1 /*
2 net-3-driver for the 3c523 Etherlink/MC card (i82586 Ethernet chip)
3
4
5 This is an extension to the Linux operating system, and is covered by the
6 same GNU General Public License that covers that work.
7
8 Copyright 1995, 1996 by Chris Beauregard (cpbeaure@undergrad.math.uwaterloo.ca)
9
10 This is basically Michael Hipp's ni52 driver, with a new probing
11 algorithm and some minor changes to the 82586 CA and reset routines.
12 Thanks a lot Michael for a really clean i82586 implementation! Unless
13 otherwise documented in ni52.c, any bugs are mine.
14
15 Contrary to the Ethernet-HOWTO, this isn't based on the 3c507 driver in
16 any way. The ni52 is a lot easier to modify.
17
18 sources:
19 ni52.c
20
21 Crynwr packet driver collection was a great reference for my first
22 attempt at this sucker. The 3c507 driver also helped, until I noticed
23 that ni52.c was a lot nicer.
24
25 EtherLink/MC: Micro Channel Ethernet Adapter Technical Reference
26 Manual, courtesy of 3Com CardFacts, documents the 3c523-specific
27 stuff. Information on CardFacts is found in the Ethernet HOWTO.
28 Also see <a href="http://www.3com.com/">
29
30 Microprocessor Communications Support Chips, T.J. Byers, ISBN
31 0-444-01224-9, has a section on the i82586. It tells you just enough
32 to know that you really don't want to learn how to program the chip.
33
34 The original device probe code was stolen from ps2esdi.c
35
36 Known Problems:
37 Since most of the code was stolen from ni52.c, you'll run across the
38 same bugs in the 0.62 version of ni52.c, plus maybe a few because of
39 the 3c523 idiosynchacies. The 3c523 has 16K of RAM though, so there
40 shouldn't be the overrun problem that the 8K ni52 has.
41
42 This driver is for a 16K adapter. It should work fine on the 64K
43 adapters, but it will only use one of the 4 banks of RAM. Modifying
44 this for the 64K version would require a lot of heinous bank
45 switching, which I'm sure not interested in doing. If you try to
46 implement a bank switching version, you'll basically have to remember
47 what bank is enabled and do a switch everytime you access a memory
48 location that's not current. You'll also have to remap pointers on
49 the driver side, because it only knows about 16K of the memory.
50 Anyone desperate or masochistic enough to try?
51
52 It seems to be stable now when multiple transmit buffers are used. I
53 can't see any performance difference, but then I'm working on a 386SX.
54
55 Multicast doesn't work. It doesn't even pretend to work. Don't use
56 it. Don't compile your kernel with multicast support. I don't know
57 why.
58
59 Features:
60 This driver is useable as a loadable module. If you try to specify an
61 IRQ or a IO address (via insmod 3c523.o irq=xx io=0xyyy), it will
62 search the MCA slots until it finds a 3c523 with the specified
63 parameters.
64
65 This driver does support multiple ethernet cards when used as a module
66 (up to MAX_3C523_CARDS, the default being 4)
67
68 This has been tested with both BNC and TP versions, internal and
69 external transceivers. Haven't tested with the 64K version (that I
70 know of).
71
72 History:
73 Jan 1st, 1996
74 first public release
75 Feb 4th, 1996
76 update to 1.3.59, incorporated multicast diffs from ni52.c
77 Feb 15th, 1996
78 added shared irq support
79 Apr 1999
80 added support for multiple cards when used as a module
81 added option to disable multicast as is causes problems
82 Ganesh Sittampalam <ganesh.sittampalam@magdalen.oxford.ac.uk>
83 Stuart Adamson <stuart.adamson@compsoc.net>
84 Nov 2001
85 added support for ethtool (jgarzik)
86
87 $Header: /fsys2/home/chrisb/linux-1.3.59-MCA/drivers/net/RCS/3c523.c,v 1.1 1996/02/05 01:53:46 chrisb Exp chrisb $
88 */
89
90 #define DRV_NAME "3c523"
91 #define DRV_VERSION "17-Nov-2001"
92
93 #include <linux/init.h>
94 #include <linux/netdevice.h>
95 #include <linux/etherdevice.h>
96 #include <linux/module.h>
97 #include <linux/kernel.h>
98 #include <linux/string.h>
99 #include <linux/errno.h>
100 #include <linux/ioport.h>
101 #include <linux/skbuff.h>
102 #include <linux/slab.h>
103 #include <linux/interrupt.h>
104 #include <linux/delay.h>
105 #include <linux/mca-legacy.h>
106 #include <linux/ethtool.h>
107 #include <linux/bitops.h>
108
109 #include <asm/uaccess.h>
110 #include <asm/processor.h>
111 #include <asm/io.h>
112
113 #include "3c523.h"
114
115 /*************************************************************************/
116 #define DEBUG /* debug on */
117 #define SYSBUSVAL 0 /* 1 = 8 Bit, 0 = 16 bit - 3c523 only does 16 bit */
118 #undef ELMC_MULTICAST /* Disable multicast support as it is somewhat seriously broken at the moment */
119
120 #define make32(ptr16) (p->memtop + (short) (ptr16) )
121 #define make24(ptr32) ((char *) (ptr32) - p->base)
122 #define make16(ptr32) ((unsigned short) ((unsigned long) (ptr32) - (unsigned long) p->memtop ))
123
124 /*************************************************************************/
125 /*
126 Tables to which we can map values in the configuration registers.
127 */
128 static int irq_table[] __initdata = {
129 12, 7, 3, 9
130 };
131
132 static int csr_table[] __initdata = {
133 0x300, 0x1300, 0x2300, 0x3300
134 };
135
136 static int shm_table[] __initdata = {
137 0x0c0000, 0x0c8000, 0x0d0000, 0x0d8000
138 };
139
140 /******************* how to calculate the buffers *****************************
141
142
143 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
144 * --------------- in a different (more stable?) mode. Only in this mode it's
145 * possible to configure the driver with 'NO_NOPCOMMANDS'
146
147 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
148 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
149 sizeof(rfd) = 24; sizeof(rbd) = 12;
150 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
151 sizeof(nop_cmd) = 8;
152
153 * if you don't know the driver, better do not change this values: */
154
155 #define RECV_BUFF_SIZE 1524 /* slightly oversized */
156 #define XMIT_BUFF_SIZE 1524 /* slightly oversized */
157 #define NUM_XMIT_BUFFS 1 /* config for both, 8K and 16K shmem */
158 #define NUM_RECV_BUFFS_8 4 /* config for 8K shared mem */
159 #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
160
161 #if (NUM_XMIT_BUFFS == 1)
162 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
163 #endif
164
165 /**************************************************************************/
166
167 #define DELAY(x) { mdelay(32 * x); }
168
169 /* a much shorter delay: */
170 #define DELAY_16(); { udelay(16) ; }
171
172 /* wait for command with timeout: */
173 #define WAIT_4_SCB_CMD() { int i; \
174 for(i=0;i<1024;i++) { \
175 if(!p->scb->cmd) break; \
176 DELAY_16(); \
177 if(i == 1023) { \
178 printk(KERN_WARNING "%s:%d: scb_cmd timed out .. resetting i82586\n",\
179 dev->name,__LINE__); \
180 elmc_id_reset586(); } } }
181
182 static irqreturn_t elmc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr);
183 static int elmc_open(struct net_device *dev);
184 static int elmc_close(struct net_device *dev);
185 static int elmc_send_packet(struct sk_buff *, struct net_device *);
186 static struct net_device_stats *elmc_get_stats(struct net_device *dev);
187 static void elmc_timeout(struct net_device *dev);
188 #ifdef ELMC_MULTICAST
189 static void set_multicast_list(struct net_device *dev);
190 #endif
191 static struct ethtool_ops netdev_ethtool_ops;
192
193 /* helper-functions */
194 static int init586(struct net_device *dev);
195 static int check586(struct net_device *dev, unsigned long where, unsigned size);
196 static void alloc586(struct net_device *dev);
197 static void startrecv586(struct net_device *dev);
198 static void *alloc_rfa(struct net_device *dev, void *ptr);
199 static void elmc_rcv_int(struct net_device *dev);
200 static void elmc_xmt_int(struct net_device *dev);
201 static void elmc_rnr_int(struct net_device *dev);
202
203 struct priv {
204 struct net_device_stats stats;
205 unsigned long base;
206 char *memtop;
207 unsigned long mapped_start; /* Start of ioremap */
208 volatile struct rfd_struct *rfd_last, *rfd_top, *rfd_first;
209 volatile struct scp_struct *scp; /* volatile is important */
210 volatile struct iscp_struct *iscp; /* volatile is important */
211 volatile struct scb_struct *scb; /* volatile is important */
212 volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
213 #if (NUM_XMIT_BUFFS == 1)
214 volatile struct transmit_cmd_struct *xmit_cmds[2];
215 volatile struct nop_cmd_struct *nop_cmds[2];
216 #else
217 volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
218 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
219 #endif
220 volatile int nop_point, num_recv_buffs;
221 volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
222 volatile int xmit_count, xmit_last;
223 volatile int slot;
224 };
225
226 #define elmc_attn586() {elmc_do_attn586(dev->base_addr,ELMC_CTRL_INTE);}
227 #define elmc_reset586() {elmc_do_reset586(dev->base_addr,ELMC_CTRL_INTE);}
228
229 /* with interrupts disabled - this will clear the interrupt bit in the
230 3c523 control register, and won't put it back. This effectively
231 disables interrupts on the card. */
232 #define elmc_id_attn586() {elmc_do_attn586(dev->base_addr,0);}
233 #define elmc_id_reset586() {elmc_do_reset586(dev->base_addr,0);}
234
235 /*************************************************************************/
236 /*
237 Do a Channel Attention on the 3c523. This is extremely board dependent.
238 */
239 static void elmc_do_attn586(int ioaddr, int ints)
240 {
241 /* the 3c523 requires a minimum of 500 ns. The delays here might be
242 a little too large, and hence they may cut the performance of the
243 card slightly. If someone who knows a little more about Linux
244 timing would care to play with these, I'd appreciate it. */
245
246 /* this bit masking stuff is crap. I'd rather have separate
247 registers with strobe triggers for each of these functions. <sigh>
248 Ya take what ya got. */
249
250 outb(ELMC_CTRL_RST | 0x3 | ELMC_CTRL_CA | ints, ioaddr + ELMC_CTRL);
251 DELAY_16(); /* > 500 ns */
252 outb(ELMC_CTRL_RST | 0x3 | ints, ioaddr + ELMC_CTRL);
253 }
254
255 /*************************************************************************/
256 /*
257 Reset the 82586 on the 3c523. Also very board dependent.
258 */
259 static void elmc_do_reset586(int ioaddr, int ints)
260 {
261 /* toggle the RST bit low then high */
262 outb(0x3 | ELMC_CTRL_LBK, ioaddr + ELMC_CTRL);
263 DELAY_16(); /* > 500 ns */
264 outb(ELMC_CTRL_RST | ELMC_CTRL_LBK | 0x3, ioaddr + ELMC_CTRL);
265
266 elmc_do_attn586(ioaddr, ints);
267 }
268
269 /**********************************************
270 * close device
271 */
272
273 static int elmc_close(struct net_device *dev)
274 {
275 netif_stop_queue(dev);
276 elmc_id_reset586(); /* the hard way to stop the receiver */
277 free_irq(dev->irq, dev);
278 return 0;
279 }
280
281 /**********************************************
282 * open device
283 */
284
285 static int elmc_open(struct net_device *dev)
286 {
287 int ret;
288
289 elmc_id_attn586(); /* disable interrupts */
290
291 ret = request_irq(dev->irq, &elmc_interrupt, SA_SHIRQ | SA_SAMPLE_RANDOM,
292 dev->name, dev);
293 if (ret) {
294 printk(KERN_ERR "%s: couldn't get irq %d\n", dev->name, dev->irq);
295 elmc_id_reset586();
296 return ret;
297 }
298 alloc586(dev);
299 init586(dev);
300 startrecv586(dev);
301 netif_start_queue(dev);
302 return 0; /* most done by init */
303 }
304
305 /**********************************************
306 * Check to see if there's an 82586 out there.
307 */
308
309 static int __init check586(struct net_device *dev, unsigned long where, unsigned size)
310 {
311 struct priv *p = (struct priv *) dev->priv;
312 char *iscp_addrs[2];
313 int i = 0;
314
315 p->base = (unsigned long) isa_bus_to_virt((unsigned long)where) + size - 0x01000000;
316 p->memtop = isa_bus_to_virt((unsigned long)where) + size;
317 p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
318 memset((char *) p->scp, 0, sizeof(struct scp_struct));
319 p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */
320
321 iscp_addrs[0] = isa_bus_to_virt((unsigned long)where);
322 iscp_addrs[1] = (char *) p->scp - sizeof(struct iscp_struct);
323
324 for (i = 0; i < 2; i++) {
325 p->iscp = (struct iscp_struct *) iscp_addrs[i];
326 memset((char *) p->iscp, 0, sizeof(struct iscp_struct));
327
328 p->scp->iscp = make24(p->iscp);
329 p->iscp->busy = 1;
330
331 elmc_id_reset586();
332
333 /* reset586 does an implicit CA */
334
335 /* apparently, you sometimes have to kick the 82586 twice... */
336 elmc_id_attn586();
337 DELAY(1);
338
339 if (p->iscp->busy) { /* i82586 clears 'busy' after successful init */
340 return 0;
341 }
342 }
343 return 1;
344 }
345
346 /******************************************************************
347 * set iscp at the right place, called by elmc_probe and open586.
348 */
349
350 void alloc586(struct net_device *dev)
351 {
352 struct priv *p = (struct priv *) dev->priv;
353
354 elmc_id_reset586();
355 DELAY(2);
356
357 p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
358 p->scb = (struct scb_struct *) isa_bus_to_virt(dev->mem_start);
359 p->iscp = (struct iscp_struct *) ((char *) p->scp - sizeof(struct iscp_struct));
360
361 memset((char *) p->iscp, 0, sizeof(struct iscp_struct));
362 memset((char *) p->scp, 0, sizeof(struct scp_struct));
363
364 p->scp->iscp = make24(p->iscp);
365 p->scp->sysbus = SYSBUSVAL;
366 p->iscp->scb_offset = make16(p->scb);
367
368 p->iscp->busy = 1;
369 elmc_id_reset586();
370 elmc_id_attn586();
371
372 DELAY(2);
373
374 if (p->iscp->busy) {
375 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
376 }
377 memset((char *) p->scb, 0, sizeof(struct scb_struct));
378 }
379
380 /*****************************************************************/
381
382 static int elmc_getinfo(char *buf, int slot, void *d)
383 {
384 int len = 0;
385 struct net_device *dev = (struct net_device *) d;
386 int i;
387
388 if (dev == NULL)
389 return len;
390
391 len += sprintf(buf + len, "Revision: 0x%x\n",
392 inb(dev->base_addr + ELMC_REVISION) & 0xf);
393 len += sprintf(buf + len, "IRQ: %d\n", dev->irq);
394 len += sprintf(buf + len, "IO Address: %#lx-%#lx\n", dev->base_addr,
395 dev->base_addr + ELMC_IO_EXTENT);
396 len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start,
397 dev->mem_end - 1);
398 len += sprintf(buf + len, "Transceiver: %s\n", dev->if_port ?
399 "External" : "Internal");
400 len += sprintf(buf + len, "Device: %s\n", dev->name);
401 len += sprintf(buf + len, "Hardware Address:");
402 for (i = 0; i < 6; i++) {
403 len += sprintf(buf + len, " %02x", dev->dev_addr[i]);
404 }
405 buf[len++] = '\n';
406 buf[len] = 0;
407
408 return len;
409 } /* elmc_getinfo() */
410
411 /*****************************************************************/
412
413 static int __init do_elmc_probe(struct net_device *dev)
414 {
415 static int slot;
416 int base_addr = dev->base_addr;
417 int irq = dev->irq;
418 u_char status = 0;
419 u_char revision = 0;
420 int i = 0;
421 unsigned int size = 0;
422 int retval;
423 struct priv *pr = dev->priv;
424
425 SET_MODULE_OWNER(dev);
426 if (MCA_bus == 0) {
427 return -ENODEV;
428 }
429 /* search through the slots for the 3c523. */
430 slot = mca_find_adapter(ELMC_MCA_ID, 0);
431 while (slot != -1) {
432 status = mca_read_stored_pos(slot, 2);
433
434 dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6];
435 dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1];
436
437 /*
438 If we're trying to match a specified irq or IO address,
439 we'll reject a match unless it's what we're looking for.
440 Also reject it if the card is already in use.
441 */
442
443 if ((irq && irq != dev->irq) ||
444 (base_addr && base_addr != dev->base_addr)) {
445 slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
446 continue;
447 }
448 if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) {
449 slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
450 continue;
451 }
452
453 /* found what we're looking for... */
454 break;
455 }
456
457 /* we didn't find any 3c523 in the slots we checked for */
458 if (slot == MCA_NOTFOUND)
459 return ((base_addr || irq) ? -ENXIO : -ENODEV);
460
461 mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC");
462 mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev);
463
464 /* if we get this far, adapter has been found - carry on */
465 printk(KERN_INFO "%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1);
466
467 /* Now we extract configuration info from the card.
468 The 3c523 provides information in two of the POS registers, but
469 the second one is only needed if we want to tell the card what IRQ
470 to use. I suspect that whoever sets the thing up initially would
471 prefer we don't screw with those things.
472
473 Note that we read the status info when we found the card...
474
475 See 3c523.h for more details.
476 */
477
478 /* revision is stored in the first 4 bits of the revision register */
479 revision = inb(dev->base_addr + ELMC_REVISION) & 0xf;
480
481 /* according to docs, we read the interrupt and write it back to
482 the IRQ select register, since the POST might not configure the IRQ
483 properly. */
484 switch (dev->irq) {
485 case 3:
486 mca_write_pos(slot, 3, 0x04);
487 break;
488 case 7:
489 mca_write_pos(slot, 3, 0x02);
490 break;
491 case 9:
492 mca_write_pos(slot, 3, 0x08);
493 break;
494 case 12:
495 mca_write_pos(slot, 3, 0x01);
496 break;
497 }
498
499 memset(pr, 0, sizeof(struct priv));
500 pr->slot = slot;
501
502 printk(KERN_INFO "%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision,
503 dev->base_addr);
504
505 /* Determine if we're using the on-board transceiver (i.e. coax) or
506 an external one. The information is pretty much useless, but I
507 guess it's worth brownie points. */
508 dev->if_port = (status & ELMC_STATUS_DISABLE_THIN);
509
510 /* The 3c523 has a 24K chunk of memory. The first 16K is the
511 shared memory, while the last 8K is for the EtherStart BIOS ROM.
512 Which we don't care much about here. We'll just tell Linux that
513 we're using 16K. MCA won't permit address space conflicts caused
514 by not mapping the other 8K. */
515 dev->mem_start = shm_table[(status & ELMC_STATUS_MEMORY_SELECT) >> 3];
516
517 /* We're using MCA, so it's a given that the information about memory
518 size is correct. The Crynwr drivers do something like this. */
519
520 elmc_id_reset586(); /* seems like a good idea before checking it... */
521
522 size = 0x4000; /* check for 16K mem */
523 if (!check586(dev, dev->mem_start, size)) {
524 printk(KERN_ERR "%s: memprobe, Can't find memory at 0x%lx!\n", dev->name,
525 dev->mem_start);
526 retval = -ENODEV;
527 goto err_out;
528 }
529 dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */
530
531 pr->memtop = isa_bus_to_virt(dev->mem_start) + size;
532 pr->base = (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
533 alloc586(dev);
534
535 elmc_id_reset586(); /* make sure it doesn't generate spurious ints */
536
537 /* set number of receive-buffs according to memsize */
538 pr->num_recv_buffs = NUM_RECV_BUFFS_16;
539
540 /* dump all the assorted information */
541 printk(KERN_INFO "%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name,
542 dev->irq, dev->if_port ? "ex" : "in",
543 dev->mem_start, dev->mem_end - 1);
544
545 /* The hardware address for the 3c523 is stored in the first six
546 bytes of the IO address. */
547 printk(KERN_INFO "%s: hardware address ", dev->name);
548 for (i = 0; i < 6; i++) {
549 dev->dev_addr[i] = inb(dev->base_addr + i);
550 printk(" %02x", dev->dev_addr[i]);
551 }
552 printk("\n");
553
554 dev->open = &elmc_open;
555 dev->stop = &elmc_close;
556 dev->get_stats = &elmc_get_stats;
557 dev->hard_start_xmit = &elmc_send_packet;
558 dev->tx_timeout = &elmc_timeout;
559 dev->watchdog_timeo = HZ;
560 #ifdef ELMC_MULTICAST
561 dev->set_multicast_list = &set_multicast_list;
562 #else
563 dev->set_multicast_list = NULL;
564 #endif
565 dev->ethtool_ops = &netdev_ethtool_ops;
566
567 /* note that we haven't actually requested the IRQ from the kernel.
568 That gets done in elmc_open(). I'm not sure that's such a good idea,
569 but it works, so I'll go with it. */
570
571 #ifndef ELMC_MULTICAST
572 dev->flags&=~IFF_MULTICAST; /* Multicast doesn't work */
573 #endif
574
575 return 0;
576 err_out:
577 mca_set_adapter_procfn(slot, NULL, NULL);
578 release_region(dev->base_addr, ELMC_IO_EXTENT);
579 return retval;
580 }
581
582 static void cleanup_card(struct net_device *dev)
583 {
584 mca_set_adapter_procfn(((struct priv *) (dev->priv))->slot, NULL, NULL);
585 release_region(dev->base_addr, ELMC_IO_EXTENT);
586 }
587
588 #ifndef MODULE
589 struct net_device * __init elmc_probe(int unit)
590 {
591 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
592 int err;
593
594 if (!dev)
595 return ERR_PTR(-ENOMEM);
596
597 sprintf(dev->name, "eth%d", unit);
598 netdev_boot_setup_check(dev);
599
600 err = do_elmc_probe(dev);
601 if (err)
602 goto out;
603 err = register_netdev(dev);
604 if (err)
605 goto out1;
606 return dev;
607 out1:
608 cleanup_card(dev);
609 out:
610 free_netdev(dev);
611 return ERR_PTR(err);
612 }
613 #endif
614
615 /**********************************************
616 * init the chip (elmc-interrupt should be disabled?!)
617 * needs a correct 'allocated' memory
618 */
619
620 static int init586(struct net_device *dev)
621 {
622 void *ptr;
623 unsigned long s;
624 int i, result = 0;
625 struct priv *p = (struct priv *) dev->priv;
626 volatile struct configure_cmd_struct *cfg_cmd;
627 volatile struct iasetup_cmd_struct *ias_cmd;
628 volatile struct tdr_cmd_struct *tdr_cmd;
629 volatile struct mcsetup_cmd_struct *mc_cmd;
630 struct dev_mc_list *dmi = dev->mc_list;
631 int num_addrs = dev->mc_count;
632
633 ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct));
634
635 cfg_cmd = (struct configure_cmd_struct *) ptr; /* configure-command */
636 cfg_cmd->cmd_status = 0;
637 cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST;
638 cfg_cmd->cmd_link = 0xffff;
639
640 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
641 cfg_cmd->fifo = 0x08; /* fifo-limit (8=tx:32/rx:64) */
642 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
643 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
644 cfg_cmd->priority = 0x00;
645 cfg_cmd->ifs = 0x60;
646 cfg_cmd->time_low = 0x00;
647 cfg_cmd->time_high = 0xf2;
648 cfg_cmd->promisc = 0;
649 if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC)) {
650 cfg_cmd->promisc = 1;
651 dev->flags |= IFF_PROMISC;
652 }
653 cfg_cmd->carr_coll = 0x00;
654
655 p->scb->cbl_offset = make16(cfg_cmd);
656
657 p->scb->cmd = CUC_START; /* cmd.-unit start */
658 elmc_id_attn586();
659
660 s = jiffies; /* warning: only active with interrupts on !! */
661 while (!(cfg_cmd->cmd_status & STAT_COMPL)) {
662 if (jiffies - s > 30*HZ/100)
663 break;
664 }
665
666 if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) {
667 printk(KERN_WARNING "%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status);
668 return 1;
669 }
670 /*
671 * individual address setup
672 */
673 ias_cmd = (struct iasetup_cmd_struct *) ptr;
674
675 ias_cmd->cmd_status = 0;
676 ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST;
677 ias_cmd->cmd_link = 0xffff;
678
679 memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN);
680
681 p->scb->cbl_offset = make16(ias_cmd);
682
683 p->scb->cmd = CUC_START; /* cmd.-unit start */
684 elmc_id_attn586();
685
686 s = jiffies;
687 while (!(ias_cmd->cmd_status & STAT_COMPL)) {
688 if (jiffies - s > 30*HZ/100)
689 break;
690 }
691
692 if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) {
693 printk(KERN_WARNING "%s (elmc): individual address setup command failed: %04x\n", dev->name, ias_cmd->cmd_status);
694 return 1;
695 }
696 /*
697 * TDR, wire check .. e.g. no resistor e.t.c
698 */
699 tdr_cmd = (struct tdr_cmd_struct *) ptr;
700
701 tdr_cmd->cmd_status = 0;
702 tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST;
703 tdr_cmd->cmd_link = 0xffff;
704 tdr_cmd->status = 0;
705
706 p->scb->cbl_offset = make16(tdr_cmd);
707
708 p->scb->cmd = CUC_START; /* cmd.-unit start */
709 elmc_attn586();
710
711 s = jiffies;
712 while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
713 if (jiffies - s > 30*HZ/100) {
714 printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
715 result = 1;
716 break;
717 }
718 }
719
720 if (!result) {
721 DELAY(2); /* wait for result */
722 result = tdr_cmd->status;
723
724 p->scb->cmd = p->scb->status & STAT_MASK;
725 elmc_id_attn586(); /* ack the interrupts */
726
727 if (result & TDR_LNK_OK) {
728 /* empty */
729 } else if (result & TDR_XCVR_PRB) {
730 printk(KERN_WARNING "%s: TDR: Transceiver problem!\n", dev->name);
731 } else if (result & TDR_ET_OPN) {
732 printk(KERN_WARNING "%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
733 } else if (result & TDR_ET_SRT) {
734 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
735 printk(KERN_WARNING "%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
736 } else {
737 printk(KERN_WARNING "%s: TDR: Unknown status %04x\n", dev->name, result);
738 }
739 }
740 /*
741 * ack interrupts
742 */
743 p->scb->cmd = p->scb->status & STAT_MASK;
744 elmc_id_attn586();
745
746 /*
747 * alloc nop/xmit-cmds
748 */
749 #if (NUM_XMIT_BUFFS == 1)
750 for (i = 0; i < 2; i++) {
751 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
752 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
753 p->nop_cmds[i]->cmd_status = 0;
754 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
755 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
756 }
757 p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr; /* transmit cmd/buff 0 */
758 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
759 #else
760 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
761 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
762 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
763 p->nop_cmds[i]->cmd_status = 0;
764 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
765 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
766 p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr; /*transmit cmd/buff 0 */
767 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
768 }
769 #endif
770
771 ptr = alloc_rfa(dev, (void *) ptr); /* init receive-frame-area */
772
773 /*
774 * Multicast setup
775 */
776
777 if (dev->mc_count) {
778 /* I don't understand this: do we really need memory after the init? */
779 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
780 if (len <= 0) {
781 printk(KERN_ERR "%s: Ooooops, no memory for MC-Setup!\n", dev->name);
782 } else {
783 if (len < num_addrs) {
784 num_addrs = len;
785 printk(KERN_WARNING "%s: Sorry, can only apply %d MC-Address(es).\n",
786 dev->name, num_addrs);
787 }
788 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
789 mc_cmd->cmd_status = 0;
790 mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
791 mc_cmd->cmd_link = 0xffff;
792 mc_cmd->mc_cnt = num_addrs * 6;
793 for (i = 0; i < num_addrs; i++) {
794 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr, 6);
795 dmi = dmi->next;
796 }
797 p->scb->cbl_offset = make16(mc_cmd);
798 p->scb->cmd = CUC_START;
799 elmc_id_attn586();
800 s = jiffies;
801 while (!(mc_cmd->cmd_status & STAT_COMPL)) {
802 if (jiffies - s > 30*HZ/100)
803 break;
804 }
805 if (!(mc_cmd->cmd_status & STAT_COMPL)) {
806 printk(KERN_WARNING "%s: Can't apply multicast-address-list.\n", dev->name);
807 }
808 }
809 }
810 /*
811 * alloc xmit-buffs / init xmit_cmds
812 */
813 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
814 p->xmit_cbuffs[i] = (char *) ptr; /* char-buffs */
815 ptr = (char *) ptr + XMIT_BUFF_SIZE;
816 p->xmit_buffs[i] = (struct tbd_struct *) ptr; /* TBD */
817 ptr = (char *) ptr + sizeof(struct tbd_struct);
818 if ((void *) ptr > (void *) p->iscp) {
819 printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", dev->name);
820 return 1;
821 }
822 memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct));
823 memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct));
824 p->xmit_cmds[i]->cmd_status = STAT_COMPL;
825 p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
826 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
827 p->xmit_buffs[i]->next = 0xffff;
828 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
829 }
830
831 p->xmit_count = 0;
832 p->xmit_last = 0;
833 #ifndef NO_NOPCOMMANDS
834 p->nop_point = 0;
835 #endif
836
837 /*
838 * 'start transmitter' (nop-loop)
839 */
840 #ifndef NO_NOPCOMMANDS
841 p->scb->cbl_offset = make16(p->nop_cmds[0]);
842 p->scb->cmd = CUC_START;
843 elmc_id_attn586();
844 WAIT_4_SCB_CMD();
845 #else
846 p->xmit_cmds[0]->cmd_link = 0xffff;
847 p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT;
848 #endif
849
850 return 0;
851 }
852
853 /******************************************************
854 * This is a helper routine for elmc_rnr_int() and init586().
855 * It sets up the Receive Frame Area (RFA).
856 */
857
858 static void *alloc_rfa(struct net_device *dev, void *ptr)
859 {
860 volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr;
861 volatile struct rbd_struct *rbd;
862 int i;
863 struct priv *p = (struct priv *) dev->priv;
864
865 memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs);
866 p->rfd_first = rfd;
867
868 for (i = 0; i < p->num_recv_buffs; i++) {
869 rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs);
870 }
871 rfd[p->num_recv_buffs - 1].last = RFD_SUSP; /* RU suspend */
872
873 ptr = (void *) (rfd + p->num_recv_buffs);
874
875 rbd = (struct rbd_struct *) ptr;
876 ptr = (void *) (rbd + p->num_recv_buffs);
877
878 /* clr descriptors */
879 memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs);
880
881 for (i = 0; i < p->num_recv_buffs; i++) {
882 rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs));
883 rbd[i].size = RECV_BUFF_SIZE;
884 rbd[i].buffer = make24(ptr);
885 ptr = (char *) ptr + RECV_BUFF_SIZE;
886 }
887
888 p->rfd_top = p->rfd_first;
889 p->rfd_last = p->rfd_first + p->num_recv_buffs - 1;
890
891 p->scb->rfa_offset = make16(p->rfd_first);
892 p->rfd_first->rbd_offset = make16(rbd);
893
894 return ptr;
895 }
896
897
898 /**************************************************
899 * Interrupt Handler ...
900 */
901
902 static irqreturn_t
903 elmc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr)
904 {
905 struct net_device *dev = (struct net_device *) dev_id;
906 unsigned short stat;
907 struct priv *p;
908
909 if (dev == NULL) {
910 printk(KERN_ERR "elmc-interrupt: irq %d for unknown device.\n", (int) -(((struct pt_regs *) reg_ptr)->orig_eax + 2));
911 return IRQ_NONE;
912 } else if (!netif_running(dev)) {
913 /* The 3c523 has this habit of generating interrupts during the
914 reset. I'm not sure if the ni52 has this same problem, but it's
915 really annoying if we haven't finished initializing it. I was
916 hoping all the elmc_id_* commands would disable this, but I
917 might have missed a few. */
918
919 elmc_id_attn586(); /* ack inter. and disable any more */
920 return IRQ_HANDLED;
921 } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) {
922 /* wasn't this device */
923 return IRQ_NONE;
924 }
925 /* reading ELMC_CTRL also clears the INT bit. */
926
927 p = (struct priv *) dev->priv;
928
929 while ((stat = p->scb->status & STAT_MASK))
930 {
931 p->scb->cmd = stat;
932 elmc_attn586(); /* ack inter. */
933
934 if (stat & STAT_CX) {
935 /* command with I-bit set complete */
936 elmc_xmt_int(dev);
937 }
938 if (stat & STAT_FR) {
939 /* received a frame */
940 elmc_rcv_int(dev);
941 }
942 #ifndef NO_NOPCOMMANDS
943 if (stat & STAT_CNA) {
944 /* CU went 'not ready' */
945 if (netif_running(dev)) {
946 printk(KERN_WARNING "%s: oops! CU has left active state. stat: %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
947 }
948 }
949 #endif
950
951 if (stat & STAT_RNR) {
952 /* RU went 'not ready' */
953
954 if (p->scb->status & RU_SUSPEND) {
955 /* special case: RU_SUSPEND */
956
957 WAIT_4_SCB_CMD();
958 p->scb->cmd = RUC_RESUME;
959 elmc_attn586();
960 } else {
961 printk(KERN_WARNING "%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
962 elmc_rnr_int(dev);
963 }
964 }
965 WAIT_4_SCB_CMD(); /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
966 if (p->scb->cmd) { /* timed out? */
967 break;
968 }
969 }
970 return IRQ_HANDLED;
971 }
972
973 /*******************************************************
974 * receive-interrupt
975 */
976
977 static void elmc_rcv_int(struct net_device *dev)
978 {
979 int status;
980 unsigned short totlen;
981 struct sk_buff *skb;
982 struct rbd_struct *rbd;
983 struct priv *p = (struct priv *) dev->priv;
984
985 for (; (status = p->rfd_top->status) & STAT_COMPL;) {
986 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
987
988 if (status & STAT_OK) { /* frame received without error? */
989 if ((totlen = rbd->status) & RBD_LAST) { /* the first and the last buffer? */
990 totlen &= RBD_MASK; /* length of this frame */
991 rbd->status = 0;
992 skb = (struct sk_buff *) dev_alloc_skb(totlen + 2);
993 if (skb != NULL) {
994 skb->dev = dev;
995 skb_reserve(skb, 2); /* 16 byte alignment */
996 skb_put(skb,totlen);
997 eth_copy_and_sum(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen,0);
998 skb->protocol = eth_type_trans(skb, dev);
999 netif_rx(skb);
1000 dev->last_rx = jiffies;
1001 p->stats.rx_packets++;
1002 p->stats.rx_bytes += totlen;
1003 } else {
1004 p->stats.rx_dropped++;
1005 }
1006 } else {
1007 printk(KERN_WARNING "%s: received oversized frame.\n", dev->name);
1008 p->stats.rx_dropped++;
1009 }
1010 } else { /* frame !(ok), only with 'save-bad-frames' */
1011 printk(KERN_WARNING "%s: oops! rfd-error-status: %04x\n", dev->name, status);
1012 p->stats.rx_errors++;
1013 }
1014 p->rfd_top->status = 0;
1015 p->rfd_top->last = RFD_SUSP;
1016 p->rfd_last->last = 0; /* delete RU_SUSP */
1017 p->rfd_last = p->rfd_top;
1018 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
1019 }
1020 }
1021
1022 /**********************************************************
1023 * handle 'Receiver went not ready'.
1024 */
1025
1026 static void elmc_rnr_int(struct net_device *dev)
1027 {
1028 struct priv *p = (struct priv *) dev->priv;
1029
1030 p->stats.rx_errors++;
1031
1032 WAIT_4_SCB_CMD(); /* wait for the last cmd */
1033 p->scb->cmd = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
1034 elmc_attn586();
1035 WAIT_4_SCB_CMD(); /* wait for accept cmd. */
1036
1037 alloc_rfa(dev, (char *) p->rfd_first);
1038 startrecv586(dev); /* restart RU */
1039
1040 printk(KERN_WARNING "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status);
1041
1042 }
1043
1044 /**********************************************************
1045 * handle xmit - interrupt
1046 */
1047
1048 static void elmc_xmt_int(struct net_device *dev)
1049 {
1050 int status;
1051 struct priv *p = (struct priv *) dev->priv;
1052
1053 status = p->xmit_cmds[p->xmit_last]->cmd_status;
1054 if (!(status & STAT_COMPL)) {
1055 printk(KERN_WARNING "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1056 }
1057 if (status & STAT_OK) {
1058 p->stats.tx_packets++;
1059 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1060 } else {
1061 p->stats.tx_errors++;
1062 if (status & TCMD_LATECOLL) {
1063 printk(KERN_WARNING "%s: late collision detected.\n", dev->name);
1064 p->stats.collisions++;
1065 } else if (status & TCMD_NOCARRIER) {
1066 p->stats.tx_carrier_errors++;
1067 printk(KERN_WARNING "%s: no carrier detected.\n", dev->name);
1068 } else if (status & TCMD_LOSTCTS) {
1069 printk(KERN_WARNING "%s: loss of CTS detected.\n", dev->name);
1070 } else if (status & TCMD_UNDERRUN) {
1071 p->stats.tx_fifo_errors++;
1072 printk(KERN_WARNING "%s: DMA underrun detected.\n", dev->name);
1073 } else if (status & TCMD_MAXCOLL) {
1074 printk(KERN_WARNING "%s: Max. collisions exceeded.\n", dev->name);
1075 p->stats.collisions += 16;
1076 }
1077 }
1078
1079 #if (NUM_XMIT_BUFFS != 1)
1080 if ((++p->xmit_last) == NUM_XMIT_BUFFS) {
1081 p->xmit_last = 0;
1082 }
1083 #endif
1084
1085 netif_wake_queue(dev);
1086 }
1087
1088 /***********************************************************
1089 * (re)start the receiver
1090 */
1091
1092 static void startrecv586(struct net_device *dev)
1093 {
1094 struct priv *p = (struct priv *) dev->priv;
1095
1096 p->scb->rfa_offset = make16(p->rfd_first);
1097 p->scb->cmd = RUC_START;
1098 elmc_attn586(); /* start cmd. */
1099 WAIT_4_SCB_CMD(); /* wait for accept cmd. (no timeout!!) */
1100 }
1101
1102 /******************************************************
1103 * timeout
1104 */
1105
1106 static void elmc_timeout(struct net_device *dev)
1107 {
1108 struct priv *p = (struct priv *) dev->priv;
1109 /* COMMAND-UNIT active? */
1110 if (p->scb->status & CU_ACTIVE) {
1111 #ifdef DEBUG
1112 printk("%s: strange ... timeout with CU active?!?\n", dev->name);
1113 printk("%s: X0: %04x N0: %04x N1: %04x %d\n", dev->name, (int) p->xmit_cmds[0]->cmd_status, (int) p->nop_cmds[0]->cmd_status, (int) p->nop_cmds[1]->cmd_status, (int) p->nop_point);
1114 #endif
1115 p->scb->cmd = CUC_ABORT;
1116 elmc_attn586();
1117 WAIT_4_SCB_CMD();
1118 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
1119 p->scb->cmd = CUC_START;
1120 elmc_attn586();
1121 WAIT_4_SCB_CMD();
1122 netif_wake_queue(dev);
1123 } else {
1124 #ifdef DEBUG
1125 printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev->name, p->scb->status);
1126 printk("%s: command-stats: %04x %04x\n", dev->name, p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status);
1127 #endif
1128 elmc_close(dev);
1129 elmc_open(dev);
1130 }
1131 }
1132
1133 /******************************************************
1134 * send frame
1135 */
1136
1137 static int elmc_send_packet(struct sk_buff *skb, struct net_device *dev)
1138 {
1139 int len;
1140 int i;
1141 #ifndef NO_NOPCOMMANDS
1142 int next_nop;
1143 #endif
1144 struct priv *p = (struct priv *) dev->priv;
1145
1146 netif_stop_queue(dev);
1147
1148 len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
1149
1150 if (len != skb->len)
1151 memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
1152 memcpy((char *) p->xmit_cbuffs[p->xmit_count], (char *) (skb->data), skb->len);
1153
1154 #if (NUM_XMIT_BUFFS == 1)
1155 #ifdef NO_NOPCOMMANDS
1156 p->xmit_buffs[0]->size = TBD_LAST | len;
1157 for (i = 0; i < 16; i++) {
1158 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1159 p->scb->cmd = CUC_START;
1160 p->xmit_cmds[0]->cmd_status = 0;
1161 elmc_attn586();
1162 dev->trans_start = jiffies;
1163 if (!i) {
1164 dev_kfree_skb(skb);
1165 }
1166 WAIT_4_SCB_CMD();
1167 if ((p->scb->status & CU_ACTIVE)) { /* test it, because CU sometimes doesn't start immediately */
1168 break;
1169 }
1170 if (p->xmit_cmds[0]->cmd_status) {
1171 break;
1172 }
1173 if (i == 15) {
1174 printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1175 }
1176 }
1177 #else
1178 next_nop = (p->nop_point + 1) & 0x1;
1179 p->xmit_buffs[0]->size = TBD_LAST | len;
1180
1181 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1182 = make16((p->nop_cmds[next_nop]));
1183 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1184
1185 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1186 dev->trans_start = jiffies;
1187 p->nop_point = next_nop;
1188 dev_kfree_skb(skb);
1189 #endif
1190 #else
1191 p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
1192 if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) {
1193 next_nop = 0;
1194 }
1195 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1196 p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1197 = make16((p->nop_cmds[next_nop]));
1198 p->nop_cmds[next_nop]->cmd_status = 0;
1199 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1200 dev->trans_start = jiffies;
1201 p->xmit_count = next_nop;
1202 if (p->xmit_count != p->xmit_last)
1203 netif_wake_queue(dev);
1204 dev_kfree_skb(skb);
1205 #endif
1206 return 0;
1207 }
1208
1209 /*******************************************
1210 * Someone wanna have the statistics
1211 */
1212
1213 static struct net_device_stats *elmc_get_stats(struct net_device *dev)
1214 {
1215 struct priv *p = (struct priv *) dev->priv;
1216 unsigned short crc, aln, rsc, ovrn;
1217
1218 crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
1219 p->scb->crc_errs -= crc;
1220 aln = p->scb->aln_errs;
1221 p->scb->aln_errs -= aln;
1222 rsc = p->scb->rsc_errs;
1223 p->scb->rsc_errs -= rsc;
1224 ovrn = p->scb->ovrn_errs;
1225 p->scb->ovrn_errs -= ovrn;
1226
1227 p->stats.rx_crc_errors += crc;
1228 p->stats.rx_fifo_errors += ovrn;
1229 p->stats.rx_frame_errors += aln;
1230 p->stats.rx_dropped += rsc;
1231
1232 return &p->stats;
1233 }
1234
1235 /********************************************************
1236 * Set MC list ..
1237 */
1238
1239 #ifdef ELMC_MULTICAST
1240 static void set_multicast_list(struct net_device *dev)
1241 {
1242 if (!dev->start) {
1243 /* without a running interface, promiscuous doesn't work */
1244 return;
1245 }
1246 dev->start = 0;
1247 alloc586(dev);
1248 init586(dev);
1249 startrecv586(dev);
1250 dev->start = 1;
1251 }
1252 #endif
1253
1254 static void netdev_get_drvinfo(struct net_device *dev,
1255 struct ethtool_drvinfo *info)
1256 {
1257 strcpy(info->driver, DRV_NAME);
1258 strcpy(info->version, DRV_VERSION);
1259 sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr);
1260 }
1261
1262 static struct ethtool_ops netdev_ethtool_ops = {
1263 .get_drvinfo = netdev_get_drvinfo,
1264 };
1265
1266 #ifdef MODULE
1267
1268 /* Increase if needed ;) */
1269 #define MAX_3C523_CARDS 4
1270
1271 static struct net_device *dev_elmc[MAX_3C523_CARDS];
1272 static int irq[MAX_3C523_CARDS];
1273 static int io[MAX_3C523_CARDS];
1274 module_param_array(irq, int, NULL, 0);
1275 module_param_array(io, int, NULL, 0);
1276 MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)");
1277 MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)");
1278
1279 int init_module(void)
1280 {
1281 int this_dev,found = 0;
1282
1283 /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */
1284 for(this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1285 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
1286 if (!dev)
1287 break;
1288 dev->irq=irq[this_dev];
1289 dev->base_addr=io[this_dev];
1290 if (do_elmc_probe(dev) == 0) {
1291 if (register_netdev(dev) == 0) {
1292 dev_elmc[this_dev] = dev;
1293 found++;
1294 continue;
1295 }
1296 cleanup_card(dev);
1297 }
1298 free_netdev(dev);
1299 if (io[this_dev]==0)
1300 break;
1301 printk(KERN_WARNING "3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]);
1302 }
1303
1304 if(found==0) {
1305 if(io[0]==0) printk(KERN_NOTICE "3c523.c: No 3c523 cards found\n");
1306 return -ENXIO;
1307 } else return 0;
1308 }
1309
1310 void cleanup_module(void)
1311 {
1312 int this_dev;
1313 for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1314 struct net_device *dev = dev_elmc[this_dev];
1315 if (dev) {
1316 unregister_netdev(dev);
1317 cleanup_card(dev);
1318 free_netdev(dev);
1319 }
1320 }
1321 }
1322
1323 #endif /* MODULE */
1324
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