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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 */
128static int irq_table[] __initdata = {
129 12, 7, 3, 9
130};
131
132static int csr_table[] __initdata = {
133 0x300, 0x1300, 0x2300, 0x3300
134};
135
136static 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
147sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
148sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
149sizeof(rfd) = 24; sizeof(rbd) = 12;
150sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
151sizeof(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
182static irqreturn_t elmc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr);
183static int elmc_open(struct net_device *dev);
184static int elmc_close(struct net_device *dev);
185static int elmc_send_packet(struct sk_buff *, struct net_device *);
186static struct net_device_stats *elmc_get_stats(struct net_device *dev);
187static void elmc_timeout(struct net_device *dev);
188#ifdef ELMC_MULTICAST
189static void set_multicast_list(struct net_device *dev);
190#endif
191static struct ethtool_ops netdev_ethtool_ops;
192
193/* helper-functions */
194static int init586(struct net_device *dev);
195static int check586(struct net_device *dev, unsigned long where, unsigned size);
196static void alloc586(struct net_device *dev);
197static void startrecv586(struct net_device *dev);
198static void *alloc_rfa(struct net_device *dev, void *ptr);
199static void elmc_rcv_int(struct net_device *dev);
200static void elmc_xmt_int(struct net_device *dev);
201static void elmc_rnr_int(struct net_device *dev);
202
203struct 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 */
239static 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 */
259static 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
273static 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
285static 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
309static 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
350void 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
382static 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
413static 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
b1fc5502005-05-12 20:11:55 -0400575 retval = register_netdev(dev);
576 if (retval)
577 goto err_out;
578
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 return 0;
580err_out:
581 mca_set_adapter_procfn(slot, NULL, NULL);
582 release_region(dev->base_addr, ELMC_IO_EXTENT);
583 return retval;
584}
585
586static void cleanup_card(struct net_device *dev)
587{
588 mca_set_adapter_procfn(((struct priv *) (dev->priv))->slot, NULL, NULL);
589 release_region(dev->base_addr, ELMC_IO_EXTENT);
590}
591
592#ifndef MODULE
593struct net_device * __init elmc_probe(int unit)
594{
595 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
596 int err;
597
598 if (!dev)
599 return ERR_PTR(-ENOMEM);
600
601 sprintf(dev->name, "eth%d", unit);
602 netdev_boot_setup_check(dev);
603
604 err = do_elmc_probe(dev);
605 if (err)
606 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 return dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608out:
609 free_netdev(dev);
610 return ERR_PTR(err);
611}
612#endif
613
614/**********************************************
615 * init the chip (elmc-interrupt should be disabled?!)
616 * needs a correct 'allocated' memory
617 */
618
619static int init586(struct net_device *dev)
620{
621 void *ptr;
622 unsigned long s;
623 int i, result = 0;
624 struct priv *p = (struct priv *) dev->priv;
625 volatile struct configure_cmd_struct *cfg_cmd;
626 volatile struct iasetup_cmd_struct *ias_cmd;
627 volatile struct tdr_cmd_struct *tdr_cmd;
628 volatile struct mcsetup_cmd_struct *mc_cmd;
629 struct dev_mc_list *dmi = dev->mc_list;
630 int num_addrs = dev->mc_count;
631
632 ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct));
633
634 cfg_cmd = (struct configure_cmd_struct *) ptr; /* configure-command */
635 cfg_cmd->cmd_status = 0;
636 cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST;
637 cfg_cmd->cmd_link = 0xffff;
638
639 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
640 cfg_cmd->fifo = 0x08; /* fifo-limit (8=tx:32/rx:64) */
641 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
642 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
643 cfg_cmd->priority = 0x00;
644 cfg_cmd->ifs = 0x60;
645 cfg_cmd->time_low = 0x00;
646 cfg_cmd->time_high = 0xf2;
647 cfg_cmd->promisc = 0;
648 if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC)) {
649 cfg_cmd->promisc = 1;
650 dev->flags |= IFF_PROMISC;
651 }
652 cfg_cmd->carr_coll = 0x00;
653
654 p->scb->cbl_offset = make16(cfg_cmd);
655
656 p->scb->cmd = CUC_START; /* cmd.-unit start */
657 elmc_id_attn586();
658
659 s = jiffies; /* warning: only active with interrupts on !! */
660 while (!(cfg_cmd->cmd_status & STAT_COMPL)) {
661 if (jiffies - s > 30*HZ/100)
662 break;
663 }
664
665 if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) {
666 printk(KERN_WARNING "%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status);
667 return 1;
668 }
669 /*
670 * individual address setup
671 */
672 ias_cmd = (struct iasetup_cmd_struct *) ptr;
673
674 ias_cmd->cmd_status = 0;
675 ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST;
676 ias_cmd->cmd_link = 0xffff;
677
678 memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN);
679
680 p->scb->cbl_offset = make16(ias_cmd);
681
682 p->scb->cmd = CUC_START; /* cmd.-unit start */
683 elmc_id_attn586();
684
685 s = jiffies;
686 while (!(ias_cmd->cmd_status & STAT_COMPL)) {
687 if (jiffies - s > 30*HZ/100)
688 break;
689 }
690
691 if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) {
692 printk(KERN_WARNING "%s (elmc): individual address setup command failed: %04x\n", dev->name, ias_cmd->cmd_status);
693 return 1;
694 }
695 /*
696 * TDR, wire check .. e.g. no resistor e.t.c
697 */
698 tdr_cmd = (struct tdr_cmd_struct *) ptr;
699
700 tdr_cmd->cmd_status = 0;
701 tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST;
702 tdr_cmd->cmd_link = 0xffff;
703 tdr_cmd->status = 0;
704
705 p->scb->cbl_offset = make16(tdr_cmd);
706
707 p->scb->cmd = CUC_START; /* cmd.-unit start */
708 elmc_attn586();
709
710 s = jiffies;
711 while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
712 if (jiffies - s > 30*HZ/100) {
713 printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
714 result = 1;
715 break;
716 }
717 }
718
719 if (!result) {
720 DELAY(2); /* wait for result */
721 result = tdr_cmd->status;
722
723 p->scb->cmd = p->scb->status & STAT_MASK;
724 elmc_id_attn586(); /* ack the interrupts */
725
726 if (result & TDR_LNK_OK) {
727 /* empty */
728 } else if (result & TDR_XCVR_PRB) {
729 printk(KERN_WARNING "%s: TDR: Transceiver problem!\n", dev->name);
730 } else if (result & TDR_ET_OPN) {
731 printk(KERN_WARNING "%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
732 } else if (result & TDR_ET_SRT) {
733 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
734 printk(KERN_WARNING "%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
735 } else {
736 printk(KERN_WARNING "%s: TDR: Unknown status %04x\n", dev->name, result);
737 }
738 }
739 /*
740 * ack interrupts
741 */
742 p->scb->cmd = p->scb->status & STAT_MASK;
743 elmc_id_attn586();
744
745 /*
746 * alloc nop/xmit-cmds
747 */
748#if (NUM_XMIT_BUFFS == 1)
749 for (i = 0; i < 2; i++) {
750 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
751 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
752 p->nop_cmds[i]->cmd_status = 0;
753 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
754 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
755 }
756 p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr; /* transmit cmd/buff 0 */
757 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
758#else
759 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
760 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
761 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
762 p->nop_cmds[i]->cmd_status = 0;
763 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
764 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
765 p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr; /*transmit cmd/buff 0 */
766 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
767 }
768#endif
769
770 ptr = alloc_rfa(dev, (void *) ptr); /* init receive-frame-area */
771
772 /*
773 * Multicast setup
774 */
775
776 if (dev->mc_count) {
777 /* I don't understand this: do we really need memory after the init? */
778 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
779 if (len <= 0) {
780 printk(KERN_ERR "%s: Ooooops, no memory for MC-Setup!\n", dev->name);
781 } else {
782 if (len < num_addrs) {
783 num_addrs = len;
784 printk(KERN_WARNING "%s: Sorry, can only apply %d MC-Address(es).\n",
785 dev->name, num_addrs);
786 }
787 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
788 mc_cmd->cmd_status = 0;
789 mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
790 mc_cmd->cmd_link = 0xffff;
791 mc_cmd->mc_cnt = num_addrs * 6;
792 for (i = 0; i < num_addrs; i++) {
793 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr, 6);
794 dmi = dmi->next;
795 }
796 p->scb->cbl_offset = make16(mc_cmd);
797 p->scb->cmd = CUC_START;
798 elmc_id_attn586();
799 s = jiffies;
800 while (!(mc_cmd->cmd_status & STAT_COMPL)) {
801 if (jiffies - s > 30*HZ/100)
802 break;
803 }
804 if (!(mc_cmd->cmd_status & STAT_COMPL)) {
805 printk(KERN_WARNING "%s: Can't apply multicast-address-list.\n", dev->name);
806 }
807 }
808 }
809 /*
810 * alloc xmit-buffs / init xmit_cmds
811 */
812 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
813 p->xmit_cbuffs[i] = (char *) ptr; /* char-buffs */
814 ptr = (char *) ptr + XMIT_BUFF_SIZE;
815 p->xmit_buffs[i] = (struct tbd_struct *) ptr; /* TBD */
816 ptr = (char *) ptr + sizeof(struct tbd_struct);
817 if ((void *) ptr > (void *) p->iscp) {
818 printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", dev->name);
819 return 1;
820 }
821 memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct));
822 memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct));
823 p->xmit_cmds[i]->cmd_status = STAT_COMPL;
824 p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
825 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
826 p->xmit_buffs[i]->next = 0xffff;
827 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
828 }
829
830 p->xmit_count = 0;
831 p->xmit_last = 0;
832#ifndef NO_NOPCOMMANDS
833 p->nop_point = 0;
834#endif
835
836 /*
837 * 'start transmitter' (nop-loop)
838 */
839#ifndef NO_NOPCOMMANDS
840 p->scb->cbl_offset = make16(p->nop_cmds[0]);
841 p->scb->cmd = CUC_START;
842 elmc_id_attn586();
843 WAIT_4_SCB_CMD();
844#else
845 p->xmit_cmds[0]->cmd_link = 0xffff;
846 p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT;
847#endif
848
849 return 0;
850}
851
852/******************************************************
853 * This is a helper routine for elmc_rnr_int() and init586().
854 * It sets up the Receive Frame Area (RFA).
855 */
856
857static void *alloc_rfa(struct net_device *dev, void *ptr)
858{
859 volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr;
860 volatile struct rbd_struct *rbd;
861 int i;
862 struct priv *p = (struct priv *) dev->priv;
863
864 memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs);
865 p->rfd_first = rfd;
866
867 for (i = 0; i < p->num_recv_buffs; i++) {
868 rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs);
869 }
870 rfd[p->num_recv_buffs - 1].last = RFD_SUSP; /* RU suspend */
871
872 ptr = (void *) (rfd + p->num_recv_buffs);
873
874 rbd = (struct rbd_struct *) ptr;
875 ptr = (void *) (rbd + p->num_recv_buffs);
876
877 /* clr descriptors */
878 memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs);
879
880 for (i = 0; i < p->num_recv_buffs; i++) {
881 rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs));
882 rbd[i].size = RECV_BUFF_SIZE;
883 rbd[i].buffer = make24(ptr);
884 ptr = (char *) ptr + RECV_BUFF_SIZE;
885 }
886
887 p->rfd_top = p->rfd_first;
888 p->rfd_last = p->rfd_first + p->num_recv_buffs - 1;
889
890 p->scb->rfa_offset = make16(p->rfd_first);
891 p->rfd_first->rbd_offset = make16(rbd);
892
893 return ptr;
894}
895
896
897/**************************************************
898 * Interrupt Handler ...
899 */
900
901static irqreturn_t
902elmc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr)
903{
904 struct net_device *dev = (struct net_device *) dev_id;
905 unsigned short stat;
906 struct priv *p;
907
908 if (dev == NULL) {
909 printk(KERN_ERR "elmc-interrupt: irq %d for unknown device.\n", (int) -(((struct pt_regs *) reg_ptr)->orig_eax + 2));
910 return IRQ_NONE;
911 } else if (!netif_running(dev)) {
912 /* The 3c523 has this habit of generating interrupts during the
913 reset. I'm not sure if the ni52 has this same problem, but it's
914 really annoying if we haven't finished initializing it. I was
915 hoping all the elmc_id_* commands would disable this, but I
916 might have missed a few. */
917
918 elmc_id_attn586(); /* ack inter. and disable any more */
919 return IRQ_HANDLED;
920 } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) {
921 /* wasn't this device */
922 return IRQ_NONE;
923 }
924 /* reading ELMC_CTRL also clears the INT bit. */
925
926 p = (struct priv *) dev->priv;
927
928 while ((stat = p->scb->status & STAT_MASK))
929 {
930 p->scb->cmd = stat;
931 elmc_attn586(); /* ack inter. */
932
933 if (stat & STAT_CX) {
934 /* command with I-bit set complete */
935 elmc_xmt_int(dev);
936 }
937 if (stat & STAT_FR) {
938 /* received a frame */
939 elmc_rcv_int(dev);
940 }
941#ifndef NO_NOPCOMMANDS
942 if (stat & STAT_CNA) {
943 /* CU went 'not ready' */
944 if (netif_running(dev)) {
945 printk(KERN_WARNING "%s: oops! CU has left active state. stat: %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
946 }
947 }
948#endif
949
950 if (stat & STAT_RNR) {
951 /* RU went 'not ready' */
952
953 if (p->scb->status & RU_SUSPEND) {
954 /* special case: RU_SUSPEND */
955
956 WAIT_4_SCB_CMD();
957 p->scb->cmd = RUC_RESUME;
958 elmc_attn586();
959 } else {
960 printk(KERN_WARNING "%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
961 elmc_rnr_int(dev);
962 }
963 }
964 WAIT_4_SCB_CMD(); /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
965 if (p->scb->cmd) { /* timed out? */
966 break;
967 }
968 }
969 return IRQ_HANDLED;
970}
971
972/*******************************************************
973 * receive-interrupt
974 */
975
976static void elmc_rcv_int(struct net_device *dev)
977{
978 int status;
979 unsigned short totlen;
980 struct sk_buff *skb;
981 struct rbd_struct *rbd;
982 struct priv *p = (struct priv *) dev->priv;
983
984 for (; (status = p->rfd_top->status) & STAT_COMPL;) {
985 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
986
987 if (status & STAT_OK) { /* frame received without error? */
988 if ((totlen = rbd->status) & RBD_LAST) { /* the first and the last buffer? */
989 totlen &= RBD_MASK; /* length of this frame */
990 rbd->status = 0;
991 skb = (struct sk_buff *) dev_alloc_skb(totlen + 2);
992 if (skb != NULL) {
993 skb->dev = dev;
994 skb_reserve(skb, 2); /* 16 byte alignment */
995 skb_put(skb,totlen);
996 eth_copy_and_sum(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen,0);
997 skb->protocol = eth_type_trans(skb, dev);
998 netif_rx(skb);
999 dev->last_rx = jiffies;
1000 p->stats.rx_packets++;
1001 p->stats.rx_bytes += totlen;
1002 } else {
1003 p->stats.rx_dropped++;
1004 }
1005 } else {
1006 printk(KERN_WARNING "%s: received oversized frame.\n", dev->name);
1007 p->stats.rx_dropped++;
1008 }
1009 } else { /* frame !(ok), only with 'save-bad-frames' */
1010 printk(KERN_WARNING "%s: oops! rfd-error-status: %04x\n", dev->name, status);
1011 p->stats.rx_errors++;
1012 }
1013 p->rfd_top->status = 0;
1014 p->rfd_top->last = RFD_SUSP;
1015 p->rfd_last->last = 0; /* delete RU_SUSP */
1016 p->rfd_last = p->rfd_top;
1017 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
1018 }
1019}
1020
1021/**********************************************************
1022 * handle 'Receiver went not ready'.
1023 */
1024
1025static void elmc_rnr_int(struct net_device *dev)
1026{
1027 struct priv *p = (struct priv *) dev->priv;
1028
1029 p->stats.rx_errors++;
1030
1031 WAIT_4_SCB_CMD(); /* wait for the last cmd */
1032 p->scb->cmd = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
1033 elmc_attn586();
1034 WAIT_4_SCB_CMD(); /* wait for accept cmd. */
1035
1036 alloc_rfa(dev, (char *) p->rfd_first);
1037 startrecv586(dev); /* restart RU */
1038
1039 printk(KERN_WARNING "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status);
1040
1041}
1042
1043/**********************************************************
1044 * handle xmit - interrupt
1045 */
1046
1047static void elmc_xmt_int(struct net_device *dev)
1048{
1049 int status;
1050 struct priv *p = (struct priv *) dev->priv;
1051
1052 status = p->xmit_cmds[p->xmit_last]->cmd_status;
1053 if (!(status & STAT_COMPL)) {
1054 printk(KERN_WARNING "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1055 }
1056 if (status & STAT_OK) {
1057 p->stats.tx_packets++;
1058 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1059 } else {
1060 p->stats.tx_errors++;
1061 if (status & TCMD_LATECOLL) {
1062 printk(KERN_WARNING "%s: late collision detected.\n", dev->name);
1063 p->stats.collisions++;
1064 } else if (status & TCMD_NOCARRIER) {
1065 p->stats.tx_carrier_errors++;
1066 printk(KERN_WARNING "%s: no carrier detected.\n", dev->name);
1067 } else if (status & TCMD_LOSTCTS) {
1068 printk(KERN_WARNING "%s: loss of CTS detected.\n", dev->name);
1069 } else if (status & TCMD_UNDERRUN) {
1070 p->stats.tx_fifo_errors++;
1071 printk(KERN_WARNING "%s: DMA underrun detected.\n", dev->name);
1072 } else if (status & TCMD_MAXCOLL) {
1073 printk(KERN_WARNING "%s: Max. collisions exceeded.\n", dev->name);
1074 p->stats.collisions += 16;
1075 }
1076 }
1077
1078#if (NUM_XMIT_BUFFS != 1)
1079 if ((++p->xmit_last) == NUM_XMIT_BUFFS) {
1080 p->xmit_last = 0;
1081 }
1082#endif
1083
1084 netif_wake_queue(dev);
1085}
1086
1087/***********************************************************
1088 * (re)start the receiver
1089 */
1090
1091static void startrecv586(struct net_device *dev)
1092{
1093 struct priv *p = (struct priv *) dev->priv;
1094
1095 p->scb->rfa_offset = make16(p->rfd_first);
1096 p->scb->cmd = RUC_START;
1097 elmc_attn586(); /* start cmd. */
1098 WAIT_4_SCB_CMD(); /* wait for accept cmd. (no timeout!!) */
1099}
1100
1101/******************************************************
1102 * timeout
1103 */
1104
1105static void elmc_timeout(struct net_device *dev)
1106{
1107 struct priv *p = (struct priv *) dev->priv;
1108 /* COMMAND-UNIT active? */
1109 if (p->scb->status & CU_ACTIVE) {
1110#ifdef DEBUG
1111 printk("%s: strange ... timeout with CU active?!?\n", dev->name);
1112 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);
1113#endif
1114 p->scb->cmd = CUC_ABORT;
1115 elmc_attn586();
1116 WAIT_4_SCB_CMD();
1117 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
1118 p->scb->cmd = CUC_START;
1119 elmc_attn586();
1120 WAIT_4_SCB_CMD();
1121 netif_wake_queue(dev);
1122 } else {
1123#ifdef DEBUG
1124 printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev->name, p->scb->status);
1125 printk("%s: command-stats: %04x %04x\n", dev->name, p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status);
1126#endif
1127 elmc_close(dev);
1128 elmc_open(dev);
1129 }
1130}
1131
1132/******************************************************
1133 * send frame
1134 */
1135
1136static int elmc_send_packet(struct sk_buff *skb, struct net_device *dev)
1137{
1138 int len;
1139 int i;
1140#ifndef NO_NOPCOMMANDS
1141 int next_nop;
1142#endif
1143 struct priv *p = (struct priv *) dev->priv;
1144
1145 netif_stop_queue(dev);
1146
1147 len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
1148
1149 if (len != skb->len)
1150 memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
1151 memcpy((char *) p->xmit_cbuffs[p->xmit_count], (char *) (skb->data), skb->len);
1152
1153#if (NUM_XMIT_BUFFS == 1)
1154#ifdef NO_NOPCOMMANDS
1155 p->xmit_buffs[0]->size = TBD_LAST | len;
1156 for (i = 0; i < 16; i++) {
1157 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1158 p->scb->cmd = CUC_START;
1159 p->xmit_cmds[0]->cmd_status = 0;
1160 elmc_attn586();
1161 dev->trans_start = jiffies;
1162 if (!i) {
1163 dev_kfree_skb(skb);
1164 }
1165 WAIT_4_SCB_CMD();
1166 if ((p->scb->status & CU_ACTIVE)) { /* test it, because CU sometimes doesn't start immediately */
1167 break;
1168 }
1169 if (p->xmit_cmds[0]->cmd_status) {
1170 break;
1171 }
1172 if (i == 15) {
1173 printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1174 }
1175 }
1176#else
1177 next_nop = (p->nop_point + 1) & 0x1;
1178 p->xmit_buffs[0]->size = TBD_LAST | len;
1179
1180 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1181 = make16((p->nop_cmds[next_nop]));
1182 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1183
1184 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1185 dev->trans_start = jiffies;
1186 p->nop_point = next_nop;
1187 dev_kfree_skb(skb);
1188#endif
1189#else
1190 p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
1191 if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) {
1192 next_nop = 0;
1193 }
1194 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1195 p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1196 = make16((p->nop_cmds[next_nop]));
1197 p->nop_cmds[next_nop]->cmd_status = 0;
1198 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1199 dev->trans_start = jiffies;
1200 p->xmit_count = next_nop;
1201 if (p->xmit_count != p->xmit_last)
1202 netif_wake_queue(dev);
1203 dev_kfree_skb(skb);
1204#endif
1205 return 0;
1206}
1207
1208/*******************************************
1209 * Someone wanna have the statistics
1210 */
1211
1212static struct net_device_stats *elmc_get_stats(struct net_device *dev)
1213{
1214 struct priv *p = (struct priv *) dev->priv;
1215 unsigned short crc, aln, rsc, ovrn;
1216
1217 crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
1218 p->scb->crc_errs -= crc;
1219 aln = p->scb->aln_errs;
1220 p->scb->aln_errs -= aln;
1221 rsc = p->scb->rsc_errs;
1222 p->scb->rsc_errs -= rsc;
1223 ovrn = p->scb->ovrn_errs;
1224 p->scb->ovrn_errs -= ovrn;
1225
1226 p->stats.rx_crc_errors += crc;
1227 p->stats.rx_fifo_errors += ovrn;
1228 p->stats.rx_frame_errors += aln;
1229 p->stats.rx_dropped += rsc;
1230
1231 return &p->stats;
1232}
1233
1234/********************************************************
1235 * Set MC list ..
1236 */
1237
1238#ifdef ELMC_MULTICAST
1239static void set_multicast_list(struct net_device *dev)
1240{
1241 if (!dev->start) {
1242 /* without a running interface, promiscuous doesn't work */
1243 return;
1244 }
1245 dev->start = 0;
1246 alloc586(dev);
1247 init586(dev);
1248 startrecv586(dev);
1249 dev->start = 1;
1250}
1251#endif
1252
1253static void netdev_get_drvinfo(struct net_device *dev,
1254 struct ethtool_drvinfo *info)
1255{
1256 strcpy(info->driver, DRV_NAME);
1257 strcpy(info->version, DRV_VERSION);
1258 sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr);
1259}
1260
1261static struct ethtool_ops netdev_ethtool_ops = {
1262 .get_drvinfo = netdev_get_drvinfo,
1263};
1264
1265#ifdef MODULE
1266
1267/* Increase if needed ;) */
1268#define MAX_3C523_CARDS 4
1269
1270static struct net_device *dev_elmc[MAX_3C523_CARDS];
1271static int irq[MAX_3C523_CARDS];
1272static int io[MAX_3C523_CARDS];
1273module_param_array(irq, int, NULL, 0);
1274module_param_array(io, int, NULL, 0);
1275MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)");
1276MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)");
Randy Dunlap7b240172005-06-13 12:31:53 -07001277MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278
1279int 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) {
b1fc5502005-05-12 20:11:55 -04001291 dev_elmc[this_dev] = dev;
1292 found++;
1293 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 }
1295 free_netdev(dev);
1296 if (io[this_dev]==0)
1297 break;
1298 printk(KERN_WARNING "3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]);
1299 }
1300
1301 if(found==0) {
1302 if(io[0]==0) printk(KERN_NOTICE "3c523.c: No 3c523 cards found\n");
1303 return -ENXIO;
1304 } else return 0;
1305}
1306
1307void cleanup_module(void)
1308{
1309 int this_dev;
1310 for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1311 struct net_device *dev = dev_elmc[this_dev];
1312 if (dev) {
1313 unregister_netdev(dev);
1314 cleanup_card(dev);
1315 free_netdev(dev);
1316 }
1317 }
1318}
1319
1320#endif /* MODULE */