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[linux-2.6/mini2440.git] / drivers / net / ni52.c
bloba316dcc8a06d5e61576c1ce4b1ba9e8073cb0d76
1 /*
2 * net-3-driver for the NI5210 card (i82586 Ethernet chip)
3 *
4 * This is an extension to the Linux operating system, and is covered by the
5 * same GNU General Public License that covers that work.
6 *
7 * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
8 * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
9 * [feel free to mail ....]
10 *
11 * when using as module: (no autoprobing!)
12 * compile with:
13 * gcc -O2 -fomit-frame-pointer -m486 -D__KERNEL__ -DMODULE -c ni52.c
14 * run with e.g:
15 * insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000
16 *
17 * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!.
18 *
19 * If you find a bug, please report me:
20 * The kernel panic output and any kmsg from the ni52 driver
21 * the ni5210-driver-version and the linux-kernel version
22 * how many shared memory (memsize) on the netcard,
23 * bootprom: yes/no, base_addr, mem_start
24 * maybe the ni5210-card revision and the i82586 version
25 *
26 * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340
27 * mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000,
28 * 0xd8000,0xcc000,0xce000,0xda000,0xdc000
29 *
30 * sources:
31 * skeleton.c from Donald Becker
32 *
33 * I have also done a look in the following sources: (mail me if you need them)
34 * crynwr-packet-driver by Russ Nelson
35 * Garret A. Wollman's (fourth) i82586-driver for BSD
36 * (before getting an i82596 (yes 596 not 586) manual, the existing drivers
37 * helped me a lot to understand this tricky chip.)
38 *
39 * Known Problems:
40 * The internal sysbus seems to be slow. So we often lose packets because of
41 * overruns while receiving from a fast remote host.
42 * This can slow down TCP connections. Maybe the newer ni5210 cards are
43 * better. My experience is, that if a machine sends with more than about
44 * 500-600K/s the fifo/sysbus overflows.
45 *
46 * IMPORTANT NOTE:
47 * On fast networks, it's a (very) good idea to have 16K shared memory. With
48 * 8K, we can store only 4 receive frames, so it can (easily) happen that a
49 * remote machine 'overruns' our system.
50 *
51 * Known i82586/card problems (I'm sure, there are many more!):
52 * Running the NOP-mode, the i82586 sometimes seems to forget to report
53 * every xmit-interrupt until we restart the CU.
54 * Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit
55 * in the RBD-Struct which indicates an end of the RBD queue.
56 * Instead, the RU fetches another (randomly selected and
57 * usually used) RBD and begins to fill it. (Maybe, this happens only if
58 * the last buffer from the previous RFD fits exact into the queue and
59 * the next RFD can't fetch an initial RBD. Anyone knows more? )
60 *
61 * results from ftp performance tests with Linux 1.2.5
62 * send and receive about 350-400 KByte/s (peak up to 460 kbytes/s)
63 * sending in NOP-mode: peak performance up to 530K/s (but better don't
64 * run this mode)
65 */
66
67 /*
68 * 29.Sept.96: virt_to_bus changes for new memory scheme
69 * 19.Feb.96: more Mcast changes, module support (MH)
70 *
71 * 18.Nov.95: Mcast changes (AC).
72 *
73 * 23.April.95: fixed(?) receiving problems by configuring a RFD more
74 * than the number of RBD's. Can maybe cause other problems.
75 * 18.April.95: Added MODULE support (MH)
76 * 17.April.95: MC related changes in init586() and set_multicast_list().
77 * removed use of 'jiffies' in init586() (MH)
78 *
79 * 19.Sep.94: Added Multicast support (not tested yet) (MH)
80 *
81 * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling.
82 * Now, every RFD has exact one RBD. (MH)
83 *
84 * 14.Sep.94: added promiscuous mode, a few cleanups (MH)
85 *
86 * 19.Aug.94: changed request_irq() parameter (MH)
87 *
88 * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)
89 *
90 * 19.July.94: lotsa cleanups .. (MH)
91 *
92 * 17.July.94: some patches ... verified to run with 1.1.29 (MH)
93 *
94 * 4.July.94: patches for Linux 1.1.24 (MH)
95 *
96 * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)
97 *
98 * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff,
99 * too (MH)
100 *
101 * < 30.Sep.93: first versions
102 */
103
104 static int debuglevel; /* debug-printk 0: off 1: a few 2: more */
105 static int automatic_resume; /* experimental .. better should be zero */
106 static int rfdadd; /* rfdadd=1 may be better for 8K MEM cards */
107 static int fifo = 0x8; /* don't change */
108
109 #include <linux/module.h>
110 #include <linux/kernel.h>
111 #include <linux/string.h>
112 #include <linux/errno.h>
113 #include <linux/ioport.h>
114 #include <linux/slab.h>
115 #include <linux/interrupt.h>
116 #include <linux/delay.h>
117 #include <linux/init.h>
118 #include <linux/bitops.h>
119 #include <asm/io.h>
120
121 #include <linux/netdevice.h>
122 #include <linux/etherdevice.h>
123 #include <linux/skbuff.h>
124
125 #include "ni52.h"
126
127 #define DRV_NAME "ni52"
128
129 #define DEBUG /* debug on */
130 #define SYSBUSVAL 1 /* 8 Bit */
131
132 #define ni_attn586() { outb(0, dev->base_addr + NI52_ATTENTION); }
133 #define ni_reset586() { outb(0, dev->base_addr + NI52_RESET); }
134 #define ni_disint() { outb(0, dev->base_addr + NI52_INTDIS); }
135 #define ni_enaint() { outb(0, dev->base_addr + NI52_INTENA); }
136
137 #define make32(ptr16) ((void __iomem *)(p->memtop + (short) (ptr16)))
138 #define make24(ptr32) ((char __iomem *)(ptr32)) - p->base
139 #define make16(ptr32) ((unsigned short) ((char __iomem *)(ptr32)\
140 - p->memtop))
141
142 /******************* how to calculate the buffers *****************************
143
144 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
145 * --------------- in a different (more stable?) mode. Only in this mode it's
146 * possible to configure the driver with 'NO_NOPCOMMANDS'
147
148 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
149 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
150 sizeof(rfd) = 24; sizeof(rbd) = 12;
151 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
152 sizeof(nop_cmd) = 8;
153
154 * if you don't know the driver, better do not change these values: */
155
156 #define RECV_BUFF_SIZE 1524 /* slightly oversized */
157 #define XMIT_BUFF_SIZE 1524 /* slightly oversized */
158 #define NUM_XMIT_BUFFS 1 /* config for both, 8K and 16K shmem */
159 #define NUM_RECV_BUFFS_8 4 /* config for 8K shared mem */
160 #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
161 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
162
163 /**************************************************************************/
164
165
166 #define NI52_TOTAL_SIZE 16
167 #define NI52_ADDR0 0x02
168 #define NI52_ADDR1 0x07
169 #define NI52_ADDR2 0x01
170
171 static int ni52_probe1(struct net_device *dev, int ioaddr);
172 static irqreturn_t ni52_interrupt(int irq, void *dev_id);
173 static int ni52_open(struct net_device *dev);
174 static int ni52_close(struct net_device *dev);
175 static int ni52_send_packet(struct sk_buff *, struct net_device *);
176 static struct net_device_stats *ni52_get_stats(struct net_device *dev);
177 static void set_multicast_list(struct net_device *dev);
178 static void ni52_timeout(struct net_device *dev);
179
180 /* helper-functions */
181 static int init586(struct net_device *dev);
182 static int check586(struct net_device *dev, unsigned size);
183 static void alloc586(struct net_device *dev);
184 static void startrecv586(struct net_device *dev);
185 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr);
186 static void ni52_rcv_int(struct net_device *dev);
187 static void ni52_xmt_int(struct net_device *dev);
188 static void ni52_rnr_int(struct net_device *dev);
189
190 struct priv {
191 struct net_device_stats stats;
192 char __iomem *base;
193 char __iomem *mapped;
194 char __iomem *memtop;
195 spinlock_t spinlock;
196 int reset;
197 struct rfd_struct __iomem *rfd_last, *rfd_top, *rfd_first;
198 struct scp_struct __iomem *scp;
199 struct iscp_struct __iomem *iscp;
200 struct scb_struct __iomem *scb;
201 struct tbd_struct __iomem *xmit_buffs[NUM_XMIT_BUFFS];
202 #if (NUM_XMIT_BUFFS == 1)
203 struct transmit_cmd_struct __iomem *xmit_cmds[2];
204 struct nop_cmd_struct __iomem *nop_cmds[2];
205 #else
206 struct transmit_cmd_struct __iomem *xmit_cmds[NUM_XMIT_BUFFS];
207 struct nop_cmd_struct __iomem *nop_cmds[NUM_XMIT_BUFFS];
208 #endif
209 int nop_point, num_recv_buffs;
210 char __iomem *xmit_cbuffs[NUM_XMIT_BUFFS];
211 int xmit_count, xmit_last;
212 };
213
214 /* wait for command with timeout: */
215 static void wait_for_scb_cmd(struct net_device *dev)
216 {
217 struct priv *p = dev->priv;
218 int i;
219 for (i = 0; i < 16384; i++) {
220 if (readb(&p->scb->cmd_cuc) == 0)
221 break;
222 udelay(4);
223 if (i == 16383) {
224 printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",
225 dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus));
226 if (!p->reset) {
227 p->reset = 1;
228 ni_reset586();
229 }
230 }
231 }
232 }
233
234 static void wait_for_scb_cmd_ruc(struct net_device *dev)
235 {
236 struct priv *p = dev->priv;
237 int i;
238 for (i = 0; i < 16384; i++) {
239 if (readb(&p->scb->cmd_ruc) == 0)
240 break;
241 udelay(4);
242 if (i == 16383) {
243 printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",
244 dev->name, readb(&p->scb->cmd_ruc),
245 readb(&p->scb->rus));
246 if (!p->reset) {
247 p->reset = 1;
248 ni_reset586();
249 }
250 }
251 }
252 }
253
254 static void wait_for_stat_compl(void __iomem *p)
255 {
256 struct nop_cmd_struct __iomem *addr = p;
257 int i;
258 for (i = 0; i < 32767; i++) {
259 if (readw(&((addr)->cmd_status)) & STAT_COMPL)
260 break;
261 udelay(32);
262 }
263 }
264
265 /**********************************************
266 * close device
267 */
268 static int ni52_close(struct net_device *dev)
269 {
270 free_irq(dev->irq, dev);
271 ni_reset586(); /* the hard way to stop the receiver */
272 netif_stop_queue(dev);
273 return 0;
274 }
275
276 /**********************************************
277 * open device
278 */
279 static int ni52_open(struct net_device *dev)
280 {
281 int ret;
282
283 ni_disint();
284 alloc586(dev);
285 init586(dev);
286 startrecv586(dev);
287 ni_enaint();
288
289 ret = request_irq(dev->irq, &ni52_interrupt, 0, dev->name, dev);
290 if (ret) {
291 ni_reset586();
292 return ret;
293 }
294 netif_start_queue(dev);
295 return 0; /* most done by init */
296 }
297
298 static int check_iscp(struct net_device *dev, void __iomem *addr)
299 {
300 struct iscp_struct __iomem *iscp = addr;
301 struct priv *p = dev->priv;
302 memset_io(iscp, 0, sizeof(struct iscp_struct));
303
304 writel(make24(iscp), &p->scp->iscp);
305 writeb(1, &iscp->busy);
306
307 ni_reset586();
308 ni_attn586();
309 mdelay(32); /* wait a while... */
310 /* i82586 clears 'busy' after successful init */
311 if (readb(&iscp->busy))
312 return 0;
313 return 1;
314 }
315
316 /**********************************************
317 * Check to see if there's an 82586 out there.
318 */
319 static int check586(struct net_device *dev, unsigned size)
320 {
321 struct priv *p = dev->priv;
322 int i;
323
324 p->mapped = ioremap(dev->mem_start, size);
325 if (!p->mapped)
326 return 0;
327
328 p->base = p->mapped + size - 0x01000000;
329 p->memtop = p->mapped + size;
330 p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
331 p->scb = (struct scb_struct __iomem *) p->mapped;
332 p->iscp = (struct iscp_struct __iomem *)p->scp - 1;
333 memset_io(p->scp, 0, sizeof(struct scp_struct));
334 for (i = 0; i < sizeof(struct scp_struct); i++)
335 /* memory was writeable? */
336 if (readb((char __iomem *)p->scp + i))
337 goto Enodev;
338 writeb(SYSBUSVAL, &p->scp->sysbus); /* 1 = 8Bit-Bus, 0 = 16 Bit */
339 if (readb(&p->scp->sysbus) != SYSBUSVAL)
340 goto Enodev;
341
342 if (!check_iscp(dev, p->mapped))
343 goto Enodev;
344 if (!check_iscp(dev, p->iscp))
345 goto Enodev;
346 return 1;
347 Enodev:
348 iounmap(p->mapped);
349 return 0;
350 }
351
352 /******************************************************************
353 * set iscp at the right place, called by ni52_probe1 and open586.
354 */
355 static void alloc586(struct net_device *dev)
356 {
357 struct priv *p = (struct priv *) dev->priv;
358
359 ni_reset586();
360 mdelay(32);
361
362 memset_io(p->iscp, 0, sizeof(struct iscp_struct));
363 memset_io(p->scp , 0, sizeof(struct scp_struct));
364
365 writel(make24(p->iscp), &p->scp->iscp);
366 writeb(SYSBUSVAL, &p->scp->sysbus);
367 writew(make16(p->scb), &p->iscp->scb_offset);
368
369 writeb(1, &p->iscp->busy);
370 ni_reset586();
371 ni_attn586();
372
373 mdelay(32);
374
375 if (readb(&p->iscp->busy))
376 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
377
378 p->reset = 0;
379
380 memset_io(p->scb, 0, sizeof(struct scb_struct));
381 }
382
383 /* set: io,irq,memstart,memend or set it when calling insmod */
384 static int irq = 9;
385 static int io = 0x300;
386 static long memstart; /* e.g 0xd0000 */
387 static long memend; /* e.g 0xd4000 */
388
389 /**********************************************
390 * probe the ni5210-card
391 */
392 struct net_device * __init ni52_probe(int unit)
393 {
394 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
395 static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
396 struct priv *p;
397 int *port;
398 int err = 0;
399
400 if (!dev)
401 return ERR_PTR(-ENOMEM);
402
403 p = dev->priv;
404
405 if (unit >= 0) {
406 sprintf(dev->name, "eth%d", unit);
407 netdev_boot_setup_check(dev);
408 io = dev->base_addr;
409 irq = dev->irq;
410 memstart = dev->mem_start;
411 memend = dev->mem_end;
412 }
413
414 if (io > 0x1ff) { /* Check a single specified location. */
415 err = ni52_probe1(dev, io);
416 } else if (io > 0) { /* Don't probe at all. */
417 err = -ENXIO;
418 } else {
419 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
420 ;
421 if (*port)
422 goto got_it;
423 #ifdef FULL_IO_PROBE
424 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
425 ;
426 if (io < 0x400)
427 goto got_it;
428 #endif
429 err = -ENODEV;
430 }
431 if (err)
432 goto out;
433 got_it:
434 err = register_netdev(dev);
435 if (err)
436 goto out1;
437 return dev;
438 out1:
439 iounmap(p->mapped);
440 release_region(dev->base_addr, NI52_TOTAL_SIZE);
441 out:
442 free_netdev(dev);
443 return ERR_PTR(err);
444 }
445
446 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
447 {
448 int i, size, retval;
449 struct priv *priv = dev->priv;
450
451 dev->base_addr = ioaddr;
452 dev->irq = irq;
453 dev->mem_start = memstart;
454 dev->mem_end = memend;
455
456 spin_lock_init(&priv->spinlock);
457
458 if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
459 return -EBUSY;
460
461 if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
462 !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
463 retval = -ENODEV;
464 goto out;
465 }
466
467 for (i = 0; i < ETH_ALEN; i++)
468 dev->dev_addr[i] = inb(dev->base_addr+i);
469
470 if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
471 || dev->dev_addr[2] != NI52_ADDR2) {
472 retval = -ENODEV;
473 goto out;
474 }
475
476 printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
477 dev->name, dev->base_addr);
478
479 /*
480 * check (or search) IO-Memory, 8K and 16K
481 */
482 #ifdef MODULE
483 size = dev->mem_end - dev->mem_start;
484 if (size != 0x2000 && size != 0x4000) {
485 printk("\n");
486 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
487 retval = -ENODEV;
488 goto out;
489 }
490 if (!check586(dev, size)) {
491 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
492 retval = -ENODEV;
493 goto out;
494 }
495 #else
496 if (dev->mem_start != 0) {
497 /* no auto-mem-probe */
498 size = 0x4000; /* check for 16K mem */
499 if (!check586(dev, size)) {
500 size = 0x2000; /* check for 8K mem */
501 if (!check586(dev, size)) {
502 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
503 retval = -ENODEV;
504 goto out;
505 }
506 }
507 } else {
508 static const unsigned long memaddrs[] = {
509 0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
510 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
511 };
512 for (i = 0;; i++) {
513 if (!memaddrs[i]) {
514 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
515 retval = -ENODEV;
516 goto out;
517 }
518 dev->mem_start = memaddrs[i];
519 size = 0x2000; /* check for 8K mem */
520 if (check586(dev, size))
521 /* 8K-check */
522 break;
523 size = 0x4000; /* check for 16K mem */
524 if (check586(dev, size))
525 /* 16K-check */
526 break;
527 }
528 }
529 /* set mem_end showed by 'ifconfig' */
530 dev->mem_end = dev->mem_start + size;
531 #endif
532
533 alloc586(dev);
534
535 /* set number of receive-buffs according to memsize */
536 if (size == 0x2000)
537 priv->num_recv_buffs = NUM_RECV_BUFFS_8;
538 else
539 priv->num_recv_buffs = NUM_RECV_BUFFS_16;
540
541 printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
542 dev->mem_start, size);
543
544 if (dev->irq < 2) {
545 unsigned long irq_mask;
546
547 irq_mask = probe_irq_on();
548 ni_reset586();
549 ni_attn586();
550
551 mdelay(20);
552 dev->irq = probe_irq_off(irq_mask);
553 if (!dev->irq) {
554 printk("?autoirq, Failed to detect IRQ line!\n");
555 retval = -EAGAIN;
556 iounmap(priv->mapped);
557 goto out;
558 }
559 printk("IRQ %d (autodetected).\n", dev->irq);
560 } else {
561 if (dev->irq == 2)
562 dev->irq = 9;
563 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
564 }
565
566 dev->open = ni52_open;
567 dev->stop = ni52_close;
568 dev->get_stats = ni52_get_stats;
569 dev->tx_timeout = ni52_timeout;
570 dev->watchdog_timeo = HZ/20;
571 dev->hard_start_xmit = ni52_send_packet;
572 dev->set_multicast_list = set_multicast_list;
573
574 dev->if_port = 0;
575
576 return 0;
577 out:
578 release_region(ioaddr, NI52_TOTAL_SIZE);
579 return retval;
580 }
581
582 /**********************************************
583 * init the chip (ni52-interrupt should be disabled?!)
584 * needs a correct 'allocated' memory
585 */
586
587 static int init586(struct net_device *dev)
588 {
589 void __iomem *ptr;
590 int i, result = 0;
591 struct priv *p = (struct priv *)dev->priv;
592 struct configure_cmd_struct __iomem *cfg_cmd;
593 struct iasetup_cmd_struct __iomem *ias_cmd;
594 struct tdr_cmd_struct __iomem *tdr_cmd;
595 struct mcsetup_cmd_struct __iomem *mc_cmd;
596 struct dev_mc_list *dmi = dev->mc_list;
597 int num_addrs = dev->mc_count;
598
599 ptr = p->scb + 1;
600
601 cfg_cmd = ptr; /* configure-command */
602 writew(0, &cfg_cmd->cmd_status);
603 writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
604 writew(0xFFFF, &cfg_cmd->cmd_link);
605
606 /* number of cfg bytes */
607 writeb(0x0a, &cfg_cmd->byte_cnt);
608 /* fifo-limit (8=tx:32/rx:64) */
609 writeb(fifo, &cfg_cmd->fifo);
610 /* hold or discard bad recv frames (bit 7) */
611 writeb(0x40, &cfg_cmd->sav_bf);
612 /* addr_len |!src_insert |pre-len |loopback */
613 writeb(0x2e, &cfg_cmd->adr_len);
614 writeb(0x00, &cfg_cmd->priority);
615 writeb(0x60, &cfg_cmd->ifs);;
616 writeb(0x00, &cfg_cmd->time_low);
617 writeb(0xf2, &cfg_cmd->time_high);
618 writeb(0x00, &cfg_cmd->promisc);;
619 if (dev->flags & IFF_ALLMULTI) {
620 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
621 if (num_addrs > len) {
622 printk(KERN_ERR "%s: switching to promisc. mode\n",
623 dev->name);
624 dev->flags |= IFF_PROMISC;
625 }
626 }
627 if (dev->flags & IFF_PROMISC)
628 writeb(0x01, &cfg_cmd->promisc);
629 writeb(0x00, &cfg_cmd->carr_coll);
630 writew(make16(cfg_cmd), &p->scb->cbl_offset);
631 writeb(0, &p->scb->cmd_ruc);
632
633 writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
634 ni_attn586();
635
636 wait_for_stat_compl(cfg_cmd);
637
638 if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
639 (STAT_COMPL|STAT_OK)) {
640 printk(KERN_ERR "%s: configure command failed: %x\n",
641 dev->name, readw(&cfg_cmd->cmd_status));
642 return 1;
643 }
644
645 /*
646 * individual address setup
647 */
648
649 ias_cmd = ptr;
650
651 writew(0, &ias_cmd->cmd_status);
652 writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
653 writew(0xffff, &ias_cmd->cmd_link);
654
655 memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
656
657 writew(make16(ias_cmd), &p->scb->cbl_offset);
658
659 writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
660 ni_attn586();
661
662 wait_for_stat_compl(ias_cmd);
663
664 if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
665 (STAT_OK|STAT_COMPL)) {
666 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
667 return 1;
668 }
669
670 /*
671 * TDR, wire check .. e.g. no resistor e.t.c
672 */
673
674 tdr_cmd = ptr;
675
676 writew(0, &tdr_cmd->cmd_status);
677 writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
678 writew(0xffff, &tdr_cmd->cmd_link);
679 writew(0, &tdr_cmd->status);
680
681 writew(make16(tdr_cmd), &p->scb->cbl_offset);
682 writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
683 ni_attn586();
684
685 wait_for_stat_compl(tdr_cmd);
686
687 if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
688 printk(KERN_ERR "%s: Problems while running the TDR.\n",
689 dev->name);
690 else {
691 udelay(16);
692 result = readw(&tdr_cmd->status);
693 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
694 ni_attn586(); /* ack the interrupts */
695
696 if (result & TDR_LNK_OK)
697 ;
698 else if (result & TDR_XCVR_PRB)
699 printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
700 dev->name);
701 else if (result & TDR_ET_OPN)
702 printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
703 dev->name, result & TDR_TIMEMASK);
704 else if (result & TDR_ET_SRT) {
705 /* time == 0 -> strange :-) */
706 if (result & TDR_TIMEMASK)
707 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
708 dev->name, result & TDR_TIMEMASK);
709 } else
710 printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
711 dev->name, result);
712 }
713
714 /*
715 * Multicast setup
716 */
717 if (num_addrs && !(dev->flags & IFF_PROMISC)) {
718 mc_cmd = ptr;
719 writew(0, &mc_cmd->cmd_status);
720 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
721 writew(0xffff, &mc_cmd->cmd_link);
722 writew(num_addrs * 6, &mc_cmd->mc_cnt);
723
724 for (i = 0; i < num_addrs; i++, dmi = dmi->next)
725 memcpy_toio(mc_cmd->mc_list[i],
726 dmi->dmi_addr, 6);
727
728 writew(make16(mc_cmd), &p->scb->cbl_offset);
729 writeb(CUC_START, &p->scb->cmd_cuc);
730 ni_attn586();
731
732 wait_for_stat_compl(mc_cmd);
733
734 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
735 != (STAT_COMPL|STAT_OK))
736 printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
737 }
738
739 /*
740 * alloc nop/xmit-cmds
741 */
742 #if (NUM_XMIT_BUFFS == 1)
743 for (i = 0; i < 2; i++) {
744 p->nop_cmds[i] = ptr;
745 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
746 writew(0, &p->nop_cmds[i]->cmd_status);
747 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
748 ptr = ptr + sizeof(struct nop_cmd_struct);
749 }
750 #else
751 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
752 p->nop_cmds[i] = ptr;
753 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
754 writew(0, &p->nop_cmds[i]->cmd_status);
755 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
756 ptr = ptr + sizeof(struct nop_cmd_struct);
757 }
758 #endif
759
760 ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
761
762 /*
763 * alloc xmit-buffs / init xmit_cmds
764 */
765 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
766 /* Transmit cmd/buff 0 */
767 p->xmit_cmds[i] = ptr;
768 ptr = ptr + sizeof(struct transmit_cmd_struct);
769 p->xmit_cbuffs[i] = ptr; /* char-buffs */
770 ptr = ptr + XMIT_BUFF_SIZE;
771 p->xmit_buffs[i] = ptr; /* TBD */
772 ptr = ptr + sizeof(struct tbd_struct);
773 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
774 printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
775 dev->name);
776 return 1;
777 }
778 memset_io(p->xmit_cmds[i], 0,
779 sizeof(struct transmit_cmd_struct));
780 memset_io(p->xmit_buffs[i], 0,
781 sizeof(struct tbd_struct));
782 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
783 &p->xmit_cmds[i]->cmd_link);
784 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
785 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
786 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
787 writew(0xffff, &p->xmit_buffs[i]->next);
788 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
789 }
790
791 p->xmit_count = 0;
792 p->xmit_last = 0;
793 #ifndef NO_NOPCOMMANDS
794 p->nop_point = 0;
795 #endif
796
797 /*
798 * 'start transmitter'
799 */
800 #ifndef NO_NOPCOMMANDS
801 writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
802 writeb(CUC_START, &p->scb->cmd_cuc);
803 ni_attn586();
804 wait_for_scb_cmd(dev);
805 #else
806 writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
807 writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
808 #endif
809
810 /*
811 * ack. interrupts
812 */
813 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
814 ni_attn586();
815 udelay(16);
816
817 ni_enaint();
818
819 return 0;
820 }
821
822 /******************************************************
823 * This is a helper routine for ni52_rnr_int() and init586().
824 * It sets up the Receive Frame Area (RFA).
825 */
826
827 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
828 {
829 struct rfd_struct __iomem *rfd = ptr;
830 struct rbd_struct __iomem *rbd;
831 int i;
832 struct priv *p = (struct priv *) dev->priv;
833
834 memset_io(rfd, 0,
835 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
836 p->rfd_first = rfd;
837
838 for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
839 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
840 &rfd[i].next);
841 writew(0xffff, &rfd[i].rbd_offset);
842 }
843 /* RU suspend */
844 writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
845
846 ptr = rfd + (p->num_recv_buffs + rfdadd);
847
848 rbd = ptr;
849 ptr = rbd + p->num_recv_buffs;
850
851 /* clr descriptors */
852 memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
853
854 for (i = 0; i < p->num_recv_buffs; i++) {
855 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
856 writew(RECV_BUFF_SIZE, &rbd[i].size);
857 writel(make24(ptr), &rbd[i].buffer);
858 ptr = ptr + RECV_BUFF_SIZE;
859 }
860 p->rfd_top = p->rfd_first;
861 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
862
863 writew(make16(p->rfd_first), &p->scb->rfa_offset);
864 writew(make16(rbd), &p->rfd_first->rbd_offset);
865
866 return ptr;
867 }
868
869
870 /**************************************************
871 * Interrupt Handler ...
872 */
873
874 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
875 {
876 struct net_device *dev = dev_id;
877 unsigned int stat;
878 int cnt = 0;
879 struct priv *p;
880
881 p = (struct priv *) dev->priv;
882
883 if (debuglevel > 1)
884 printk("I");
885
886 spin_lock(&p->spinlock);
887
888 wait_for_scb_cmd(dev); /* wait for last command */
889
890 while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
891 writeb(stat, &p->scb->cmd_cuc);
892 ni_attn586();
893
894 if (stat & STAT_FR) /* received a frame */
895 ni52_rcv_int(dev);
896
897 if (stat & STAT_RNR) { /* RU went 'not ready' */
898 printk("(R)");
899 if (readb(&p->scb->rus) & RU_SUSPEND) {
900 /* special case: RU_SUSPEND */
901 wait_for_scb_cmd(dev);
902 writeb(RUC_RESUME, &p->scb->cmd_ruc);
903 ni_attn586();
904 wait_for_scb_cmd_ruc(dev);
905 } else {
906 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
907 dev->name, stat, readb(&p->scb->rus));
908 ni52_rnr_int(dev);
909 }
910 }
911
912 /* Command with I-bit set complete */
913 if (stat & STAT_CX)
914 ni52_xmt_int(dev);
915
916 #ifndef NO_NOPCOMMANDS
917 if (stat & STAT_CNA) { /* CU went 'not ready' */
918 if (netif_running(dev))
919 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
920 dev->name, stat, readb(&p->scb->cus));
921 }
922 #endif
923
924 if (debuglevel > 1)
925 printk("%d", cnt++);
926
927 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
928 wait_for_scb_cmd(dev);
929 if (readb(&p->scb->cmd_cuc)) { /* timed out? */
930 printk(KERN_ERR "%s: Acknowledge timed out.\n",
931 dev->name);
932 ni_disint();
933 break;
934 }
935 }
936 spin_unlock(&p->spinlock);
937
938 if (debuglevel > 1)
939 printk("i");
940 return IRQ_HANDLED;
941 }
942
943 /*******************************************************
944 * receive-interrupt
945 */
946
947 static void ni52_rcv_int(struct net_device *dev)
948 {
949 int status, cnt = 0;
950 unsigned short totlen;
951 struct sk_buff *skb;
952 struct rbd_struct __iomem *rbd;
953 struct priv *p = (struct priv *)dev->priv;
954
955 if (debuglevel > 0)
956 printk("R");
957
958 for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
959 rbd = make32(readw(&p->rfd_top->rbd_offset));
960 if (status & RFD_OK) { /* frame received without error? */
961 totlen = readw(&rbd->status);
962 if (totlen & RBD_LAST) {
963 /* the first and the last buffer? */
964 totlen &= RBD_MASK; /* length of this frame */
965 writew(0x00, &rbd->status);
966 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
967 if (skb != NULL) {
968 skb_reserve(skb, 2);
969 skb_put(skb, totlen);
970 memcpy_fromio(skb->data, p->base + readl(&rbd->buffer), totlen);
971 skb->protocol = eth_type_trans(skb, dev);
972 netif_rx(skb);
973 dev->last_rx = jiffies;
974 p->stats.rx_packets++;
975 p->stats.rx_bytes += totlen;
976 } else
977 p->stats.rx_dropped++;
978 } else {
979 int rstat;
980 /* free all RBD's until RBD_LAST is set */
981 totlen = 0;
982 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
983 totlen += rstat & RBD_MASK;
984 if (!rstat) {
985 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
986 break;
987 }
988 writew(0, &rbd->status);
989 rbd = make32(readw(&rbd->next));
990 }
991 totlen += rstat & RBD_MASK;
992 writew(0, &rbd->status);
993 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
994 dev->name, totlen);
995 p->stats.rx_dropped++;
996 }
997 } else {/* frame !(ok), only with 'save-bad-frames' */
998 printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
999 dev->name, status);
1000 p->stats.rx_errors++;
1001 }
1002 writeb(0, &p->rfd_top->stat_high);
1003 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
1004 writew(0xffff, &p->rfd_top->rbd_offset);
1005 writeb(0, &p->rfd_last->last); /* delete RFD_SUSP */
1006 p->rfd_last = p->rfd_top;
1007 p->rfd_top = make32(readw(&p->rfd_top->next)); /* step to next RFD */
1008 writew(make16(p->rfd_top), &p->scb->rfa_offset);
1009
1010 if (debuglevel > 0)
1011 printk("%d", cnt++);
1012 }
1013
1014 if (automatic_resume) {
1015 wait_for_scb_cmd(dev);
1016 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1017 ni_attn586();
1018 wait_for_scb_cmd_ruc(dev);
1019 }
1020
1021 #ifdef WAIT_4_BUSY
1022 {
1023 int i;
1024 for (i = 0; i < 1024; i++) {
1025 if (p->rfd_top->status)
1026 break;
1027 udelay(16);
1028 if (i == 1023)
1029 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1030 }
1031 }
1032 #endif
1033 if (debuglevel > 0)
1034 printk("r");
1035 }
1036
1037 /**********************************************************
1038 * handle 'Receiver went not ready'.
1039 */
1040
1041 static void ni52_rnr_int(struct net_device *dev)
1042 {
1043 struct priv *p = (struct priv *) dev->priv;
1044
1045 p->stats.rx_errors++;
1046
1047 wait_for_scb_cmd(dev); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1048 writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1049 ni_attn586();
1050 wait_for_scb_cmd_ruc(dev); /* wait for accept cmd. */
1051
1052 alloc_rfa(dev, p->rfd_first);
1053 /* maybe add a check here, before restarting the RU */
1054 startrecv586(dev); /* restart RU */
1055
1056 printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n",
1057 dev->name, readb(&p->scb->rus));
1058
1059 }
1060
1061 /**********************************************************
1062 * handle xmit - interrupt
1063 */
1064
1065 static void ni52_xmt_int(struct net_device *dev)
1066 {
1067 int status;
1068 struct priv *p = (struct priv *) dev->priv;
1069
1070 if (debuglevel > 0)
1071 printk("X");
1072
1073 status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1074 if (!(status & STAT_COMPL))
1075 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1076
1077 if (status & STAT_OK) {
1078 p->stats.tx_packets++;
1079 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1080 } else {
1081 p->stats.tx_errors++;
1082 if (status & TCMD_LATECOLL) {
1083 printk(KERN_ERR "%s: late collision detected.\n",
1084 dev->name);
1085 p->stats.collisions++;
1086 } else if (status & TCMD_NOCARRIER) {
1087 p->stats.tx_carrier_errors++;
1088 printk(KERN_ERR "%s: no carrier detected.\n",
1089 dev->name);
1090 } else if (status & TCMD_LOSTCTS)
1091 printk(KERN_ERR "%s: loss of CTS detected.\n",
1092 dev->name);
1093 else if (status & TCMD_UNDERRUN) {
1094 p->stats.tx_fifo_errors++;
1095 printk(KERN_ERR "%s: DMA underrun detected.\n",
1096 dev->name);
1097 } else if (status & TCMD_MAXCOLL) {
1098 printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1099 dev->name);
1100 p->stats.collisions += 16;
1101 }
1102 }
1103 #if (NUM_XMIT_BUFFS > 1)
1104 if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1105 p->xmit_last = 0;
1106 #endif
1107 netif_wake_queue(dev);
1108 }
1109
1110 /***********************************************************
1111 * (re)start the receiver
1112 */
1113
1114 static void startrecv586(struct net_device *dev)
1115 {
1116 struct priv *p = (struct priv *) dev->priv;
1117
1118 wait_for_scb_cmd(dev);
1119 wait_for_scb_cmd_ruc(dev);
1120 writew(make16(p->rfd_first), &p->scb->rfa_offset);
1121 writeb(RUC_START, &p->scb->cmd_ruc);
1122 ni_attn586(); /* start cmd. */
1123 wait_for_scb_cmd_ruc(dev);
1124 /* wait for accept cmd. (no timeout!!) */
1125 }
1126
1127 static void ni52_timeout(struct net_device *dev)
1128 {
1129 struct priv *p = (struct priv *) dev->priv;
1130 #ifndef NO_NOPCOMMANDS
1131 if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1132 netif_wake_queue(dev);
1133 #ifdef DEBUG
1134 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1135 dev->name);
1136 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1137 dev->name, (int)p->xmit_cmds[0]->cmd_status,
1138 readw(&p->nop_cmds[0]->cmd_status),
1139 readw(&p->nop_cmds[1]->cmd_status),
1140 p->nop_point);
1141 #endif
1142 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1143 ni_attn586();
1144 wait_for_scb_cmd(dev);
1145 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1146 writeb(CUC_START, &p->scb->cmd_cuc);
1147 ni_attn586();
1148 wait_for_scb_cmd(dev);
1149 dev->trans_start = jiffies;
1150 return 0;
1151 }
1152 #endif
1153 {
1154 #ifdef DEBUG
1155 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1156 dev->name, readb(&p->scb->cus));
1157 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1158 dev->name,
1159 readw(&p->xmit_cmds[0]->cmd_status),
1160 readw(&p->xmit_cmds[1]->cmd_status));
1161 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1162 dev->name);
1163 #endif
1164 ni52_close(dev);
1165 ni52_open(dev);
1166 }
1167 dev->trans_start = jiffies;
1168 }
1169
1170 /******************************************************
1171 * send frame
1172 */
1173
1174 static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
1175 {
1176 int len, i;
1177 #ifndef NO_NOPCOMMANDS
1178 int next_nop;
1179 #endif
1180 struct priv *p = (struct priv *) dev->priv;
1181
1182 if (skb->len > XMIT_BUFF_SIZE) {
1183 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);
1184 return 0;
1185 }
1186
1187 netif_stop_queue(dev);
1188
1189 memcpy_toio(p->xmit_cbuffs[p->xmit_count], skb->data, skb->len);
1190 len = skb->len;
1191 if (len < ETH_ZLEN) {
1192 len = ETH_ZLEN;
1193 memset_io(p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1194 len - skb->len);
1195 }
1196
1197 #if (NUM_XMIT_BUFFS == 1)
1198 # ifdef NO_NOPCOMMANDS
1199
1200 #ifdef DEBUG
1201 if (readb(&p->scb->cus) & CU_ACTIVE) {
1202 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1203 printk(KERN_ERR "%s: stat: %04x %04x\n",
1204 dev->name, readb(&p->scb->cus),
1205 readw(&p->xmit_cmds[0]->cmd_status));
1206 }
1207 #endif
1208 writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1209 for (i = 0; i < 16; i++) {
1210 writew(0, &p->xmit_cmds[0]->cmd_status);
1211 wait_for_scb_cmd(dev);
1212 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1213 writeb(CUC_RESUME, &p->scb->cmd_cuc);
1214 else {
1215 writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1216 writeb(CUC_START, &p->scb->cmd_cuc);
1217 }
1218 ni_attn586();
1219 dev->trans_start = jiffies;
1220 if (!i)
1221 dev_kfree_skb(skb);
1222 wait_for_scb_cmd(dev);
1223 /* test it, because CU sometimes doesn't start immediately */
1224 if (readb(&p->scb->cus) & CU_ACTIVE)
1225 break;
1226 if (readw(&p->xmit_cmds[0]->cmd_status))
1227 break;
1228 if (i == 15)
1229 printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1230 }
1231 # else
1232 next_nop = (p->nop_point + 1) & 0x1;
1233 writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1234 writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1235 writew(make16(p->nop_cmds[next_nop]),
1236 &p->nop_cmds[next_nop]->cmd_link);
1237 writew(0, &p->xmit_cmds[0]->cmd_status);
1238 writew(0, &p->nop_cmds[next_nop]->cmd_status);
1239
1240 writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1241 dev->trans_start = jiffies;
1242 p->nop_point = next_nop;
1243 dev_kfree_skb(skb);
1244 # endif
1245 #else
1246 writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1247 next_nop = p->xmit_count + 1
1248 if (next_nop == NUM_XMIT_BUFFS)
1249 next_nop = 0;
1250 writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1251 /* linkpointer of xmit-command already points to next nop cmd */
1252 writew(make16(p->nop_cmds[next_nop]),
1253 &p->nop_cmds[next_nop]->cmd_link);
1254 writew(0, &p->nop_cmds[next_nop]->cmd_status);
1255 writew(make16(p->xmit_cmds[p->xmit_count]),
1256 &p->nop_cmds[p->xmit_count]->cmd_link);
1257 dev->trans_start = jiffies;
1258 p->xmit_count = next_nop;
1259 {
1260 unsigned long flags;
1261 spin_lock_irqsave(&p->spinlock);
1262 if (p->xmit_count != p->xmit_last)
1263 netif_wake_queue(dev);
1264 spin_unlock_irqrestore(&p->spinlock);
1265 }
1266 dev_kfree_skb(skb);
1267 #endif
1268 return 0;
1269 }
1270
1271 /*******************************************
1272 * Someone wanna have the statistics
1273 */
1274
1275 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1276 {
1277 struct priv *p = (struct priv *) dev->priv;
1278 unsigned short crc, aln, rsc, ovrn;
1279
1280 /* Get error-statistics from the ni82586 */
1281 crc = readw(&p->scb->crc_errs);
1282 writew(0, &p->scb->crc_errs);
1283 aln = readw(&p->scb->aln_errs);
1284 writew(0, &p->scb->aln_errs);
1285 rsc = readw(&p->scb->rsc_errs);
1286 writew(0, &p->scb->rsc_errs);
1287 ovrn = readw(&p->scb->ovrn_errs);
1288 writew(0, &p->scb->ovrn_errs);
1289
1290 p->stats.rx_crc_errors += crc;
1291 p->stats.rx_fifo_errors += ovrn;
1292 p->stats.rx_frame_errors += aln;
1293 p->stats.rx_dropped += rsc;
1294
1295 return &p->stats;
1296 }
1297
1298 /********************************************************
1299 * Set MC list ..
1300 */
1301
1302 static void set_multicast_list(struct net_device *dev)
1303 {
1304 netif_stop_queue(dev);
1305 ni_disint();
1306 alloc586(dev);
1307 init586(dev);
1308 startrecv586(dev);
1309 ni_enaint();
1310 netif_wake_queue(dev);
1311 }
1312
1313 #ifdef MODULE
1314 static struct net_device *dev_ni52;
1315
1316 module_param(io, int, 0);
1317 module_param(irq, int, 0);
1318 module_param(memstart, long, 0);
1319 module_param(memend, long, 0);
1320 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1321 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1322 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1323 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1324
1325 int __init init_module(void)
1326 {
1327 if (io <= 0x0 || !memend || !memstart || irq < 2) {
1328 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1329 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1330 return -ENODEV;
1331 }
1332 dev_ni52 = ni52_probe(-1);
1333 if (IS_ERR(dev_ni52))
1334 return PTR_ERR(dev_ni52);
1335 return 0;
1336 }
1337
1338 void __exit cleanup_module(void)
1339 {
1340 struct priv *p = dev_ni52->priv;
1341 unregister_netdev(dev_ni52);
1342 iounmap(p->mapped);
1343 release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1344 free_netdev(dev_ni52);
1345 }
1346 #endif /* MODULE */
1347
1348 MODULE_LICENSE("GPL");
1349
1350 /*
1351 * END: linux/drivers/net/ni52.c
1352 */
Support for the Chinese Samsung S3C2440 based development boards