/
axnet_cs.c
1725 lines (1447 loc) · 50.9 KB
/
axnet_cs.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
/*======================================================================
A PCMCIA ethernet driver for Asix AX88190-based cards
The Asix AX88190 is a NS8390-derived chipset with a few nasty
idiosyncracies that make it very inconvenient to support with a
standard 8390 driver. This driver is based on pcnet_cs, with the
tweaked 8390 code grafted on the end. Much of what I did was to
clean up and update a similar driver supplied by Asix, which was
adapted by William Lee, william@asix.com.tw.
Copyright (C) 2001 David A. Hinds -- dahinds@users.sourceforge.net
axnet_cs.c 1.28 2002/06/29 06:27:37
The network driver code is based on Donald Becker's NE2000 code:
Written 1992,1993 by Donald Becker.
Copyright 1993 United States Government as represented by the
Director, National Security Agency. This software may be used and
distributed according to the terms of the GNU General Public License,
incorporated herein by reference.
Donald Becker may be reached at becker@scyld.com
======================================================================*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/ptrace.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/crc32.h>
#include <linux/mii.h>
#include "../8390.h"
#include <pcmcia/cistpl.h>
#include <pcmcia/ciscode.h>
#include <pcmcia/ds.h>
#include <pcmcia/cisreg.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/byteorder.h>
#include <asm/uaccess.h>
#define AXNET_CMD 0x00
#define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */
#define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */
#define AXNET_MII_EEP 0x14 /* Offset of MII access port */
#define AXNET_TEST 0x15 /* Offset of TEST Register port */
#define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */
#define AXNET_START_PG 0x40 /* First page of TX buffer */
#define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */
#define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */
#define IS_AX88190 0x0001
#define IS_AX88790 0x0002
/*====================================================================*/
/* Module parameters */
MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
MODULE_LICENSE("GPL");
/*====================================================================*/
static int axnet_config(struct pcmcia_device *link);
static void axnet_release(struct pcmcia_device *link);
static int axnet_open(struct net_device *dev);
static int axnet_close(struct net_device *dev);
static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
struct net_device *dev);
static struct net_device_stats *get_stats(struct net_device *dev);
static void set_multicast_list(struct net_device *dev);
static void axnet_tx_timeout(struct net_device *dev);
static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
static void ei_watchdog(u_long arg);
static void axnet_reset_8390(struct net_device *dev);
static int mdio_read(unsigned int addr, int phy_id, int loc);
static void mdio_write(unsigned int addr, int phy_id, int loc, int value);
static void get_8390_hdr(struct net_device *,
struct e8390_pkt_hdr *, int);
static void block_input(struct net_device *dev, int count,
struct sk_buff *skb, int ring_offset);
static void block_output(struct net_device *dev, int count,
const u_char *buf, const int start_page);
static void axnet_detach(struct pcmcia_device *p_dev);
static void AX88190_init(struct net_device *dev, int startp);
static int ax_open(struct net_device *dev);
static int ax_close(struct net_device *dev);
static irqreturn_t ax_interrupt(int irq, void *dev_id);
/*====================================================================*/
typedef struct axnet_dev_t {
struct pcmcia_device *p_dev;
caddr_t base;
struct timer_list watchdog;
int stale, fast_poll;
u_short link_status;
u_char duplex_flag;
int phy_id;
int flags;
int active_low;
} axnet_dev_t;
static inline axnet_dev_t *PRIV(struct net_device *dev)
{
void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
return p;
}
static const struct net_device_ops axnet_netdev_ops = {
.ndo_open = axnet_open,
.ndo_stop = axnet_close,
.ndo_do_ioctl = axnet_ioctl,
.ndo_start_xmit = axnet_start_xmit,
.ndo_tx_timeout = axnet_tx_timeout,
.ndo_get_stats = get_stats,
.ndo_set_multicast_list = set_multicast_list,
.ndo_change_mtu = eth_change_mtu,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
};
static int axnet_probe(struct pcmcia_device *link)
{
axnet_dev_t *info;
struct net_device *dev;
struct ei_device *ei_local;
dev_dbg(&link->dev, "axnet_attach()\n");
dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(axnet_dev_t));
if (!dev)
return -ENOMEM;
ei_local = netdev_priv(dev);
spin_lock_init(&ei_local->page_lock);
info = PRIV(dev);
info->p_dev = link;
link->priv = dev;
link->config_flags |= CONF_ENABLE_IRQ;
dev->netdev_ops = &axnet_netdev_ops;
dev->watchdog_timeo = TX_TIMEOUT;
return axnet_config(link);
} /* axnet_attach */
static void axnet_detach(struct pcmcia_device *link)
{
struct net_device *dev = link->priv;
dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link);
unregister_netdev(dev);
axnet_release(link);
free_netdev(dev);
} /* axnet_detach */
/*======================================================================
This probes for a card's hardware address by reading the PROM.
======================================================================*/
static int get_prom(struct pcmcia_device *link)
{
struct net_device *dev = link->priv;
unsigned int ioaddr = dev->base_addr;
int i, j;
/* This is based on drivers/net/ne.c */
struct {
u_char value, offset;
} program_seq[] = {
{E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
{0x01, EN0_DCFG}, /* Set word-wide access. */
{0x00, EN0_RCNTLO}, /* Clear the count regs. */
{0x00, EN0_RCNTHI},
{0x00, EN0_IMR}, /* Mask completion irq. */
{0xFF, EN0_ISR},
{E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */
{E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
{0x10, EN0_RCNTLO},
{0x00, EN0_RCNTHI},
{0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */
{0x04, EN0_RSARHI},
{E8390_RREAD+E8390_START, E8390_CMD},
};
/* Not much of a test, but the alternatives are messy */
if (link->config_base != 0x03c0)
return 0;
axnet_reset_8390(dev);
mdelay(10);
for (i = 0; i < ARRAY_SIZE(program_seq); i++)
outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
for (i = 0; i < 6; i += 2) {
j = inw(ioaddr + AXNET_DATAPORT);
dev->dev_addr[i] = j & 0xff;
dev->dev_addr[i+1] = j >> 8;
}
return 1;
} /* get_prom */
static int try_io_port(struct pcmcia_device *link)
{
int j, ret;
link->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
link->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
if (link->resource[0]->end == 32) {
link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
/* for master/slave multifunction cards */
if (link->resource[1]->end > 0)
link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
} else {
/* This should be two 16-port windows */
link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
link->resource[1]->flags |= IO_DATA_PATH_WIDTH_16;
}
if (link->resource[0]->start == 0) {
for (j = 0; j < 0x400; j += 0x20) {
link->resource[0]->start = j ^ 0x300;
link->resource[1]->start = (j ^ 0x300) + 0x10;
link->io_lines = 16;
ret = pcmcia_request_io(link);
if (ret == 0)
return ret;
}
return ret;
} else {
return pcmcia_request_io(link);
}
}
static int axnet_configcheck(struct pcmcia_device *p_dev, void *priv_data)
{
if (p_dev->config_index == 0)
return -EINVAL;
p_dev->config_index = 0x05;
if (p_dev->resource[0]->end + p_dev->resource[1]->end < 32)
return -ENODEV;
return try_io_port(p_dev);
}
static int axnet_config(struct pcmcia_device *link)
{
struct net_device *dev = link->priv;
axnet_dev_t *info = PRIV(dev);
int i, j, j2, ret;
dev_dbg(&link->dev, "axnet_config(0x%p)\n", link);
/* don't trust the CIS on this; Linksys got it wrong */
link->config_regs = 0x63;
link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
ret = pcmcia_loop_config(link, axnet_configcheck, NULL);
if (ret != 0)
goto failed;
if (!link->irq)
goto failed;
if (resource_size(link->resource[1]) == 8)
link->config_flags |= CONF_ENABLE_SPKR;
ret = pcmcia_enable_device(link);
if (ret)
goto failed;
dev->irq = link->irq;
dev->base_addr = link->resource[0]->start;
if (!get_prom(link)) {
pr_notice("this is not an AX88190 card!\n");
pr_notice("use pcnet_cs instead.\n");
goto failed;
}
ei_status.name = "AX88190";
ei_status.word16 = 1;
ei_status.tx_start_page = AXNET_START_PG;
ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
ei_status.stop_page = AXNET_STOP_PG;
ei_status.reset_8390 = axnet_reset_8390;
ei_status.get_8390_hdr = get_8390_hdr;
ei_status.block_input = block_input;
ei_status.block_output = block_output;
if (inb(dev->base_addr + AXNET_TEST) != 0)
info->flags |= IS_AX88790;
else
info->flags |= IS_AX88190;
if (info->flags & IS_AX88790)
outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */
info->active_low = 0;
for (i = 0; i < 32; i++) {
j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
if (j == j2) continue;
if ((j != 0) && (j != 0xffff)) break;
}
if (i == 32) {
/* Maybe PHY is in power down mode. (PPD_SET = 1)
Bit 2 of CCSR is active low. */
pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
for (i = 0; i < 32; i++) {
j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
if (j == j2) continue;
if ((j != 0) && (j != 0xffff)) {
info->active_low = 1;
break;
}
}
}
info->phy_id = (i < 32) ? i : -1;
SET_NETDEV_DEV(dev, &link->dev);
if (register_netdev(dev) != 0) {
pr_notice("register_netdev() failed\n");
goto failed;
}
netdev_info(dev, "Asix AX88%d90: io %#3lx, irq %d, hw_addr %pM\n",
((info->flags & IS_AX88790) ? 7 : 1),
dev->base_addr, dev->irq, dev->dev_addr);
if (info->phy_id != -1) {
netdev_dbg(dev, " MII transceiver at index %d, status %x\n",
info->phy_id, j);
} else {
netdev_notice(dev, " No MII transceivers found!\n");
}
return 0;
failed:
axnet_release(link);
return -ENODEV;
} /* axnet_config */
static void axnet_release(struct pcmcia_device *link)
{
pcmcia_disable_device(link);
}
static int axnet_suspend(struct pcmcia_device *link)
{
struct net_device *dev = link->priv;
if (link->open)
netif_device_detach(dev);
return 0;
}
static int axnet_resume(struct pcmcia_device *link)
{
struct net_device *dev = link->priv;
axnet_dev_t *info = PRIV(dev);
if (link->open) {
if (info->active_low == 1)
pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
axnet_reset_8390(dev);
AX88190_init(dev, 1);
netif_device_attach(dev);
}
return 0;
}
/*======================================================================
MII interface support
======================================================================*/
#define MDIO_SHIFT_CLK 0x01
#define MDIO_DATA_WRITE0 0x00
#define MDIO_DATA_WRITE1 0x08
#define MDIO_DATA_READ 0x04
#define MDIO_MASK 0x0f
#define MDIO_ENB_IN 0x02
static void mdio_sync(unsigned int addr)
{
int bits;
for (bits = 0; bits < 32; bits++) {
outb_p(MDIO_DATA_WRITE1, addr);
outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
}
}
static int mdio_read(unsigned int addr, int phy_id, int loc)
{
u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
int i, retval = 0;
mdio_sync(addr);
for (i = 14; i >= 0; i--) {
int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
outb_p(dat, addr);
outb_p(dat | MDIO_SHIFT_CLK, addr);
}
for (i = 19; i > 0; i--) {
outb_p(MDIO_ENB_IN, addr);
retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
}
return (retval>>1) & 0xffff;
}
static void mdio_write(unsigned int addr, int phy_id, int loc, int value)
{
u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
int i;
mdio_sync(addr);
for (i = 31; i >= 0; i--) {
int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
outb_p(dat, addr);
outb_p(dat | MDIO_SHIFT_CLK, addr);
}
for (i = 1; i >= 0; i--) {
outb_p(MDIO_ENB_IN, addr);
outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
}
}
/*====================================================================*/
static int axnet_open(struct net_device *dev)
{
int ret;
axnet_dev_t *info = PRIV(dev);
struct pcmcia_device *link = info->p_dev;
unsigned int nic_base = dev->base_addr;
dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name);
if (!pcmcia_dev_present(link))
return -ENODEV;
outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */
ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev);
if (ret)
return ret;
link->open++;
info->link_status = 0x00;
init_timer(&info->watchdog);
info->watchdog.function = ei_watchdog;
info->watchdog.data = (u_long)dev;
info->watchdog.expires = jiffies + HZ;
add_timer(&info->watchdog);
return ax_open(dev);
} /* axnet_open */
/*====================================================================*/
static int axnet_close(struct net_device *dev)
{
axnet_dev_t *info = PRIV(dev);
struct pcmcia_device *link = info->p_dev;
dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name);
ax_close(dev);
free_irq(dev->irq, dev);
link->open--;
netif_stop_queue(dev);
del_timer_sync(&info->watchdog);
return 0;
} /* axnet_close */
/*======================================================================
Hard reset the card. This used to pause for the same period that
a 8390 reset command required, but that shouldn't be necessary.
======================================================================*/
static void axnet_reset_8390(struct net_device *dev)
{
unsigned int nic_base = dev->base_addr;
int i;
ei_status.txing = ei_status.dmaing = 0;
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
for (i = 0; i < 100; i++) {
if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
break;
udelay(100);
}
outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
if (i == 100)
netdev_err(dev, "axnet_reset_8390() did not complete\n");
} /* axnet_reset_8390 */
/*====================================================================*/
static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
PRIV(dev)->stale = 0;
return ax_interrupt(irq, dev_id);
}
static void ei_watchdog(u_long arg)
{
struct net_device *dev = (struct net_device *)(arg);
axnet_dev_t *info = PRIV(dev);
unsigned int nic_base = dev->base_addr;
unsigned int mii_addr = nic_base + AXNET_MII_EEP;
u_short link;
if (!netif_device_present(dev)) goto reschedule;
/* Check for pending interrupt with expired latency timer: with
this, we can limp along even if the interrupt is blocked */
if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
if (!info->fast_poll)
netdev_info(dev, "interrupt(s) dropped!\n");
ei_irq_wrapper(dev->irq, dev);
info->fast_poll = HZ;
}
if (info->fast_poll) {
info->fast_poll--;
info->watchdog.expires = jiffies + 1;
add_timer(&info->watchdog);
return;
}
if (info->phy_id < 0)
goto reschedule;
link = mdio_read(mii_addr, info->phy_id, 1);
if (!link || (link == 0xffff)) {
netdev_info(dev, "MII is missing!\n");
info->phy_id = -1;
goto reschedule;
}
link &= 0x0004;
if (link != info->link_status) {
u_short p = mdio_read(mii_addr, info->phy_id, 5);
netdev_info(dev, "%s link beat\n", link ? "found" : "lost");
if (link) {
info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
if (p)
netdev_info(dev, "autonegotiation complete: %dbaseT-%cD selected\n",
(p & 0x0180) ? 100 : 10, (p & 0x0140) ? 'F' : 'H');
else
netdev_info(dev, "link partner did not autonegotiate\n");
AX88190_init(dev, 1);
}
info->link_status = link;
}
reschedule:
info->watchdog.expires = jiffies + HZ;
add_timer(&info->watchdog);
}
/*====================================================================*/
static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
axnet_dev_t *info = PRIV(dev);
struct mii_ioctl_data *data = if_mii(rq);
unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP;
switch (cmd) {
case SIOCGMIIPHY:
data->phy_id = info->phy_id;
case SIOCGMIIREG: /* Read MII PHY register. */
data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f);
return 0;
case SIOCSMIIREG: /* Write MII PHY register. */
mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in);
return 0;
}
return -EOPNOTSUPP;
}
/*====================================================================*/
static void get_8390_hdr(struct net_device *dev,
struct e8390_pkt_hdr *hdr,
int ring_page)
{
unsigned int nic_base = dev->base_addr;
outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
outb_p(ring_page, nic_base + EN0_RSARHI);
outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
insw(nic_base + AXNET_DATAPORT, hdr,
sizeof(struct e8390_pkt_hdr)>>1);
/* Fix for big endian systems */
hdr->count = le16_to_cpu(hdr->count);
}
/*====================================================================*/
static void block_input(struct net_device *dev, int count,
struct sk_buff *skb, int ring_offset)
{
unsigned int nic_base = dev->base_addr;
int xfer_count = count;
char *buf = skb->data;
if ((ei_debug > 4) && (count != 4))
pr_debug("%s: [bi=%d]\n", dev->name, count+4);
outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
insw(nic_base + AXNET_DATAPORT,buf,count>>1);
if (count & 0x01)
buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++;
}
/*====================================================================*/
static void block_output(struct net_device *dev, int count,
const u_char *buf, const int start_page)
{
unsigned int nic_base = dev->base_addr;
pr_debug("%s: [bo=%d]\n", dev->name, count);
/* Round the count up for word writes. Do we need to do this?
What effect will an odd byte count have on the 8390?
I should check someday. */
if (count & 0x01)
count++;
outb_p(0x00, nic_base + EN0_RSARLO);
outb_p(start_page, nic_base + EN0_RSARHI);
outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
}
static const struct pcmcia_device_id axnet_ids[] = {
PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
PCMCIA_DEVICE_MANF_CARD(0x01bf, 0x2328),
PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202),
PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090),
PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061),
PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2),
PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875),
PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef),
PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
static struct pcmcia_driver axnet_cs_driver = {
.owner = THIS_MODULE,
.name = "axnet_cs",
.probe = axnet_probe,
.remove = axnet_detach,
.id_table = axnet_ids,
.suspend = axnet_suspend,
.resume = axnet_resume,
};
static int __init init_axnet_cs(void)
{
return pcmcia_register_driver(&axnet_cs_driver);
}
static void __exit exit_axnet_cs(void)
{
pcmcia_unregister_driver(&axnet_cs_driver);
}
module_init(init_axnet_cs);
module_exit(exit_axnet_cs);
/*====================================================================*/
/* 8390.c: A general NS8390 ethernet driver core for linux. */
/*
Written 1992-94 by Donald Becker.
Copyright 1993 United States Government as represented by the
Director, National Security Agency.
This software may be used and distributed according to the terms
of the GNU General Public License, incorporated herein by reference.
The author may be reached as becker@scyld.com, or C/O
Scyld Computing Corporation
410 Severn Ave., Suite 210
Annapolis MD 21403
This is the chip-specific code for many 8390-based ethernet adaptors.
This is not a complete driver, it must be combined with board-specific
code such as ne.c, wd.c, 3c503.c, etc.
Seeing how at least eight drivers use this code, (not counting the
PCMCIA ones either) it is easy to break some card by what seems like
a simple innocent change. Please contact me or Donald if you think
you have found something that needs changing. -- PG
Changelog:
Paul Gortmaker : remove set_bit lock, other cleanups.
Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
ei_block_input() for eth_io_copy_and_sum().
Paul Gortmaker : exchange static int ei_pingpong for a #define,
also add better Tx error handling.
Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
Paul Gortmaker : tweak ANK's above multicast changes a bit.
Paul Gortmaker : update packet statistics for v2.1.x
Alan Cox : support arbitrary stupid port mappings on the
68K Macintosh. Support >16bit I/O spaces
Paul Gortmaker : add kmod support for auto-loading of the 8390
module by all drivers that require it.
Alan Cox : Spinlocking work, added 'BUG_83C690'
Paul Gortmaker : Separate out Tx timeout code from Tx path.
Sources:
The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
*/
#include <linux/bitops.h>
#include <asm/irq.h>
#include <linux/fcntl.h>
#include <linux/in.h>
#include <linux/interrupt.h>
#define BUG_83C690
/* These are the operational function interfaces to board-specific
routines.
void reset_8390(struct net_device *dev)
Resets the board associated with DEV, including a hardware reset of
the 8390. This is only called when there is a transmit timeout, and
it is always followed by 8390_init().
void block_output(struct net_device *dev, int count, const unsigned char *buf,
int start_page)
Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
"page" value uses the 8390's 256-byte pages.
void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
Read the 4 byte, page aligned 8390 header. *If* there is a
subsequent read, it will be of the rest of the packet.
void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
Read COUNT bytes from the packet buffer into the skb data area. Start
reading from RING_OFFSET, the address as the 8390 sees it. This will always
follow the read of the 8390 header.
*/
#define ei_reset_8390 (ei_local->reset_8390)
#define ei_block_output (ei_local->block_output)
#define ei_block_input (ei_local->block_input)
#define ei_get_8390_hdr (ei_local->get_8390_hdr)
/* use 0 for production, 1 for verification, >2 for debug */
#ifndef ei_debug
int ei_debug = 1;
#endif
/* Index to functions. */
static void ei_tx_intr(struct net_device *dev);
static void ei_tx_err(struct net_device *dev);
static void ei_receive(struct net_device *dev);
static void ei_rx_overrun(struct net_device *dev);
/* Routines generic to NS8390-based boards. */
static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
int start_page);
static void do_set_multicast_list(struct net_device *dev);
/*
* SMP and the 8390 setup.
*
* The 8390 isn't exactly designed to be multithreaded on RX/TX. There is
* a page register that controls bank and packet buffer access. We guard
* this with ei_local->page_lock. Nobody should assume or set the page other
* than zero when the lock is not held. Lock holders must restore page 0
* before unlocking. Even pure readers must take the lock to protect in
* page 0.
*
* To make life difficult the chip can also be very slow. We therefore can't
* just use spinlocks. For the longer lockups we disable the irq the device
* sits on and hold the lock. We must hold the lock because there is a dual
* processor case other than interrupts (get stats/set multicast list in
* parallel with each other and transmit).
*
* Note: in theory we can just disable the irq on the card _but_ there is
* a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
* enter lock, take the queued irq. So we waddle instead of flying.
*
* Finally by special arrangement for the purpose of being generally
* annoying the transmit function is called bh atomic. That places
* restrictions on the user context callers as disable_irq won't save
* them.
*/
/**
* ax_open - Open/initialize the board.
* @dev: network device to initialize
*
* This routine goes all-out, setting everything
* up anew at each open, even though many of these registers should only
* need to be set once at boot.
*/
static int ax_open(struct net_device *dev)
{
unsigned long flags;
struct ei_device *ei_local = netdev_priv(dev);
/*
* Grab the page lock so we own the register set, then call
* the init function.
*/
spin_lock_irqsave(&ei_local->page_lock, flags);
AX88190_init(dev, 1);
/* Set the flag before we drop the lock, That way the IRQ arrives
after its set and we get no silly warnings */
netif_start_queue(dev);
spin_unlock_irqrestore(&ei_local->page_lock, flags);
ei_local->irqlock = 0;
return 0;
}
#define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
/**
* ax_close - shut down network device
* @dev: network device to close
*
* Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
*/
static int ax_close(struct net_device *dev)
{
unsigned long flags;
/*
* Hold the page lock during close
*/
spin_lock_irqsave(&dev_lock(dev), flags);
AX88190_init(dev, 0);
spin_unlock_irqrestore(&dev_lock(dev), flags);
netif_stop_queue(dev);
return 0;
}
/**
* axnet_tx_timeout - handle transmit time out condition
* @dev: network device which has apparently fallen asleep
*
* Called by kernel when device never acknowledges a transmit has
* completed (or failed) - i.e. never posted a Tx related interrupt.
*/
static void axnet_tx_timeout(struct net_device *dev)
{
long e8390_base = dev->base_addr;
struct ei_device *ei_local = netdev_priv(dev);
int txsr, isr, tickssofar = jiffies - dev_trans_start(dev);
unsigned long flags;
dev->stats.tx_errors++;
spin_lock_irqsave(&ei_local->page_lock, flags);
txsr = inb(e8390_base+EN0_TSR);
isr = inb(e8390_base+EN0_ISR);
spin_unlock_irqrestore(&ei_local->page_lock, flags);
netdev_printk(KERN_DEBUG, dev,
"Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
(txsr & ENTSR_ABT) ? "excess collisions." :
(isr) ? "lost interrupt?" : "cable problem?",
txsr, isr, tickssofar);
if (!isr && !dev->stats.tx_packets)
{
/* The 8390 probably hasn't gotten on the cable yet. */
ei_local->interface_num ^= 1; /* Try a different xcvr. */
}
/* Ugly but a reset can be slow, yet must be protected */
spin_lock_irqsave(&ei_local->page_lock, flags);
/* Try to restart the card. Perhaps the user has fixed something. */
ei_reset_8390(dev);
AX88190_init(dev, 1);
spin_unlock_irqrestore(&ei_local->page_lock, flags);
netif_wake_queue(dev);
}
/**
* axnet_start_xmit - begin packet transmission
* @skb: packet to be sent
* @dev: network device to which packet is sent
*
* Sends a packet to an 8390 network device.
*/
static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
long e8390_base = dev->base_addr;
struct ei_device *ei_local = netdev_priv(dev);
int length, send_length, output_page;
unsigned long flags;
u8 packet[ETH_ZLEN];
netif_stop_queue(dev);
length = skb->len;
/* Mask interrupts from the ethercard.
SMP: We have to grab the lock here otherwise the IRQ handler
on another CPU can flip window and race the IRQ mask set. We end
up trashing the mcast filter not disabling irqs if we don't lock */
spin_lock_irqsave(&ei_local->page_lock, flags);
outb_p(0x00, e8390_base + EN0_IMR);
/*
* Slow phase with lock held.
*/
ei_local->irqlock = 1;
send_length = max(length, ETH_ZLEN);