This source file includes following definitions.
- de600_read_status
- de600_read_byte
- de600_open
- de600_close
- get_stats
- trigger_interrupt
- de600_start_xmit
- de600_interrupt
- de600_tx_intr
- de600_rx_intr
- de600_probe
- adapter_init
- de600_rspace
- init_module
- cleanup_module
1 static char *version =
2 "de600.c: $Revision: 1.40 $, Bjorn Ekwall (bj0rn@blox.se)\n";
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42
43 #define DE600_SLOW_DOWN SLOW_DOWN_IO; SLOW_DOWN_IO; SLOW_DOWN_IO
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49
50 #define SLOW_IO_BY_JUMPING
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59 #define CHECK_LOST_DE600
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68
69 #define SHUTDOWN_WHEN_LOST
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81
82 #undef FAKE_SMALL_MAX
83
84
85 #ifdef DE600_DEBUG
86 #define PRINTK(x) if (de600_debug >= 2) printk x
87 #else
88 #define DE600_DEBUG 0
89 #define PRINTK(x)
90 #endif
91 unsigned int de600_debug = DE600_DEBUG;
92
93 #ifdef MODULE
94 #include <linux/module.h>
95 #include <linux/version.h>
96 #endif
97
98 #include <linux/kernel.h>
99 #include <linux/sched.h>
100 #include <linux/types.h>
101 #include <linux/fcntl.h>
102 #include <linux/string.h>
103 #include <linux/interrupt.h>
104 #include <linux/ioport.h>
105 #include <asm/io.h>
106 #include <linux/in.h>
107 #include <linux/ptrace.h>
108 #include <asm/system.h>
109 #include <linux/errno.h>
110
111 #include <linux/inet.h>
112 #include <linux/netdevice.h>
113 #include <linux/etherdevice.h>
114 #include <linux/skbuff.h>
115
116 #ifdef FAKE_SMALL_MAX
117 static unsigned long de600_rspace(struct sock *sk);
118 #include <net/sock.h>
119 #endif
120
121 #define netstats enet_statistics
122 typedef unsigned char byte;
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140
141 #ifndef DE600_IO
142 #define DE600_IO 0x378
143 #endif
144
145 #define DATA_PORT (DE600_IO)
146 #define STATUS_PORT (DE600_IO + 1)
147 #define COMMAND_PORT (DE600_IO + 2)
148
149 #ifndef DE600_IRQ
150 #define DE600_IRQ 7
151 #endif
152
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162
163
164 #define SELECT_NIC 0x04
165 #define SELECT_PRN 0x1c
166 #define NML_PRN 0xec
167 #define IRQEN 0x10
168
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171
172 #define RX_BUSY 0x80
173 #define RX_GOOD 0x40
174 #define TX_FAILED16 0x10
175 #define TX_BUSY 0x08
176
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180
181
182
183 #define WRITE_DATA 0x00
184 #define READ_DATA 0x01
185 #define STATUS 0x02
186 #define COMMAND 0x03
187 #define NULL_COMMAND 0x04
188 #define RX_LEN 0x05
189 #define TX_ADDR 0x06
190 #define RW_ADDR 0x07
191 #define HI_NIBBLE 0x08
192
193
194
195
196
197 #define RX_ALL 0x01
198 #define RX_BP 0x02
199 #define RX_MBP 0x03
200
201 #define TX_ENABLE 0x04
202 #define RX_ENABLE 0x08
203
204 #define RESET 0x80
205 #define STOP_RESET 0x00
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210
211 #define RX_PAGE2_SELECT 0x10
212 #define RX_BASE_PAGE 0x20
213 #define FLIP_IRQ 0x40
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225
226 #define MEM_2K 0x0800
227 #define MEM_4K 0x1000
228 #define MEM_6K 0x1800
229 #define NODE_ADDRESS 0x2000
230
231 #define RUNT 60
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242
243 static byte de600_read_status(struct device *dev);
244 static byte de600_read_byte(unsigned char type, struct device *dev);
245
246
247 static int de600_open(struct device *dev);
248 static int de600_close(struct device *dev);
249 static struct netstats *get_stats(struct device *dev);
250 static int de600_start_xmit(struct sk_buff *skb, struct device *dev);
251
252
253 static void de600_interrupt(int irq, struct pt_regs *regs);
254 static int de600_tx_intr(struct device *dev, int irq_status);
255 static void de600_rx_intr(struct device *dev);
256
257
258 static void trigger_interrupt(struct device *dev);
259 int de600_probe(struct device *dev);
260 static int adapter_init(struct device *dev);
261
262
263
264
265 static volatile int rx_page = 0;
266
267 #define TX_PAGES 2
268 static volatile int tx_fifo[TX_PAGES];
269 static volatile int tx_fifo_in = 0;
270 static volatile int tx_fifo_out = 0;
271 static volatile int free_tx_pages = TX_PAGES;
272 static int was_down = 0;
273
274
275
276
277
278 #define select_prn() outb_p(SELECT_PRN, COMMAND_PORT); DE600_SLOW_DOWN
279 #define select_nic() outb_p(SELECT_NIC, COMMAND_PORT); DE600_SLOW_DOWN
280
281
282 #define de600_put_byte(data) ( \
283 outb_p(((data) << 4) | WRITE_DATA , DATA_PORT), \
284 outb_p(((data) & 0xf0) | WRITE_DATA | HI_NIBBLE, DATA_PORT))
285
286
287
288
289
290 #define de600_put_command(cmd) ( \
291 outb_p(( rx_page << 4) | COMMAND , DATA_PORT), \
292 outb_p(( rx_page & 0xf0) | COMMAND | HI_NIBBLE, DATA_PORT), \
293 outb_p(((rx_page | cmd) << 4) | COMMAND , DATA_PORT), \
294 outb_p(((rx_page | cmd) & 0xf0) | COMMAND | HI_NIBBLE, DATA_PORT))
295
296 #define de600_setup_address(addr,type) ( \
297 outb_p((((addr) << 4) & 0xf0) | type , DATA_PORT), \
298 outb_p(( (addr) & 0xf0) | type | HI_NIBBLE, DATA_PORT), \
299 outb_p((((addr) >> 4) & 0xf0) | type , DATA_PORT), \
300 outb_p((((addr) >> 8) & 0xf0) | type | HI_NIBBLE, DATA_PORT))
301
302 #define rx_page_adr() ((rx_page & RX_PAGE2_SELECT)?(MEM_6K):(MEM_4K))
303
304
305 #define next_rx_page() (rx_page ^= RX_PAGE2_SELECT)
306
307 #define tx_page_adr(a) (((a) + 1) * MEM_2K)
308
309 static inline byte
310 de600_read_status(struct device *dev)
311 {
312 byte status;
313
314 outb_p(STATUS, DATA_PORT);
315 status = inb(STATUS_PORT);
316 outb_p(NULL_COMMAND | HI_NIBBLE, DATA_PORT);
317
318 return status;
319 }
320
321 static inline byte
322 de600_read_byte(unsigned char type, struct device *dev) {
323 byte lo;
324
325 (void)outb_p((type), DATA_PORT);
326 lo = ((unsigned char)inb(STATUS_PORT)) >> 4;
327 (void)outb_p((type) | HI_NIBBLE, DATA_PORT);
328 return ((unsigned char)inb(STATUS_PORT) & (unsigned char)0xf0) | lo;
329 }
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336
337
338
339 static int
340 de600_open(struct device *dev)
341 {
342 if (request_irq(DE600_IRQ, de600_interrupt, 0, "de600")) {
343 printk ("%s: unable to get IRQ %d\n", dev->name, DE600_IRQ);
344 return 1;
345 }
346 irq2dev_map[DE600_IRQ] = dev;
347
348 #ifdef MODULE
349 MOD_INC_USE_COUNT;
350 #endif
351 dev->start = 1;
352 if (adapter_init(dev)) {
353 return 1;
354 }
355
356 return 0;
357 }
358
359
360
361
362 static int
363 de600_close(struct device *dev)
364 {
365 select_nic();
366 rx_page = 0;
367 de600_put_command(RESET);
368 de600_put_command(STOP_RESET);
369 de600_put_command(0);
370 select_prn();
371
372 if (dev->start) {
373 free_irq(DE600_IRQ);
374 irq2dev_map[DE600_IRQ] = NULL;
375 dev->start = 0;
376 #ifdef MODULE
377 MOD_DEC_USE_COUNT;
378 #endif
379 }
380 return 0;
381 }
382
383 static struct netstats *
384 get_stats(struct device *dev)
385 {
386 return (struct netstats *)(dev->priv);
387 }
388
389 static inline void
390 trigger_interrupt(struct device *dev)
391 {
392 de600_put_command(FLIP_IRQ);
393 select_prn();
394 DE600_SLOW_DOWN;
395 select_nic();
396 de600_put_command(0);
397 }
398
399
400
401
402
403 static int
404 de600_start_xmit(struct sk_buff *skb, struct device *dev)
405 {
406 int transmit_from;
407 int len;
408 int tickssofar;
409 byte *buffer = skb->data;
410
411
412
413
414
415
416
417 if (skb == NULL) {
418 dev_tint(dev);
419 return 0;
420 }
421
422 if (free_tx_pages <= 0) {
423 tickssofar = jiffies - dev->trans_start;
424
425 if (tickssofar < 5)
426 return 1;
427
428
429 printk("%s: transmit timed out (%d), %s?\n",
430 dev->name,
431 tickssofar,
432 "network cable problem"
433 );
434
435 if (adapter_init(dev)) {
436 return 1;
437 }
438 }
439
440
441 PRINTK(("de600_start_xmit:len=%d, page %d/%d\n", skb->len, tx_fifo_in, free_tx_pages));
442
443 if ((len = skb->len) < RUNT)
444 len = RUNT;
445
446 cli();
447 select_nic();
448 tx_fifo[tx_fifo_in] = transmit_from = tx_page_adr(tx_fifo_in) - len;
449 tx_fifo_in = (tx_fifo_in + 1) % TX_PAGES;
450
451 #ifdef CHECK_LOST_DE600
452
453 de600_setup_address(NODE_ADDRESS, RW_ADDR);
454 de600_read_byte(READ_DATA, dev);
455 if (was_down || (de600_read_byte(READ_DATA, dev) != 0xde)) {
456 if (adapter_init(dev)) {
457 sti();
458 return 1;
459 }
460 }
461 #endif
462
463 de600_setup_address(transmit_from, RW_ADDR);
464 for ( ; len > 0; --len, ++buffer)
465 de600_put_byte(*buffer);
466
467 if (free_tx_pages-- == TX_PAGES) {
468 dev->trans_start = jiffies;
469 dev->tbusy = 0;
470
471 de600_setup_address(transmit_from, TX_ADDR);
472 de600_put_command(TX_ENABLE);
473 }
474 else {
475 dev->tbusy = !free_tx_pages;
476 select_prn();
477 }
478
479 sti();
480
481 #ifdef FAKE_SMALL_MAX
482
483 if (skb->sk && (skb->sk->protocol == IPPROTO_TCP) &&
484 (skb->sk->prot->rspace != &de600_rspace))
485 skb->sk->prot->rspace = de600_rspace;
486 #endif
487
488 dev_kfree_skb (skb, FREE_WRITE);
489
490 return 0;
491 }
492
493
494
495
496
497 static void
498 de600_interrupt(int irq, struct pt_regs * regs)
499 {
500 struct device *dev = irq2dev_map[irq];
501 byte irq_status;
502 int retrig = 0;
503 int boguscount = 0;
504
505
506 if ((dev == NULL) || (dev->start == 0) || (DE600_IRQ != irq)) {
507 printk("%s: bogus interrupt %d\n", dev?dev->name:"DE-600", irq);
508 return;
509 }
510
511 dev->interrupt = 1;
512 select_nic();
513 irq_status = de600_read_status(dev);
514
515 do {
516 PRINTK(("de600_interrupt (%02X)\n", irq_status));
517
518 if (irq_status & RX_GOOD)
519 de600_rx_intr(dev);
520 else if (!(irq_status & RX_BUSY))
521 de600_put_command(RX_ENABLE);
522
523
524 if (free_tx_pages < TX_PAGES)
525 retrig = de600_tx_intr(dev, irq_status);
526 else
527 retrig = 0;
528
529 irq_status = de600_read_status(dev);
530 } while ( (irq_status & RX_GOOD) || ((++boguscount < 100) && retrig) );
531
532
533
534
535
536
537
538 dev->interrupt = 0;
539 select_prn();
540
541 if (retrig)
542 trigger_interrupt(dev);
543
544 sti();
545 return;
546 }
547
548 static int
549 de600_tx_intr(struct device *dev, int irq_status)
550 {
551
552
553
554
555 mark_bh(NET_BH);
556
557 if (irq_status & TX_BUSY)
558 return 1;
559
560
561
562 if (!(irq_status & TX_FAILED16)) {
563 tx_fifo_out = (tx_fifo_out + 1) % TX_PAGES;
564 ++free_tx_pages;
565 ((struct netstats *)(dev->priv))->tx_packets++;
566 dev->tbusy = 0;
567 }
568
569
570 if ((free_tx_pages < TX_PAGES) || (irq_status & TX_FAILED16)) {
571 dev->trans_start = jiffies;
572 de600_setup_address(tx_fifo[tx_fifo_out], TX_ADDR);
573 de600_put_command(TX_ENABLE);
574 return 1;
575 }
576
577
578 return 0;
579 }
580
581
582
583
584 static void
585 de600_rx_intr(struct device *dev)
586 {
587 struct sk_buff *skb;
588 int i;
589 int read_from;
590 int size;
591 register unsigned char *buffer;
592
593 cli();
594
595 size = de600_read_byte(RX_LEN, dev);
596 size += (de600_read_byte(RX_LEN, dev) << 8);
597 size -= 4;
598
599
600 read_from = rx_page_adr();
601 next_rx_page();
602 de600_put_command(RX_ENABLE);
603 sti();
604
605 if ((size < 32) || (size > 1535)) {
606 printk("%s: Bogus packet size %d.\n", dev->name, size);
607 if (size > 10000)
608 adapter_init(dev);
609 return;
610 }
611
612 skb = dev_alloc_skb(size+2);
613 sti();
614 if (skb == NULL) {
615 printk("%s: Couldn't allocate a sk_buff of size %d.\n",
616 dev->name, size);
617 return;
618 }
619
620
621 skb->dev = dev;
622 skb_reserve(skb,2);
623
624
625 buffer = skb_put(skb,size);
626
627
628 de600_setup_address(read_from, RW_ADDR);
629 for (i = size; i > 0; --i, ++buffer)
630 *buffer = de600_read_byte(READ_DATA, dev);
631
632 ((struct netstats *)(dev->priv))->rx_packets++;
633
634 skb->protocol=eth_type_trans(skb,dev);
635
636 netif_rx(skb);
637
638
639
640
641
642 }
643
644 int
645 de600_probe(struct device *dev)
646 {
647 int i;
648 static struct netstats de600_netstats;
649
650
651 printk("%s: D-Link DE-600 pocket adapter", dev->name);
652
653 if (de600_debug > 1)
654 printk(version);
655
656
657 rx_page = 0;
658 select_nic();
659 (void)de600_read_status(dev);
660 de600_put_command(RESET);
661 de600_put_command(STOP_RESET);
662 if (de600_read_status(dev) & 0xf0) {
663 printk(": not at I/O %#3x.\n", DATA_PORT);
664 return ENODEV;
665 }
666
667
668
669
670
671
672
673 de600_setup_address(NODE_ADDRESS, RW_ADDR);
674 for (i = 0; i < ETH_ALEN; i++) {
675 dev->dev_addr[i] = de600_read_byte(READ_DATA, dev);
676 dev->broadcast[i] = 0xff;
677 }
678
679
680 if ((dev->dev_addr[1] == 0xde) && (dev->dev_addr[2] == 0x15)) {
681
682 dev->dev_addr[0] = 0x00;
683 dev->dev_addr[1] = 0x80;
684 dev->dev_addr[2] = 0xc8;
685 dev->dev_addr[3] &= 0x0f;
686 dev->dev_addr[3] |= 0x70;
687 } else {
688 printk(" not identified in the printer port\n");
689 return ENODEV;
690 }
691
692 #if 0
693 if (check_region(DE600_IO, 3)) {
694 printk(", port 0x%x busy\n", DE600_IO);
695 return EBUSY;
696 }
697 #endif
698 request_region(DE600_IO, 3, "de600");
699
700 printk(", Ethernet Address: %02X", dev->dev_addr[0]);
701 for (i = 1; i < ETH_ALEN; i++)
702 printk(":%02X",dev->dev_addr[i]);
703 printk("\n");
704
705
706
707 dev->priv = &de600_netstats;
708
709 memset(dev->priv, 0, sizeof(struct netstats));
710 dev->get_stats = get_stats;
711
712 dev->open = de600_open;
713 dev->stop = de600_close;
714 dev->hard_start_xmit = &de600_start_xmit;
715
716 ether_setup(dev);
717
718 select_prn();
719 return 0;
720 }
721
722 static int
723 adapter_init(struct device *dev)
724 {
725 int i;
726 long flags;
727
728 save_flags(flags);
729 cli();
730
731 select_nic();
732 rx_page = 0;
733 de600_put_command(RESET);
734 de600_put_command(STOP_RESET);
735 #ifdef CHECK_LOST_DE600
736
737
738 de600_setup_address(NODE_ADDRESS, RW_ADDR);
739 de600_read_byte(READ_DATA, dev);
740 if ((de600_read_byte(READ_DATA, dev) != 0xde) ||
741 (de600_read_byte(READ_DATA, dev) != 0x15)) {
742
743 printk("Something has happened to the DE-600! Please check it"
744 #ifdef SHUTDOWN_WHEN_LOST
745 " and do a new ifconfig"
746 #endif
747 "!\n");
748 #ifdef SHUTDOWN_WHEN_LOST
749
750 dev->flags &= ~IFF_UP;
751 de600_close(dev);
752 #endif
753 was_down = 1;
754 dev->tbusy = 1;
755 return 1;
756 }
757 #endif
758 if (was_down) {
759 printk("Thanks, I feel much better now!\n");
760 was_down = 0;
761 }
762
763 dev->tbusy = 0;
764 dev->interrupt = 0;
765 tx_fifo_in = 0;
766 tx_fifo_out = 0;
767 free_tx_pages = TX_PAGES;
768
769
770 de600_setup_address(NODE_ADDRESS, RW_ADDR);
771 for (i = 0; i < ETH_ALEN; i++)
772 de600_put_byte(dev->dev_addr[i]);
773
774
775 rx_page = RX_BP | RX_BASE_PAGE;
776 de600_setup_address(MEM_4K, RW_ADDR);
777
778 de600_put_command(RX_ENABLE);
779 select_prn();
780 restore_flags(flags);
781
782 return 0;
783 }
784
785 #ifdef FAKE_SMALL_MAX
786
787
788
789 #define DE600_MIN_WINDOW 1024
790 #define DE600_MAX_WINDOW 2048
791 #define DE600_TCP_WINDOW_DIFF 1024
792
793
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808
809 #define min(a,b) ((a)<(b)?(a):(b))
810 static unsigned long
811 de600_rspace(struct sock *sk)
812 {
813 int amt;
814
815 if (sk != NULL) {
816
817
818
819
820
821
822 if (sk->rmem_alloc >= sk->rcvbuf-2*DE600_MIN_WINDOW) return(0);
823 amt = min((sk->rcvbuf-sk->rmem_alloc)/2, DE600_MAX_WINDOW);
824 if (amt < 0) return(0);
825 return(amt);
826 }
827 return(0);
828 }
829 #endif
830
831 #ifdef MODULE
832 char kernel_version[] = UTS_RELEASE;
833 static char nullname[8];
834 static struct device de600_dev = {
835 nullname, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, de600_probe };
836
837 int
838 init_module(void)
839 {
840 if (register_netdev(&de600_dev) != 0)
841 return -EIO;
842 return 0;
843 }
844
845 void
846 cleanup_module(void)
847 {
848 unregister_netdev(&de600_dev);
849 release_region(DE600_IO, 3);
850 }
851 #endif