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cmd64x: don't clear the other channel's interrupt
[linux-2.6/linux-mips/linux-dm7025.git] / drivers / net / ni65.c
blob3edc971d0ecabfba1ecfdee18af52bc5e1204682
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 General 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/string.h>
66 #include <linux/errno.h>
67 #include <linux/ioport.h>
68 #include <linux/slab.h>
69 #include <linux/interrupt.h>
70 #include <linux/delay.h>
71 #include <linux/init.h>
72 #include <linux/netdevice.h>
73 #include <linux/etherdevice.h>
74 #include <linux/skbuff.h>
75 #include <linux/module.h>
76 #include <linux/bitops.h>
77
78 #include <asm/io.h>
79 #include <asm/dma.h>
80
81 #include "ni65.h"
82
83 /*
84 * the current setting allows an acceptable performance
85 * for 'RCV_PARANOIA_CHECK' read the 'known problems' part in
86 * the header of this file
87 * 'invert' the defines for max. performance. This may cause DMA problems
88 * on some boards (e.g on my ASUS SP3G)
89 */
90 #undef XMT_VIA_SKB
91 #undef RCV_VIA_SKB
92 #define RCV_PARANOIA_CHECK
93
94 #define MID_PERFORMANCE
95
96 #if defined( LOW_PERFORMANCE )
97 static int isa0=7,isa1=7,csr80=0x0c10;
98 #elif defined( MID_PERFORMANCE )
99 static int isa0=5,isa1=5,csr80=0x2810;
100 #else /* high performance */
101 static int isa0=4,isa1=4,csr80=0x0017;
102 #endif
103
104 /*
105 * a few card/vendor specific defines
106 */
107 #define NI65_ID0 0x00
108 #define NI65_ID1 0x55
109 #define NI65_EB_ID0 0x52
110 #define NI65_EB_ID1 0x44
111 #define NE2100_ID0 0x57
112 #define NE2100_ID1 0x57
113
114 #define PORT p->cmdr_addr
115
116 /*
117 * buffer configuration
118 */
119 #if 1
120 #define RMDNUM 16
121 #define RMDNUMMASK 0x80000000
122 #else
123 #define RMDNUM 8
124 #define RMDNUMMASK 0x60000000 /* log2(RMDNUM)<<29 */
125 #endif
126
127 #if 0
128 #define TMDNUM 1
129 #define TMDNUMMASK 0x00000000
130 #else
131 #define TMDNUM 4
132 #define TMDNUMMASK 0x40000000 /* log2(TMDNUM)<<29 */
133 #endif
134
135 /* slightly oversized */
136 #define R_BUF_SIZE 1544
137 #define T_BUF_SIZE 1544
138
139 /*
140 * lance register defines
141 */
142 #define L_DATAREG 0x00
143 #define L_ADDRREG 0x02
144 #define L_RESET 0x04
145 #define L_CONFIG 0x05
146 #define L_BUSIF 0x06
147
148 /*
149 * to access the lance/am7990-regs, you have to write
150 * reg-number into L_ADDRREG, then you can access it using L_DATAREG
151 */
152 #define CSR0 0x00
153 #define CSR1 0x01
154 #define CSR2 0x02
155 #define CSR3 0x03
156
157 #define INIT_RING_BEFORE_START 0x1
158 #define FULL_RESET_ON_ERROR 0x2
159
160 #if 0
161 #define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);inw(PORT+L_ADDRREG); \
162 outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
163 #define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_ADDRREG),\
164 inw(PORT+L_DATAREG))
165 #if 0
166 #define writedatareg(val) {outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
167 #else
168 #define writedatareg(val) { writereg(val,CSR0); }
169 #endif
170 #else
171 #define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);outw(val,PORT+L_DATAREG);}
172 #define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_DATAREG))
173 #define writedatareg(val) { writereg(val,CSR0); }
174 #endif
175
176 static unsigned char ni_vendor[] = { 0x02,0x07,0x01 };
177
178 static struct card {
179 unsigned char id0,id1;
180 short id_offset;
181 short total_size;
182 short cmd_offset;
183 short addr_offset;
184 unsigned char *vendor_id;
185 char *cardname;
186 unsigned long config;
187 } cards[] = {
188 {
189 .id0 = NI65_ID0,
190 .id1 = NI65_ID1,
191 .id_offset = 0x0e,
192 .total_size = 0x10,
193 .cmd_offset = 0x0,
194 .addr_offset = 0x8,
195 .vendor_id = ni_vendor,
196 .cardname = "ni6510",
197 .config = 0x1,
198 },
199 {
200 .id0 = NI65_EB_ID0,
201 .id1 = NI65_EB_ID1,
202 .id_offset = 0x0e,
203 .total_size = 0x18,
204 .cmd_offset = 0x10,
205 .addr_offset = 0x0,
206 .vendor_id = ni_vendor,
207 .cardname = "ni6510 EtherBlaster",
208 .config = 0x2,
209 },
210 {
211 .id0 = NE2100_ID0,
212 .id1 = NE2100_ID1,
213 .id_offset = 0x0e,
214 .total_size = 0x18,
215 .cmd_offset = 0x10,
216 .addr_offset = 0x0,
217 .vendor_id = NULL,
218 .cardname = "generic NE2100",
219 .config = 0x0,
220 },
221 };
222 #define NUM_CARDS 3
223
224 struct priv
225 {
226 struct rmd rmdhead[RMDNUM];
227 struct tmd tmdhead[TMDNUM];
228 struct init_block ib;
229 int rmdnum;
230 int tmdnum,tmdlast;
231 #ifdef RCV_VIA_SKB
232 struct sk_buff *recv_skb[RMDNUM];
233 #else
234 void *recvbounce[RMDNUM];
235 #endif
236 #ifdef XMT_VIA_SKB
237 struct sk_buff *tmd_skb[TMDNUM];
238 #endif
239 void *tmdbounce[TMDNUM];
240 int tmdbouncenum;
241 int lock,xmit_queued;
242 struct net_device_stats stats;
243 void *self;
244 int cmdr_addr;
245 int cardno;
246 int features;
247 spinlock_t ring_lock;
248 };
249
250 static int ni65_probe1(struct net_device *dev,int);
251 static irqreturn_t ni65_interrupt(int irq, void * dev_id);
252 static void ni65_recv_intr(struct net_device *dev,int);
253 static void ni65_xmit_intr(struct net_device *dev,int);
254 static int ni65_open(struct net_device *dev);
255 static int ni65_lance_reinit(struct net_device *dev);
256 static void ni65_init_lance(struct priv *p,unsigned char*,int,int);
257 static int ni65_send_packet(struct sk_buff *skb, struct net_device *dev);
258 static void ni65_timeout(struct net_device *dev);
259 static int ni65_close(struct net_device *dev);
260 static int ni65_alloc_buffer(struct net_device *dev);
261 static void ni65_free_buffer(struct priv *p);
262 static struct net_device_stats *ni65_get_stats(struct net_device *);
263 static void set_multicast_list(struct net_device *dev);
264
265 static int irqtab[] __initdata = { 9,12,15,5 }; /* irq config-translate */
266 static int dmatab[] __initdata = { 0,3,5,6,7 }; /* dma config-translate and autodetect */
267
268 static int debuglevel = 1;
269
270 /*
271 * set 'performance' registers .. we must STOP lance for that
272 */
273 static void ni65_set_performance(struct priv *p)
274 {
275 writereg(CSR0_STOP | CSR0_CLRALL,CSR0); /* STOP */
276
277 if( !(cards[p->cardno].config & 0x02) )
278 return;
279
280 outw(80,PORT+L_ADDRREG);
281 if(inw(PORT+L_ADDRREG) != 80)
282 return;
283
284 writereg( (csr80 & 0x3fff) ,80); /* FIFO watermarks */
285 outw(0,PORT+L_ADDRREG);
286 outw((short)isa0,PORT+L_BUSIF); /* write ISA 0: DMA_R : isa0 * 50ns */
287 outw(1,PORT+L_ADDRREG);
288 outw((short)isa1,PORT+L_BUSIF); /* write ISA 1: DMA_W : isa1 * 50ns */
289
290 outw(CSR0,PORT+L_ADDRREG); /* switch back to CSR0 */
291 }
292
293 /*
294 * open interface (up)
295 */
296 static int ni65_open(struct net_device *dev)
297 {
298 struct priv *p = (struct priv *) dev->priv;
299 int irqval = request_irq(dev->irq, &ni65_interrupt,0,
300 cards[p->cardno].cardname,dev);
301 if (irqval) {
302 printk(KERN_ERR "%s: unable to get IRQ %d (irqval=%d).\n",
303 dev->name,dev->irq, irqval);
304 return -EAGAIN;
305 }
306
307 if(ni65_lance_reinit(dev))
308 {
309 netif_start_queue(dev);
310 return 0;
311 }
312 else
313 {
314 free_irq(dev->irq,dev);
315 return -EAGAIN;
316 }
317 }
318
319 /*
320 * close interface (down)
321 */
322 static int ni65_close(struct net_device *dev)
323 {
324 struct priv *p = (struct priv *) dev->priv;
325
326 netif_stop_queue(dev);
327
328 outw(inw(PORT+L_RESET),PORT+L_RESET); /* that's the hard way */
329
330 #ifdef XMT_VIA_SKB
331 {
332 int i;
333 for(i=0;i<TMDNUM;i++)
334 {
335 if(p->tmd_skb[i]) {
336 dev_kfree_skb(p->tmd_skb[i]);
337 p->tmd_skb[i] = NULL;
338 }
339 }
340 }
341 #endif
342 free_irq(dev->irq,dev);
343 return 0;
344 }
345
346 static void cleanup_card(struct net_device *dev)
347 {
348 struct priv *p = (struct priv *) dev->priv;
349 disable_dma(dev->dma);
350 free_dma(dev->dma);
351 release_region(dev->base_addr, cards[p->cardno].total_size);
352 ni65_free_buffer(p);
353 }
354
355 /* set: io,irq,dma or set it when calling insmod */
356 static int irq;
357 static int io;
358 static int dma;
359
360 /*
361 * Probe The Card (not the lance-chip)
362 */
363 struct net_device * __init ni65_probe(int unit)
364 {
365 struct net_device *dev = alloc_etherdev(0);
366 static int ports[] = {0x360,0x300,0x320,0x340, 0};
367 int *port;
368 int err = 0;
369
370 if (!dev)
371 return ERR_PTR(-ENOMEM);
372
373 if (unit >= 0) {
374 sprintf(dev->name, "eth%d", unit);
375 netdev_boot_setup_check(dev);
376 irq = dev->irq;
377 dma = dev->dma;
378 } else {
379 dev->base_addr = io;
380 }
381
382 if (dev->base_addr > 0x1ff) { /* Check a single specified location. */
383 err = ni65_probe1(dev, dev->base_addr);
384 } else if (dev->base_addr > 0) { /* Don't probe at all. */
385 err = -ENXIO;
386 } else {
387 for (port = ports; *port && ni65_probe1(dev, *port); port++)
388 ;
389 if (!*port)
390 err = -ENODEV;
391 }
392 if (err)
393 goto out;
394
395 err = register_netdev(dev);
396 if (err)
397 goto out1;
398 return dev;
399 out1:
400 cleanup_card(dev);
401 out:
402 free_netdev(dev);
403 return ERR_PTR(err);
404 }
405
406 /*
407 * this is the real card probe ..
408 */
409 static int __init ni65_probe1(struct net_device *dev,int ioaddr)
410 {
411 int i,j;
412 struct priv *p;
413 unsigned long flags;
414
415 dev->irq = irq;
416 dev->dma = dma;
417
418 for(i=0;i<NUM_CARDS;i++) {
419 if(!request_region(ioaddr, cards[i].total_size, cards[i].cardname))
420 continue;
421 if(cards[i].id_offset >= 0) {
422 if(inb(ioaddr+cards[i].id_offset+0) != cards[i].id0 ||
423 inb(ioaddr+cards[i].id_offset+1) != cards[i].id1) {
424 release_region(ioaddr, cards[i].total_size);
425 continue;
426 }
427 }
428 if(cards[i].vendor_id) {
429 for(j=0;j<3;j++)
430 if(inb(ioaddr+cards[i].addr_offset+j) != cards[i].vendor_id[j]) {
431 release_region(ioaddr, cards[i].total_size);
432 continue;
433 }
434 }
435 break;
436 }
437 if(i == NUM_CARDS)
438 return -ENODEV;
439
440 for(j=0;j<6;j++)
441 dev->dev_addr[j] = inb(ioaddr+cards[i].addr_offset+j);
442
443 if( (j=ni65_alloc_buffer(dev)) < 0) {
444 release_region(ioaddr, cards[i].total_size);
445 return j;
446 }
447 p = (struct priv *) dev->priv;
448 p->cmdr_addr = ioaddr + cards[i].cmd_offset;
449 p->cardno = i;
450 spin_lock_init(&p->ring_lock);
451
452 printk(KERN_INFO "%s: %s found at %#3x, ", dev->name, cards[p->cardno].cardname , ioaddr);
453
454 outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
455 if( (j=readreg(CSR0)) != 0x4) {
456 printk("failed.\n");
457 printk(KERN_ERR "%s: Can't RESET card: %04x\n", dev->name, j);
458 ni65_free_buffer(p);
459 release_region(ioaddr, cards[p->cardno].total_size);
460 return -EAGAIN;
461 }
462
463 outw(88,PORT+L_ADDRREG);
464 if(inw(PORT+L_ADDRREG) == 88) {
465 unsigned long v;
466 v = inw(PORT+L_DATAREG);
467 v <<= 16;
468 outw(89,PORT+L_ADDRREG);
469 v |= inw(PORT+L_DATAREG);
470 printk("Version %#08lx, ",v);
471 p->features = INIT_RING_BEFORE_START;
472 }
473 else {
474 printk("ancient LANCE, ");
475 p->features = 0x0;
476 }
477
478 if(test_bit(0,&cards[i].config)) {
479 dev->irq = irqtab[(inw(ioaddr+L_CONFIG)>>2)&3];
480 dev->dma = dmatab[inw(ioaddr+L_CONFIG)&3];
481 printk("IRQ %d (from card), DMA %d (from card).\n",dev->irq,dev->dma);
482 }
483 else {
484 if(dev->dma == 0) {
485 /* 'stuck test' from lance.c */
486 long dma_channels = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) |
487 (inb(DMA2_STAT_REG) & 0xf0);
488 for(i=1;i<5;i++) {
489 int dma = dmatab[i];
490 if(test_bit(dma,&dma_channels) || request_dma(dma,"ni6510"))
491 continue;
492
493 flags=claim_dma_lock();
494 disable_dma(dma);
495 set_dma_mode(dma,DMA_MODE_CASCADE);
496 enable_dma(dma);
497 release_dma_lock(flags);
498
499 ni65_init_lance(p,dev->dev_addr,0,0); /* trigger memory access */
500
501 flags=claim_dma_lock();
502 disable_dma(dma);
503 free_dma(dma);
504 release_dma_lock(flags);
505
506 if(readreg(CSR0) & CSR0_IDON)
507 break;
508 }
509 if(i == 5) {
510 printk("failed.\n");
511 printk(KERN_ERR "%s: Can't detect DMA channel!\n", dev->name);
512 ni65_free_buffer(p);
513 release_region(ioaddr, cards[p->cardno].total_size);
514 return -EAGAIN;
515 }
516 dev->dma = dmatab[i];
517 printk("DMA %d (autodetected), ",dev->dma);
518 }
519 else
520 printk("DMA %d (assigned), ",dev->dma);
521
522 if(dev->irq < 2)
523 {
524 unsigned long irq_mask;
525
526 ni65_init_lance(p,dev->dev_addr,0,0);
527 irq_mask = probe_irq_on();
528 writereg(CSR0_INIT|CSR0_INEA,CSR0); /* trigger interrupt */
529 msleep(20);
530 dev->irq = probe_irq_off(irq_mask);
531 if(!dev->irq)
532 {
533 printk("Failed to detect IRQ line!\n");
534 ni65_free_buffer(p);
535 release_region(ioaddr, cards[p->cardno].total_size);
536 return -EAGAIN;
537 }
538 printk("IRQ %d (autodetected).\n",dev->irq);
539 }
540 else
541 printk("IRQ %d (assigned).\n",dev->irq);
542 }
543
544 if(request_dma(dev->dma, cards[p->cardno].cardname ) != 0)
545 {
546 printk(KERN_ERR "%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma);
547 ni65_free_buffer(p);
548 release_region(ioaddr, cards[p->cardno].total_size);
549 return -EAGAIN;
550 }
551
552 dev->base_addr = ioaddr;
553 dev->open = ni65_open;
554 dev->stop = ni65_close;
555 dev->hard_start_xmit = ni65_send_packet;
556 dev->tx_timeout = ni65_timeout;
557 dev->watchdog_timeo = HZ/2;
558 dev->get_stats = ni65_get_stats;
559 dev->set_multicast_list = set_multicast_list;
560 return 0; /* everything is OK */
561 }
562
563 /*
564 * set lance register and trigger init
565 */
566 static void ni65_init_lance(struct priv *p,unsigned char *daddr,int filter,int mode)
567 {
568 int i;
569 u32 pib;
570
571 writereg(CSR0_CLRALL|CSR0_STOP,CSR0);
572
573 for(i=0;i<6;i++)
574 p->ib.eaddr[i] = daddr[i];
575
576 for(i=0;i<8;i++)
577 p->ib.filter[i] = filter;
578 p->ib.mode = mode;
579
580 p->ib.trp = (u32) isa_virt_to_bus(p->tmdhead) | TMDNUMMASK;
581 p->ib.rrp = (u32) isa_virt_to_bus(p->rmdhead) | RMDNUMMASK;
582 writereg(0,CSR3); /* busmaster/no word-swap */
583 pib = (u32) isa_virt_to_bus(&p->ib);
584 writereg(pib & 0xffff,CSR1);
585 writereg(pib >> 16,CSR2);
586
587 writereg(CSR0_INIT,CSR0); /* this changes L_ADDRREG to CSR0 */
588
589 for(i=0;i<32;i++)
590 {
591 mdelay(4);
592 if(inw(PORT+L_DATAREG) & (CSR0_IDON | CSR0_MERR) )
593 break; /* init ok ? */
594 }
595 }
596
597 /*
598 * allocate memory area and check the 16MB border
599 */
600 static void *ni65_alloc_mem(struct net_device *dev,char *what,int size,int type)
601 {
602 struct sk_buff *skb=NULL;
603 unsigned char *ptr;
604 void *ret;
605
606 if(type) {
607 ret = skb = alloc_skb(2+16+size,GFP_KERNEL|GFP_DMA);
608 if(!skb) {
609 printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
610 return NULL;
611 }
612 skb_reserve(skb,2+16);
613 skb_put(skb,R_BUF_SIZE); /* grab the whole space .. (not necessary) */
614 ptr = skb->data;
615 }
616 else {
617 ret = ptr = kmalloc(T_BUF_SIZE,GFP_KERNEL | GFP_DMA);
618 if(!ret) {
619 printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
620 return NULL;
621 }
622 }
623 if( (u32) virt_to_phys(ptr+size) > 0x1000000) {
624 printk(KERN_WARNING "%s: unable to allocate %s memory in lower 16MB!\n",dev->name,what);
625 if(type)
626 kfree_skb(skb);
627 else
628 kfree(ptr);
629 return NULL;
630 }
631 return ret;
632 }
633
634 /*
635 * allocate all memory structures .. send/recv buffers etc ...
636 */
637 static int ni65_alloc_buffer(struct net_device *dev)
638 {
639 unsigned char *ptr;
640 struct priv *p;
641 int i;
642
643 /*
644 * we need 8-aligned memory ..
645 */
646 ptr = ni65_alloc_mem(dev,"BUFFER",sizeof(struct priv)+8,0);
647 if(!ptr)
648 return -ENOMEM;
649
650 p = dev->priv = (struct priv *) (((unsigned long) ptr + 7) & ~0x7);
651 memset((char *) dev->priv,0,sizeof(struct priv));
652 p->self = ptr;
653
654 for(i=0;i<TMDNUM;i++)
655 {
656 #ifdef XMT_VIA_SKB
657 p->tmd_skb[i] = NULL;
658 #endif
659 p->tmdbounce[i] = ni65_alloc_mem(dev,"XMIT",T_BUF_SIZE,0);
660 if(!p->tmdbounce[i]) {
661 ni65_free_buffer(p);
662 return -ENOMEM;
663 }
664 }
665
666 for(i=0;i<RMDNUM;i++)
667 {
668 #ifdef RCV_VIA_SKB
669 p->recv_skb[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,1);
670 if(!p->recv_skb[i]) {
671 ni65_free_buffer(p);
672 return -ENOMEM;
673 }
674 #else
675 p->recvbounce[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,0);
676 if(!p->recvbounce[i]) {
677 ni65_free_buffer(p);
678 return -ENOMEM;
679 }
680 #endif
681 }
682
683 return 0; /* everything is OK */
684 }
685
686 /*
687 * free buffers and private struct
688 */
689 static void ni65_free_buffer(struct priv *p)
690 {
691 int i;
692
693 if(!p)
694 return;
695
696 for(i=0;i<TMDNUM;i++) {
697 kfree(p->tmdbounce[i]);
698 #ifdef XMT_VIA_SKB
699 if(p->tmd_skb[i])
700 dev_kfree_skb(p->tmd_skb[i]);
701 #endif
702 }
703
704 for(i=0;i<RMDNUM;i++)
705 {
706 #ifdef RCV_VIA_SKB
707 if(p->recv_skb[i])
708 dev_kfree_skb(p->recv_skb[i]);
709 #else
710 kfree(p->recvbounce[i]);
711 #endif
712 }
713 kfree(p->self);
714 }
715
716
717 /*
718 * stop and (re)start lance .. e.g after an error
719 */
720 static void ni65_stop_start(struct net_device *dev,struct priv *p)
721 {
722 int csr0 = CSR0_INEA;
723
724 writedatareg(CSR0_STOP);
725
726 if(debuglevel > 1)
727 printk(KERN_DEBUG "ni65_stop_start\n");
728
729 if(p->features & INIT_RING_BEFORE_START) {
730 int i;
731 #ifdef XMT_VIA_SKB
732 struct sk_buff *skb_save[TMDNUM];
733 #endif
734 unsigned long buffer[TMDNUM];
735 short blen[TMDNUM];
736
737 if(p->xmit_queued) {
738 while(1) {
739 if((p->tmdhead[p->tmdlast].u.s.status & XMIT_OWN))
740 break;
741 p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
742 if(p->tmdlast == p->tmdnum)
743 break;
744 }
745 }
746
747 for(i=0;i<TMDNUM;i++) {
748 struct tmd *tmdp = p->tmdhead + i;
749 #ifdef XMT_VIA_SKB
750 skb_save[i] = p->tmd_skb[i];
751 #endif
752 buffer[i] = (u32) isa_bus_to_virt(tmdp->u.buffer);
753 blen[i] = tmdp->blen;
754 tmdp->u.s.status = 0x0;
755 }
756
757 for(i=0;i<RMDNUM;i++) {
758 struct rmd *rmdp = p->rmdhead + i;
759 rmdp->u.s.status = RCV_OWN;
760 }
761 p->tmdnum = p->xmit_queued = 0;
762 writedatareg(CSR0_STRT | csr0);
763
764 for(i=0;i<TMDNUM;i++) {
765 int num = (i + p->tmdlast) & (TMDNUM-1);
766 p->tmdhead[i].u.buffer = (u32) isa_virt_to_bus((char *)buffer[num]); /* status is part of buffer field */
767 p->tmdhead[i].blen = blen[num];
768 if(p->tmdhead[i].u.s.status & XMIT_OWN) {
769 p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
770 p->xmit_queued = 1;
771 writedatareg(CSR0_TDMD | CSR0_INEA | csr0);
772 }
773 #ifdef XMT_VIA_SKB
774 p->tmd_skb[i] = skb_save[num];
775 #endif
776 }
777 p->rmdnum = p->tmdlast = 0;
778 if(!p->lock)
779 if (p->tmdnum || !p->xmit_queued)
780 netif_wake_queue(dev);
781 dev->trans_start = jiffies;
782 }
783 else
784 writedatareg(CSR0_STRT | csr0);
785 }
786
787 /*
788 * init lance (write init-values .. init-buffers) (open-helper)
789 */
790 static int ni65_lance_reinit(struct net_device *dev)
791 {
792 int i;
793 struct priv *p = (struct priv *) dev->priv;
794 unsigned long flags;
795
796 p->lock = 0;
797 p->xmit_queued = 0;
798
799 flags=claim_dma_lock();
800 disable_dma(dev->dma); /* I've never worked with dma, but we do it like the packetdriver */
801 set_dma_mode(dev->dma,DMA_MODE_CASCADE);
802 enable_dma(dev->dma);
803 release_dma_lock(flags);
804
805 outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
806 if( (i=readreg(CSR0) ) != 0x4)
807 {
808 printk(KERN_ERR "%s: can't RESET %s card: %04x\n",dev->name,
809 cards[p->cardno].cardname,(int) i);
810 flags=claim_dma_lock();
811 disable_dma(dev->dma);
812 release_dma_lock(flags);
813 return 0;
814 }
815
816 p->rmdnum = p->tmdnum = p->tmdlast = p->tmdbouncenum = 0;
817 for(i=0;i<TMDNUM;i++)
818 {
819 struct tmd *tmdp = p->tmdhead + i;
820 #ifdef XMT_VIA_SKB
821 if(p->tmd_skb[i]) {
822 dev_kfree_skb(p->tmd_skb[i]);
823 p->tmd_skb[i] = NULL;
824 }
825 #endif
826 tmdp->u.buffer = 0x0;
827 tmdp->u.s.status = XMIT_START | XMIT_END;
828 tmdp->blen = tmdp->status2 = 0;
829 }
830
831 for(i=0;i<RMDNUM;i++)
832 {
833 struct rmd *rmdp = p->rmdhead + i;
834 #ifdef RCV_VIA_SKB
835 rmdp->u.buffer = (u32) isa_virt_to_bus(p->recv_skb[i]->data);
836 #else
837 rmdp->u.buffer = (u32) isa_virt_to_bus(p->recvbounce[i]);
838 #endif
839 rmdp->blen = -(R_BUF_SIZE-8);
840 rmdp->mlen = 0;
841 rmdp->u.s.status = RCV_OWN;
842 }
843
844 if(dev->flags & IFF_PROMISC)
845 ni65_init_lance(p,dev->dev_addr,0x00,M_PROM);
846 else if(dev->mc_count || dev->flags & IFF_ALLMULTI)
847 ni65_init_lance(p,dev->dev_addr,0xff,0x0);
848 else
849 ni65_init_lance(p,dev->dev_addr,0x00,0x00);
850
851 /*
852 * ni65_set_lance_mem() sets L_ADDRREG to CSR0
853 * NOW, WE WILL NEVER CHANGE THE L_ADDRREG, CSR0 IS ALWAYS SELECTED
854 */
855
856 if(inw(PORT+L_DATAREG) & CSR0_IDON) {
857 ni65_set_performance(p);
858 /* init OK: start lance , enable interrupts */
859 writedatareg(CSR0_CLRALL | CSR0_INEA | CSR0_STRT);
860 return 1; /* ->OK */
861 }
862 printk(KERN_ERR "%s: can't init lance, status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG));
863 flags=claim_dma_lock();
864 disable_dma(dev->dma);
865 release_dma_lock(flags);
866 return 0; /* ->Error */
867 }
868
869 /*
870 * interrupt handler
871 */
872 static irqreturn_t ni65_interrupt(int irq, void * dev_id)
873 {
874 int csr0 = 0;
875 struct net_device *dev = dev_id;
876 struct priv *p;
877 int bcnt = 32;
878
879 p = (struct priv *) dev->priv;
880
881 spin_lock(&p->ring_lock);
882
883 while(--bcnt) {
884 csr0 = inw(PORT+L_DATAREG);
885
886 #if 0
887 writedatareg( (csr0 & CSR0_CLRALL) ); /* ack interrupts, disable int. */
888 #else
889 writedatareg( (csr0 & CSR0_CLRALL) | CSR0_INEA ); /* ack interrupts, interrupts enabled */
890 #endif
891
892 if(!(csr0 & (CSR0_ERR | CSR0_RINT | CSR0_TINT)))
893 break;
894
895 if(csr0 & CSR0_RINT) /* RECV-int? */
896 ni65_recv_intr(dev,csr0);
897 if(csr0 & CSR0_TINT) /* XMIT-int? */
898 ni65_xmit_intr(dev,csr0);
899
900 if(csr0 & CSR0_ERR)
901 {
902 struct priv *p = (struct priv *) dev->priv;
903 if(debuglevel > 1)
904 printk(KERN_ERR "%s: general error: %04x.\n",dev->name,csr0);
905 if(csr0 & CSR0_BABL)
906 p->stats.tx_errors++;
907 if(csr0 & CSR0_MISS) {
908 int i;
909 for(i=0;i<RMDNUM;i++)
910 printk("%02x ",p->rmdhead[i].u.s.status);
911 printk("\n");
912 p->stats.rx_errors++;
913 }
914 if(csr0 & CSR0_MERR) {
915 if(debuglevel > 1)
916 printk(KERN_ERR "%s: Ooops .. memory error: %04x.\n",dev->name,csr0);
917 ni65_stop_start(dev,p);
918 }
919 }
920 }
921
922 #ifdef RCV_PARANOIA_CHECK
923 {
924 int j;
925 for(j=0;j<RMDNUM;j++)
926 {
927 struct priv *p = (struct priv *) dev->priv;
928 int i,k,num1,num2;
929 for(i=RMDNUM-1;i>0;i--) {
930 num2 = (p->rmdnum + i) & (RMDNUM-1);
931 if(!(p->rmdhead[num2].u.s.status & RCV_OWN))
932 break;
933 }
934
935 if(i) {
936 for(k=0;k<RMDNUM;k++) {
937 num1 = (p->rmdnum + k) & (RMDNUM-1);
938 if(!(p->rmdhead[num1].u.s.status & RCV_OWN))
939 break;
940 }
941 if(!k)
942 break;
943
944 if(debuglevel > 0)
945 {
946 char buf[256],*buf1;
947 int k;
948 buf1 = buf;
949 for(k=0;k<RMDNUM;k++) {
950 sprintf(buf1,"%02x ",(p->rmdhead[k].u.s.status)); /* & RCV_OWN) ); */
951 buf1 += 3;
952 }
953 *buf1 = 0;
954 printk(KERN_ERR "%s: Ooops, receive ring corrupted %2d %2d | %s\n",dev->name,p->rmdnum,i,buf);
955 }
956
957 p->rmdnum = num1;
958 ni65_recv_intr(dev,csr0);
959 if((p->rmdhead[num2].u.s.status & RCV_OWN))
960 break; /* ok, we are 'in sync' again */
961 }
962 else
963 break;
964 }
965 }
966 #endif
967
968 if( (csr0 & (CSR0_RXON | CSR0_TXON)) != (CSR0_RXON | CSR0_TXON) ) {
969 printk(KERN_DEBUG "%s: RX or TX was offline -> restart\n",dev->name);
970 ni65_stop_start(dev,p);
971 }
972 else
973 writedatareg(CSR0_INEA);
974
975 spin_unlock(&p->ring_lock);
976 return IRQ_HANDLED;
977 }
978
979 /*
980 * We have received an Xmit-Interrupt ..
981 * send a new packet if necessary
982 */
983 static void ni65_xmit_intr(struct net_device *dev,int csr0)
984 {
985 struct priv *p = (struct priv *) dev->priv;
986
987 while(p->xmit_queued)
988 {
989 struct tmd *tmdp = p->tmdhead + p->tmdlast;
990 int tmdstat = tmdp->u.s.status;
991
992 if(tmdstat & XMIT_OWN)
993 break;
994
995 if(tmdstat & XMIT_ERR)
996 {
997 #if 0
998 if(tmdp->status2 & XMIT_TDRMASK && debuglevel > 3)
999 printk(KERN_ERR "%s: tdr-problems (e.g. no resistor)\n",dev->name);
1000 #endif
1001 /* checking some errors */
1002 if(tmdp->status2 & XMIT_RTRY)
1003 p->stats.tx_aborted_errors++;
1004 if(tmdp->status2 & XMIT_LCAR)
1005 p->stats.tx_carrier_errors++;
1006 if(tmdp->status2 & (XMIT_BUFF | XMIT_UFLO )) {
1007 /* this stops the xmitter */
1008 p->stats.tx_fifo_errors++;
1009 if(debuglevel > 0)
1010 printk(KERN_ERR "%s: Xmit FIFO/BUFF error\n",dev->name);
1011 if(p->features & INIT_RING_BEFORE_START) {
1012 tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END; /* test: resend this frame */
1013 ni65_stop_start(dev,p);
1014 break; /* no more Xmit processing .. */
1015 }
1016 else
1017 ni65_stop_start(dev,p);
1018 }
1019 if(debuglevel > 2)
1020 printk(KERN_ERR "%s: xmit-error: %04x %02x-%04x\n",dev->name,csr0,(int) tmdstat,(int) tmdp->status2);
1021 if(!(csr0 & CSR0_BABL)) /* don't count errors twice */
1022 p->stats.tx_errors++;
1023 tmdp->status2 = 0;
1024 }
1025 else {
1026 p->stats.tx_bytes -= (short)(tmdp->blen);
1027 p->stats.tx_packets++;
1028 }
1029
1030 #ifdef XMT_VIA_SKB
1031 if(p->tmd_skb[p->tmdlast]) {
1032 dev_kfree_skb_irq(p->tmd_skb[p->tmdlast]);
1033 p->tmd_skb[p->tmdlast] = NULL;
1034 }
1035 #endif
1036
1037 p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
1038 if(p->tmdlast == p->tmdnum)
1039 p->xmit_queued = 0;
1040 }
1041 netif_wake_queue(dev);
1042 }
1043
1044 /*
1045 * We have received a packet
1046 */
1047 static void ni65_recv_intr(struct net_device *dev,int csr0)
1048 {
1049 struct rmd *rmdp;
1050 int rmdstat,len;
1051 int cnt=0;
1052 struct priv *p = (struct priv *) dev->priv;
1053
1054 rmdp = p->rmdhead + p->rmdnum;
1055 while(!( (rmdstat = rmdp->u.s.status) & RCV_OWN))
1056 {
1057 cnt++;
1058 if( (rmdstat & (RCV_START | RCV_END | RCV_ERR)) != (RCV_START | RCV_END) ) /* error or oversized? */
1059 {
1060 if(!(rmdstat & RCV_ERR)) {
1061 if(rmdstat & RCV_START)
1062 {
1063 p->stats.rx_length_errors++;
1064 printk(KERN_ERR "%s: recv, packet too long: %d\n",dev->name,rmdp->mlen & 0x0fff);
1065 }
1066 }
1067 else {
1068 if(debuglevel > 2)
1069 printk(KERN_ERR "%s: receive-error: %04x, lance-status: %04x/%04x\n",
1070 dev->name,(int) rmdstat,csr0,(int) inw(PORT+L_DATAREG) );
1071 if(rmdstat & RCV_FRAM)
1072 p->stats.rx_frame_errors++;
1073 if(rmdstat & RCV_OFLO)
1074 p->stats.rx_over_errors++;
1075 if(rmdstat & RCV_CRC)
1076 p->stats.rx_crc_errors++;
1077 if(rmdstat & RCV_BUF_ERR)
1078 p->stats.rx_fifo_errors++;
1079 }
1080 if(!(csr0 & CSR0_MISS)) /* don't count errors twice */
1081 p->stats.rx_errors++;
1082 }
1083 else if( (len = (rmdp->mlen & 0x0fff) - 4) >= 60)
1084 {
1085 #ifdef RCV_VIA_SKB
1086 struct sk_buff *skb = alloc_skb(R_BUF_SIZE+2+16,GFP_ATOMIC);
1087 if (skb)
1088 skb_reserve(skb,16);
1089 #else
1090 struct sk_buff *skb = dev_alloc_skb(len+2);
1091 #endif
1092 if(skb)
1093 {
1094 skb_reserve(skb,2);
1095 #ifdef RCV_VIA_SKB
1096 if( (unsigned long) (skb->data + R_BUF_SIZE) > 0x1000000) {
1097 skb_put(skb,len);
1098 skb_copy_to_linear_data(skb, (unsigned char *)(p->recv_skb[p->rmdnum]->data),len);
1099 }
1100 else {
1101 struct sk_buff *skb1 = p->recv_skb[p->rmdnum];
1102 skb_put(skb,R_BUF_SIZE);
1103 p->recv_skb[p->rmdnum] = skb;
1104 rmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
1105 skb = skb1;
1106 skb_trim(skb,len);
1107 }
1108 #else
1109 skb_put(skb,len);
1110 skb_copy_to_linear_data(skb, (unsigned char *) p->recvbounce[p->rmdnum],len);
1111 #endif
1112 p->stats.rx_packets++;
1113 p->stats.rx_bytes += len;
1114 skb->protocol=eth_type_trans(skb,dev);
1115 netif_rx(skb);
1116 dev->last_rx = jiffies;
1117 }
1118 else
1119 {
1120 printk(KERN_ERR "%s: can't alloc new sk_buff\n",dev->name);
1121 p->stats.rx_dropped++;
1122 }
1123 }
1124 else {
1125 printk(KERN_INFO "%s: received runt packet\n",dev->name);
1126 p->stats.rx_errors++;
1127 }
1128 rmdp->blen = -(R_BUF_SIZE-8);
1129 rmdp->mlen = 0;
1130 rmdp->u.s.status = RCV_OWN; /* change owner */
1131 p->rmdnum = (p->rmdnum + 1) & (RMDNUM-1);
1132 rmdp = p->rmdhead + p->rmdnum;
1133 }
1134 }
1135
1136 /*
1137 * kick xmitter ..
1138 */
1139
1140 static void ni65_timeout(struct net_device *dev)
1141 {
1142 int i;
1143 struct priv *p = (struct priv *) dev->priv;
1144
1145 printk(KERN_ERR "%s: xmitter timed out, try to restart!\n",dev->name);
1146 for(i=0;i<TMDNUM;i++)
1147 printk("%02x ",p->tmdhead[i].u.s.status);
1148 printk("\n");
1149 ni65_lance_reinit(dev);
1150 dev->trans_start = jiffies;
1151 netif_wake_queue(dev);
1152 }
1153
1154 /*
1155 * Send a packet
1156 */
1157
1158 static int ni65_send_packet(struct sk_buff *skb, struct net_device *dev)
1159 {
1160 struct priv *p = (struct priv *) dev->priv;
1161
1162 netif_stop_queue(dev);
1163
1164 if (test_and_set_bit(0, (void*)&p->lock)) {
1165 printk(KERN_ERR "%s: Queue was locked.\n", dev->name);
1166 return 1;
1167 }
1168
1169 {
1170 short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
1171 struct tmd *tmdp;
1172 unsigned long flags;
1173
1174 #ifdef XMT_VIA_SKB
1175 if( (unsigned long) (skb->data + skb->len) > 0x1000000) {
1176 #endif
1177
1178 skb_copy_from_linear_data(skb, p->tmdbounce[p->tmdbouncenum],
1179 skb->len > T_BUF_SIZE ? T_BUF_SIZE :
1180 skb->len);
1181 if (len > skb->len)
1182 memset((char *)p->tmdbounce[p->tmdbouncenum]+skb->len, 0, len-skb->len);
1183 dev_kfree_skb (skb);
1184
1185 spin_lock_irqsave(&p->ring_lock, flags);
1186 tmdp = p->tmdhead + p->tmdnum;
1187 tmdp->u.buffer = (u32) isa_virt_to_bus(p->tmdbounce[p->tmdbouncenum]);
1188 p->tmdbouncenum = (p->tmdbouncenum + 1) & (TMDNUM - 1);
1189
1190 #ifdef XMT_VIA_SKB
1191 }
1192 else {
1193 spin_lock_irqsave(&p->ring_lock, flags);
1194
1195 tmdp = p->tmdhead + p->tmdnum;
1196 tmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
1197 p->tmd_skb[p->tmdnum] = skb;
1198 }
1199 #endif
1200 tmdp->blen = -len;
1201
1202 tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;
1203 writedatareg(CSR0_TDMD | CSR0_INEA); /* enable xmit & interrupt */
1204
1205 p->xmit_queued = 1;
1206 p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
1207
1208 if(p->tmdnum != p->tmdlast)
1209 netif_wake_queue(dev);
1210
1211 p->lock = 0;
1212 dev->trans_start = jiffies;
1213
1214 spin_unlock_irqrestore(&p->ring_lock, flags);
1215 }
1216
1217 return 0;
1218 }
1219
1220 static struct net_device_stats *ni65_get_stats(struct net_device *dev)
1221 {
1222
1223 #if 0
1224 int i;
1225 struct priv *p = (struct priv *) dev->priv;
1226 for(i=0;i<RMDNUM;i++)
1227 {
1228 struct rmd *rmdp = p->rmdhead + ((p->rmdnum + i) & (RMDNUM-1));
1229 printk("%02x ",rmdp->u.s.status);
1230 }
1231 printk("\n");
1232 #endif
1233
1234 return &((struct priv *) dev->priv)->stats;
1235 }
1236
1237 static void set_multicast_list(struct net_device *dev)
1238 {
1239 if(!ni65_lance_reinit(dev))
1240 printk(KERN_ERR "%s: Can't switch card into MC mode!\n",dev->name);
1241 netif_wake_queue(dev);
1242 }
1243
1244 #ifdef MODULE
1245 static struct net_device *dev_ni65;
1246
1247 module_param(irq, int, 0);
1248 module_param(io, int, 0);
1249 module_param(dma, int, 0);
1250 MODULE_PARM_DESC(irq, "ni6510 IRQ number (ignored for some cards)");
1251 MODULE_PARM_DESC(io, "ni6510 I/O base address");
1252 MODULE_PARM_DESC(dma, "ni6510 ISA DMA channel (ignored for some cards)");
1253
1254 int __init init_module(void)
1255 {
1256 dev_ni65 = ni65_probe(-1);
1257 return IS_ERR(dev_ni65) ? PTR_ERR(dev_ni65) : 0;
1258 }
1259
1260 void __exit cleanup_module(void)
1261 {
1262 unregister_netdev(dev_ni65);
1263 cleanup_card(dev_ni65);
1264 free_netdev(dev_ni65);
1265 }
1266 #endif /* MODULE */
1267
1268 MODULE_LICENSE("GPL");
1269
1270 /*
1271 * END of ni65.c
1272 */
A Kernel for the Dreambox dm7025.