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Import 2.3.18pre1
[davej-history.git] / drivers / net / ni65.c
blobfc24bd1ee4f7063c8e4dcca7b304658ec6265cfa
1 /*
2 * ni6510 (am7990 'lance' chip) driver for Linux-net-3
3 * BETAcode v0.71 (96/09/29) for 2.0.0 (or later)
4 * copyrights (c) 1994,1995,1996 by M.Hipp
5 *
6 * This driver can handle the old ni6510 board and the newer ni6510
7 * EtherBlaster. (probably it also works with every full NE2100
8 * compatible card)
9 *
10 * To compile as module, type:
11 * gcc -O2 -fomit-frame-pointer -m486 -D__KERNEL__ -DMODULE -c ni65.c
12 * driver probes: io: 0x360,0x300,0x320,0x340 / dma: 3,5,6,7
13 *
14 * This is an extension to the Linux operating system, and is covered by the
15 * same Gnu Public License that covers the Linux-kernel.
16 *
17 * comments/bugs/suggestions can be sent to:
18 * Michael Hipp
19 * email: hippm@informatik.uni-tuebingen.de
20 *
21 * sources:
22 * some things are from the 'ni6510-packet-driver for dos by Russ Nelson'
23 * and from the original drivers by D.Becker
24 *
25 * known problems:
26 * - on some PCI boards (including my own) the card/board/ISA-bridge has
27 * problems with bus master DMA. This results in lotsa overruns.
28 * It may help to '#define RCV_PARANOIA_CHECK' or try to #undef
29 * the XMT and RCV_VIA_SKB option .. this reduces driver performance.
30 * Or just play with your BIOS options to optimize ISA-DMA access.
31 * Maybe you also wanna play with the LOW_PERFORAMCE and MID_PERFORMANCE
32 * defines -> please report me your experience then
33 * - Harald reported for ASUS SP3G mainboards, that you should use
34 * the 'optimal settings' from the user's manual on page 3-12!
35 *
36 * credits:
37 * thanx to Jason Sullivan for sending me a ni6510 card!
38 * lot of debug runs with ASUS SP3G Boards (Intel Saturn) by Harald Koenig
39 *
40 * simple performance test: (486DX-33/Ni6510-EB receives from 486DX4-100/Ni6510-EB)
41 * average: FTP -> 8384421 bytes received in 8.5 seconds
42 * (no RCV_VIA_SKB,no XMT_VIA_SKB,PARANOIA_CHECK,4 XMIT BUFS, 8 RCV_BUFFS)
43 * peak: FTP -> 8384421 bytes received in 7.5 seconds
44 * (RCV_VIA_SKB,XMT_VIA_SKB,no PARANOIA_CHECK,1(!) XMIT BUF, 16 RCV BUFFS)
45 */
46
47 /*
48 * 99.Jun.8: added support for /proc/net/dev byte count for xosview (HK)
49 * 96.Sept.29: virt_to_bus stuff added for new memory modell
50 * 96.April.29: Added Harald Koenig's Patches (MH)
51 * 96.April.13: enhanced error handling .. more tests (MH)
52 * 96.April.5/6: a lot of performance tests. Got it stable now (hopefully) (MH)
53 * 96.April.1: (no joke ;) .. added EtherBlaster and Module support (MH)
54 * 96.Feb.19: fixed a few bugs .. cleanups .. tested for 1.3.66 (MH)
55 * hopefully no more 16MB limit
56 *
57 * 95.Nov.18: multicast tweaked (AC).
58 *
59 * 94.Aug.22: changes in xmit_intr (ack more than one xmitted-packet), ni65_send_packet (p->lock) (MH)
60 *
61 * 94.July.16: fixed bugs in recv_skb and skb-alloc stuff (MH)
62 */
63
64 #include <linux/kernel.h>
65 #include <linux/sched.h>
66 #include <linux/string.h>
67 #include <linux/ptrace.h>
68 #include <linux/errno.h>
69 #include <linux/ioport.h>
70 #include <linux/malloc.h>
71 #include <linux/interrupt.h>
72 #include <linux/delay.h>
73 #include <linux/init.h>
74 #include <asm/bitops.h>
75 #include <asm/io.h>
76 #include <asm/dma.h>
77
78 #include <linux/netdevice.h>
79 #include <linux/etherdevice.h>
80 #include <linux/skbuff.h>
81
82 #include <linux/version.h>
83 #include <linux/module.h>
84
85 #include "ni65.h"
86
87 /*
88 * the current setting allows an acceptable performance
89 * for 'RCV_PARANOIA_CHECK' read the 'known problems' part in
90 * the header of this file
91 * 'invert' the defines for max. performance. This may cause DMA problems
92 * on some boards (e.g on my ASUS SP3G)
93 */
94 #undef XMT_VIA_SKB
95 #undef RCV_VIA_SKB
96 #define RCV_PARANOIA_CHECK
97
98 #define MID_PERFORMANCE
99
100 #if defined( LOW_PERFORMANCE )
101 static int isa0=7,isa1=7,csr80=0x0c10;
102 #elif defined( MID_PERFORMANCE )
103 static int isa0=5,isa1=5,csr80=0x2810;
104 #else /* high performance */
105 static int isa0=4,isa1=4,csr80=0x0017;
106 #endif
107
108 /*
109 * a few card/vendor specific defines
110 */
111 #define NI65_ID0 0x00
112 #define NI65_ID1 0x55
113 #define NI65_EB_ID0 0x52
114 #define NI65_EB_ID1 0x44
115 #define NE2100_ID0 0x57
116 #define NE2100_ID1 0x57
117
118 #define PORT p->cmdr_addr
119
120 /*
121 * buffer configuration
122 */
123 #if 1
124 #define RMDNUM 16
125 #define RMDNUMMASK 0x80000000
126 #else
127 #define RMDNUM 8
128 #define RMDNUMMASK 0x60000000 /* log2(RMDNUM)<<29 */
129 #endif
130
131 #if 0
132 #define TMDNUM 1
133 #define TMDNUMMASK 0x00000000
134 #else
135 #define TMDNUM 4
136 #define TMDNUMMASK 0x40000000 /* log2(TMDNUM)<<29 */
137 #endif
138
139 /* slightly oversized */
140 #define R_BUF_SIZE 1544
141 #define T_BUF_SIZE 1544
142
143 /*
144 * lance register defines
145 */
146 #define L_DATAREG 0x00
147 #define L_ADDRREG 0x02
148 #define L_RESET 0x04
149 #define L_CONFIG 0x05
150 #define L_BUSIF 0x06
151
152 /*
153 * to access the lance/am7990-regs, you have to write
154 * reg-number into L_ADDRREG, then you can access it using L_DATAREG
155 */
156 #define CSR0 0x00
157 #define CSR1 0x01
158 #define CSR2 0x02
159 #define CSR3 0x03
160
161 #define INIT_RING_BEFORE_START 0x1
162 #define FULL_RESET_ON_ERROR 0x2
163
164 #if 0
165 #define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);inw(PORT+L_ADDRREG); \
166 outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
167 #define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_ADDRREG),\
168 inw(PORT+L_DATAREG))
169 #if 0
170 #define writedatareg(val) {outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
171 #else
172 #define writedatareg(val) { writereg(val,CSR0); }
173 #endif
174 #else
175 #define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);outw(val,PORT+L_DATAREG);}
176 #define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_DATAREG))
177 #define writedatareg(val) { writereg(val,CSR0); }
178 #endif
179
180 static unsigned char ni_vendor[] = { 0x02,0x07,0x01 };
181
182 static struct card {
183 unsigned char id0,id1;
184 short id_offset;
185 short total_size;
186 short cmd_offset;
187 short addr_offset;
188 unsigned char *vendor_id;
189 char *cardname;
190 unsigned char config;
191 } cards[] = {
192 { NI65_ID0,NI65_ID1,0x0e,0x10,0x0,0x8,ni_vendor,"ni6510", 0x1 } ,
193 { NI65_EB_ID0,NI65_EB_ID1,0x0e,0x18,0x10,0x0,ni_vendor,"ni6510 EtherBlaster", 0x2 } ,
194 { NE2100_ID0,NE2100_ID1,0x0e,0x18,0x10,0x0,NULL,"generic NE2100", 0x0 }
195 };
196 #define NUM_CARDS 3
197
198 struct priv
199 {
200 struct rmd rmdhead[RMDNUM];
201 struct tmd tmdhead[TMDNUM];
202 struct init_block ib;
203 int rmdnum;
204 int tmdnum,tmdlast;
205 #ifdef RCV_VIA_SKB
206 struct sk_buff *recv_skb[RMDNUM];
207 #else
208 void *recvbounce[RMDNUM];
209 #endif
210 #ifdef XMT_VIA_SKB
211 struct sk_buff *tmd_skb[TMDNUM];
212 #endif
213 void *tmdbounce[TMDNUM];
214 int tmdbouncenum;
215 int lock,xmit_queued;
216 struct net_device_stats stats;
217 void *self;
218 int cmdr_addr;
219 int cardno;
220 int features;
221 };
222
223 static int ni65_probe1(struct net_device *dev,int);
224 static void ni65_interrupt(int irq, void * dev_id, struct pt_regs *regs);
225 static void ni65_recv_intr(struct net_device *dev,int);
226 static void ni65_xmit_intr(struct net_device *dev,int);
227 static int ni65_open(struct net_device *dev);
228 static int ni65_lance_reinit(struct net_device *dev);
229 static void ni65_init_lance(struct priv *p,unsigned char*,int,int);
230 static int ni65_send_packet(struct sk_buff *skb, struct net_device *dev);
231 static int ni65_close(struct net_device *dev);
232 static int ni65_alloc_buffer(struct net_device *dev);
233 static void ni65_free_buffer(struct priv *p);
234 static struct net_device_stats *ni65_get_stats(struct net_device *);
235 static void set_multicast_list(struct net_device *dev);
236
237 static int irqtab[] __initdata = { 9,12,15,5 }; /* irq config-translate */
238 static int dmatab[] __initdata = { 0,3,5,6,7 }; /* dma config-translate and autodetect */
239
240 static int debuglevel = 1;
241
242 /*
243 * set 'performance' registers .. we must STOP lance for that
244 */
245 static void ni65_set_performance(struct priv *p)
246 {
247 writereg(CSR0_STOP | CSR0_CLRALL,CSR0); /* STOP */
248
249 if( !(cards[p->cardno].config & 0x02) )
250 return;
251
252 outw(80,PORT+L_ADDRREG);
253 if(inw(PORT+L_ADDRREG) != 80)
254 return;
255
256 writereg( (csr80 & 0x3fff) ,80); /* FIFO watermarks */
257 outw(0,PORT+L_ADDRREG);
258 outw((short)isa0,PORT+L_BUSIF); /* write ISA 0: DMA_R : isa0 * 50ns */
259 outw(1,PORT+L_ADDRREG);
260 outw((short)isa1,PORT+L_BUSIF); /* write ISA 1: DMA_W : isa1 * 50ns */
261
262 outw(CSR0,PORT+L_ADDRREG); /* switch back to CSR0 */
263 }
264
265 /*
266 * open interface (up)
267 */
268 static int ni65_open(struct net_device *dev)
269 {
270 struct priv *p = (struct priv *) dev->priv;
271 int irqval = request_irq(dev->irq, &ni65_interrupt,0,
272 cards[p->cardno].cardname,dev);
273 if (irqval) {
274 printk ("%s: unable to get IRQ %d (irqval=%d).\n",
275 dev->name,dev->irq, irqval);
276 return -EAGAIN;
277 }
278
279 if(ni65_lance_reinit(dev))
280 {
281 dev->tbusy = 0;
282 dev->interrupt = 0;
283 dev->start = 1;
284 MOD_INC_USE_COUNT;
285 return 0;
286 }
287 else
288 {
289 free_irq(dev->irq,dev);
290 dev->start = 0;
291 return -EAGAIN;
292 }
293 }
294
295 /*
296 * close interface (down)
297 */
298 static int ni65_close(struct net_device *dev)
299 {
300 struct priv *p = (struct priv *) dev->priv;
301
302 outw(inw(PORT+L_RESET),PORT+L_RESET); /* that's the hard way */
303
304 #ifdef XMT_VIA_SKB
305 {
306 int i;
307 for(i=0;i<TMDNUM;i++)
308 {
309 if(p->tmd_skb[i]) {
310 dev_kfree_skb(p->tmd_skb[i]);
311 p->tmd_skb[i] = NULL;
312 }
313 }
314 }
315 #endif
316 free_irq(dev->irq,dev);
317 dev->tbusy = 1;
318 dev->start = 0;
319 MOD_DEC_USE_COUNT;
320 return 0;
321 }
322
323 /*
324 * Probe The Card (not the lance-chip)
325 */
326 #ifdef MODULE
327 static
328 #endif
329 int __init ni65_probe(struct net_device *dev)
330 {
331 int *port;
332 static int ports[] = {0x360,0x300,0x320,0x340, 0};
333
334 if (dev->base_addr > 0x1ff) /* Check a single specified location. */
335 return ni65_probe1(dev, dev->base_addr);
336 else if (dev->base_addr > 0) /* Don't probe at all. */
337 return -ENXIO;
338
339 for (port = ports; *port; port++)
340 {
341 if (ni65_probe1(dev, *port) == 0)
342 return 0;
343 }
344
345 return -ENODEV;
346 }
347
348 /*
349 * this is the real card probe ..
350 */
351 static int __init ni65_probe1(struct net_device *dev,int ioaddr)
352 {
353 int i,j;
354 struct priv *p;
355 unsigned long flags;
356
357 for(i=0;i<NUM_CARDS;i++) {
358 if(check_region(ioaddr, cards[i].total_size))
359 continue;
360 if(cards[i].id_offset >= 0) {
361 if(inb(ioaddr+cards[i].id_offset+0) != cards[i].id0 ||
362 inb(ioaddr+cards[i].id_offset+1) != cards[i].id1) {
363 continue;
364 }
365 }
366 if(cards[i].vendor_id) {
367 for(j=0;j<3;j++)
368 if(inb(ioaddr+cards[i].addr_offset+j) != cards[i].vendor_id[j])
369 continue;
370 }
371 break;
372 }
373 if(i == NUM_CARDS)
374 return -ENODEV;
375
376 for(j=0;j<6;j++)
377 dev->dev_addr[j] = inb(ioaddr+cards[i].addr_offset+j);
378
379 if( (j=ni65_alloc_buffer(dev)) < 0)
380 return j;
381 p = (struct priv *) dev->priv;
382 p->cmdr_addr = ioaddr + cards[i].cmd_offset;
383 p->cardno = i;
384
385 printk("%s: %s found at %#3x, ", dev->name, cards[p->cardno].cardname , ioaddr);
386
387 outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
388 if( (j=readreg(CSR0)) != 0x4) {
389 printk(KERN_ERR "can't RESET card: %04x\n",j);
390 ni65_free_buffer(p);
391 return -EAGAIN;
392 }
393
394 outw(88,PORT+L_ADDRREG);
395 if(inw(PORT+L_ADDRREG) == 88) {
396 unsigned long v;
397 v = inw(PORT+L_DATAREG);
398 v <<= 16;
399 outw(89,PORT+L_ADDRREG);
400 v |= inw(PORT+L_DATAREG);
401 printk("Version %#08lx, ",v);
402 p->features = INIT_RING_BEFORE_START;
403 }
404 else {
405 printk("ancient LANCE, ");
406 p->features = 0x0;
407 }
408
409 if(test_bit(0,&cards[i].config)) {
410 dev->irq = irqtab[(inw(ioaddr+L_CONFIG)>>2)&3];
411 dev->dma = dmatab[inw(ioaddr+L_CONFIG)&3];
412 printk("IRQ %d (from card), DMA %d (from card).\n",dev->irq,dev->dma);
413 }
414 else {
415 if(dev->dma == 0) {
416 /* 'stuck test' from lance.c */
417 int dma_channels = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) | (inb(DMA2_STAT_REG) & 0xf0);
418 for(i=1;i<5;i++) {
419 int dma = dmatab[i];
420 if(test_bit(dma,&dma_channels) || request_dma(dma,"ni6510"))
421 continue;
422
423 flags=claim_dma_lock();
424 disable_dma(dma);
425 set_dma_mode(dma,DMA_MODE_CASCADE);
426 enable_dma(dma);
427 release_dma_lock(flags);
428
429 ni65_init_lance(p,dev->dev_addr,0,0); /* trigger memory access */
430
431 flags=claim_dma_lock();
432 disable_dma(dma);
433 free_dma(dma);
434 release_dma_lock(flags);
435
436 if(readreg(CSR0) & CSR0_IDON)
437 break;
438 }
439 if(i == 5) {
440 printk("Can't detect DMA channel!\n");
441 ni65_free_buffer(p);
442 return -EAGAIN;
443 }
444 dev->dma = dmatab[i];
445 printk("DMA %d (autodetected), ",dev->dma);
446 }
447 else
448 printk("DMA %d (assigned), ",dev->dma);
449
450 if(dev->irq < 2)
451 {
452 ni65_init_lance(p,dev->dev_addr,0,0);
453 autoirq_setup(0);
454 writereg(CSR0_INIT|CSR0_INEA,CSR0); /* trigger interrupt */
455
456 if(!(dev->irq = autoirq_report(2)))
457 {
458 printk("Failed to detect IRQ line!\n");
459 ni65_free_buffer(p);
460 return -EAGAIN;
461 }
462 printk("IRQ %d (autodetected).\n",dev->irq);
463 }
464 else
465 printk("IRQ %d (assigned).\n",dev->irq);
466 }
467
468 if(request_dma(dev->dma, cards[p->cardno].cardname ) != 0)
469 {
470 printk("%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma);
471 ni65_free_buffer(p);
472 return -EAGAIN;
473 }
474
475 /*
476 * Grab the region so we can find another board.
477 */
478 request_region(ioaddr,cards[p->cardno].total_size,cards[p->cardno].cardname);
479
480 dev->base_addr = ioaddr;
481
482 dev->open = ni65_open;
483 dev->stop = ni65_close;
484 dev->hard_start_xmit = ni65_send_packet;
485 dev->get_stats = ni65_get_stats;
486 dev->set_multicast_list = set_multicast_list;
487
488 ether_setup(dev);
489
490 dev->interrupt = 0;
491 dev->tbusy = 0;
492 dev->start = 0;
493
494 return 0; /* everything is OK */
495 }
496
497 /*
498 * set lance register and trigger init
499 */
500 static void ni65_init_lance(struct priv *p,unsigned char *daddr,int filter,int mode)
501 {
502 int i;
503 u32 pib;
504
505 writereg(CSR0_CLRALL|CSR0_STOP,CSR0);
506
507 for(i=0;i<6;i++)
508 p->ib.eaddr[i] = daddr[i];
509
510 for(i=0;i<8;i++)
511 p->ib.filter[i] = filter;
512 p->ib.mode = mode;
513
514 p->ib.trp = (u32) virt_to_bus(p->tmdhead) | TMDNUMMASK;
515 p->ib.rrp = (u32) virt_to_bus(p->rmdhead) | RMDNUMMASK;
516 writereg(0,CSR3); /* busmaster/no word-swap */
517 pib = (u32) virt_to_bus(&p->ib);
518 writereg(pib & 0xffff,CSR1);
519 writereg(pib >> 16,CSR2);
520
521 writereg(CSR0_INIT,CSR0); /* this changes L_ADDRREG to CSR0 */
522
523 for(i=0;i<32;i++)
524 {
525 mdelay(4);
526 if(inw(PORT+L_DATAREG) & (CSR0_IDON | CSR0_MERR) )
527 break; /* init ok ? */
528 }
529 }
530
531 /*
532 * allocate memory area and check the 16MB border
533 */
534 static void *ni65_alloc_mem(struct net_device *dev,char *what,int size,int type)
535 {
536 struct sk_buff *skb=NULL;
537 unsigned char *ptr;
538 void *ret;
539
540 if(type) {
541 ret = skb = alloc_skb(2+16+size,GFP_KERNEL|GFP_DMA);
542 if(!skb) {
543 printk("%s: unable to allocate %s memory.\n",dev->name,what);
544 return NULL;
545 }
546 skb->dev = dev;
547 skb_reserve(skb,2+16);
548 skb_put(skb,R_BUF_SIZE); /* grab the whole space .. (not necessary) */
549 ptr = skb->data;
550 }
551 else {
552 ret = ptr = kmalloc(T_BUF_SIZE,GFP_KERNEL | GFP_DMA);
553 if(!ret) {
554 printk("%s: unable to allocate %s memory.\n",dev->name,what);
555 return NULL;
556 }
557 }
558 if( (u32) virt_to_bus(ptr+size) > 0x1000000) {
559 printk("%s: unable to allocate %s memory in lower 16MB!\n",dev->name,what);
560 if(type)
561 kfree_skb(skb);
562 else
563 kfree(ptr);
564 return NULL;
565 }
566 return ret;
567 }
568
569 /*
570 * allocate all memory structures .. send/recv buffers etc ...
571 */
572 static int ni65_alloc_buffer(struct net_device *dev)
573 {
574 unsigned char *ptr;
575 struct priv *p;
576 int i;
577
578 /*
579 * we need 8-aligned memory ..
580 */
581 ptr = ni65_alloc_mem(dev,"BUFFER",sizeof(struct priv)+8,0);
582 if(!ptr)
583 return -ENOMEM;
584
585 p = dev->priv = (struct priv *) (((unsigned long) ptr + 7) & ~0x7);
586 memset((char *) dev->priv,0,sizeof(struct priv));
587 p->self = ptr;
588
589 for(i=0;i<TMDNUM;i++)
590 {
591 #ifdef XMT_VIA_SKB
592 p->tmd_skb[i] = NULL;
593 #endif
594 p->tmdbounce[i] = ni65_alloc_mem(dev,"XMIT",T_BUF_SIZE,0);
595 if(!p->tmdbounce[i]) {
596 ni65_free_buffer(p);
597 return -ENOMEM;
598 }
599 }
600
601 for(i=0;i<RMDNUM;i++)
602 {
603 #ifdef RCV_VIA_SKB
604 p->recv_skb[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,1);
605 if(!p->recv_skb[i]) {
606 ni65_free_buffer(p);
607 return -ENOMEM;
608 }
609 #else
610 p->recvbounce[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,0);
611 if(!p->recvbounce[i]) {
612 ni65_free_buffer(p);
613 return -ENOMEM;
614 }
615 #endif
616 }
617
618 return 0; /* everything is OK */
619 }
620
621 /*
622 * free buffers and private struct
623 */
624 static void ni65_free_buffer(struct priv *p)
625 {
626 int i;
627
628 if(!p)
629 return;
630
631 for(i=0;i<TMDNUM;i++) {
632 if(p->tmdbounce[i])
633 kfree(p->tmdbounce[i]);
634 #ifdef XMT_VIA_SKB
635 if(p->tmd_skb[i])
636 dev_kfree_skb(p->tmd_skb[i]);
637 #endif
638 }
639
640 for(i=0;i<RMDNUM;i++)
641 {
642 #ifdef RCV_VIA_SKB
643 if(p->recv_skb[i])
644 dev_kfree_skb(p->recv_skb[i]);
645 #else
646 if(p->recvbounce[i])
647 kfree(p->recvbounce[i]);
648 #endif
649 }
650 if(p->self)
651 kfree(p->self);
652 }
653
654
655 /*
656 * stop and (re)start lance .. e.g after an error
657 */
658 static void ni65_stop_start(struct net_device *dev,struct priv *p)
659 {
660 int csr0 = CSR0_INEA;
661
662 writedatareg(CSR0_STOP);
663
664 if(debuglevel > 1)
665 printk("ni65_stop_start\n");
666
667 if(p->features & INIT_RING_BEFORE_START) {
668 int i;
669 #ifdef XMT_VIA_SKB
670 struct sk_buff *skb_save[TMDNUM];
671 #endif
672 unsigned long buffer[TMDNUM];
673 short blen[TMDNUM];
674
675 if(p->xmit_queued) {
676 while(1) {
677 if((p->tmdhead[p->tmdlast].u.s.status & XMIT_OWN))
678 break;
679 p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
680 if(p->tmdlast == p->tmdnum)
681 break;
682 }
683 }
684
685 for(i=0;i<TMDNUM;i++) {
686 struct tmd *tmdp = p->tmdhead + i;
687 #ifdef XMT_VIA_SKB
688 skb_save[i] = p->tmd_skb[i];
689 #endif
690 buffer[i] = (u32) bus_to_virt(tmdp->u.buffer);
691 blen[i] = tmdp->blen;
692 tmdp->u.s.status = 0x0;
693 }
694
695 for(i=0;i<RMDNUM;i++) {
696 struct rmd *rmdp = p->rmdhead + i;
697 rmdp->u.s.status = RCV_OWN;
698 }
699 p->tmdnum = p->xmit_queued = 0;
700 writedatareg(CSR0_STRT | csr0);
701
702 for(i=0;i<TMDNUM;i++) {
703 int num = (i + p->tmdlast) & (TMDNUM-1);
704 p->tmdhead[i].u.buffer = (u32) virt_to_bus((char *)buffer[num]); /* status is part of buffer field */
705 p->tmdhead[i].blen = blen[num];
706 if(p->tmdhead[i].u.s.status & XMIT_OWN) {
707 p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
708 p->xmit_queued = 1;
709 writedatareg(CSR0_TDMD | CSR0_INEA | csr0);
710 }
711 #ifdef XMT_VIA_SKB
712 p->tmd_skb[i] = skb_save[num];
713 #endif
714 }
715 p->rmdnum = p->tmdlast = 0;
716 if(!p->lock)
717 dev->tbusy = (p->tmdnum || !p->xmit_queued) ? 0 : 1;
718 dev->trans_start = jiffies;
719 }
720 else
721 writedatareg(CSR0_STRT | csr0);
722 }
723
724 /*
725 * init lance (write init-values .. init-buffers) (open-helper)
726 */
727 static int ni65_lance_reinit(struct net_device *dev)
728 {
729 int i;
730 struct priv *p = (struct priv *) dev->priv;
731 unsigned long flags;
732
733 p->lock = 0;
734 p->xmit_queued = 0;
735
736 flags=claim_dma_lock();
737 disable_dma(dev->dma); /* I've never worked with dma, but we do it like the packetdriver */
738 set_dma_mode(dev->dma,DMA_MODE_CASCADE);
739 enable_dma(dev->dma);
740 release_dma_lock(flags);
741
742 outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
743 if( (i=readreg(CSR0) ) != 0x4)
744 {
745 printk(KERN_ERR "%s: can't RESET %s card: %04x\n",dev->name,
746 cards[p->cardno].cardname,(int) i);
747 flags=claim_dma_lock();
748 disable_dma(dev->dma);
749 release_dma_lock(flags);
750 return 0;
751 }
752
753 p->rmdnum = p->tmdnum = p->tmdlast = p->tmdbouncenum = 0;
754 for(i=0;i<TMDNUM;i++)
755 {
756 struct tmd *tmdp = p->tmdhead + i;
757 #ifdef XMT_VIA_SKB
758 if(p->tmd_skb[i]) {
759 dev_kfree_skb(p->tmd_skb[i]);
760 p->tmd_skb[i] = NULL;
761 }
762 #endif
763 tmdp->u.buffer = 0x0;
764 tmdp->u.s.status = XMIT_START | XMIT_END;
765 tmdp->blen = tmdp->status2 = 0;
766 }
767
768 for(i=0;i<RMDNUM;i++)
769 {
770 struct rmd *rmdp = p->rmdhead + i;
771 #ifdef RCV_VIA_SKB
772 rmdp->u.buffer = (u32) virt_to_bus(p->recv_skb[i]->data);
773 #else
774 rmdp->u.buffer = (u32) virt_to_bus(p->recvbounce[i]);
775 #endif
776 rmdp->blen = -(R_BUF_SIZE-8);
777 rmdp->mlen = 0;
778 rmdp->u.s.status = RCV_OWN;
779 }
780
781 if(dev->flags & IFF_PROMISC)
782 ni65_init_lance(p,dev->dev_addr,0x00,M_PROM);
783 else if(dev->mc_count || dev->flags & IFF_ALLMULTI)
784 ni65_init_lance(p,dev->dev_addr,0xff,0x0);
785 else
786 ni65_init_lance(p,dev->dev_addr,0x00,0x00);
787
788 /*
789 * ni65_set_lance_mem() sets L_ADDRREG to CSR0
790 * NOW, WE WILL NEVER CHANGE THE L_ADDRREG, CSR0 IS ALWAYS SELECTED
791 */
792
793 if(inw(PORT+L_DATAREG) & CSR0_IDON) {
794 ni65_set_performance(p);
795 /* init OK: start lance , enable interrupts */
796 writedatareg(CSR0_CLRALL | CSR0_INEA | CSR0_STRT);
797 return 1; /* ->OK */
798 }
799 printk(KERN_ERR "%s: can't init lance, status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG));
800 flags=claim_dma_lock();
801 disable_dma(dev->dma);
802 release_dma_lock(flags);
803 return 0; /* ->Error */
804 }
805
806 /*
807 * interrupt handler
808 */
809 static void ni65_interrupt(int irq, void * dev_id, struct pt_regs * regs)
810 {
811 int csr0;
812 struct net_device *dev = dev_id;
813 struct priv *p;
814 int bcnt = 32;
815
816 if (dev == NULL) {
817 printk (KERN_ERR "ni65_interrupt(): irq %d for unknown device.\n", irq);
818 return;
819 }
820
821 if(test_and_set_bit(0,(int *) &dev->interrupt)) {
822 printk("ni65: oops .. interrupt while proceeding interrupt\n");
823 return;
824 }
825 p = (struct priv *) dev->priv;
826
827 while(--bcnt) {
828 csr0 = inw(PORT+L_DATAREG);
829
830 #if 0
831 writedatareg( (csr0 & CSR0_CLRALL) ); /* ack interrupts, disable int. */
832 #else
833 writedatareg( (csr0 & CSR0_CLRALL) | CSR0_INEA ); /* ack interrupts, interrupts enabled */
834 #endif
835
836 if(!(csr0 & (CSR0_ERR | CSR0_RINT | CSR0_TINT)))
837 break;
838
839 if(csr0 & CSR0_RINT) /* RECV-int? */
840 ni65_recv_intr(dev,csr0);
841 if(csr0 & CSR0_TINT) /* XMIT-int? */
842 ni65_xmit_intr(dev,csr0);
843
844 if(csr0 & CSR0_ERR)
845 {
846 struct priv *p = (struct priv *) dev->priv;
847 if(debuglevel > 1)
848 printk("%s: general error: %04x.\n",dev->name,csr0);
849 if(csr0 & CSR0_BABL)
850 p->stats.tx_errors++;
851 if(csr0 & CSR0_MISS) {
852 int i;
853 for(i=0;i<RMDNUM;i++)
854 printk("%02x ",p->rmdhead[i].u.s.status);
855 printk("\n");
856 p->stats.rx_errors++;
857 }
858 if(csr0 & CSR0_MERR) {
859 if(debuglevel > 1)
860 printk("%s: Ooops .. memory error: %04x.\n",dev->name,csr0);
861 ni65_stop_start(dev,p);
862 }
863 }
864 }
865
866 #ifdef RCV_PARANOIA_CHECK
867 {
868 int j;
869 for(j=0;j<RMDNUM;j++)
870 {
871 struct priv *p = (struct priv *) dev->priv;
872 int i,k,num1,num2;
873 for(i=RMDNUM-1;i>0;i--) {
874 num2 = (p->rmdnum + i) & (RMDNUM-1);
875 if(!(p->rmdhead[num2].u.s.status & RCV_OWN))
876 break;
877 }
878
879 if(i) {
880 for(k=0;k<RMDNUM;k++) {
881 num1 = (p->rmdnum + k) & (RMDNUM-1);
882 if(!(p->rmdhead[num1].u.s.status & RCV_OWN))
883 break;
884 }
885 if(!k)
886 break;
887
888 if(debuglevel > 0)
889 {
890 char buf[256],*buf1;
891 int k;
892 buf1 = buf;
893 for(k=0;k<RMDNUM;k++) {
894 sprintf(buf1,"%02x ",(p->rmdhead[k].u.s.status)); /* & RCV_OWN) ); */
895 buf1 += 3;
896 }
897 *buf1 = 0;
898 printk(KERN_ERR "%s: Ooops, receive ring corrupted %2d %2d | %s\n",dev->name,p->rmdnum,i,buf);
899 }
900
901 p->rmdnum = num1;
902 ni65_recv_intr(dev,csr0);
903 if((p->rmdhead[num2].u.s.status & RCV_OWN))
904 break; /* ok, we are 'in sync' again */
905 }
906 else
907 break;
908 }
909 }
910 #endif
911
912 if( (csr0 & (CSR0_RXON | CSR0_TXON)) != (CSR0_RXON | CSR0_TXON) ) {
913 printk("%s: RX or TX was offline -> restart\n",dev->name);
914 ni65_stop_start(dev,p);
915 }
916 else
917 writedatareg(CSR0_INEA);
918
919 dev->interrupt = 0;
920
921 return;
922 }
923
924 /*
925 * We have received an Xmit-Interrupt ..
926 * send a new packet if necessary
927 */
928 static void ni65_xmit_intr(struct net_device *dev,int csr0)
929 {
930 struct priv *p = (struct priv *) dev->priv;
931
932 while(p->xmit_queued)
933 {
934 struct tmd *tmdp = p->tmdhead + p->tmdlast;
935 int tmdstat = tmdp->u.s.status;
936
937 if(tmdstat & XMIT_OWN)
938 break;
939
940 if(tmdstat & XMIT_ERR)
941 {
942 #if 0
943 if(tmdp->status2 & XMIT_TDRMASK && debuglevel > 3)
944 printk(KERN_ERR "%s: tdr-problems (e.g. no resistor)\n",dev->name);
945 #endif
946 /* checking some errors */
947 if(tmdp->status2 & XMIT_RTRY)
948 p->stats.tx_aborted_errors++;
949 if(tmdp->status2 & XMIT_LCAR)
950 p->stats.tx_carrier_errors++;
951 if(tmdp->status2 & (XMIT_BUFF | XMIT_UFLO )) {
952 /* this stops the xmitter */
953 p->stats.tx_fifo_errors++;
954 if(debuglevel > 0)
955 printk(KERN_ERR "%s: Xmit FIFO/BUFF error\n",dev->name);
956 if(p->features & INIT_RING_BEFORE_START) {
957 tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END; /* test: resend this frame */
958 ni65_stop_start(dev,p);
959 break; /* no more Xmit processing .. */
960 }
961 else
962 ni65_stop_start(dev,p);
963 }
964 if(debuglevel > 2)
965 printk(KERN_ERR "%s: xmit-error: %04x %02x-%04x\n",dev->name,csr0,(int) tmdstat,(int) tmdp->status2);
966 if(!(csr0 & CSR0_BABL)) /* don't count errors twice */
967 p->stats.tx_errors++;
968 tmdp->status2 = 0;
969 }
970 else {
971 p->stats.tx_bytes -= (short)(tmdp->blen);
972 p->stats.tx_packets++;
973 }
974
975 #ifdef XMT_VIA_SKB
976 if(p->tmd_skb[p->tmdlast]) {
977 dev_kfree_skb(p->tmd_skb[p->tmdlast]);
978 p->tmd_skb[p->tmdlast] = NULL;
979 }
980 #endif
981
982 p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
983 if(p->tmdlast == p->tmdnum)
984 p->xmit_queued = 0;
985 }
986 dev->tbusy = 0;
987 mark_bh(NET_BH);
988 }
989
990 /*
991 * We have received a packet
992 */
993 static void ni65_recv_intr(struct net_device *dev,int csr0)
994 {
995 struct rmd *rmdp;
996 int rmdstat,len;
997 int cnt=0;
998 struct priv *p = (struct priv *) dev->priv;
999
1000 rmdp = p->rmdhead + p->rmdnum;
1001 while(!( (rmdstat = rmdp->u.s.status) & RCV_OWN))
1002 {
1003 cnt++;
1004 if( (rmdstat & (RCV_START | RCV_END | RCV_ERR)) != (RCV_START | RCV_END) ) /* error or oversized? */
1005 {
1006 if(!(rmdstat & RCV_ERR)) {
1007 if(rmdstat & RCV_START)
1008 {
1009 p->stats.rx_length_errors++;
1010 printk(KERN_ERR "%s: recv, packet too long: %d\n",dev->name,rmdp->mlen & 0x0fff);
1011 }
1012 }
1013 else {
1014 if(debuglevel > 2)
1015 printk(KERN_ERR "%s: receive-error: %04x, lance-status: %04x/%04x\n",
1016 dev->name,(int) rmdstat,csr0,(int) inw(PORT+L_DATAREG) );
1017 if(rmdstat & RCV_FRAM)
1018 p->stats.rx_frame_errors++;
1019 if(rmdstat & RCV_OFLO)
1020 p->stats.rx_over_errors++;
1021 if(rmdstat & RCV_CRC)
1022 p->stats.rx_crc_errors++;
1023 if(rmdstat & RCV_BUF_ERR)
1024 p->stats.rx_fifo_errors++;
1025 }
1026 if(!(csr0 & CSR0_MISS)) /* don't count errors twice */
1027 p->stats.rx_errors++;
1028 }
1029 else if( (len = (rmdp->mlen & 0x0fff) - 4) >= 60)
1030 {
1031 #ifdef RCV_VIA_SKB
1032 struct sk_buff *skb = alloc_skb(R_BUF_SIZE+2+16,GFP_ATOMIC);
1033 if (skb)
1034 skb_reserve(skb,16);
1035 #else
1036 struct sk_buff *skb = dev_alloc_skb(len+2);
1037 #endif
1038 if(skb)
1039 {
1040 skb_reserve(skb,2);
1041 skb->dev = dev;
1042 #ifdef RCV_VIA_SKB
1043 if( (unsigned long) (skb->data + R_BUF_SIZE) > 0x1000000) {
1044 skb_put(skb,len);
1045 eth_copy_and_sum(skb, (unsigned char *)(p->recv_skb[p->rmdnum]->data),len,0);
1046 }
1047 else {
1048 struct sk_buff *skb1 = p->recv_skb[p->rmdnum];
1049 skb_put(skb,R_BUF_SIZE);
1050 p->recv_skb[p->rmdnum] = skb;
1051 rmdp->u.buffer = (u32) virt_to_bus(skb->data);
1052 skb = skb1;
1053 skb_trim(skb,len);
1054 }
1055 #else
1056 skb_put(skb,len);
1057 eth_copy_and_sum(skb, (unsigned char *) p->recvbounce[p->rmdnum],len,0);
1058 #endif
1059 p->stats.rx_packets++;
1060 p->stats.rx_bytes += len;
1061 skb->protocol=eth_type_trans(skb,dev);
1062 netif_rx(skb);
1063 }
1064 else
1065 {
1066 printk(KERN_ERR "%s: can't alloc new sk_buff\n",dev->name);
1067 p->stats.rx_dropped++;
1068 }
1069 }
1070 else {
1071 printk(KERN_INFO "%s: received runt packet\n",dev->name);
1072 p->stats.rx_errors++;
1073 }
1074 rmdp->blen = -(R_BUF_SIZE-8);
1075 rmdp->mlen = 0;
1076 rmdp->u.s.status = RCV_OWN; /* change owner */
1077 p->rmdnum = (p->rmdnum + 1) & (RMDNUM-1);
1078 rmdp = p->rmdhead + p->rmdnum;
1079 }
1080 }
1081
1082 /*
1083 * kick xmitter ..
1084 */
1085 static int ni65_send_packet(struct sk_buff *skb, struct net_device *dev)
1086 {
1087 struct priv *p = (struct priv *) dev->priv;
1088
1089 if(dev->tbusy)
1090 {
1091 int tickssofar = jiffies - dev->trans_start;
1092 if (tickssofar < 50)
1093 return 1;
1094
1095 printk(KERN_ERR "%s: xmitter timed out, try to restart!\n",dev->name);
1096 {
1097 int i;
1098 for(i=0;i<TMDNUM;i++)
1099 printk("%02x ",p->tmdhead[i].u.s.status);
1100 printk("\n");
1101 }
1102 ni65_lance_reinit(dev);
1103 dev->tbusy=0;
1104 dev->trans_start = jiffies;
1105 }
1106
1107 if (test_and_set_bit(0, (void*)&dev->tbusy) != 0) {
1108 printk(KERN_ERR "%s: Transmitter access conflict.\n", dev->name);
1109 return 1;
1110 }
1111 if (test_and_set_bit(0, (void*)&p->lock)) {
1112 printk(KERN_ERR "%s: Queue was locked.\n", dev->name);
1113 return 1;
1114 }
1115
1116 {
1117 short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
1118 struct tmd *tmdp;
1119 long flags;
1120
1121 #ifdef XMT_VIA_SKB
1122 if( (unsigned long) (skb->data + skb->len) > 0x1000000) {
1123 #endif
1124
1125 memcpy((char *) p->tmdbounce[p->tmdbouncenum] ,(char *)skb->data,
1126 (skb->len > T_BUF_SIZE) ? T_BUF_SIZE : skb->len);
1127 dev_kfree_skb (skb);
1128
1129 save_flags(flags);
1130 cli();
1131
1132 tmdp = p->tmdhead + p->tmdnum;
1133 tmdp->u.buffer = (u32) virt_to_bus(p->tmdbounce[p->tmdbouncenum]);
1134 p->tmdbouncenum = (p->tmdbouncenum + 1) & (TMDNUM - 1);
1135
1136 #ifdef XMT_VIA_SKB
1137 }
1138 else {
1139 save_flags(flags);
1140 cli();
1141
1142 tmdp = p->tmdhead + p->tmdnum;
1143 tmdp->u.buffer = (u32) virt_to_bus(skb->data);
1144 p->tmd_skb[p->tmdnum] = skb;
1145 }
1146 #endif
1147 tmdp->blen = -len;
1148
1149 tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;
1150 writedatareg(CSR0_TDMD | CSR0_INEA); /* enable xmit & interrupt */
1151
1152 p->xmit_queued = 1;
1153 p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
1154
1155 dev->tbusy = (p->tmdnum == p->tmdlast) ? 1 : 0;
1156 p->lock = 0;
1157 dev->trans_start = jiffies;
1158
1159 restore_flags(flags);
1160 }
1161
1162 return 0;
1163 }
1164
1165 static struct net_device_stats *ni65_get_stats(struct net_device *dev)
1166 {
1167
1168 #if 0
1169 int i;
1170 struct priv *p = (struct priv *) dev->priv;
1171 for(i=0;i<RMDNUM;i++)
1172 {
1173 struct rmd *rmdp = p->rmdhead + ((p->rmdnum + i) & (RMDNUM-1));
1174 printk("%02x ",rmdp->u.s.status);
1175 }
1176 printk("\n");
1177 #endif
1178
1179 return &((struct priv *) dev->priv)->stats;
1180 }
1181
1182 static void set_multicast_list(struct net_device *dev)
1183 {
1184 if(!ni65_lance_reinit(dev))
1185 printk(KERN_ERR "%s: Can't switch card into MC mode!\n",dev->name);
1186 dev->tbusy = 0;
1187 }
1188
1189 #ifdef MODULE
1190 static char devicename[9] = { 0, };
1191
1192 static struct net_device dev_ni65 = {
1193 devicename, /* "ni6510": device name inserted by net_init.c */
1194 0, 0, 0, 0,
1195 0x360, 9, /* I/O address, IRQ */
1196 0, 0, 0, NULL, ni65_probe };
1197
1198 /* set: io,irq,dma or set it when calling insmod */
1199 static int irq=0;
1200 static int io=0;
1201 static int dma=0;
1202
1203 MODULE_PARM(irq, "i");
1204 MODULE_PARM(io, "i");
1205 MODULE_PARM(dma, "i");
1206
1207 int init_module(void)
1208 {
1209 dev_ni65.irq = irq;
1210 dev_ni65.dma = dma;
1211 dev_ni65.base_addr = io;
1212 if (register_netdev(&dev_ni65) != 0)
1213 return -EIO;
1214 return 0;
1215 }
1216
1217 void cleanup_module(void)
1218 {
1219 struct priv *p;
1220 p = (struct priv *) dev_ni65.priv;
1221 if(!p) {
1222 printk("Ooops .. no private struct\n");
1223 return;
1224 }
1225 disable_dma(dev_ni65.dma);
1226 free_dma(dev_ni65.dma);
1227 unregister_netdev(&dev_ni65);
1228 release_region(dev_ni65.base_addr,cards[p->cardno].total_size);
1229 ni65_free_buffer(p);
1230 dev_ni65.priv = NULL;
1231 }
1232 #endif /* MODULE */
1233
1234 /*
1235 * END of ni65.c
1236 */
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