forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy path3c523.c
1321 lines (1108 loc) · 39 KB
/
3c523.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
net-3-driver for the 3c523 Etherlink/MC card (i82586 Ethernet chip)
This is an extension to the Linux operating system, and is covered by the
same GNU General Public License that covers that work.
Copyright 1995, 1996 by Chris Beauregard ([email protected])
This is basically Michael Hipp's ni52 driver, with a new probing
algorithm and some minor changes to the 82586 CA and reset routines.
Thanks a lot Michael for a really clean i82586 implementation! Unless
otherwise documented in ni52.c, any bugs are mine.
Contrary to the Ethernet-HOWTO, this isn't based on the 3c507 driver in
any way. The ni52 is a lot easier to modify.
sources:
ni52.c
Crynwr packet driver collection was a great reference for my first
attempt at this sucker. The 3c507 driver also helped, until I noticed
that ni52.c was a lot nicer.
EtherLink/MC: Micro Channel Ethernet Adapter Technical Reference
Manual, courtesy of 3Com CardFacts, documents the 3c523-specific
stuff. Information on CardFacts is found in the Ethernet HOWTO.
Also see <a href="http://www.3com.com/">
Microprocessor Communications Support Chips, T.J. Byers, ISBN
0-444-01224-9, has a section on the i82586. It tells you just enough
to know that you really don't want to learn how to program the chip.
The original device probe code was stolen from ps2esdi.c
Known Problems:
Since most of the code was stolen from ni52.c, you'll run across the
same bugs in the 0.62 version of ni52.c, plus maybe a few because of
the 3c523 idiosynchacies. The 3c523 has 16K of RAM though, so there
shouldn't be the overrun problem that the 8K ni52 has.
This driver is for a 16K adapter. It should work fine on the 64K
adapters, but it will only use one of the 4 banks of RAM. Modifying
this for the 64K version would require a lot of heinous bank
switching, which I'm sure not interested in doing. If you try to
implement a bank switching version, you'll basically have to remember
what bank is enabled and do a switch everytime you access a memory
location that's not current. You'll also have to remap pointers on
the driver side, because it only knows about 16K of the memory.
Anyone desperate or masochistic enough to try?
It seems to be stable now when multiple transmit buffers are used. I
can't see any performance difference, but then I'm working on a 386SX.
Multicast doesn't work. It doesn't even pretend to work. Don't use
it. Don't compile your kernel with multicast support. I don't know
why.
Features:
This driver is useable as a loadable module. If you try to specify an
IRQ or a IO address (via insmod 3c523.o irq=xx io=0xyyy), it will
search the MCA slots until it finds a 3c523 with the specified
parameters.
This driver does support multiple ethernet cards when used as a module
(up to MAX_3C523_CARDS, the default being 4)
This has been tested with both BNC and TP versions, internal and
external transceivers. Haven't tested with the 64K version (that I
know of).
History:
Jan 1st, 1996
first public release
Feb 4th, 1996
update to 1.3.59, incorporated multicast diffs from ni52.c
Feb 15th, 1996
added shared irq support
Apr 1999
added support for multiple cards when used as a module
added option to disable multicast as is causes problems
Ganesh Sittampalam <[email protected]>
Stuart Adamson <[email protected]>
Nov 2001
added support for ethtool (jgarzik)
$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 $
*/
#define DRV_NAME "3c523"
#define DRV_VERSION "17-Nov-2001"
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/mca-legacy.h>
#include <linux/ethtool.h>
#include <linux/bitops.h>
#include <linux/jiffies.h>
#include <asm/uaccess.h>
#include <asm/processor.h>
#include <asm/io.h>
#include "3c523.h"
/*************************************************************************/
#define DEBUG /* debug on */
#define SYSBUSVAL 0 /* 1 = 8 Bit, 0 = 16 bit - 3c523 only does 16 bit */
#undef ELMC_MULTICAST /* Disable multicast support as it is somewhat seriously broken at the moment */
#define make32(ptr16) (p->memtop + (short) (ptr16) )
#define make24(ptr32) ((char *) (ptr32) - p->base)
#define make16(ptr32) ((unsigned short) ((unsigned long) (ptr32) - (unsigned long) p->memtop ))
/*************************************************************************/
/*
Tables to which we can map values in the configuration registers.
*/
static int irq_table[] __initdata = {
12, 7, 3, 9
};
static int csr_table[] __initdata = {
0x300, 0x1300, 0x2300, 0x3300
};
static int shm_table[] __initdata = {
0x0c0000, 0x0c8000, 0x0d0000, 0x0d8000
};
/******************* how to calculate the buffers *****************************
* IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
* --------------- in a different (more stable?) mode. Only in this mode it's
* possible to configure the driver with 'NO_NOPCOMMANDS'
sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
sizeof(rfd) = 24; sizeof(rbd) = 12;
sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
sizeof(nop_cmd) = 8;
* if you don't know the driver, better do not change this values: */
#define RECV_BUFF_SIZE 1524 /* slightly oversized */
#define XMIT_BUFF_SIZE 1524 /* slightly oversized */
#define NUM_XMIT_BUFFS 1 /* config for both, 8K and 16K shmem */
#define NUM_RECV_BUFFS_8 4 /* config for 8K shared mem */
#define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
#if (NUM_XMIT_BUFFS == 1)
#define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
#endif
/**************************************************************************/
#define DELAY(x) { mdelay(32 * x); }
/* a much shorter delay: */
#define DELAY_16(); { udelay(16) ; }
/* wait for command with timeout: */
#define WAIT_4_SCB_CMD() { int i; \
for(i=0;i<1024;i++) { \
if(!p->scb->cmd) break; \
DELAY_16(); \
if(i == 1023) { \
printk(KERN_WARNING "%s:%d: scb_cmd timed out .. resetting i82586\n",\
dev->name,__LINE__); \
elmc_id_reset586(); } } }
static irqreturn_t elmc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr);
static int elmc_open(struct net_device *dev);
static int elmc_close(struct net_device *dev);
static int elmc_send_packet(struct sk_buff *, struct net_device *);
static struct net_device_stats *elmc_get_stats(struct net_device *dev);
static void elmc_timeout(struct net_device *dev);
#ifdef ELMC_MULTICAST
static void set_multicast_list(struct net_device *dev);
#endif
static struct ethtool_ops netdev_ethtool_ops;
/* helper-functions */
static int init586(struct net_device *dev);
static int check586(struct net_device *dev, unsigned long where, unsigned size);
static void alloc586(struct net_device *dev);
static void startrecv586(struct net_device *dev);
static void *alloc_rfa(struct net_device *dev, void *ptr);
static void elmc_rcv_int(struct net_device *dev);
static void elmc_xmt_int(struct net_device *dev);
static void elmc_rnr_int(struct net_device *dev);
struct priv {
struct net_device_stats stats;
unsigned long base;
char *memtop;
unsigned long mapped_start; /* Start of ioremap */
volatile struct rfd_struct *rfd_last, *rfd_top, *rfd_first;
volatile struct scp_struct *scp; /* volatile is important */
volatile struct iscp_struct *iscp; /* volatile is important */
volatile struct scb_struct *scb; /* volatile is important */
volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
#if (NUM_XMIT_BUFFS == 1)
volatile struct transmit_cmd_struct *xmit_cmds[2];
volatile struct nop_cmd_struct *nop_cmds[2];
#else
volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
#endif
volatile int nop_point, num_recv_buffs;
volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
volatile int xmit_count, xmit_last;
volatile int slot;
};
#define elmc_attn586() {elmc_do_attn586(dev->base_addr,ELMC_CTRL_INTE);}
#define elmc_reset586() {elmc_do_reset586(dev->base_addr,ELMC_CTRL_INTE);}
/* with interrupts disabled - this will clear the interrupt bit in the
3c523 control register, and won't put it back. This effectively
disables interrupts on the card. */
#define elmc_id_attn586() {elmc_do_attn586(dev->base_addr,0);}
#define elmc_id_reset586() {elmc_do_reset586(dev->base_addr,0);}
/*************************************************************************/
/*
Do a Channel Attention on the 3c523. This is extremely board dependent.
*/
static void elmc_do_attn586(int ioaddr, int ints)
{
/* the 3c523 requires a minimum of 500 ns. The delays here might be
a little too large, and hence they may cut the performance of the
card slightly. If someone who knows a little more about Linux
timing would care to play with these, I'd appreciate it. */
/* this bit masking stuff is crap. I'd rather have separate
registers with strobe triggers for each of these functions. <sigh>
Ya take what ya got. */
outb(ELMC_CTRL_RST | 0x3 | ELMC_CTRL_CA | ints, ioaddr + ELMC_CTRL);
DELAY_16(); /* > 500 ns */
outb(ELMC_CTRL_RST | 0x3 | ints, ioaddr + ELMC_CTRL);
}
/*************************************************************************/
/*
Reset the 82586 on the 3c523. Also very board dependent.
*/
static void elmc_do_reset586(int ioaddr, int ints)
{
/* toggle the RST bit low then high */
outb(0x3 | ELMC_CTRL_LBK, ioaddr + ELMC_CTRL);
DELAY_16(); /* > 500 ns */
outb(ELMC_CTRL_RST | ELMC_CTRL_LBK | 0x3, ioaddr + ELMC_CTRL);
elmc_do_attn586(ioaddr, ints);
}
/**********************************************
* close device
*/
static int elmc_close(struct net_device *dev)
{
netif_stop_queue(dev);
elmc_id_reset586(); /* the hard way to stop the receiver */
free_irq(dev->irq, dev);
return 0;
}
/**********************************************
* open device
*/
static int elmc_open(struct net_device *dev)
{
int ret;
elmc_id_attn586(); /* disable interrupts */
ret = request_irq(dev->irq, &elmc_interrupt, SA_SHIRQ | SA_SAMPLE_RANDOM,
dev->name, dev);
if (ret) {
printk(KERN_ERR "%s: couldn't get irq %d\n", dev->name, dev->irq);
elmc_id_reset586();
return ret;
}
alloc586(dev);
init586(dev);
startrecv586(dev);
netif_start_queue(dev);
return 0; /* most done by init */
}
/**********************************************
* Check to see if there's an 82586 out there.
*/
static int __init check586(struct net_device *dev, unsigned long where, unsigned size)
{
struct priv *p = (struct priv *) dev->priv;
char *iscp_addrs[2];
int i = 0;
p->base = (unsigned long) isa_bus_to_virt((unsigned long)where) + size - 0x01000000;
p->memtop = isa_bus_to_virt((unsigned long)where) + size;
p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
memset((char *) p->scp, 0, sizeof(struct scp_struct));
p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */
iscp_addrs[0] = isa_bus_to_virt((unsigned long)where);
iscp_addrs[1] = (char *) p->scp - sizeof(struct iscp_struct);
for (i = 0; i < 2; i++) {
p->iscp = (struct iscp_struct *) iscp_addrs[i];
memset((char *) p->iscp, 0, sizeof(struct iscp_struct));
p->scp->iscp = make24(p->iscp);
p->iscp->busy = 1;
elmc_id_reset586();
/* reset586 does an implicit CA */
/* apparently, you sometimes have to kick the 82586 twice... */
elmc_id_attn586();
DELAY(1);
if (p->iscp->busy) { /* i82586 clears 'busy' after successful init */
return 0;
}
}
return 1;
}
/******************************************************************
* set iscp at the right place, called by elmc_probe and open586.
*/
void alloc586(struct net_device *dev)
{
struct priv *p = (struct priv *) dev->priv;
elmc_id_reset586();
DELAY(2);
p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
p->scb = (struct scb_struct *) isa_bus_to_virt(dev->mem_start);
p->iscp = (struct iscp_struct *) ((char *) p->scp - sizeof(struct iscp_struct));
memset((char *) p->iscp, 0, sizeof(struct iscp_struct));
memset((char *) p->scp, 0, sizeof(struct scp_struct));
p->scp->iscp = make24(p->iscp);
p->scp->sysbus = SYSBUSVAL;
p->iscp->scb_offset = make16(p->scb);
p->iscp->busy = 1;
elmc_id_reset586();
elmc_id_attn586();
DELAY(2);
if (p->iscp->busy) {
printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
}
memset((char *) p->scb, 0, sizeof(struct scb_struct));
}
/*****************************************************************/
static int elmc_getinfo(char *buf, int slot, void *d)
{
int len = 0;
struct net_device *dev = (struct net_device *) d;
int i;
if (dev == NULL)
return len;
len += sprintf(buf + len, "Revision: 0x%x\n",
inb(dev->base_addr + ELMC_REVISION) & 0xf);
len += sprintf(buf + len, "IRQ: %d\n", dev->irq);
len += sprintf(buf + len, "IO Address: %#lx-%#lx\n", dev->base_addr,
dev->base_addr + ELMC_IO_EXTENT);
len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start,
dev->mem_end - 1);
len += sprintf(buf + len, "Transceiver: %s\n", dev->if_port ?
"External" : "Internal");
len += sprintf(buf + len, "Device: %s\n", dev->name);
len += sprintf(buf + len, "Hardware Address:");
for (i = 0; i < 6; i++) {
len += sprintf(buf + len, " %02x", dev->dev_addr[i]);
}
buf[len++] = '\n';
buf[len] = 0;
return len;
} /* elmc_getinfo() */
/*****************************************************************/
static int __init do_elmc_probe(struct net_device *dev)
{
static int slot;
int base_addr = dev->base_addr;
int irq = dev->irq;
u_char status = 0;
u_char revision = 0;
int i = 0;
unsigned int size = 0;
int retval;
struct priv *pr = dev->priv;
SET_MODULE_OWNER(dev);
if (MCA_bus == 0) {
return -ENODEV;
}
/* search through the slots for the 3c523. */
slot = mca_find_adapter(ELMC_MCA_ID, 0);
while (slot != -1) {
status = mca_read_stored_pos(slot, 2);
dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6];
dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1];
/*
If we're trying to match a specified irq or IO address,
we'll reject a match unless it's what we're looking for.
Also reject it if the card is already in use.
*/
if ((irq && irq != dev->irq) ||
(base_addr && base_addr != dev->base_addr)) {
slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
continue;
}
if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) {
slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
continue;
}
/* found what we're looking for... */
break;
}
/* we didn't find any 3c523 in the slots we checked for */
if (slot == MCA_NOTFOUND)
return ((base_addr || irq) ? -ENXIO : -ENODEV);
mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC");
mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev);
/* if we get this far, adapter has been found - carry on */
printk(KERN_INFO "%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1);
/* Now we extract configuration info from the card.
The 3c523 provides information in two of the POS registers, but
the second one is only needed if we want to tell the card what IRQ
to use. I suspect that whoever sets the thing up initially would
prefer we don't screw with those things.
Note that we read the status info when we found the card...
See 3c523.h for more details.
*/
/* revision is stored in the first 4 bits of the revision register */
revision = inb(dev->base_addr + ELMC_REVISION) & 0xf;
/* according to docs, we read the interrupt and write it back to
the IRQ select register, since the POST might not configure the IRQ
properly. */
switch (dev->irq) {
case 3:
mca_write_pos(slot, 3, 0x04);
break;
case 7:
mca_write_pos(slot, 3, 0x02);
break;
case 9:
mca_write_pos(slot, 3, 0x08);
break;
case 12:
mca_write_pos(slot, 3, 0x01);
break;
}
memset(pr, 0, sizeof(struct priv));
pr->slot = slot;
printk(KERN_INFO "%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision,
dev->base_addr);
/* Determine if we're using the on-board transceiver (i.e. coax) or
an external one. The information is pretty much useless, but I
guess it's worth brownie points. */
dev->if_port = (status & ELMC_STATUS_DISABLE_THIN);
/* The 3c523 has a 24K chunk of memory. The first 16K is the
shared memory, while the last 8K is for the EtherStart BIOS ROM.
Which we don't care much about here. We'll just tell Linux that
we're using 16K. MCA won't permit address space conflicts caused
by not mapping the other 8K. */
dev->mem_start = shm_table[(status & ELMC_STATUS_MEMORY_SELECT) >> 3];
/* We're using MCA, so it's a given that the information about memory
size is correct. The Crynwr drivers do something like this. */
elmc_id_reset586(); /* seems like a good idea before checking it... */
size = 0x4000; /* check for 16K mem */
if (!check586(dev, dev->mem_start, size)) {
printk(KERN_ERR "%s: memprobe, Can't find memory at 0x%lx!\n", dev->name,
dev->mem_start);
retval = -ENODEV;
goto err_out;
}
dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */
pr->memtop = isa_bus_to_virt(dev->mem_start) + size;
pr->base = (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
alloc586(dev);
elmc_id_reset586(); /* make sure it doesn't generate spurious ints */
/* set number of receive-buffs according to memsize */
pr->num_recv_buffs = NUM_RECV_BUFFS_16;
/* dump all the assorted information */
printk(KERN_INFO "%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name,
dev->irq, dev->if_port ? "ex" : "in",
dev->mem_start, dev->mem_end - 1);
/* The hardware address for the 3c523 is stored in the first six
bytes of the IO address. */
printk(KERN_INFO "%s: hardware address ", dev->name);
for (i = 0; i < 6; i++) {
dev->dev_addr[i] = inb(dev->base_addr + i);
printk(" %02x", dev->dev_addr[i]);
}
printk("\n");
dev->open = &elmc_open;
dev->stop = &elmc_close;
dev->get_stats = &elmc_get_stats;
dev->hard_start_xmit = &elmc_send_packet;
dev->tx_timeout = &elmc_timeout;
dev->watchdog_timeo = HZ;
#ifdef ELMC_MULTICAST
dev->set_multicast_list = &set_multicast_list;
#else
dev->set_multicast_list = NULL;
#endif
dev->ethtool_ops = &netdev_ethtool_ops;
/* note that we haven't actually requested the IRQ from the kernel.
That gets done in elmc_open(). I'm not sure that's such a good idea,
but it works, so I'll go with it. */
#ifndef ELMC_MULTICAST
dev->flags&=~IFF_MULTICAST; /* Multicast doesn't work */
#endif
retval = register_netdev(dev);
if (retval)
goto err_out;
return 0;
err_out:
mca_set_adapter_procfn(slot, NULL, NULL);
release_region(dev->base_addr, ELMC_IO_EXTENT);
return retval;
}
static void cleanup_card(struct net_device *dev)
{
mca_set_adapter_procfn(((struct priv *) (dev->priv))->slot, NULL, NULL);
release_region(dev->base_addr, ELMC_IO_EXTENT);
}
#ifndef MODULE
struct net_device * __init elmc_probe(int unit)
{
struct net_device *dev = alloc_etherdev(sizeof(struct priv));
int err;
if (!dev)
return ERR_PTR(-ENOMEM);
sprintf(dev->name, "eth%d", unit);
netdev_boot_setup_check(dev);
err = do_elmc_probe(dev);
if (err)
goto out;
return dev;
out:
free_netdev(dev);
return ERR_PTR(err);
}
#endif
/**********************************************
* init the chip (elmc-interrupt should be disabled?!)
* needs a correct 'allocated' memory
*/
static int init586(struct net_device *dev)
{
void *ptr;
unsigned long s;
int i, result = 0;
struct priv *p = (struct priv *) dev->priv;
volatile struct configure_cmd_struct *cfg_cmd;
volatile struct iasetup_cmd_struct *ias_cmd;
volatile struct tdr_cmd_struct *tdr_cmd;
volatile struct mcsetup_cmd_struct *mc_cmd;
struct dev_mc_list *dmi = dev->mc_list;
int num_addrs = dev->mc_count;
ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct));
cfg_cmd = (struct configure_cmd_struct *) ptr; /* configure-command */
cfg_cmd->cmd_status = 0;
cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST;
cfg_cmd->cmd_link = 0xffff;
cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
cfg_cmd->fifo = 0x08; /* fifo-limit (8=tx:32/rx:64) */
cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
cfg_cmd->priority = 0x00;
cfg_cmd->ifs = 0x60;
cfg_cmd->time_low = 0x00;
cfg_cmd->time_high = 0xf2;
cfg_cmd->promisc = 0;
if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC)) {
cfg_cmd->promisc = 1;
dev->flags |= IFF_PROMISC;
}
cfg_cmd->carr_coll = 0x00;
p->scb->cbl_offset = make16(cfg_cmd);
p->scb->cmd = CUC_START; /* cmd.-unit start */
elmc_id_attn586();
s = jiffies; /* warning: only active with interrupts on !! */
while (!(cfg_cmd->cmd_status & STAT_COMPL)) {
if (time_after(jiffies, s + 30*HZ/100))
break;
}
if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) {
printk(KERN_WARNING "%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status);
return 1;
}
/*
* individual address setup
*/
ias_cmd = (struct iasetup_cmd_struct *) ptr;
ias_cmd->cmd_status = 0;
ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST;
ias_cmd->cmd_link = 0xffff;
memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN);
p->scb->cbl_offset = make16(ias_cmd);
p->scb->cmd = CUC_START; /* cmd.-unit start */
elmc_id_attn586();
s = jiffies;
while (!(ias_cmd->cmd_status & STAT_COMPL)) {
if (time_after(jiffies, s + 30*HZ/100))
break;
}
if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) {
printk(KERN_WARNING "%s (elmc): individual address setup command failed: %04x\n", dev->name, ias_cmd->cmd_status);
return 1;
}
/*
* TDR, wire check .. e.g. no resistor e.t.c
*/
tdr_cmd = (struct tdr_cmd_struct *) ptr;
tdr_cmd->cmd_status = 0;
tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST;
tdr_cmd->cmd_link = 0xffff;
tdr_cmd->status = 0;
p->scb->cbl_offset = make16(tdr_cmd);
p->scb->cmd = CUC_START; /* cmd.-unit start */
elmc_attn586();
s = jiffies;
while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
if (time_after(jiffies, s + 30*HZ/100)) {
printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
result = 1;
break;
}
}
if (!result) {
DELAY(2); /* wait for result */
result = tdr_cmd->status;
p->scb->cmd = p->scb->status & STAT_MASK;
elmc_id_attn586(); /* ack the interrupts */
if (result & TDR_LNK_OK) {
/* empty */
} else if (result & TDR_XCVR_PRB) {
printk(KERN_WARNING "%s: TDR: Transceiver problem!\n", dev->name);
} else if (result & TDR_ET_OPN) {
printk(KERN_WARNING "%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
} else if (result & TDR_ET_SRT) {
if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
printk(KERN_WARNING "%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
} else {
printk(KERN_WARNING "%s: TDR: Unknown status %04x\n", dev->name, result);
}
}
/*
* ack interrupts
*/
p->scb->cmd = p->scb->status & STAT_MASK;
elmc_id_attn586();
/*
* alloc nop/xmit-cmds
*/
#if (NUM_XMIT_BUFFS == 1)
for (i = 0; i < 2; i++) {
p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
p->nop_cmds[i]->cmd_cmd = CMD_NOP;
p->nop_cmds[i]->cmd_status = 0;
p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
}
p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr; /* transmit cmd/buff 0 */
ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
#else
for (i = 0; i < NUM_XMIT_BUFFS; i++) {
p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
p->nop_cmds[i]->cmd_cmd = CMD_NOP;
p->nop_cmds[i]->cmd_status = 0;
p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr; /*transmit cmd/buff 0 */
ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
}
#endif
ptr = alloc_rfa(dev, (void *) ptr); /* init receive-frame-area */
/*
* Multicast setup
*/
if (dev->mc_count) {
/* I don't understand this: do we really need memory after the init? */
int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
if (len <= 0) {
printk(KERN_ERR "%s: Ooooops, no memory for MC-Setup!\n", dev->name);
} else {
if (len < num_addrs) {
num_addrs = len;
printk(KERN_WARNING "%s: Sorry, can only apply %d MC-Address(es).\n",
dev->name, num_addrs);
}
mc_cmd = (struct mcsetup_cmd_struct *) ptr;
mc_cmd->cmd_status = 0;
mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
mc_cmd->cmd_link = 0xffff;
mc_cmd->mc_cnt = num_addrs * 6;
for (i = 0; i < num_addrs; i++) {
memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr, 6);
dmi = dmi->next;
}
p->scb->cbl_offset = make16(mc_cmd);
p->scb->cmd = CUC_START;
elmc_id_attn586();
s = jiffies;
while (!(mc_cmd->cmd_status & STAT_COMPL)) {
if (time_after(jiffies, s + 30*HZ/100))
break;
}
if (!(mc_cmd->cmd_status & STAT_COMPL)) {
printk(KERN_WARNING "%s: Can't apply multicast-address-list.\n", dev->name);
}
}
}
/*
* alloc xmit-buffs / init xmit_cmds
*/
for (i = 0; i < NUM_XMIT_BUFFS; i++) {
p->xmit_cbuffs[i] = (char *) ptr; /* char-buffs */
ptr = (char *) ptr + XMIT_BUFF_SIZE;
p->xmit_buffs[i] = (struct tbd_struct *) ptr; /* TBD */
ptr = (char *) ptr + sizeof(struct tbd_struct);
if ((void *) ptr > (void *) p->iscp) {
printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", dev->name);
return 1;
}
memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct));
memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct));
p->xmit_cmds[i]->cmd_status = STAT_COMPL;
p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
p->xmit_buffs[i]->next = 0xffff;
p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
}
p->xmit_count = 0;
p->xmit_last = 0;
#ifndef NO_NOPCOMMANDS
p->nop_point = 0;
#endif
/*
* 'start transmitter' (nop-loop)
*/
#ifndef NO_NOPCOMMANDS
p->scb->cbl_offset = make16(p->nop_cmds[0]);
p->scb->cmd = CUC_START;
elmc_id_attn586();
WAIT_4_SCB_CMD();
#else
p->xmit_cmds[0]->cmd_link = 0xffff;
p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT;
#endif
return 0;
}
/******************************************************
* This is a helper routine for elmc_rnr_int() and init586().
* It sets up the Receive Frame Area (RFA).
*/
static void *alloc_rfa(struct net_device *dev, void *ptr)
{
volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr;
volatile struct rbd_struct *rbd;
int i;
struct priv *p = (struct priv *) dev->priv;
memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs);
p->rfd_first = rfd;
for (i = 0; i < p->num_recv_buffs; i++) {
rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs);
}
rfd[p->num_recv_buffs - 1].last = RFD_SUSP; /* RU suspend */
ptr = (void *) (rfd + p->num_recv_buffs);
rbd = (struct rbd_struct *) ptr;
ptr = (void *) (rbd + p->num_recv_buffs);
/* clr descriptors */
memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs);
for (i = 0; i < p->num_recv_buffs; i++) {
rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs));
rbd[i].size = RECV_BUFF_SIZE;
rbd[i].buffer = make24(ptr);
ptr = (char *) ptr + RECV_BUFF_SIZE;
}
p->rfd_top = p->rfd_first;
p->rfd_last = p->rfd_first + p->num_recv_buffs - 1;
p->scb->rfa_offset = make16(p->rfd_first);
p->rfd_first->rbd_offset = make16(rbd);
return ptr;
}
/**************************************************
* Interrupt Handler ...
*/
static irqreturn_t
elmc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr)
{
struct net_device *dev = (struct net_device *) dev_id;
unsigned short stat;
struct priv *p;
if (dev == NULL) {
printk(KERN_ERR "elmc-interrupt: irq %d for unknown device.\n", (int) -(((struct pt_regs *) reg_ptr)->orig_eax + 2));
return IRQ_NONE;
} else if (!netif_running(dev)) {
/* The 3c523 has this habit of generating interrupts during the
reset. I'm not sure if the ni52 has this same problem, but it's
really annoying if we haven't finished initializing it. I was
hoping all the elmc_id_* commands would disable this, but I
might have missed a few. */
elmc_id_attn586(); /* ack inter. and disable any more */
return IRQ_HANDLED;
} else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) {
/* wasn't this device */
return IRQ_NONE;
}
/* reading ELMC_CTRL also clears the INT bit. */
p = (struct priv *) dev->priv;
while ((stat = p->scb->status & STAT_MASK))
{
p->scb->cmd = stat;
elmc_attn586(); /* ack inter. */
if (stat & STAT_CX) {
/* command with I-bit set complete */
elmc_xmt_int(dev);
}
if (stat & STAT_FR) {
/* received a frame */
elmc_rcv_int(dev);
}
#ifndef NO_NOPCOMMANDS
if (stat & STAT_CNA) {
/* CU went 'not ready' */
if (netif_running(dev)) {
printk(KERN_WARNING "%s: oops! CU has left active state. stat: %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
}
}
#endif
if (stat & STAT_RNR) {
/* RU went 'not ready' */
if (p->scb->status & RU_SUSPEND) {
/* special case: RU_SUSPEND */
WAIT_4_SCB_CMD();
p->scb->cmd = RUC_RESUME;
elmc_attn586();
} else {
printk(KERN_WARNING "%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
elmc_rnr_int(dev);
}
}
WAIT_4_SCB_CMD(); /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
if (p->scb->cmd) { /* timed out? */
break;
}
}
return IRQ_HANDLED;
}
/*******************************************************
* receive-interrupt
*/
static void elmc_rcv_int(struct net_device *dev)
{
int status;
unsigned short totlen;
struct sk_buff *skb;
struct rbd_struct *rbd;
struct priv *p = (struct priv *) dev->priv;
for (; (status = p->rfd_top->status) & STAT_COMPL;) {
rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
if (status & STAT_OK) { /* frame received without error? */
if ((totlen = rbd->status) & RBD_LAST) { /* the first and the last buffer? */
totlen &= RBD_MASK; /* length of this frame */
rbd->status = 0;
skb = (struct sk_buff *) dev_alloc_skb(totlen + 2);
if (skb != NULL) {
skb->dev = dev;
skb_reserve(skb, 2); /* 16 byte alignment */
skb_put(skb,totlen);
eth_copy_and_sum(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen,0);
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
dev->last_rx = jiffies;