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41static const char version[] =
42 "de620.c: $Revision: 1.40 $, Bjorn Ekwall <bj0rn@blox.se>\n";
43
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71
72#define DE620_CLONE 0
73
74
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80
81
82
83#ifndef READ_DELAY
84#define READ_DELAY 100
85#endif
86
87#ifndef WRITE_DELAY
88#define WRITE_DELAY 100
89#endif
90
91
92
93
94
95
96
97
98
99
100#ifdef LOWSPEED
101
102
103
104
105
106
107#endif
108
109#include <linux/module.h>
110#include <linux/kernel.h>
111#include <linux/types.h>
112#include <linux/fcntl.h>
113#include <linux/string.h>
114#include <linux/interrupt.h>
115#include <linux/ioport.h>
116#include <linux/in.h>
117#include <linux/errno.h>
118#include <linux/init.h>
119#include <linux/inet.h>
120#include <linux/netdevice.h>
121#include <linux/etherdevice.h>
122#include <linux/skbuff.h>
123
124#include <asm/io.h>
125#include <asm/system.h>
126
127
128#include "de620.h"
129
130typedef unsigned char byte;
131
132
133
134
135
136
137
138#ifndef DE620_IO
139#define DE620_IO 0x378
140#endif
141
142#ifndef DE620_IRQ
143#define DE620_IRQ 7
144#endif
145
146#define DATA_PORT (dev->base_addr)
147#define STATUS_PORT (dev->base_addr + 1)
148#define COMMAND_PORT (dev->base_addr + 2)
149
150#define RUNT 60
151#define GIANT 1514
152
153
154
155
156
157
158
159
160
161
162
163
164
165static int bnc;
166static int utp;
167static int io = DE620_IO;
168static int irq = DE620_IRQ;
169static int clone = DE620_CLONE;
170
171static spinlock_t de620_lock;
172
173module_param(bnc, int, 0);
174module_param(utp, int, 0);
175module_param(io, int, 0);
176module_param(irq, int, 0);
177module_param(clone, int, 0);
178MODULE_PARM_DESC(bnc, "DE-620 set BNC medium (0-1)");
179MODULE_PARM_DESC(utp, "DE-620 set UTP medium (0-1)");
180MODULE_PARM_DESC(io, "DE-620 I/O base address,required");
181MODULE_PARM_DESC(irq, "DE-620 IRQ number,required");
182MODULE_PARM_DESC(clone, "Check also for non-D-Link DE-620 clones (0-1)");
183
184
185
186
187
188
189
190
191
192
193
194
195static int de620_open(struct net_device *);
196static int de620_close(struct net_device *);
197static void de620_set_multicast_list(struct net_device *);
198static int de620_start_xmit(struct sk_buff *, struct net_device *);
199
200
201static irqreturn_t de620_interrupt(int, void *);
202static int de620_rx_intr(struct net_device *);
203
204
205static int adapter_init(struct net_device *);
206static int read_eeprom(struct net_device *);
207
208
209
210
211
212#define SCR_DEF NIBBLEMODE |INTON | SLEEP | AUTOTX
213#define TCR_DEF RXPB
214#define DE620_RX_START_PAGE 12
215#define DEF_NIC_CMD IRQEN | ICEN | DS1
216
217static volatile byte NIC_Cmd;
218static volatile byte next_rx_page;
219static byte first_rx_page;
220static byte last_rx_page;
221static byte EIPRegister;
222
223static struct nic {
224 byte NodeID[6];
225 byte RAM_Size;
226 byte Model;
227 byte Media;
228 byte SCR;
229} nic_data;
230
231
232
233
234
235
236#define de620_tx_buffs(dd) (inb(STATUS_PORT) & (TXBF0 | TXBF1))
237#define de620_flip_ds(dd) NIC_Cmd ^= DS0 | DS1; outb(NIC_Cmd, COMMAND_PORT);
238
239
240#ifdef COUNT_LOOPS
241static int tot_cnt;
242#endif
243static inline byte
244de620_ready(struct net_device *dev)
245{
246 byte value;
247 register short int cnt = 0;
248
249 while ((((value = inb(STATUS_PORT)) & READY) == 0) && (cnt <= 1000))
250 ++cnt;
251
252#ifdef COUNT_LOOPS
253 tot_cnt += cnt;
254#endif
255 return value & 0xf0;
256}
257
258static inline void
259de620_send_command(struct net_device *dev, byte cmd)
260{
261 de620_ready(dev);
262 if (cmd == W_DUMMY)
263 outb(NIC_Cmd, COMMAND_PORT);
264
265 outb(cmd, DATA_PORT);
266
267 outb(NIC_Cmd ^ CS0, COMMAND_PORT);
268 de620_ready(dev);
269 outb(NIC_Cmd, COMMAND_PORT);
270}
271
272static inline void
273de620_put_byte(struct net_device *dev, byte value)
274{
275
276 de620_ready(dev);
277 outb(value, DATA_PORT);
278 de620_flip_ds(dev);
279}
280
281static inline byte
282de620_read_byte(struct net_device *dev)
283{
284 byte value;
285
286
287 value = de620_ready(dev);
288 de620_flip_ds(dev);
289 value |= de620_ready(dev) >> 4;
290 return value;
291}
292
293static inline void
294de620_write_block(struct net_device *dev, byte *buffer, int count, int pad)
295{
296#ifndef LOWSPEED
297 byte uflip = NIC_Cmd ^ (DS0 | DS1);
298 byte dflip = NIC_Cmd;
299#else
300#ifdef COUNT_LOOPS
301 int bytes = count;
302#endif
303#endif
304
305#ifdef LOWSPEED
306#ifdef COUNT_LOOPS
307 tot_cnt = 0;
308#endif
309
310 for ( ; count > 0; --count, ++buffer) {
311 de620_put_byte(dev,*buffer);
312 }
313 for ( count = pad ; count > 0; --count, ++buffer) {
314 de620_put_byte(dev, 0);
315 }
316 de620_send_command(dev,W_DUMMY);
317#ifdef COUNT_LOOPS
318
319 printk("WRITE(%d)\n", tot_cnt/((bytes?bytes:1)));
320#endif
321#else
322 for ( ; count > 0; count -=2) {
323 outb(*buffer++, DATA_PORT);
324 outb(uflip, COMMAND_PORT);
325 outb(*buffer++, DATA_PORT);
326 outb(dflip, COMMAND_PORT);
327 }
328 de620_send_command(dev,W_DUMMY);
329#endif
330}
331
332static inline void
333de620_read_block(struct net_device *dev, byte *data, int count)
334{
335#ifndef LOWSPEED
336 byte value;
337 byte uflip = NIC_Cmd ^ (DS0 | DS1);
338 byte dflip = NIC_Cmd;
339#else
340#ifdef COUNT_LOOPS
341 int bytes = count;
342
343 tot_cnt = 0;
344#endif
345#endif
346
347#ifdef LOWSPEED
348
349 while (count-- > 0) {
350 *data++ = de620_read_byte(dev);
351 de620_flip_ds(dev);
352 }
353#ifdef COUNT_LOOPS
354
355 printk("READ(%d)\n", tot_cnt/(2*(bytes?bytes:1)));
356#endif
357#else
358 while (count-- > 0) {
359 value = inb(STATUS_PORT) & 0xf0;
360 outb(uflip, COMMAND_PORT);
361 *data++ = value | inb(STATUS_PORT) >> 4;
362 outb(dflip , COMMAND_PORT);
363 }
364#endif
365}
366
367static inline void
368de620_set_delay(struct net_device *dev)
369{
370 de620_ready(dev);
371 outb(W_DFR, DATA_PORT);
372 outb(NIC_Cmd ^ CS0, COMMAND_PORT);
373
374 de620_ready(dev);
375#ifdef LOWSPEED
376 outb(WRITE_DELAY, DATA_PORT);
377#else
378 outb(0, DATA_PORT);
379#endif
380 de620_flip_ds(dev);
381
382 de620_ready(dev);
383#ifdef LOWSPEED
384 outb(READ_DELAY, DATA_PORT);
385#else
386 outb(0, DATA_PORT);
387#endif
388 de620_flip_ds(dev);
389}
390
391static inline void
392de620_set_register(struct net_device *dev, byte reg, byte value)
393{
394 de620_ready(dev);
395 outb(reg, DATA_PORT);
396 outb(NIC_Cmd ^ CS0, COMMAND_PORT);
397
398 de620_put_byte(dev, value);
399}
400
401static inline byte
402de620_get_register(struct net_device *dev, byte reg)
403{
404 byte value;
405
406 de620_send_command(dev,reg);
407 value = de620_read_byte(dev);
408 de620_send_command(dev,W_DUMMY);
409
410 return value;
411}
412
413
414
415
416
417
418
419
420
421
422static int de620_open(struct net_device *dev)
423{
424 int ret = request_irq(dev->irq, de620_interrupt, 0, dev->name, dev);
425 if (ret) {
426 printk (KERN_ERR "%s: unable to get IRQ %d\n", dev->name, dev->irq);
427 return ret;
428 }
429
430 if (adapter_init(dev)) {
431 ret = -EIO;
432 goto out_free_irq;
433 }
434
435 netif_start_queue(dev);
436 return 0;
437
438out_free_irq:
439 free_irq(dev->irq, dev);
440 return ret;
441}
442
443
444
445
446
447
448
449static int de620_close(struct net_device *dev)
450{
451 netif_stop_queue(dev);
452
453 de620_set_register(dev, W_TCR, RXOFF);
454 free_irq(dev->irq, dev);
455 return 0;
456}
457
458
459
460
461
462
463
464
465static void de620_set_multicast_list(struct net_device *dev)
466{
467 if (dev->mc_count || dev->flags&(IFF_ALLMULTI|IFF_PROMISC))
468 {
469 de620_set_register(dev, W_TCR, (TCR_DEF & ~RXPBM) | RXALL);
470 }
471 else
472 {
473 de620_set_register(dev, W_TCR, TCR_DEF);
474 }
475}
476
477
478
479
480
481
482static void de620_timeout(struct net_device *dev)
483{
484 printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name, "network cable problem");
485
486 if (!adapter_init(dev))
487 netif_wake_queue(dev);
488}
489
490
491
492
493
494
495static int de620_start_xmit(struct sk_buff *skb, struct net_device *dev)
496{
497 unsigned long flags;
498 int len;
499 byte *buffer = skb->data;
500 byte using_txbuf;
501
502 using_txbuf = de620_tx_buffs(dev);
503
504 netif_stop_queue(dev);
505
506
507 if ((len = skb->len) < RUNT)
508 len = RUNT;
509 if (len & 1)
510 ++len;
511
512
513
514 spin_lock_irqsave(&de620_lock, flags);
515 pr_debug("de620_start_xmit: len=%d, bufs 0x%02x\n",
516 (int)skb->len, using_txbuf);
517
518
519 switch (using_txbuf) {
520 default:
521 case TXBF1:
522 de620_send_command(dev,W_CR | RW0);
523 using_txbuf |= TXBF0;
524 break;
525
526 case TXBF0:
527 de620_send_command(dev,W_CR | RW1);
528 using_txbuf |= TXBF1;
529 break;
530
531 case (TXBF0 | TXBF1):
532 printk(KERN_WARNING "%s: No tx-buffer available!\n", dev->name);
533 spin_unlock_irqrestore(&de620_lock, flags);
534 return NETDEV_TX_BUSY;
535 }
536 de620_write_block(dev, buffer, skb->len, len-skb->len);
537
538 dev->trans_start = jiffies;
539 if(!(using_txbuf == (TXBF0 | TXBF1)))
540 netif_wake_queue(dev);
541
542 dev->stats.tx_packets++;
543 spin_unlock_irqrestore(&de620_lock, flags);
544 dev_kfree_skb (skb);
545 return NETDEV_TX_OK;
546}
547
548
549
550
551
552
553static irqreturn_t
554de620_interrupt(int irq_in, void *dev_id)
555{
556 struct net_device *dev = dev_id;
557 byte irq_status;
558 int bogus_count = 0;
559 int again = 0;
560
561 spin_lock(&de620_lock);
562
563
564 irq_status = de620_get_register(dev, R_STS);
565
566 pr_debug("de620_interrupt (%2.2X)\n", irq_status);
567
568 if (irq_status & RXGOOD) {
569 do {
570 again = de620_rx_intr(dev);
571 pr_debug("again=%d\n", again);
572 }
573 while (again && (++bogus_count < 100));
574 }
575
576 if(de620_tx_buffs(dev) != (TXBF0 | TXBF1))
577 netif_wake_queue(dev);
578
579 spin_unlock(&de620_lock);
580 return IRQ_HANDLED;
581}
582
583
584
585
586
587
588
589
590static int de620_rx_intr(struct net_device *dev)
591{
592 struct header_buf {
593 byte status;
594 byte Rx_NextPage;
595 unsigned short Rx_ByteCount;
596 } header_buf;
597 struct sk_buff *skb;
598 int size;
599 byte *buffer;
600 byte pagelink;
601 byte curr_page;
602
603 pr_debug("de620_rx_intr: next_rx_page = %d\n", next_rx_page);
604
605
606 de620_send_command(dev, W_CR | RRN);
607 de620_set_register(dev, W_RSA1, next_rx_page);
608 de620_set_register(dev, W_RSA0, 0);
609
610
611 de620_read_block(dev, (byte *)&header_buf, sizeof(struct header_buf));
612 pr_debug("page status=0x%02x, nextpage=%d, packetsize=%d\n",
613 header_buf.status, header_buf.Rx_NextPage,
614 header_buf.Rx_ByteCount);
615
616
617 pagelink = header_buf.Rx_NextPage;
618 if ((pagelink < first_rx_page) || (last_rx_page < pagelink)) {
619
620 printk(KERN_WARNING "%s: Ring overrun? Restoring...\n", dev->name);
621
622 adapter_init(dev);
623 netif_wake_queue(dev);
624 dev->stats.rx_over_errors++;
625 return 0;
626 }
627
628
629
630 pagelink = next_rx_page +
631 ((header_buf.Rx_ByteCount + (4 - 1 + 0x100)) >> 8);
632
633
634 if (pagelink > last_rx_page)
635 pagelink -= (last_rx_page - first_rx_page + 1);
636
637
638 if (pagelink != header_buf.Rx_NextPage) {
639
640 printk(KERN_WARNING "%s: Page link out of sync! Restoring...\n", dev->name);
641 next_rx_page = header_buf.Rx_NextPage;
642 de620_send_command(dev, W_DUMMY);
643 de620_set_register(dev, W_NPRF, next_rx_page);
644 dev->stats.rx_over_errors++;
645 return 0;
646 }
647 next_rx_page = pagelink;
648
649 size = header_buf.Rx_ByteCount - 4;
650 if ((size < RUNT) || (GIANT < size)) {
651 printk(KERN_WARNING "%s: Illegal packet size: %d!\n", dev->name, size);
652 }
653 else {
654 skb = dev_alloc_skb(size+2);
655 if (skb == NULL) {
656 printk(KERN_WARNING "%s: Couldn't allocate a sk_buff of size %d.\n", dev->name, size);
657 dev->stats.rx_dropped++;
658 }
659 else {
660 skb_reserve(skb,2);
661
662 buffer = skb_put(skb,size);
663
664 de620_read_block(dev, buffer, size);
665 pr_debug("Read %d bytes\n", size);
666 skb->protocol=eth_type_trans(skb,dev);
667 netif_rx(skb);
668
669 dev->stats.rx_packets++;
670 dev->stats.rx_bytes += size;
671 }
672 }
673
674
675
676 curr_page = de620_get_register(dev, R_CPR);
677 de620_set_register(dev, W_NPRF, next_rx_page);
678 pr_debug("next_rx_page=%d CPR=%d\n", next_rx_page, curr_page);
679
680 return (next_rx_page != curr_page);
681}
682
683
684
685
686
687
688static int adapter_init(struct net_device *dev)
689{
690 int i;
691 static int was_down;
692
693 if ((nic_data.Model == 3) || (nic_data.Model == 0)) {
694 EIPRegister = NCTL0;
695 if (nic_data.Media != 1)
696 EIPRegister |= NIS0;
697 }
698 else if (nic_data.Model == 2) {
699 EIPRegister = NCTL0 | NIS0;
700 }
701
702 if (utp)
703 EIPRegister = NCTL0 | NIS0;
704 if (bnc)
705 EIPRegister = NCTL0;
706
707 de620_send_command(dev, W_CR | RNOP | CLEAR);
708 de620_send_command(dev, W_CR | RNOP);
709
710 de620_set_register(dev, W_SCR, SCR_DEF);
711
712 de620_set_register(dev, W_TCR, RXOFF);
713
714
715 for (i = 0; i < 6; ++i) {
716 de620_set_register(dev, W_PAR0 + i, dev->dev_addr[i]);
717 }
718
719 de620_set_register(dev, W_EIP, EIPRegister);
720
721 next_rx_page = first_rx_page = DE620_RX_START_PAGE;
722 if (nic_data.RAM_Size)
723 last_rx_page = nic_data.RAM_Size - 1;
724 else
725 last_rx_page = 255;
726
727 de620_set_register(dev, W_SPR, first_rx_page);
728 de620_set_register(dev, W_EPR, last_rx_page);
729 de620_set_register(dev, W_CPR, first_rx_page);
730 de620_send_command(dev, W_NPR | first_rx_page);
731 de620_send_command(dev, W_DUMMY);
732 de620_set_delay(dev);
733
734
735
736#define CHECK_MASK ( 0 | TXSUC | T16 | 0 | RXCRC | RXSHORT | 0 | 0 )
737#define CHECK_OK ( 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 )
738
739
740
741 if (((i = de620_get_register(dev, R_STS)) & CHECK_MASK) != CHECK_OK) {
742 printk(KERN_ERR "%s: Something has happened to the DE-620! Please check it"
743#ifdef SHUTDOWN_WHEN_LOST
744 " and do a new ifconfig"
745#endif
746 "! (%02x)\n", dev->name, i);
747#ifdef SHUTDOWN_WHEN_LOST
748
749 dev->flags &= ~IFF_UP;
750 de620_close(dev);
751#endif
752 was_down = 1;
753 return 1;
754 }
755 if (was_down) {
756 printk(KERN_WARNING "%s: Thanks, I feel much better now!\n", dev->name);
757 was_down = 0;
758 }
759
760
761 de620_set_register(dev, W_TCR, TCR_DEF);
762
763 return 0;
764}
765
766static const struct net_device_ops de620_netdev_ops = {
767 .ndo_open = de620_open,
768 .ndo_stop = de620_close,
769 .ndo_start_xmit = de620_start_xmit,
770 .ndo_tx_timeout = de620_timeout,
771 .ndo_set_multicast_list = de620_set_multicast_list,
772 .ndo_change_mtu = eth_change_mtu,
773 .ndo_set_mac_address = eth_mac_addr,
774 .ndo_validate_addr = eth_validate_addr,
775};
776
777
778
779
780
781
782
783
784
785
786struct net_device * __init de620_probe(int unit)
787{
788 byte checkbyte = 0xa5;
789 struct net_device *dev;
790 int err = -ENOMEM;
791 int i;
792
793 dev = alloc_etherdev(0);
794 if (!dev)
795 goto out;
796
797 spin_lock_init(&de620_lock);
798
799
800
801
802
803 dev->base_addr = io;
804 dev->irq = irq;
805
806
807 if (unit >= 0) {
808 sprintf(dev->name, "eth%d", unit);
809 netdev_boot_setup_check(dev);
810 }
811
812 pr_debug("%s", version);
813
814 printk(KERN_INFO "D-Link DE-620 pocket adapter");
815
816 if (!request_region(dev->base_addr, 3, "de620")) {
817 printk(" io 0x%3lX, which is busy.\n", dev->base_addr);
818 err = -EBUSY;
819 goto out1;
820 }
821
822
823 NIC_Cmd = DEF_NIC_CMD;
824 de620_set_register(dev, W_EIP, EIPRegister);
825
826
827 de620_set_register(dev, W_CPR, checkbyte);
828 checkbyte = de620_get_register(dev, R_CPR);
829
830 if ((checkbyte != 0xa5) || (read_eeprom(dev) != 0)) {
831 printk(" not identified in the printer port\n");
832 err = -ENODEV;
833 goto out2;
834 }
835
836
837 dev->dev_addr[0] = nic_data.NodeID[0];
838 for (i = 1; i < ETH_ALEN; i++) {
839 dev->dev_addr[i] = nic_data.NodeID[i];
840 dev->broadcast[i] = 0xff;
841 }
842
843 printk(", Ethernet Address: %pM", dev->dev_addr);
844
845 printk(" (%dk RAM,",
846 (nic_data.RAM_Size) ? (nic_data.RAM_Size >> 2) : 64);
847
848 if (nic_data.Media == 1)
849 printk(" BNC)\n");
850 else
851 printk(" UTP)\n");
852
853 dev->netdev_ops = &de620_netdev_ops;
854 dev->watchdog_timeo = HZ*2;
855
856
857
858
859 pr_debug("\nEEPROM contents:\n"
860 "RAM_Size = 0x%02X\n"
861 "NodeID = %pM\n"
862 "Model = %d\n"
863 "Media = %d\n"
864 "SCR = 0x%02x\n", nic_data.RAM_Size, nic_data.NodeID,
865 nic_data.Model, nic_data.Media, nic_data.SCR);
866
867 err = register_netdev(dev);
868 if (err)
869 goto out2;
870 return dev;
871
872out2:
873 release_region(dev->base_addr, 3);
874out1:
875 free_netdev(dev);
876out:
877 return ERR_PTR(err);
878}
879
880
881
882
883
884
885
886#define sendit(dev,data) de620_set_register(dev, W_EIP, data | EIPRegister);
887
888static unsigned short __init ReadAWord(struct net_device *dev, int from)
889{
890 unsigned short data;
891 int nbits;
892
893
894
895
896 sendit(dev, 0); sendit(dev, 1); sendit(dev, 5); sendit(dev, 4);
897
898
899 for (nbits = 9; nbits > 0; --nbits, from <<= 1) {
900 if (from & 0x0100) {
901
902
903
904 sendit(dev, 6); sendit(dev, 7); sendit(dev, 7); sendit(dev, 6);
905 }
906 else {
907
908
909
910 sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4);
911 }
912 }
913
914
915 for (data = 0, nbits = 16; nbits > 0; --nbits) {
916
917
918
919 sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4);
920 data = (data << 1) | ((de620_get_register(dev, R_STS) & EEDI) >> 7);
921 }
922
923
924
925 sendit(dev, 0); sendit(dev, 1); sendit(dev, 1); sendit(dev, 0);
926
927 return data;
928}
929
930static int __init read_eeprom(struct net_device *dev)
931{
932 unsigned short wrd;
933
934
935 wrd = ReadAWord(dev, 0x1aa);
936 if (!clone && (wrd != htons(0x0080)))
937 return -1;
938 nic_data.NodeID[0] = wrd & 0xff;
939 nic_data.NodeID[1] = wrd >> 8;
940
941 wrd = ReadAWord(dev, 0x1ab);
942 if (!clone && ((wrd & 0xff) != 0xc8))
943 return -1;
944 nic_data.NodeID[2] = wrd & 0xff;
945 nic_data.NodeID[3] = wrd >> 8;
946
947 wrd = ReadAWord(dev, 0x1ac);
948 nic_data.NodeID[4] = wrd & 0xff;
949 nic_data.NodeID[5] = wrd >> 8;
950
951 wrd = ReadAWord(dev, 0x1ad);
952 nic_data.RAM_Size = (wrd >> 8);
953
954 wrd = ReadAWord(dev, 0x1ae);
955 nic_data.Model = (wrd & 0xff);
956
957 wrd = ReadAWord(dev, 0x1af);
958 nic_data.Media = (wrd & 0xff);
959
960 wrd = ReadAWord(dev, 0x1a8);
961 nic_data.SCR = (wrd >> 8);
962
963 return 0;
964}
965
966
967
968
969
970
971#ifdef MODULE
972static struct net_device *de620_dev;
973
974int __init init_module(void)
975{
976 de620_dev = de620_probe(-1);
977 if (IS_ERR(de620_dev))
978 return PTR_ERR(de620_dev);
979 return 0;
980}
981
982void cleanup_module(void)
983{
984 unregister_netdev(de620_dev);
985 release_region(de620_dev->base_addr, 3);
986 free_netdev(de620_dev);
987}
988#endif
989MODULE_LICENSE("GPL");
990