct __iomem *)p->scp - 1;
331 memset_io(p->scp, 0, sizeof(struct scp_struct));
332 for (i = 0; i < sizeof(struct scp_struct); i++)
333 /* memory was writeable? */
334 if (readb((char __iomem *)p->scp + i))
335 goto Enodev;
336 writeb(SYSBUSVAL, &p->scp->sysbus); /* 1 = 8Bit-Bus, 0 = 16 Bit */
337 if (readb(&p->scp->sysbus) != SYSBUSVAL)
338 goto Enodev;
339
340 if (!check_iscp(dev, p->mapped))
341 goto Enodev;
342 if (!check_iscp(dev, p->iscp))
343 goto Enodev;
344 return 1;
345 Enodev:
346 iounmap(p->mapped);
347 return 0;
348 }
349
350 /******************************************************************
351 * set iscp at the right place, called by ni52_probe1 and open586.
352 */
alloc586(struct net_device * dev)353 static void alloc586(struct net_device *dev)
354 {
355 struct priv *p = netdev_priv(dev);
356
357 ni_reset586();
358 mdelay(32);
359
360 memset_io(p->iscp, 0, sizeof(struct iscp_struct));
361 memset_io(p->scp , 0, sizeof(struct scp_struct));
362
363 writel(make24(p->iscp), &p->scp->iscp);
364 writeb(SYSBUSVAL, &p->scp->sysbus);
365 writew(make16(p->scb), &p->iscp->scb_offset);
366
367 writeb(1, &p->iscp->busy);
368 ni_reset586();
369 ni_attn586();
370
371 mdelay(32);
372
373 if (readb(&p->iscp->busy))
374 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
375
376 p->reset = 0;
377
378 memset_io(p->scb, 0, sizeof(struct scb_struct));
379 }
380
381 /* set: io,irq,memstart,memend or set it when calling insmod */
382 static int irq = 9;
383 static int io = 0x300;
384 static long memstart; /* e.g 0xd0000 */
385 static long memend; /* e.g 0xd4000 */
386
387 /**********************************************
388 * probe the ni5210-card
389 */
ni52_probe(int unit)390 struct net_device * __init ni52_probe(int unit)
391 {
392 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
393 static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
394 struct priv *p;
395 int *port;
396 int err = 0;
397
398 if (!dev)
399 return ERR_PTR(-ENOMEM);
400
401 p = netdev_priv(dev);
402
403 if (unit >= 0) {
404 sprintf(dev->name, "eth%d", unit);
405 netdev_boot_setup_check(dev);
406 io = dev->base_addr;
407 irq = dev->irq;
408 memstart = dev->mem_start;
409 memend = dev->mem_end;
410 }
411
412 if (io > 0x1ff) { /* Check a single specified location. */
413 err = ni52_probe1(dev, io);
414 } else if (io > 0) { /* Don't probe at all. */
415 err = -ENXIO;
416 } else {
417 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
418 ;
419 if (*port)
420 goto got_it;
421 #ifdef FULL_IO_PROBE
422 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
423 ;
424 if (io < 0x400)
425 goto got_it;
426 #endif
427 err = -ENODEV;
428 }
429 if (err)
430 goto out;
431 got_it:
432 err = register_netdev(dev);
433 if (err)
434 goto out1;
435 return dev;
436 out1:
437 iounmap(p->mapped);
438 release_region(dev->base_addr, NI52_TOTAL_SIZE);
439 out:
440 free_netdev(dev);
441 return ERR_PTR(err);
442 }
443
ni52_probe1(struct net_device * dev,int ioaddr)444 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
445 {
446 int i, size, retval;
447 struct priv *priv = netdev_priv(dev);
448
449 dev->base_addr = ioaddr;
450 dev->irq = irq;
451 dev->mem_start = memstart;
452 dev->mem_end = memend;
453
454 spin_lock_init(&priv->spinlock);
455
456 if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
457 return -EBUSY;
458
459 if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
460 !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
461 retval = -ENODEV;
462 goto out;
463 }
464
465 for (i = 0; i < ETH_ALEN; i++)
466 dev->dev_addr[i] = inb(dev->base_addr+i);
467
468 if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
469 || dev->dev_addr[2] != NI52_ADDR2) {
470 retval = -ENODEV;
471 goto out;
472 }
473
474 printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
475 dev->name, dev->base_addr);
476
477 /*
478 * check (or search) IO-Memory, 8K and 16K
479 */
480 #ifdef MODULE
481 size = dev->mem_end - dev->mem_start;
482 if (size != 0x2000 && size != 0x4000) {
483 printk("\n");
484 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
485 retval = -ENODEV;
486 goto out;
487 }
488 if (!check586(dev, size)) {
489 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
490 retval = -ENODEV;
491 goto out;
492 }
493 #else
494 if (dev->mem_start != 0) {
495 /* no auto-mem-probe */
496 size = 0x4000; /* check for 16K mem */
497 if (!check586(dev, size)) {
498 size = 0x2000; /* check for 8K mem */
499 if (!check586(dev, size)) {
500 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
501 retval = -ENODEV;
502 goto out;
503 }
504 }
505 } else {
506 static const unsigned long memaddrs[] = {
507 0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
508 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
509 };
510 for (i = 0;; i++) {
511 if (!memaddrs[i]) {
512 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
513 retval = -ENODEV;
514 goto out;
515 }
516 dev->mem_start = memaddrs[i];
517 size = 0x2000; /* check for 8K mem */
518 if (check586(dev, size))
519 /* 8K-check */
520 break;
521 size = 0x4000; /* check for 16K mem */
522 if (check586(dev, size))
523 /* 16K-check */
524 break;
525 }
526 }
527 /* set mem_end showed by 'ifconfig' */
528 dev->mem_end = dev->mem_start + size;
529 #endif
530
531 alloc586(dev);
532
533 /* set number of receive-buffs according to memsize */
534 if (size == 0x2000)
535 priv->num_recv_buffs = NUM_RECV_BUFFS_8;
536 else
537 priv->num_recv_buffs = NUM_RECV_BUFFS_16;
538
539 printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
540 dev->mem_start, size);
541
542 if (dev->irq < 2) {
543 unsigned long irq_mask;
544
545 irq_mask = probe_irq_on();
546 ni_reset586();
547 ni_attn586();
548
549 mdelay(20);
550 dev->irq = probe_irq_off(irq_mask);
551 if (!dev->irq) {
552 printk("?autoirq, Failed to detect IRQ line!\n");
553 retval = -EAGAIN;
554 iounmap(priv->mapped);
555 goto out;
556 }
557 printk("IRQ %d (autodetected).\n", dev->irq);
558 } else {
559 if (dev->irq == 2)
560 dev->irq = 9;
561 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
562 }
563
564 dev->open = ni52_open;
565 dev->stop = ni52_close;
566 dev->get_stats = ni52_get_stats;
567 dev->tx_timeout = ni52_timeout;
568 dev->watchdog_timeo = HZ/20;
569 dev->hard_start_xmit = ni52_send_packet;
570 dev->set_multicast_list = set_multicast_list;
571
572 dev->if_port = 0;
573
574 return 0;
575 out:
576 release_region(ioaddr, NI52_TOTAL_SIZE);
577 return retval;
578 }
579
580 /**********************************************
581 * init the chip (ni52-interrupt should be disabled?!)
582 * needs a correct 'allocated' memory
583 */
584
init586(struct net_device * dev)585 static int init586(struct net_device *dev)
586 {
587 void __iomem *ptr;
588 int i, result = 0;
589 struct priv *p = netdev_priv(dev);
590 struct configure_cmd_struct __iomem *cfg_cmd;
591 struct iasetup_cmd_struct __iomem *ias_cmd;
592 struct tdr_cmd_struct __iomem *tdr_cmd;
593 struct mcsetup_cmd_struct __iomem *mc_cmd;
594 struct dev_mc_list *dmi = dev->mc_list;
595 int num_addrs = dev->mc_count;
596
597 ptr = p->scb + 1;
598
599 cfg_cmd = ptr; /* configure-command */
600 writew(0, &cfg_cmd->cmd_status);
601 writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
602 writew(0xFFFF, &cfg_cmd->cmd_link);
603
604 /* number of cfg bytes */
605 writeb(0x0a, &cfg_cmd->byte_cnt);
606 /* fifo-limit (8=tx:32/rx:64) */
607 writeb(fifo, &cfg_cmd->fifo);
608 /* hold or discard bad recv frames (bit 7) */
609 writeb(0x40, &cfg_cmd->sav_bf);
610 /* addr_len |!src_insert |pre-len |loopback */
611 writeb(0x2e, &cfg_cmd->adr_len);
612 writeb(0x00, &cfg_cmd->priority);
613 writeb(0x60, &cfg_cmd->ifs);;
614 writeb(0x00, &cfg_cmd->time_low);
615 writeb(0xf2, &cfg_cmd->time_high);
616 writeb(0x00, &cfg_cmd->promisc);;
617 if (dev->flags & IFF_ALLMULTI) {
618 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
619 if (num_addrs > len) {
620 printk(KERN_ERR "%s: switching to promisc. mode\n",
621 dev->name);
622 writeb(0x01, &cfg_cmd->promisc);
623 }
624 }
625 if (dev->flags & IFF_PROMISC)
626 writeb(0x01, &cfg_cmd->promisc);
627 writeb(0x00, &cfg_cmd->carr_coll);
628 writew(make16(cfg_cmd), &p->scb->cbl_offset);
629 writeb(0, &p->scb->cmd_ruc);
630
631 writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
632 ni_attn586();
633
634 wait_for_stat_compl(cfg_cmd);
635
636 if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
637 (STAT_COMPL|STAT_OK)) {
638 printk(KERN_ERR "%s: configure command failed: %x\n",
639 dev->name, readw(&cfg_cmd->cmd_status));
640 return 1;
641 }
642
643 /*
644 * individual address setup
645 */
646
647 ias_cmd = ptr;
648
649 writew(0, &ias_cmd->cmd_status);
650 writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
651 writew(0xffff, &ias_cmd->cmd_link);
652
653 memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
654
655 writew(make16(ias_cmd), &p->scb->cbl_offset);
656
657 writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
658 ni_attn586();
659
660 wait_for_stat_compl(ias_cmd);
661
662 if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
663 (STAT_OK|STAT_COMPL)) {
664 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
665 return 1;
666 }
667
668 /*
669 * TDR, wire check .. e.g. no resistor e.t.c
670 */
671
672 tdr_cmd = ptr;
673
674 writew(0, &tdr_cmd->cmd_status);
675 writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
676 writew(0xffff, &tdr_cmd->cmd_link);
677 writew(0, &tdr_cmd->status);
678
679 writew(make16(tdr_cmd), &p->scb->cbl_offset);
680 writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
681 ni_attn586();
682
683 wait_for_stat_compl(tdr_cmd);
684
685 if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
686 printk(KERN_ERR "%s: Problems while running the TDR.\n",
687 dev->name);
688 else {
689 udelay(16);
690 result = readw(&tdr_cmd->status);
691 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
692 ni_attn586(); /* ack the interrupts */
693
694 if (result & TDR_LNK_OK)
695 ;
696 else if (result & TDR_XCVR_PRB)
697 printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
698 dev->name);
699 else if (result & TDR_ET_OPN)
700 printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
701 dev->name, result & TDR_TIMEMASK);
702 else if (result & TDR_ET_SRT) {
703 /* time == 0 -> strange :-) */
704 if (result & TDR_TIMEMASK)
705 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
706 dev->name, result & TDR_TIMEMASK);
707 } else
708 printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
709 dev->name, result);
710 }
711
712 /*
713 * Multicast setup
714 */
715 if (num_addrs && !(dev->flags & IFF_PROMISC)) {
716 mc_cmd = ptr;
717 writew(0, &mc_cmd->cmd_status);
718 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
719 writew(0xffff, &mc_cmd->cmd_link);
720 writew(num_addrs * 6, &mc_cmd->mc_cnt);
721
722 for (i = 0; i < num_addrs; i++, dmi = dmi->next)
723 memcpy_toio(mc_cmd->mc_list[i],
724 dmi->dmi_addr, 6);
725
726 writew(make16(mc_cmd), &p->scb->cbl_offset);
727 writeb(CUC_START, &p->scb->cmd_cuc);
728 ni_attn586();
729
730 wait_for_stat_compl(mc_cmd);
731
732 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
733 != (STAT_COMPL|STAT_OK))
734 printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
735 }
736
737 /*
738 * alloc nop/xmit-cmds
739 */
740 #if (NUM_XMIT_BUFFS == 1)
741 for (i = 0; i < 2; i++) {
742 p->nop_cmds[i] = ptr;
743 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
744 writew(0, &p->nop_cmds[i]->cmd_status);
745 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
746 ptr = ptr + sizeof(struct nop_cmd_struct);
747 }
748 #else
749 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
750 p->nop_cmds[i] = ptr;
751 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
752 writew(0, &p->nop_cmds[i]->cmd_status);
753 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
754 ptr = ptr + sizeof(struct nop_cmd_struct);
755 }
756 #endif
757
758 ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
759
760 /*
761 * alloc xmit-buffs / init xmit_cmds
762 */
763 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
764 /* Transmit cmd/buff 0 */
765 p->xmit_cmds[i] = ptr;
766 ptr = ptr + sizeof(struct transmit_cmd_struct);
767 p->xmit_cbuffs[i] = ptr; /* char-buffs */
768 ptr = ptr + XMIT_BUFF_SIZE;
769 p->xmit_buffs[i] = ptr; /* TBD */
770 ptr = ptr + sizeof(struct tbd_struct);
771 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
772 printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
773 dev->name);
774 return 1;
775 }
776 memset_io(p->xmit_cmds[i], 0,
777 sizeof(struct transmit_cmd_struct));
778 memset_io(p->xmit_buffs[i], 0,
779 sizeof(struct tbd_struct));
780 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
781 &p->xmit_cmds[i]->cmd_link);
782 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
783 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
784 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
785 writew(0xffff, &p->xmit_buffs[i]->next);
786 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
787 }
788
789 p->xmit_count = 0;
790 p->xmit_last = 0;
791 #ifndef NO_NOPCOMMANDS
792 p->nop_point = 0;
793 #endif
794
795 /*
796 * 'start transmitter'
797 */
798 #ifndef NO_NOPCOMMANDS
799 writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
800 writeb(CUC_START, &p->scb->cmd_cuc);
801 ni_attn586();
802 wait_for_scb_cmd(dev);
803 #else
804 writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
805 writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
806 #endif
807
808 /*
809 * ack. interrupts
810 */
811 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
812 ni_attn586();
813 udelay(16);
814
815 ni_enaint();
816
817 return 0;
818 }
819
820 /******************************************************
821 * This is a helper routine for ni52_rnr_int() and init586().
822 * It sets up the Receive Frame Area (RFA).
823 */
824
alloc_rfa(struct net_device * dev,void __iomem * ptr)825 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
826 {
827 struct rfd_struct __iomem *rfd = ptr;
828 struct rbd_struct __iomem *rbd;
829 int i;
830 struct priv *p = netdev_priv(dev);
831
832 memset_io(rfd, 0,
833 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
834 p->rfd_first = rfd;
835
836 for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
837 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
838 &rfd[i].next);
839 writew(0xffff, &rfd[i].rbd_offset);
840 }
841 /* RU suspend */
842 writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
843
844 ptr = rfd + (p->num_recv_buffs + rfdadd);
845
846 rbd = ptr;
847 ptr = rbd + p->num_recv_buffs;
848
849 /* clr descriptors */
850 memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
851
852 for (i = 0; i < p->num_recv_buffs; i++) {
853 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
854 writew(RECV_BUFF_SIZE, &rbd[i].size);
855 writel(make24(ptr), &rbd[i].buffer);
856 ptr = ptr + RECV_BUFF_SIZE;
857 }
858 p->rfd_top = p->rfd_first;
859 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
860
861 writew(make16(p->rfd_first), &p->scb->rfa_offset);
862 writew(make16(rbd), &p->rfd_first->rbd_offset);
863
864 return ptr;
865 }
866
867
868 /**************************************************
869 * Interrupt Handler ...
870 */
871
ni52_interrupt(int irq,void * dev_id)872 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
873 {
874 struct net_device *dev = dev_id;
875 unsigned int stat;
876 int cnt = 0;
877 struct priv *p;
878
879 p = netdev_priv(dev);
880
881 if (debuglevel > 1)
882 printk("I");
883
884 spin_lock(&p->spinlock);
885
886 wait_for_scb_cmd(dev); /* wait for last command */
887
888 while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
889 writeb(stat, &p->scb->cmd_cuc);
890 ni_attn586();
891
892 if (stat & STAT_FR) /* received a frame */
893 ni52_rcv_int(dev);
894
895 if (stat & STAT_RNR) { /* RU went 'not ready' */
896 printk("(R)");
897 if (readb(&p->scb->rus) & RU_SUSPEND) {
898 /* special case: RU_SUSPEND */
899 wait_for_scb_cmd(dev);
900 writeb(RUC_RESUME, &p->scb->cmd_ruc);
901 ni_attn586();
902 wait_for_scb_cmd_ruc(dev);
903 } else {
904 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
905 dev->name, stat, readb(&p->scb->rus));
906 ni52_rnr_int(dev);
907 }
908 }
909
910 /* Command with I-bit set complete */
911 if (stat & STAT_CX)
912 ni52_xmt_int(dev);
913
914 #ifndef NO_NOPCOMMANDS
915 if (stat & STAT_CNA) { /* CU went 'not ready' */
916 if (netif_running(dev))
917 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
918 dev->name, stat, readb(&p->scb->cus));
919 }
920 #endif
921
922 if (debuglevel > 1)
923 printk("%d", cnt++);
924
925 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
926 wait_for_scb_cmd(dev);
927 if (readb(&p->scb->cmd_cuc)) { /* timed out? */
928 printk(KERN_ERR "%s: Acknowledge timed out.\n",
929 dev->name);
930 ni_disint();
931 break;
932 }
933 }
934 spin_unlock(&p->spinlock);
935
936 if (debuglevel > 1)
937 printk("i");
938 return IRQ_HANDLED;
939 }
940
941 /*******************************************************
942 * receive-interrupt
943 */
944
ni52_rcv_int(struct net_device * dev)945 static void ni52_rcv_int(struct net_device *dev)
946 {
947 int status, cnt = 0;
948 unsigned short totlen;
949 struct sk_buff *skb;
950 struct rbd_struct __iomem *rbd;
951 struct priv *p = netdev_priv(dev);
952
953 if (debuglevel > 0)
954 printk("R");
955
956 for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
957 rbd = make32(readw(&p->rfd_top->rbd_offset));
958 if (status & RFD_OK) { /* frame received without error? */
959 totlen = readw(&rbd->status);
960 if (totlen & RBD_LAST) {
961 /* the first and the last buffer? */
962 totlen &= RBD_MASK; /* length of this frame */
963 writew(0x00, &rbd->status);
964 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
965 if (skb != NULL) {
966 skb_reserve(skb, 2);
967 skb_put(skb, totlen);
968 memcpy_fromio(skb->data, p->base + readl(&rbd->buffer), totlen);
969 skb->protocol = eth_type_trans(skb, dev);
970 netif_rx(skb);
971 p->stats.rx_packets++;
972 p->stats.rx_bytes += totlen;
973 } else
974 p->stats.rx_dropped++;
975 } else {
976 int rstat;
977 /* free all RBD's until RBD_LAST is set */
978 totlen = 0;
979 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
980 totlen += rstat & RBD_MASK;
981 if (!rstat) {
982 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
983 break;
984 }
985 writew(0, &rbd->status);
986 rbd = make32(readw(&rbd->next));
987 }
988 totlen += rstat & RBD_MASK;
989 writew(0, &rbd->status);
990 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
991 dev->name, totlen);
992 p->stats.rx_dropped++;
993 }
994 } else {/* frame !(ok), only with 'save-bad-frames' */
995 printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
996 dev->name, status);
997 p->stats.rx_errors++;
998 }
999 writeb(0, &p->rfd_top->stat_high);
1000 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
1001 writew(0xffff, &p->rfd_top->rbd_offset);
1002 writeb(0, &p->rfd_last->last); /* delete RFD_SUSP */
1003 p->rfd_last = p->rfd_top;
1004 p->rfd_top = make32(readw(&p->rfd_top->next)); /* step to next RFD */
1005 writew(make16(p->rfd_top), &p->scb->rfa_offset);
1006
1007 if (debuglevel > 0)
1008 printk("%d", cnt++);
1009 }
1010
1011 if (automatic_resume) {
1012 wait_for_scb_cmd(dev);
1013 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1014 ni_attn586();
1015 wait_for_scb_cmd_ruc(dev);
1016 }
1017
1018 #ifdef WAIT_4_BUSY
1019 {
1020 int i;
1021 for (i = 0; i < 1024; i++) {
1022 if (p->rfd_top->status)
1023 break;
1024 udelay(16);
1025 if (i == 1023)
1026 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1027 }
1028 }
1029 #endif
1030 if (debuglevel > 0)
1031 printk("r");
1032 }
1033
1034 /**********************************************************
1035 * handle 'Receiver went not ready'.
1036 */
1037
ni52_rnr_int(struct net_device * dev)1038 static void ni52_rnr_int(struct net_device *dev)
1039 {
1040 struct priv *p = netdev_priv(dev);
1041
1042 p->stats.rx_errors++;
1043
1044 wait_for_scb_cmd(dev); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1045 writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1046 ni_attn586();
1047 wait_for_scb_cmd_ruc(dev); /* wait for accept cmd. */
1048
1049 alloc_rfa(dev, p->rfd_first);
1050 /* maybe add a check here, before restarting the RU */
1051 startrecv586(dev); /* restart RU */
1052
1053 printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n",
1054 dev->name, readb(&p->scb->rus));
1055
1056 }
1057
1058 /**********************************************************
1059 * handle xmit - interrupt
1060 */
1061
ni52_xmt_int(struct net_device * dev)1062 static void ni52_xmt_int(struct net_device *dev)
1063 {
1064 int status;
1065 struct priv *p = netdev_priv(dev);
1066
1067 if (debuglevel > 0)
1068 printk("X");
1069
1070 status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1071 if (!(status & STAT_COMPL))
1072 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1073
1074 if (status & STAT_OK) {
1075 p->stats.tx_packets++;
1076 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1077 } else {
1078 p->stats.tx_errors++;
1079 if (status & TCMD_LATECOLL) {
1080 printk(KERN_ERR "%s: late collision detected.\n",
1081 dev->name);
1082 p->stats.collisions++;
1083 } else if (status & TCMD_NOCARRIER) {
1084 p->stats.tx_carrier_errors++;
1085 printk(KERN_ERR "%s: no carrier detected.\n",
1086 dev->name);
1087 } else if (status & TCMD_LOSTCTS)
1088 printk(KERN_ERR "%s: loss of CTS detected.\n",
1089 dev->name);
1090 else if (status & TCMD_UNDERRUN) {
1091 p->stats.tx_fifo_errors++;
1092 printk(KERN_ERR "%s: DMA underrun detected.\n",
1093 dev->name);
1094 } else if (status & TCMD_MAXCOLL) {
1095 printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1096 dev->name);
1097 p->stats.collisions += 16;
1098 }
1099 }
1100 #if (NUM_XMIT_BUFFS > 1)
1101 if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1102 p->xmit_last = 0;
1103 #endif
1104 netif_wake_queue(dev);
1105 }
1106
1107 /***********************************************************
1108 * (re)start the receiver
1109 */
1110
startrecv586(struct net_device * dev)1111 static void startrecv586(struct net_device *dev)
1112 {
1113 struct priv *p = netdev_priv(dev);
1114
1115 wait_for_scb_cmd(dev);
1116 wait_for_scb_cmd_ruc(dev);
1117 writew(make16(p->rfd_first), &p->scb->rfa_offset);
1118 writeb(RUC_START, &p->scb->cmd_ruc);
1119 ni_attn586(); /* start cmd. */
1120 wait_for_scb_cmd_ruc(dev);
1121 /* wait for accept cmd. (no timeout!!) */
1122 }
1123
ni52_timeout(struct net_device * dev)1124 static void ni52_timeout(struct net_device *dev)
1125 {
1126 struct priv *p = netdev_priv(dev);
1127 #ifndef NO_NOPCOMMANDS
1128 if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1129 netif_wake_queue(dev);
1130 #ifdef DEBUG
1131 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1132 dev->name);
1133 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1134 dev->name, (int)p->xmit_cmds[0]->cmd_status,
1135 readw(&p->nop_cmds[0]->cmd_status),
1136 readw(&p->nop_cmds[1]->cmd_status),
1137 p->nop_point);
1138 #endif
1139 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1140 ni_attn586();
1141 wait_for_scb_cmd(dev);
1142 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1143 writeb(CUC_START, &p->scb->cmd_cuc);
1144 ni_attn586();
1145 wait_for_scb_cmd(dev);
1146 dev->trans_start = jiffies;
1147 return 0;
1148 }
1149 #endif
1150 {
1151 #ifdef DEBUG
1152 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1153 dev->name, readb(&p->scb->cus));
1154 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1155 dev->name,
1156 readw(&p->xmit_cmds[0]->cmd_status),
1157 readw(&p->xmit_cmds[1]->cmd_status));
1158 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1159 dev->name);
1160 #endif
1161 ni52_close(dev);
1162 ni52_open(dev);
1163 }
1164 dev->trans_start = jiffies;
1165 }
1166
1167 /******************************************************
1168 * send frame
1169 */
1170
ni52_send_packet(struct sk_buff * skb,struct net_device * dev)1171 static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
1172 {
1173 int len, i;
1174 #ifndef NO_NOPCOMMANDS
1175 int next_nop;
1176 #endif
1177 struct priv *p = netdev_priv(dev);
1178
1179 if (skb->len > XMIT_BUFF_SIZE) {
1180 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);
1181 return 0;
1182 }
1183
1184 netif_stop_queue(dev);
1185
1186 memcpy_toio(p->xmit_cbuffs[p->xmit_count], skb->data, skb->len);
1187 len = skb->len;
1188 if (len < ETH_ZLEN) {
1189 len = ETH_ZLEN;
1190 memset_io(p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1191 len - skb->len);
1192 }
1193
1194 #if (NUM_XMIT_BUFFS == 1)
1195 # ifdef NO_NOPCOMMANDS
1196
1197 #ifdef DEBUG
1198 if (readb(&p->scb->cus) & CU_ACTIVE) {
1199 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1200 printk(KERN_ERR "%s: stat: %04x %04x\n",
1201 dev->name, readb(&p->scb->cus),
1202 readw(&p->xmit_cmds[0]->cmd_status));
1203 }
1204 #endif
1205 writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1206 for (i = 0; i < 16; i++) {
1207 writew(0, &p->xmit_cmds[0]->cmd_status);
1208 wait_for_scb_cmd(dev);
1209 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1210 writeb(CUC_RESUME, &p->scb->cmd_cuc);
1211 else {
1212 writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1213 writeb(CUC_START, &p->scb->cmd_cuc);
1214 }
1215 ni_attn586();
1216 dev->trans_start = jiffies;
1217 if (!i)
1218 dev_kfree_skb(skb);
1219 wait_for_scb_cmd(dev);
1220 /* test it, because CU sometimes doesn't start immediately */
1221 if (readb(&p->scb->cus) & CU_ACTIVE)
1222 break;
1223 if (readw(&p->xmit_cmds[0]->cmd_status))
1224 break;
1225 if (i == 15)
1226 printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1227 }
1228 # else
1229 next_nop = (p->nop_point + 1) & 0x1;
1230 writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1231 writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1232 writew(make16(p->nop_cmds[next_nop]),
1233 &p->nop_cmds[next_nop]->cmd_link);
1234 writew(0, &p->xmit_cmds[0]->cmd_status);
1235 writew(0, &p->nop_cmds[next_nop]->cmd_status);
1236
1237 writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1238 dev->trans_start = jiffies;
1239 p->nop_point = next_nop;
1240 dev_kfree_skb(skb);
1241 # endif
1242 #else
1243 writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1244 next_nop = p->xmit_count + 1
1245 if (next_nop == NUM_XMIT_BUFFS)
1246 next_nop = 0;
1247 writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1248 /* linkpointer of xmit-command already points to next nop cmd */
1249 writew(make16(p->nop_cmds[next_nop]),
1250 &p->nop_cmds[next_nop]->cmd_link);
1251 writew(0, &p->nop_cmds[next_nop]->cmd_status);
1252 writew(make16(p->xmit_cmds[p->xmit_count]),
1253 &p->nop_cmds[p->xmit_count]->cmd_link);
1254 dev->trans_start = jiffies;
1255 p->xmit_count = next_nop;
1256 {
1257 unsigned long flags;
1258 spin_lock_irqsave(&p->spinlock);
1259 if (p->xmit_count != p->xmit_last)
1260 netif_wake_queue(dev);
1261 spin_unlock_irqrestore(&p->spinlock);
1262 }
1263 dev_kfree_skb(skb);
1264 #endif
1265 return 0;
1266 }
1267
1268 /*******************************************
1269 * Someone wanna have the statistics
1270 */
1271
ni52_get_stats(struct net_device * dev)1272 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1273 {
1274 struct priv *p = netdev_priv(dev);
1275 unsigned short crc, aln, rsc, ovrn;
1276
1277 /* Get error-statistics from the ni82586 */
1278 crc = readw(&p->scb->crc_errs);
1279 writew(0, &p->scb->crc_errs);
1280 aln = readw(&p->scb->aln_errs);
1281 writew(0, &p->scb->aln_errs);
1282 rsc = readw(&p->scb->rsc_errs);
1283 writew(0, &p->scb->rsc_errs);
1284 ovrn = readw(&p->scb->ovrn_errs);
1285 writew(0, &p->scb->ovrn_errs);
1286
1287 p->stats.rx_crc_errors += crc;
1288 p->stats.rx_fifo_errors += ovrn;
1289 p->stats.rx_frame_errors += aln;
1290 p->stats.rx_dropped += rsc;
1291
1292 return &p->stats;
1293 }
1294
1295 /********************************************************
1296 * Set MC list ..
1297 */
1298
set_multicast_list(struct net_device * dev)1299 static void set_multicast_list(struct net_device *dev)
1300 {
1301 netif_stop_queue(dev);
1302 ni_disint();
1303 alloc586(dev);
1304 init586(dev);
1305 startrecv586(dev);
1306 ni_enaint();
1307 netif_wake_queue(dev);
1308 }
1309
1310 #ifdef MODULE
1311 static struct net_device *dev_ni52;
1312
1313 module_param(io, int, 0);
1314 module_param(irq, int, 0);
1315 module_param(memstart, long, 0);
1316 module_param(memend, long, 0);
1317 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1318 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1319 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1320 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1321
init_module(void)1322 int __init init_module(void)
1323 {
1324 if (io <= 0x0 || !memend || !memstart || irq < 2) {
1325 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1326 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1327 return -ENODEV;
1328 }
1329 dev_ni52 = ni52_probe(-1);
1330 if (IS_ERR(dev_ni52))
1331 return PTR_ERR(dev_ni52);
1332 return 0;
1333 }
1334
cleanup_module(void)1335 void __exit cleanup_module(void)
1336 {
1337 struct priv *p = netdev_priv(dev_ni52);
1338 unregister_netdev(dev_ni52);
1339 iounmap(p->mapped);
1340 release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1341 free_netdev(dev_ni52);
1342 }
1343 #endif /* MODULE */
1344
1345 MODULE_LICENSE("GPL");
1346