summaryrefslogtreecommitdiff
path: root/drivers/usb/net/catc.c
blob: f740325abac42bbd762148b6c81a31be94ce4882 (plain)
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
/*
 *  Copyright (c) 2001 Vojtech Pavlik
 *
 *  CATC EL1210A NetMate USB Ethernet driver
 *
 *  Sponsored by SuSE
 *
 *  Based on the work of
 *		Donald Becker
 * 
 *  Old chipset support added by Simon Evans <spse@secret.org.uk> 2002
 *    - adds support for Belkin F5U011
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or 
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 * 
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/ethtool.h>
#include <linux/crc32.h>
#include <linux/bitops.h>
#include <asm/uaccess.h>

#undef DEBUG

#include <linux/usb.h>

/*
 * Version information.
 */

#define DRIVER_VERSION "v2.8"
#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@suse.cz>"
#define DRIVER_DESC "CATC EL1210A NetMate USB Ethernet driver"
#define SHORT_DRIVER_DESC "EL1210A NetMate USB Ethernet"

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

static const char driver_name[] = "catc";

/*
 * Some defines.
 */ 

#define STATS_UPDATE		(HZ)	/* Time between stats updates */
#define TX_TIMEOUT		(5*HZ)	/* Max time the queue can be stopped */
#define PKT_SZ			1536	/* Max Ethernet packet size */
#define RX_MAX_BURST		15	/* Max packets per rx buffer (> 0, < 16) */
#define TX_MAX_BURST		15	/* Max full sized packets per tx buffer (> 0) */
#define CTRL_QUEUE		16	/* Max control requests in flight (power of two) */
#define RX_PKT_SZ		1600	/* Max size of receive packet for F5U011 */

/*
 * Control requests.
 */

enum control_requests {
	ReadMem =	0xf1,
	GetMac =	0xf2,
	Reset =		0xf4,
	SetMac =	0xf5,
	SetRxMode =     0xf5,  /* F5U011 only */
	WriteROM =	0xf8,
	SetReg =	0xfa,
	GetReg =	0xfb,
	WriteMem =	0xfc,
	ReadROM =	0xfd,
};

/*
 * Registers.
 */

enum register_offsets {
	TxBufCount =	0x20,
	RxBufCount =	0x21,
	OpModes =	0x22,
	TxQed =		0x23,
	RxQed =		0x24,
	MaxBurst =	0x25,
	RxUnit =	0x60,
	EthStatus =	0x61,
	StationAddr0 =	0x67,
	EthStats =	0x69,
	LEDCtrl =	0x81,
};

enum eth_stats {
	TxSingleColl =	0x00,
        TxMultiColl =	0x02,
        TxExcessColl =	0x04,
        RxFramErr =	0x06,
};

enum op_mode_bits {
	Op3MemWaits =	0x03,
	OpLenInclude =	0x08,
	OpRxMerge =	0x10,
	OpTxMerge =	0x20,
	OpWin95bugfix =	0x40,
	OpLoopback =	0x80,
};

enum rx_filter_bits {
	RxEnable =	0x01,
	RxPolarity =	0x02,
	RxForceOK =	0x04,
	RxMultiCast =	0x08,
	RxPromisc =	0x10,
	AltRxPromisc =  0x20, /* F5U011 uses different bit */
};

enum led_values {
	LEDFast = 	0x01,
	LEDSlow =	0x02,
	LEDFlash =	0x03,
	LEDPulse =	0x04,
	LEDLink =	0x08,
};

enum link_status {
	LinkNoChange = 0,
	LinkGood     = 1,
	LinkBad      = 2
};

/*
 * The catc struct.
 */

#define CTRL_RUNNING	0
#define RX_RUNNING	1
#define TX_RUNNING	2

struct catc {
	struct net_device *netdev;
	struct usb_device *usbdev;

	struct net_device_stats stats;
	unsigned long flags;

	unsigned int tx_ptr, tx_idx;
	unsigned int ctrl_head, ctrl_tail;
	spinlock_t tx_lock, ctrl_lock;

	u8 tx_buf[2][TX_MAX_BURST * (PKT_SZ + 2)];
	u8 rx_buf[RX_MAX_BURST * (PKT_SZ + 2)];
	u8 irq_buf[2];
	u8 ctrl_buf[64];
	struct usb_ctrlrequest ctrl_dr;

	struct timer_list timer;
	u8 stats_buf[8];
	u16 stats_vals[4];
	unsigned long last_stats;

	u8 multicast[64];

	struct ctrl_queue {
		u8 dir;
		u8 request;
		u16 value;
		u16 index;
		void *buf;
		int len;
		void (*callback)(struct catc *catc, struct ctrl_queue *q);
	} ctrl_queue[CTRL_QUEUE];

	struct urb *tx_urb, *rx_urb, *irq_urb, *ctrl_urb;

	u8 is_f5u011;	/* Set if device is an F5U011 */
	u8 rxmode[2];	/* Used for F5U011 */
	atomic_t recq_sz; /* Used for F5U011 - counter of waiting rx packets */
};

/*
 * Useful macros.
 */

#define catc_get_mac(catc, mac)				catc_ctrl_msg(catc, USB_DIR_IN,  GetMac, 0, 0, mac,  6)
#define catc_reset(catc)				catc_ctrl_msg(catc, USB_DIR_OUT, Reset, 0, 0, NULL, 0)
#define catc_set_reg(catc, reg, val)			catc_ctrl_msg(catc, USB_DIR_OUT, SetReg, val, reg, NULL, 0)
#define catc_get_reg(catc, reg, buf)			catc_ctrl_msg(catc, USB_DIR_IN,  GetReg, 0, reg, buf, 1)
#define catc_write_mem(catc, addr, buf, size)		catc_ctrl_msg(catc, USB_DIR_OUT, WriteMem, 0, addr, buf, size)
#define catc_read_mem(catc, addr, buf, size)		catc_ctrl_msg(catc, USB_DIR_IN,  ReadMem, 0, addr, buf, size)

#define f5u011_rxmode(catc, rxmode)			catc_ctrl_msg(catc, USB_DIR_OUT, SetRxMode, 0, 1, rxmode, 2)
#define f5u011_rxmode_async(catc, rxmode)		catc_ctrl_async(catc, USB_DIR_OUT, SetRxMode, 0, 1, &rxmode, 2, NULL)
#define f5u011_mchash_async(catc, hash)			catc_ctrl_async(catc, USB_DIR_OUT, SetRxMode, 0, 2, &hash, 8, NULL)

#define catc_set_reg_async(catc, reg, val)		catc_ctrl_async(catc, USB_DIR_OUT, SetReg, val, reg, NULL, 0, NULL)
#define catc_get_reg_async(catc, reg, cb)		catc_ctrl_async(catc, USB_DIR_IN, GetReg, 0, reg, NULL, 1, cb)
#define catc_write_mem_async(catc, addr, buf, size)	catc_ctrl_async(catc, USB_DIR_OUT, WriteMem, 0, addr, buf, size, NULL)

/*
 * Receive routines.
 */

static void catc_rx_done(struct urb *urb)
{
	struct catc *catc = urb->context;
	u8 *pkt_start = urb->transfer_buffer;
	struct sk_buff *skb;
	int pkt_len, pkt_offset = 0;

	if (!catc->is_f5u011) {
		clear_bit(RX_RUNNING, &catc->flags);
		pkt_offset = 2;
	}

	if (urb->status) {
		dbg("rx_done, status %d, length %d", urb->status, urb->actual_length);
		return;
	}

	do {
		if(!catc->is_f5u011) {
			pkt_len = le16_to_cpup((__le16*)pkt_start);
			if (pkt_len > urb->actual_length) {
				catc->stats.rx_length_errors++;
				catc->stats.rx_errors++;
				break;
			}
		} else {
			pkt_len = urb->actual_length;
		}

		if (!(skb = dev_alloc_skb(pkt_len)))
			return;

		skb->dev = catc->netdev;
		eth_copy_and_sum(skb, pkt_start + pkt_offset, pkt_len, 0);
		skb_put(skb, pkt_len);

		skb->protocol = eth_type_trans(skb, catc->netdev);
		netif_rx(skb);

		catc->stats.rx_packets++;
		catc->stats.rx_bytes += pkt_len;

		/* F5U011 only does one packet per RX */
		if (catc->is_f5u011)
			break;
		pkt_start += (((pkt_len + 1) >> 6) + 1) << 6;

	} while (pkt_start - (u8 *) urb->transfer_buffer < urb->actual_length);

	catc->netdev->last_rx = jiffies;

	if (catc->is_f5u011) {
		if (atomic_read(&catc->recq_sz)) {
			int status;
			atomic_dec(&catc->recq_sz);
			dbg("getting extra packet");
			urb->dev = catc->usbdev;
			if ((status = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
				dbg("submit(rx_urb) status %d", status);
			}
		} else {
			clear_bit(RX_RUNNING, &catc->flags);
		}
	}
}

static void catc_irq_done(struct urb *urb)
{
	struct catc *catc = urb->context;
	u8 *data = urb->transfer_buffer;
	int status;
	unsigned int hasdata = 0, linksts = LinkNoChange;

	if (!catc->is_f5u011) {
		hasdata = data[1] & 0x80;
		if (data[1] & 0x40)
			linksts = LinkGood;
		else if (data[1] & 0x20)
			linksts = LinkBad;
	} else {
		hasdata = (unsigned int)(be16_to_cpup((__be16*)data) & 0x0fff);
		if (data[0] == 0x90)
			linksts = LinkGood;
		else if (data[0] == 0xA0)
			linksts = LinkBad;
	}

	switch (urb->status) {
	case 0:			/* success */
		break;
	case -ECONNRESET:	/* unlink */
	case -ENOENT:
	case -ESHUTDOWN:
		return;
	/* -EPIPE:  should clear the halt */
	default:		/* error */
		dbg("irq_done, status %d, data %02x %02x.", urb->status, data[0], data[1]);
		goto resubmit;
	}

	if (linksts == LinkGood) {
		netif_carrier_on(catc->netdev);
		dbg("link ok");
	}

	if (linksts == LinkBad) {
		netif_carrier_off(catc->netdev);
		dbg("link bad");
	}

	if (hasdata) {
		if (test_and_set_bit(RX_RUNNING, &catc->flags)) {
			if (catc->is_f5u011)
				atomic_inc(&catc->recq_sz);
		} else {
			catc->rx_urb->dev = catc->usbdev;
			if ((status = usb_submit_urb(catc->rx_urb, GFP_ATOMIC)) < 0) {
				err("submit(rx_urb) status %d", status);
			}
		} 
	}
resubmit:
	status = usb_submit_urb (urb, SLAB_ATOMIC);
	if (status)
		err ("can't resubmit intr, %s-%s, status %d",
				catc->usbdev->bus->bus_name,
				catc->usbdev->devpath, status);
}

/*
 * Transmit routines.
 */

static void catc_tx_run(struct catc *catc)
{
	int status;

	if (catc->is_f5u011)
		catc->tx_ptr = (catc->tx_ptr + 63) & ~63;

	catc->tx_urb->transfer_buffer_length = catc->tx_ptr;
	catc->tx_urb->transfer_buffer = catc->tx_buf[catc->tx_idx];
	catc->tx_urb->dev = catc->usbdev;

	if ((status = usb_submit_urb(catc->tx_urb, GFP_ATOMIC)) < 0)
		err("submit(tx_urb), status %d", status);

	catc->tx_idx = !catc->tx_idx;
	catc->tx_ptr = 0;

	catc->netdev->trans_start = jiffies;
}

static void catc_tx_done(struct urb *urb)
{
	struct catc *catc = urb->context;
	unsigned long flags;

	if (urb->status == -ECONNRESET) {
		dbg("Tx Reset.");
		urb->status = 0;
		catc->netdev->trans_start = jiffies;
		catc->stats.tx_errors++;
		clear_bit(TX_RUNNING, &catc->flags);
		netif_wake_queue(catc->netdev);
		return;
	}

	if (urb->status) {
		dbg("tx_done, status %d, length %d", urb->status, urb->actual_length);
		return;
	}

	spin_lock_irqsave(&catc->tx_lock, flags);

	if (catc->tx_ptr)
		catc_tx_run(catc);
	else
		clear_bit(TX_RUNNING, &catc->flags);

	netif_wake_queue(catc->netdev);

	spin_unlock_irqrestore(&catc->tx_lock, flags);
}

static int catc_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
{
	struct catc *catc = netdev_priv(netdev);
	unsigned long flags;
	char *tx_buf;

	spin_lock_irqsave(&catc->tx_lock, flags);

	catc->tx_ptr = (((catc->tx_ptr - 1) >> 6) + 1) << 6;
	tx_buf = catc->tx_buf[catc->tx_idx] + catc->tx_ptr;
	*((u16*)tx_buf) = (catc->is_f5u011) ? cpu_to_be16((u16)skb->len) : cpu_to_le16((u16)skb->len);
	memcpy(tx_buf + 2, skb->data, skb->len);
	catc->tx_ptr += skb->len + 2;

	if (!test_and_set_bit(TX_RUNNING, &catc->flags))
		catc_tx_run(catc);

	if ((catc->is_f5u011 && catc->tx_ptr)
	     || (catc->tx_ptr >= ((TX_MAX_BURST - 1) * (PKT_SZ + 2))))
		netif_stop_queue(netdev);

	spin_unlock_irqrestore(&catc->tx_lock, flags);

	catc->stats.tx_bytes += skb->len;
	catc->stats.tx_packets++;

	dev_kfree_skb(skb);

	return 0;
}

static void catc_tx_timeout(struct net_device *netdev)
{
	struct catc *catc = netdev_priv(netdev);

	warn("Transmit timed out.");
	usb_unlink_urb(catc->tx_urb);
}

/*
 * Control messages.
 */

static int catc_ctrl_msg(struct catc *catc, u8 dir, u8 request, u16 value, u16 index, void *buf, int len)
{
        int retval = usb_control_msg(catc->usbdev,
		dir ? usb_rcvctrlpipe(catc->usbdev, 0) : usb_sndctrlpipe(catc->usbdev, 0),
		 request, 0x40 | dir, value, index, buf, len, 1000);
        return retval < 0 ? retval : 0;
}

static void catc_ctrl_run(struct catc *catc)
{
	struct ctrl_queue *q = catc->ctrl_queue + catc->ctrl_tail;
	struct usb_device *usbdev = catc->usbdev;
	struct urb *urb = catc->ctrl_urb;
	struct usb_ctrlrequest *dr = &catc->ctrl_dr;
	int status;

	dr->bRequest = q->request;
	dr->bRequestType = 0x40 | q->dir;
	dr->wValue = cpu_to_le16(q->value);
	dr->wIndex = cpu_to_le16(q->index);
	dr->wLength = cpu_to_le16(q->len);

        urb->pipe = q->dir ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0);
	urb->transfer_buffer_length = q->len;
	urb->transfer_buffer = catc->ctrl_buf;
	urb->setup_packet = (void *) dr;
	urb->dev = usbdev;

	if (!q->dir && q->buf && q->len)
		memcpy(catc->ctrl_buf, q->buf, q->len);

	if ((status = usb_submit_urb(catc->ctrl_urb, GFP_KERNEL)))
		err("submit(ctrl_urb) status %d", status);
}

static void catc_ctrl_done(struct urb *urb)
{
	struct catc *catc = urb->context;
	struct ctrl_queue *q;
	unsigned long flags;

	if (urb->status)
		dbg("ctrl_done, status %d, len %d.", urb->status, urb->actual_length);

	spin_lock_irqsave(&catc->ctrl_lock, flags);

	q = catc->ctrl_queue + catc->ctrl_tail;

	if (q->dir) {
		if (q->buf && q->len)
			memcpy(q->buf, catc->ctrl_buf, q->len);
		else
			q->buf = catc->ctrl_buf;
	}

	if (q->callback)
		q->callback(catc, q);

	catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);

	if (catc->ctrl_head != catc->ctrl_tail)
		catc_ctrl_run(catc);
	else
		clear_bit(CTRL_RUNNING, &catc->flags);

	spin_unlock_irqrestore(&catc->ctrl_lock, flags);
}

static int catc_ctrl_async(struct catc *catc, u8 dir, u8 request, u16 value,
	u16 index, void *buf, int len, void (*callback)(struct catc *catc, struct ctrl_queue *q))
{
	struct ctrl_queue *q;
	int retval = 0;
	unsigned long flags;

	spin_lock_irqsave(&catc->ctrl_lock, flags);
	
	q = catc->ctrl_queue + catc->ctrl_head;

	q->dir = dir;
	q->request = request;
	q->value = value;
	q->index = index;
	q->buf = buf;
	q->len = len;
	q->callback = callback;

	catc->ctrl_head = (catc->ctrl_head + 1) & (CTRL_QUEUE - 1);

	if (catc->ctrl_head == catc->ctrl_tail) {
		err("ctrl queue full");
		catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);
		retval = -1;
	}

	if (!test_and_set_bit(CTRL_RUNNING, &catc->flags))
		catc_ctrl_run(catc);

	spin_unlock_irqrestore(&catc->ctrl_lock, flags);

	return retval;
}

/*
 * Statistics.
 */

static void catc_stats_done(struct catc *catc, struct ctrl_queue *q)
{
	int index = q->index - EthStats;
	u16 data, last;

	catc->stats_buf[index] = *((char *)q->buf);

	if (index & 1)
		return;

	data = ((u16)catc->stats_buf[index] << 8) | catc->stats_buf[index + 1];
	last = catc->stats_vals[index >> 1];

	switch (index) {
		case TxSingleColl:
		case TxMultiColl:
			catc->stats.collisions += data - last;
			break;
		case TxExcessColl:
			catc->stats.tx_aborted_errors += data - last;
			catc->stats.tx_errors += data - last;
			break;
		case RxFramErr:
			catc->stats.rx_frame_errors += data - last;
			catc->stats.rx_errors += data - last;
			break;
	}

	catc->stats_vals[index >> 1] = data;
}

static void catc_stats_timer(unsigned long data)
{
	struct catc *catc = (void *) data;
	int i;

	for (i = 0; i < 8; i++)
		catc_get_reg_async(catc, EthStats + 7 - i, catc_stats_done);

	mod_timer(&catc->timer, jiffies + STATS_UPDATE);
}

static struct net_device_stats *catc_get_stats(struct net_device *netdev)
{
	struct catc *catc = netdev_priv(netdev);
	return &catc->stats;
}

/*
 * Receive modes. Broadcast, Multicast, Promisc.
 */

static void catc_multicast(unsigned char *addr, u8 *multicast)
{
	u32 crc;

	crc = ether_crc_le(6, addr);
	multicast[(crc >> 3) & 0x3f] |= 1 << (crc & 7);
}

static void catc_set_multicast_list(struct net_device *netdev)
{
	struct catc *catc = netdev_priv(netdev);
	struct dev_mc_list *mc;
	u8 broadcast[6];
	u8 rx = RxEnable | RxPolarity | RxMultiCast;
	int i;

	memset(broadcast, 0xff, 6);
	memset(catc->multicast, 0, 64);

	catc_multicast(broadcast, catc->multicast);
	catc_multicast(netdev->dev_addr, catc->multicast);

	if (netdev->flags & IFF_PROMISC) {
		memset(catc->multicast, 0xff, 64);
		rx |= (!catc->is_f5u011) ? RxPromisc : AltRxPromisc;
	} 

	if (netdev->flags & IFF_ALLMULTI) {
		memset(catc->multicast, 0xff, 64);
	} else {
		for (i = 0, mc = netdev->mc_list; mc && i < netdev->mc_count; i++, mc = mc->next) {
			u32 crc = ether_crc_le(6, mc->dmi_addr);
			if (!catc->is_f5u011) {
				catc->multicast[(crc >> 3) & 0x3f] |= 1 << (crc & 7);
			} else {
				catc->multicast[7-(crc >> 29)] |= 1 << ((crc >> 26) & 7);
			}
		}
	}
	if (!catc->is_f5u011) {
		catc_set_reg_async(catc, RxUnit, rx);
		catc_write_mem_async(catc, 0xfa80, catc->multicast, 64);
	} else {
		f5u011_mchash_async(catc, catc->multicast);
		if (catc->rxmode[0] != rx) {
			catc->rxmode[0] = rx;
			dbg("Setting RX mode to %2.2X %2.2X", catc->rxmode[0], catc->rxmode[1]);
			f5u011_rxmode_async(catc, catc->rxmode);
		}
	}
}

static void catc_get_drvinfo(struct net_device *dev,
			     struct ethtool_drvinfo *info)
{
	struct catc *catc = netdev_priv(dev);
	strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
	strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
	usb_make_path (catc->usbdev, info->bus_info, sizeof info->bus_info);
}

static int catc_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct catc *catc = netdev_priv(dev);
	if (!catc->is_f5u011)
		return -EOPNOTSUPP;

	cmd->supported = SUPPORTED_10baseT_Half | SUPPORTED_TP;
	cmd->advertising = ADVERTISED_10baseT_Half | ADVERTISED_TP;
	cmd->speed = SPEED_10;
	cmd->duplex = DUPLEX_HALF;
	cmd->port = PORT_TP; 
	cmd->phy_address = 0;
	cmd->transceiver = XCVR_INTERNAL;
	cmd->autoneg = AUTONEG_DISABLE;
	cmd->maxtxpkt = 1;
	cmd->maxrxpkt = 1;
	return 0;
}

static struct ethtool_ops ops = {
	.get_drvinfo = catc_get_drvinfo,
	.get_settings = catc_get_settings,
	.get_link = ethtool_op_get_link
};

/*
 * Open, close.
 */

static int catc_open(struct net_device *netdev)
{
	struct catc *catc = netdev_priv(netdev);
	int status;

	catc->irq_urb->dev = catc->usbdev;
	if ((status = usb_submit_urb(catc->irq_urb, GFP_KERNEL)) < 0) {
		err("submit(irq_urb) status %d", status);
		return -1;
	}

	netif_start_queue(netdev);

	if (!catc->is_f5u011)
		mod_timer(&catc->timer, jiffies + STATS_UPDATE);

	return 0;
}

static int catc_stop(struct net_device *netdev)
{
	struct catc *catc = netdev_priv(netdev);

	netif_stop_queue(netdev);

	if (!catc->is_f5u011)
		del_timer_sync(&catc->timer);

	usb_kill_urb(catc->rx_urb);
	usb_kill_urb(catc->tx_urb);
	usb_kill_urb(catc->irq_urb);
	usb_kill_urb(catc->ctrl_urb);

	return 0;
}

/*
 * USB probe, disconnect.
 */

static int catc_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
	struct usb_device *usbdev = interface_to_usbdev(intf);
	struct net_device *netdev;
	struct catc *catc;
	u8 broadcast[6];
	int i, pktsz;

	if (usb_set_interface(usbdev,
			intf->altsetting->desc.bInterfaceNumber, 1)) {
                err("Can't set altsetting 1.");
		return -EIO;
	}

	netdev = alloc_etherdev(sizeof(struct catc));
	if (!netdev)
		return -ENOMEM;

	catc = netdev_priv(netdev);

	netdev->open = catc_open;
	netdev->hard_start_xmit = catc_hard_start_xmit;
	netdev->stop = catc_stop;
	netdev->get_stats = catc_get_stats;
	netdev->tx_timeout = catc_tx_timeout;
	netdev->watchdog_timeo = TX_TIMEOUT;
	netdev->set_multicast_list = catc_set_multicast_list;
	SET_ETHTOOL_OPS(netdev, &ops);

	catc->usbdev = usbdev;
	catc->netdev = netdev;

	spin_lock_init(&catc->tx_lock);
	spin_lock_init(&catc->ctrl_lock);

	init_timer(&catc->timer);
	catc->timer.data = (long) catc;
	catc->timer.function = catc_stats_timer;

	catc->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
	catc->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
	catc->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
	catc->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
	if ((!catc->ctrl_urb) || (!catc->tx_urb) || 
	    (!catc->rx_urb) || (!catc->irq_urb)) {
		err("No free urbs available.");
		if (catc->ctrl_urb)
			usb_free_urb(catc->ctrl_urb);
		if (catc->tx_urb)
			usb_free_urb(catc->tx_urb);
		if (catc->rx_urb)
			usb_free_urb(catc->rx_urb);
		if (catc->irq_urb)
			usb_free_urb(catc->irq_urb);
		free_netdev(netdev);
		return -ENOMEM;
	}

	/* The F5U011 has the same vendor/product as the netmate but a device version of 0x130 */
	if (le16_to_cpu(usbdev->descriptor.idVendor) == 0x0423 && 
	    le16_to_cpu(usbdev->descriptor.idProduct) == 0xa &&
	    le16_to_cpu(catc->usbdev->descriptor.bcdDevice) == 0x0130) {
		dbg("Testing for f5u011");
		catc->is_f5u011 = 1;		
		atomic_set(&catc->recq_sz, 0);
		pktsz = RX_PKT_SZ;
	} else {
		pktsz = RX_MAX_BURST * (PKT_SZ + 2);
	}
	
	usb_fill_control_urb(catc->ctrl_urb, usbdev, usb_sndctrlpipe(usbdev, 0),
		NULL, NULL, 0, catc_ctrl_done, catc);

	usb_fill_bulk_urb(catc->tx_urb, usbdev, usb_sndbulkpipe(usbdev, 1),
		NULL, 0, catc_tx_done, catc);

	usb_fill_bulk_urb(catc->rx_urb, usbdev, usb_rcvbulkpipe(usbdev, 1),
		catc->rx_buf, pktsz, catc_rx_done, catc);

	usb_fill_int_urb(catc->irq_urb, usbdev, usb_rcvintpipe(usbdev, 2),
                catc->irq_buf, 2, catc_irq_done, catc, 1);

	if (!catc->is_f5u011) {
		dbg("Checking memory size\n");

		i = 0x12345678;
		catc_write_mem(catc, 0x7a80, &i, 4);
		i = 0x87654321;	
		catc_write_mem(catc, 0xfa80, &i, 4);
		catc_read_mem(catc, 0x7a80, &i, 4);
	  
		switch (i) {
		case 0x12345678:
			catc_set_reg(catc, TxBufCount, 8);
			catc_set_reg(catc, RxBufCount, 32);
			dbg("64k Memory\n");
			break;
		default:
			warn("Couldn't detect memory size, assuming 32k");
		case 0x87654321:
			catc_set_reg(catc, TxBufCount, 4);
			catc_set_reg(catc, RxBufCount, 16);
			dbg("32k Memory\n");
			break;
		}
	  
		dbg("Getting MAC from SEEROM.");
	  
		catc_get_mac(catc, netdev->dev_addr);
		
		dbg("Setting MAC into registers.");
	  
		for (i = 0; i < 6; i++)
			catc_set_reg(catc, StationAddr0 - i, netdev->dev_addr[i]);
		
		dbg("Filling the multicast list.");
	  
		memset(broadcast, 0xff, 6);
		catc_multicast(broadcast, catc->multicast);
		catc_multicast(netdev->dev_addr, catc->multicast);
		catc_write_mem(catc, 0xfa80, catc->multicast, 64);
		
		dbg("Clearing error counters.");
		
		for (i = 0; i < 8; i++)
			catc_set_reg(catc, EthStats + i, 0);
		catc->last_stats = jiffies;
		
		dbg("Enabling.");
		
		catc_set_reg(catc, MaxBurst, RX_MAX_BURST);
		catc_set_reg(catc, OpModes, OpTxMerge | OpRxMerge | OpLenInclude | Op3MemWaits);
		catc_set_reg(catc, LEDCtrl, LEDLink);
		catc_set_reg(catc, RxUnit, RxEnable | RxPolarity | RxMultiCast);
	} else {
		dbg("Performing reset\n");
		catc_reset(catc);
		catc_get_mac(catc, netdev->dev_addr);
		
		dbg("Setting RX Mode");
		catc->rxmode[0] = RxEnable | RxPolarity | RxMultiCast;
		catc->rxmode[1] = 0;
		f5u011_rxmode(catc, catc->rxmode);
	}
	dbg("Init done.");
	printk(KERN_INFO "%s: %s USB Ethernet at usb-%s-%s, ",
	       netdev->name, (catc->is_f5u011) ? "Belkin F5U011" : "CATC EL1210A NetMate",
	       usbdev->bus->bus_name, usbdev->devpath);
	for (i = 0; i < 5; i++) printk("%2.2x:", netdev->dev_addr[i]);
	printk("%2.2x.\n", netdev->dev_addr[i]);
	usb_set_intfdata(intf, catc);

	SET_NETDEV_DEV(netdev, &intf->dev);
	if (register_netdev(netdev) != 0) {
		usb_set_intfdata(intf, NULL);
		usb_free_urb(catc->ctrl_urb);
		usb_free_urb(catc->tx_urb);
		usb_free_urb(catc->rx_urb);
		usb_free_urb(catc->irq_urb);
		free_netdev(netdev);
		return -EIO;
	}
	return 0;
}

static void catc_disconnect(struct usb_interface *intf)
{
	struct catc *catc = usb_get_intfdata(intf);

	usb_set_intfdata(intf, NULL);
	if (catc) {
		unregister_netdev(catc->netdev);
		usb_free_urb(catc->ctrl_urb);
		usb_free_urb(catc->tx_urb);
		usb_free_urb(catc->rx_urb);
		usb_free_urb(catc->irq_urb);
		free_netdev(catc->netdev);
	}
}

/*
 * Module functions and tables.
 */

static struct usb_device_id catc_id_table [] = {
	{ USB_DEVICE(0x0423, 0xa) },	/* CATC Netmate, Belkin F5U011 */
	{ USB_DEVICE(0x0423, 0xc) },	/* CATC Netmate II, Belkin F5U111 */
	{ USB_DEVICE(0x08d1, 0x1) },	/* smartBridges smartNIC */
	{ }
};

MODULE_DEVICE_TABLE(usb, catc_id_table);

static struct usb_driver catc_driver = {
	.name =		driver_name,
	.probe =	catc_probe,
	.disconnect =	catc_disconnect,
	.id_table =	catc_id_table,
};

static int __init catc_init(void)
{
	int result = usb_register(&catc_driver);
	if (result == 0)
		info(DRIVER_VERSION " " DRIVER_DESC);
	return result;
}

static void __exit catc_exit(void)
{
	usb_deregister(&catc_driver);
}

module_init(catc_init);
module_exit(catc_exit);