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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / ethernet / amd / ni65.c
blobc38edf6f03a32577e08971d66a09b2c8c24fd9dc
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 * driver probes: io: 0x360,0x300,0x320,0x340 / dma: 3,5,6,7
11 *
12 * This is an extension to the Linux operating system, and is covered by the
13 * same GNU General Public License that covers the Linux-kernel.
14 *
15 * comments/bugs/suggestions can be sent to:
16 * Michael Hipp
17 * email: hippm@informatik.uni-tuebingen.de
18 *
19 * sources:
20 * some things are from the 'ni6510-packet-driver for dos by Russ Nelson'
21 * and from the original drivers by D.Becker
22 *
23 * known problems:
24 * - on some PCI boards (including my own) the card/board/ISA-bridge has
25 * problems with bus master DMA. This results in lotsa overruns.
26 * It may help to '#define RCV_PARANOIA_CHECK' or try to #undef
27 * the XMT and RCV_VIA_SKB option .. this reduces driver performance.
28 * Or just play with your BIOS options to optimize ISA-DMA access.
29 * Maybe you also wanna play with the LOW_PERFORAMCE and MID_PERFORMANCE
30 * defines -> please report me your experience then
31 * - Harald reported for ASUS SP3G mainboards, that you should use
32 * the 'optimal settings' from the user's manual on page 3-12!
33 *
34 * credits:
35 * thanx to Jason Sullivan for sending me a ni6510 card!
36 * lot of debug runs with ASUS SP3G Boards (Intel Saturn) by Harald Koenig
37 *
38 * simple performance test: (486DX-33/Ni6510-EB receives from 486DX4-100/Ni6510-EB)
39 * average: FTP -> 8384421 bytes received in 8.5 seconds
40 * (no RCV_VIA_SKB,no XMT_VIA_SKB,PARANOIA_CHECK,4 XMIT BUFS, 8 RCV_BUFFS)
41 * peak: FTP -> 8384421 bytes received in 7.5 seconds
42 * (RCV_VIA_SKB,XMT_VIA_SKB,no PARANOIA_CHECK,1(!) XMIT BUF, 16 RCV BUFFS)
43 */
44
45 /*
46 * 99.Jun.8: added support for /proc/net/dev byte count for xosview (HK)
47 * 96.Sept.29: virt_to_bus stuff added for new memory modell
48 * 96.April.29: Added Harald Koenig's Patches (MH)
49 * 96.April.13: enhanced error handling .. more tests (MH)
50 * 96.April.5/6: a lot of performance tests. Got it stable now (hopefully) (MH)
51 * 96.April.1: (no joke ;) .. added EtherBlaster and Module support (MH)
52 * 96.Feb.19: fixed a few bugs .. cleanups .. tested for 1.3.66 (MH)
53 * hopefully no more 16MB limit
54 *
55 * 95.Nov.18: multicast tweaked (AC).
56 *
57 * 94.Aug.22: changes in xmit_intr (ack more than one xmitted-packet), ni65_send_packet (p->lock) (MH)
58 *
59 * 94.July.16: fixed bugs in recv_skb and skb-alloc stuff (MH)
60 */
61
62 #include <linux/kernel.h>
63 #include <linux/string.h>
64 #include <linux/errno.h>
65 #include <linux/ioport.h>
66 #include <linux/slab.h>
67 #include <linux/interrupt.h>
68 #include <linux/delay.h>
69 #include <linux/init.h>
70 #include <linux/netdevice.h>
71 #include <linux/etherdevice.h>
72 #include <linux/skbuff.h>
73 #include <linux/module.h>
74 #include <linux/bitops.h>
75
76 #include <asm/io.h>
77 #include <asm/dma.h>
78
79 #include "ni65.h"
80
81 /*
82 * the current setting allows an acceptable performance
83 * for 'RCV_PARANOIA_CHECK' read the 'known problems' part in
84 * the header of this file
85 * 'invert' the defines for max. performance. This may cause DMA problems
86 * on some boards (e.g on my ASUS SP3G)
87 */
88 #undef XMT_VIA_SKB
89 #undef RCV_VIA_SKB
90 #define RCV_PARANOIA_CHECK
91
92 #define MID_PERFORMANCE
93
94 #if defined( LOW_PERFORMANCE )
95 static int isa0=7,isa1=7,csr80=0x0c10;
96 #elif defined( MID_PERFORMANCE )
97 static int isa0=5,isa1=5,csr80=0x2810;
98 #else /* high performance */
99 static int isa0=4,isa1=4,csr80=0x0017;
100 #endif
101
102 /*
103 * a few card/vendor specific defines
104 */
105 #define NI65_ID0 0x00
106 #define NI65_ID1 0x55
107 #define NI65_EB_ID0 0x52
108 #define NI65_EB_ID1 0x44
109 #define NE2100_ID0 0x57
110 #define NE2100_ID1 0x57
111
112 #define PORT p->cmdr_addr
113
114 /*
115 * buffer configuration
116 */
117 #if 1
118 #define RMDNUM 16
119 #define RMDNUMMASK 0x80000000
120 #else
121 #define RMDNUM 8
122 #define RMDNUMMASK 0x60000000 /* log2(RMDNUM)<<29 */
123 #endif
124
125 #if 0
126 #define TMDNUM 1
127 #define TMDNUMMASK 0x00000000
128 #else
129 #define TMDNUM 4
130 #define TMDNUMMASK 0x40000000 /* log2(TMDNUM)<<29 */
131 #endif
132
133 /* slightly oversized */
134 #define R_BUF_SIZE 1544
135 #define T_BUF_SIZE 1544
136
137 /*
138 * lance register defines
139 */
140 #define L_DATAREG 0x00
141 #define L_ADDRREG 0x02
142 #define L_RESET 0x04
143 #define L_CONFIG 0x05
144 #define L_BUSIF 0x06
145
146 /*
147 * to access the lance/am7990-regs, you have to write
148 * reg-number into L_ADDRREG, then you can access it using L_DATAREG
149 */
150 #define CSR0 0x00
151 #define CSR1 0x01
152 #define CSR2 0x02
153 #define CSR3 0x03
154
155 #define INIT_RING_BEFORE_START 0x1
156 #define FULL_RESET_ON_ERROR 0x2
157
158 #if 0
159 #define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);inw(PORT+L_ADDRREG); \
160 outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
161 #define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_ADDRREG),\
162 inw(PORT+L_DATAREG))
163 #if 0
164 #define writedatareg(val) {outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
165 #else
166 #define writedatareg(val) { writereg(val,CSR0); }
167 #endif
168 #else
169 #define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);outw(val,PORT+L_DATAREG);}
170 #define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_DATAREG))
171 #define writedatareg(val) { writereg(val,CSR0); }
172 #endif
173
174 static unsigned char ni_vendor[] = { 0x02,0x07,0x01 };
175
176 static struct card {
177 unsigned char id0,id1;
178 short id_offset;
179 short total_size;
180 short cmd_offset;
181 short addr_offset;
182 unsigned char *vendor_id;
183 char *cardname;
184 unsigned long config;
185 } cards[] = {
186 {
187 .id0 = NI65_ID0,
188 .id1 = NI65_ID1,
189 .id_offset = 0x0e,
190 .total_size = 0x10,
191 .cmd_offset = 0x0,
192 .addr_offset = 0x8,
193 .vendor_id = ni_vendor,
194 .cardname = "ni6510",
195 .config = 0x1,
196 },
197 {
198 .id0 = NI65_EB_ID0,
199 .id1 = NI65_EB_ID1,
200 .id_offset = 0x0e,
201 .total_size = 0x18,
202 .cmd_offset = 0x10,
203 .addr_offset = 0x0,
204 .vendor_id = ni_vendor,
205 .cardname = "ni6510 EtherBlaster",
206 .config = 0x2,
207 },
208 {
209 .id0 = NE2100_ID0,
210 .id1 = NE2100_ID1,
211 .id_offset = 0x0e,
212 .total_size = 0x18,
213 .cmd_offset = 0x10,
214 .addr_offset = 0x0,
215 .vendor_id = NULL,
216 .cardname = "generic NE2100",
217 .config = 0x0,
218 },
219 };
220 #define NUM_CARDS 3
221
222 struct priv
223 {
224 struct rmd rmdhead[RMDNUM];
225 struct tmd tmdhead[TMDNUM];
226 struct init_block ib;
227 int rmdnum;
228 int tmdnum,tmdlast;
229 #ifdef RCV_VIA_SKB
230 struct sk_buff *recv_skb[RMDNUM];
231 #else
232 void *recvbounce[RMDNUM];
233 #endif
234 #ifdef XMT_VIA_SKB
235 struct sk_buff *tmd_skb[TMDNUM];
236 #endif
237 void *tmdbounce[TMDNUM];
238 int tmdbouncenum;
239 int lock,xmit_queued;
240
241 void *self;
242 int cmdr_addr;
243 int cardno;
244 int features;
245 spinlock_t ring_lock;
246 };
247
248 static int ni65_probe1(struct net_device *dev,int);
249 static irqreturn_t ni65_interrupt(int irq, void * dev_id);
250 static void ni65_recv_intr(struct net_device *dev,int);
251 static void ni65_xmit_intr(struct net_device *dev,int);
252 static int ni65_open(struct net_device *dev);
253 static int ni65_lance_reinit(struct net_device *dev);
254 static void ni65_init_lance(struct priv *p,unsigned char*,int,int);
255 static netdev_tx_t ni65_send_packet(struct sk_buff *skb,
256 struct net_device *dev);
257 static void ni65_timeout(struct net_device *dev, unsigned int txqueue);
258 static int ni65_close(struct net_device *dev);
259 static int ni65_alloc_buffer(struct net_device *dev);
260 static void ni65_free_buffer(struct priv *p);
261 static void set_multicast_list(struct net_device *dev);
262
263 static int irqtab[] __initdata = { 9,12,15,5 }; /* irq config-translate */
264 static int dmatab[] __initdata = { 0,3,5,6,7 }; /* dma config-translate and autodetect */
265
266 static int debuglevel = 1;
267
268 /*
269 * set 'performance' registers .. we must STOP lance for that
270 */
271 static void ni65_set_performance(struct priv *p)
272 {
273 writereg(CSR0_STOP | CSR0_CLRALL,CSR0); /* STOP */
274
275 if( !(cards[p->cardno].config & 0x02) )
276 return;
277
278 outw(80,PORT+L_ADDRREG);
279 if(inw(PORT+L_ADDRREG) != 80)
280 return;
281
282 writereg( (csr80 & 0x3fff) ,80); /* FIFO watermarks */
283 outw(0,PORT+L_ADDRREG);
284 outw((short)isa0,PORT+L_BUSIF); /* write ISA 0: DMA_R : isa0 * 50ns */
285 outw(1,PORT+L_ADDRREG);
286 outw((short)isa1,PORT+L_BUSIF); /* write ISA 1: DMA_W : isa1 * 50ns */
287
288 outw(CSR0,PORT+L_ADDRREG); /* switch back to CSR0 */
289 }
290
291 /*
292 * open interface (up)
293 */
294 static int ni65_open(struct net_device *dev)
295 {
296 struct priv *p = dev->ml_priv;
297 int irqval = request_irq(dev->irq, ni65_interrupt,0,
298 cards[p->cardno].cardname,dev);
299 if (irqval) {
300 printk(KERN_ERR "%s: unable to get IRQ %d (irqval=%d).\n",
301 dev->name,dev->irq, irqval);
302 return -EAGAIN;
303 }
304
305 if(ni65_lance_reinit(dev))
306 {
307 netif_start_queue(dev);
308 return 0;
309 }
310 else
311 {
312 free_irq(dev->irq,dev);
313 return -EAGAIN;
314 }
315 }
316
317 /*
318 * close interface (down)
319 */
320 static int ni65_close(struct net_device *dev)
321 {
322 struct priv *p = dev->ml_priv;
323
324 netif_stop_queue(dev);
325
326 outw(inw(PORT+L_RESET),PORT+L_RESET); /* that's the hard way */
327
328 #ifdef XMT_VIA_SKB
329 {
330 int i;
331 for(i=0;i<TMDNUM;i++)
332 {
333 if(p->tmd_skb[i]) {
334 dev_kfree_skb(p->tmd_skb[i]);
335 p->tmd_skb[i] = NULL;
336 }
337 }
338 }
339 #endif
340 free_irq(dev->irq,dev);
341 return 0;
342 }
343
344 static void cleanup_card(struct net_device *dev)
345 {
346 struct priv *p = dev->ml_priv;
347 disable_dma(dev->dma);
348 free_dma(dev->dma);
349 release_region(dev->base_addr, cards[p->cardno].total_size);
350 ni65_free_buffer(p);
351 }
352
353 /* set: io,irq,dma or set it when calling insmod */
354 static int irq;
355 static int io;
356 static int dma;
357
358 /*
359 * Probe The Card (not the lance-chip)
360 */
361 struct net_device * __init ni65_probe(int unit)
362 {
363 struct net_device *dev = alloc_etherdev(0);
364 static const int ports[] = { 0x360, 0x300, 0x320, 0x340, 0 };
365 const int *port;
366 int err = 0;
367
368 if (!dev)
369 return ERR_PTR(-ENOMEM);
370
371 if (unit >= 0) {
372 sprintf(dev->name, "eth%d", unit);
373 netdev_boot_setup_check(dev);
374 irq = dev->irq;
375 dma = dev->dma;
376 } else {
377 dev->base_addr = io;
378 }
379
380 if (dev->base_addr > 0x1ff) { /* Check a single specified location. */
381 err = ni65_probe1(dev, dev->base_addr);
382 } else if (dev->base_addr > 0) { /* Don't probe at all. */
383 err = -ENXIO;
384 } else {
385 for (port = ports; *port && ni65_probe1(dev, *port); port++)
386 ;
387 if (!*port)
388 err = -ENODEV;
389 }
390 if (err)
391 goto out;
392
393 err = register_netdev(dev);
394 if (err)
395 goto out1;
396 return dev;
397 out1:
398 cleanup_card(dev);
399 out:
400 free_netdev(dev);
401 return ERR_PTR(err);
402 }
403
404 static const struct net_device_ops ni65_netdev_ops = {
405 .ndo_open = ni65_open,
406 .ndo_stop = ni65_close,
407 .ndo_start_xmit = ni65_send_packet,
408 .ndo_tx_timeout = ni65_timeout,
409 .ndo_set_rx_mode = set_multicast_list,
410 .ndo_set_mac_address = eth_mac_addr,
411 .ndo_validate_addr = eth_validate_addr,
412 };
413
414 /*
415 * this is the real card probe ..
416 */
417 static int __init ni65_probe1(struct net_device *dev,int ioaddr)
418 {
419 int i,j;
420 struct priv *p;
421 unsigned long flags;
422
423 dev->irq = irq;
424 dev->dma = dma;
425
426 for(i=0;i<NUM_CARDS;i++) {
427 if(!request_region(ioaddr, cards[i].total_size, cards[i].cardname))
428 continue;
429 if(cards[i].id_offset >= 0) {
430 if(inb(ioaddr+cards[i].id_offset+0) != cards[i].id0 ||
431 inb(ioaddr+cards[i].id_offset+1) != cards[i].id1) {
432 release_region(ioaddr, cards[i].total_size);
433 continue;
434 }
435 }
436 if(cards[i].vendor_id) {
437 for(j=0;j<3;j++)
438 if(inb(ioaddr+cards[i].addr_offset+j) != cards[i].vendor_id[j])
439 release_region(ioaddr, cards[i].total_size);
440 }
441 break;
442 }
443 if(i == NUM_CARDS)
444 return -ENODEV;
445
446 for(j=0;j<6;j++)
447 dev->dev_addr[j] = inb(ioaddr+cards[i].addr_offset+j);
448
449 if( (j=ni65_alloc_buffer(dev)) < 0) {
450 release_region(ioaddr, cards[i].total_size);
451 return j;
452 }
453 p = dev->ml_priv;
454 p->cmdr_addr = ioaddr + cards[i].cmd_offset;
455 p->cardno = i;
456 spin_lock_init(&p->ring_lock);
457
458 printk(KERN_INFO "%s: %s found at %#3x, ", dev->name, cards[p->cardno].cardname , ioaddr);
459
460 outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
461 if( (j=readreg(CSR0)) != 0x4) {
462 printk("failed.\n");
463 printk(KERN_ERR "%s: Can't RESET card: %04x\n", dev->name, j);
464 ni65_free_buffer(p);
465 release_region(ioaddr, cards[p->cardno].total_size);
466 return -EAGAIN;
467 }
468
469 outw(88,PORT+L_ADDRREG);
470 if(inw(PORT+L_ADDRREG) == 88) {
471 unsigned long v;
472 v = inw(PORT+L_DATAREG);
473 v <<= 16;
474 outw(89,PORT+L_ADDRREG);
475 v |= inw(PORT+L_DATAREG);
476 printk("Version %#08lx, ",v);
477 p->features = INIT_RING_BEFORE_START;
478 }
479 else {
480 printk("ancient LANCE, ");
481 p->features = 0x0;
482 }
483
484 if(test_bit(0,&cards[i].config)) {
485 dev->irq = irqtab[(inw(ioaddr+L_CONFIG)>>2)&3];
486 dev->dma = dmatab[inw(ioaddr+L_CONFIG)&3];
487 printk("IRQ %d (from card), DMA %d (from card).\n",dev->irq,dev->dma);
488 }
489 else {
490 if(dev->dma == 0) {
491 /* 'stuck test' from lance.c */
492 unsigned long dma_channels =
493 ((inb(DMA1_STAT_REG) >> 4) & 0x0f)
494 | (inb(DMA2_STAT_REG) & 0xf0);
495 for(i=1;i<5;i++) {
496 int dma = dmatab[i];
497 if(test_bit(dma,&dma_channels) || request_dma(dma,"ni6510"))
498 continue;
499
500 flags=claim_dma_lock();
501 disable_dma(dma);
502 set_dma_mode(dma,DMA_MODE_CASCADE);
503 enable_dma(dma);
504 release_dma_lock(flags);
505
506 ni65_init_lance(p,dev->dev_addr,0,0); /* trigger memory access */
507
508 flags=claim_dma_lock();
509 disable_dma(dma);
510 free_dma(dma);
511 release_dma_lock(flags);
512
513 if(readreg(CSR0) & CSR0_IDON)
514 break;
515 }
516 if(i == 5) {
517 printk("failed.\n");
518 printk(KERN_ERR "%s: Can't detect DMA channel!\n", dev->name);
519 ni65_free_buffer(p);
520 release_region(ioaddr, cards[p->cardno].total_size);
521 return -EAGAIN;
522 }
523 dev->dma = dmatab[i];
524 printk("DMA %d (autodetected), ",dev->dma);
525 }
526 else
527 printk("DMA %d (assigned), ",dev->dma);
528
529 if(dev->irq < 2)
530 {
531 unsigned long irq_mask;
532
533 ni65_init_lance(p,dev->dev_addr,0,0);
534 irq_mask = probe_irq_on();
535 writereg(CSR0_INIT|CSR0_INEA,CSR0); /* trigger interrupt */
536 msleep(20);
537 dev->irq = probe_irq_off(irq_mask);
538 if(!dev->irq)
539 {
540 printk("Failed to detect IRQ line!\n");
541 ni65_free_buffer(p);
542 release_region(ioaddr, cards[p->cardno].total_size);
543 return -EAGAIN;
544 }
545 printk("IRQ %d (autodetected).\n",dev->irq);
546 }
547 else
548 printk("IRQ %d (assigned).\n",dev->irq);
549 }
550
551 if(request_dma(dev->dma, cards[p->cardno].cardname ) != 0)
552 {
553 printk(KERN_ERR "%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma);
554 ni65_free_buffer(p);
555 release_region(ioaddr, cards[p->cardno].total_size);
556 return -EAGAIN;
557 }
558
559 dev->base_addr = ioaddr;
560 dev->netdev_ops = &ni65_netdev_ops;
561 dev->watchdog_timeo = HZ/2;
562
563 return 0; /* everything is OK */
564 }
565
566 /*
567 * set lance register and trigger init
568 */
569 static void ni65_init_lance(struct priv *p,unsigned char *daddr,int filter,int mode)
570 {
571 int i;
572 u32 pib;
573
574 writereg(CSR0_CLRALL|CSR0_STOP,CSR0);
575
576 for(i=0;i<6;i++)
577 p->ib.eaddr[i] = daddr[i];
578
579 for(i=0;i<8;i++)
580 p->ib.filter[i] = filter;
581 p->ib.mode = mode;
582
583 p->ib.trp = (u32) isa_virt_to_bus(p->tmdhead) | TMDNUMMASK;
584 p->ib.rrp = (u32) isa_virt_to_bus(p->rmdhead) | RMDNUMMASK;
585 writereg(0,CSR3); /* busmaster/no word-swap */
586 pib = (u32) isa_virt_to_bus(&p->ib);
587 writereg(pib & 0xffff,CSR1);
588 writereg(pib >> 16,CSR2);
589
590 writereg(CSR0_INIT,CSR0); /* this changes L_ADDRREG to CSR0 */
591
592 for(i=0;i<32;i++)
593 {
594 mdelay(4);
595 if(inw(PORT+L_DATAREG) & (CSR0_IDON | CSR0_MERR) )
596 break; /* init ok ? */
597 }
598 }
599
600 /*
601 * allocate memory area and check the 16MB border
602 */
603 static void *ni65_alloc_mem(struct net_device *dev,char *what,int size,int type)
604 {
605 struct sk_buff *skb=NULL;
606 unsigned char *ptr;
607 void *ret;
608
609 if(type) {
610 ret = skb = alloc_skb(2+16+size,GFP_KERNEL|GFP_DMA);
611 if(!skb) {
612 printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
613 return NULL;
614 }
615 skb_reserve(skb,2+16);
616 skb_put(skb,R_BUF_SIZE); /* grab the whole space .. (not necessary) */
617 ptr = skb->data;
618 }
619 else {
620 ret = ptr = kmalloc(T_BUF_SIZE,GFP_KERNEL | GFP_DMA);
621 if(!ret)
622 return NULL;
623 }
624 if( (u32) virt_to_phys(ptr+size) > 0x1000000) {
625 printk(KERN_WARNING "%s: unable to allocate %s memory in lower 16MB!\n",dev->name,what);
626 if(type)
627 kfree_skb(skb);
628 else
629 kfree(ptr);
630 return NULL;
631 }
632 return ret;
633 }
634
635 /*
636 * allocate all memory structures .. send/recv buffers etc ...
637 */
638 static int ni65_alloc_buffer(struct net_device *dev)
639 {
640 unsigned char *ptr;
641 struct priv *p;
642 int i;
643
644 /*
645 * we need 8-aligned memory ..
646 */
647 ptr = ni65_alloc_mem(dev,"BUFFER",sizeof(struct priv)+8,0);
648 if(!ptr)
649 return -ENOMEM;
650
651 p = dev->ml_priv = (struct priv *) (((unsigned long) ptr + 7) & ~0x7);
652 memset((char *)p, 0, sizeof(struct priv));
653 p->self = ptr;
654
655 for(i=0;i<TMDNUM;i++)
656 {
657 #ifdef XMT_VIA_SKB
658 p->tmd_skb[i] = NULL;
659 #endif
660 p->tmdbounce[i] = ni65_alloc_mem(dev,"XMIT",T_BUF_SIZE,0);
661 if(!p->tmdbounce[i]) {
662 ni65_free_buffer(p);
663 return -ENOMEM;
664 }
665 }
666
667 for(i=0;i<RMDNUM;i++)
668 {
669 #ifdef RCV_VIA_SKB
670 p->recv_skb[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,1);
671 if(!p->recv_skb[i]) {
672 ni65_free_buffer(p);
673 return -ENOMEM;
674 }
675 #else
676 p->recvbounce[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,0);
677 if(!p->recvbounce[i]) {
678 ni65_free_buffer(p);
679 return -ENOMEM;
680 }
681 #endif
682 }
683
684 return 0; /* everything is OK */
685 }
686
687 /*
688 * free buffers and private struct
689 */
690 static void ni65_free_buffer(struct priv *p)
691 {
692 int i;
693
694 if(!p)
695 return;
696
697 for(i=0;i<TMDNUM;i++) {
698 kfree(p->tmdbounce[i]);
699 #ifdef XMT_VIA_SKB
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 dev_kfree_skb(p->recv_skb[i]);
708 #else
709 kfree(p->recvbounce[i]);
710 #endif
711 }
712 kfree(p->self);
713 }
714
715
716 /*
717 * stop and (re)start lance .. e.g after an error
718 */
719 static void ni65_stop_start(struct net_device *dev,struct priv *p)
720 {
721 int csr0 = CSR0_INEA;
722
723 writedatareg(CSR0_STOP);
724
725 if(debuglevel > 1)
726 printk(KERN_DEBUG "ni65_stop_start\n");
727
728 if(p->features & INIT_RING_BEFORE_START) {
729 int i;
730 #ifdef XMT_VIA_SKB
731 struct sk_buff *skb_save[TMDNUM];
732 #endif
733 unsigned long buffer[TMDNUM];
734 short blen[TMDNUM];
735
736 if(p->xmit_queued) {
737 while(1) {
738 if((p->tmdhead[p->tmdlast].u.s.status & XMIT_OWN))
739 break;
740 p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
741 if(p->tmdlast == p->tmdnum)
742 break;
743 }
744 }
745
746 for(i=0;i<TMDNUM;i++) {
747 struct tmd *tmdp = p->tmdhead + i;
748 #ifdef XMT_VIA_SKB
749 skb_save[i] = p->tmd_skb[i];
750 #endif
751 buffer[i] = (u32) isa_bus_to_virt(tmdp->u.buffer);
752 blen[i] = tmdp->blen;
753 tmdp->u.s.status = 0x0;
754 }
755
756 for(i=0;i<RMDNUM;i++) {
757 struct rmd *rmdp = p->rmdhead + i;
758 rmdp->u.s.status = RCV_OWN;
759 }
760 p->tmdnum = p->xmit_queued = 0;
761 writedatareg(CSR0_STRT | csr0);
762
763 for(i=0;i<TMDNUM;i++) {
764 int num = (i + p->tmdlast) & (TMDNUM-1);
765 p->tmdhead[i].u.buffer = (u32) isa_virt_to_bus((char *)buffer[num]); /* status is part of buffer field */
766 p->tmdhead[i].blen = blen[num];
767 if(p->tmdhead[i].u.s.status & XMIT_OWN) {
768 p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
769 p->xmit_queued = 1;
770 writedatareg(CSR0_TDMD | CSR0_INEA | csr0);
771 }
772 #ifdef XMT_VIA_SKB
773 p->tmd_skb[i] = skb_save[num];
774 #endif
775 }
776 p->rmdnum = p->tmdlast = 0;
777 if(!p->lock)
778 if (p->tmdnum || !p->xmit_queued)
779 netif_wake_queue(dev);
780 netif_trans_update(dev); /* prevent tx timeout */
781 }
782 else
783 writedatareg(CSR0_STRT | csr0);
784 }
785
786 /*
787 * init lance (write init-values .. init-buffers) (open-helper)
788 */
789 static int ni65_lance_reinit(struct net_device *dev)
790 {
791 int i;
792 struct priv *p = dev->ml_priv;
793 unsigned long flags;
794
795 p->lock = 0;
796 p->xmit_queued = 0;
797
798 flags=claim_dma_lock();
799 disable_dma(dev->dma); /* I've never worked with dma, but we do it like the packetdriver */
800 set_dma_mode(dev->dma,DMA_MODE_CASCADE);
801 enable_dma(dev->dma);
802 release_dma_lock(flags);
803
804 outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
805 if( (i=readreg(CSR0) ) != 0x4)
806 {
807 printk(KERN_ERR "%s: can't RESET %s card: %04x\n",dev->name,
808 cards[p->cardno].cardname,(int) i);
809 flags=claim_dma_lock();
810 disable_dma(dev->dma);
811 release_dma_lock(flags);
812 return 0;
813 }
814
815 p->rmdnum = p->tmdnum = p->tmdlast = p->tmdbouncenum = 0;
816 for(i=0;i<TMDNUM;i++)
817 {
818 struct tmd *tmdp = p->tmdhead + i;
819 #ifdef XMT_VIA_SKB
820 if(p->tmd_skb[i]) {
821 dev_kfree_skb(p->tmd_skb[i]);
822 p->tmd_skb[i] = NULL;
823 }
824 #endif
825 tmdp->u.buffer = 0x0;
826 tmdp->u.s.status = XMIT_START | XMIT_END;
827 tmdp->blen = tmdp->status2 = 0;
828 }
829
830 for(i=0;i<RMDNUM;i++)
831 {
832 struct rmd *rmdp = p->rmdhead + i;
833 #ifdef RCV_VIA_SKB
834 rmdp->u.buffer = (u32) isa_virt_to_bus(p->recv_skb[i]->data);
835 #else
836 rmdp->u.buffer = (u32) isa_virt_to_bus(p->recvbounce[i]);
837 #endif
838 rmdp->blen = -(R_BUF_SIZE-8);
839 rmdp->mlen = 0;
840 rmdp->u.s.status = RCV_OWN;
841 }
842
843 if(dev->flags & IFF_PROMISC)
844 ni65_init_lance(p,dev->dev_addr,0x00,M_PROM);
845 else if (netdev_mc_count(dev) || dev->flags & IFF_ALLMULTI)
846 ni65_init_lance(p,dev->dev_addr,0xff,0x0);
847 else
848 ni65_init_lance(p,dev->dev_addr,0x00,0x00);
849
850 /*
851 * ni65_set_lance_mem() sets L_ADDRREG to CSR0
852 * NOW, WE WILL NEVER CHANGE THE L_ADDRREG, CSR0 IS ALWAYS SELECTED
853 */
854
855 if(inw(PORT+L_DATAREG) & CSR0_IDON) {
856 ni65_set_performance(p);
857 /* init OK: start lance , enable interrupts */
858 writedatareg(CSR0_CLRALL | CSR0_INEA | CSR0_STRT);
859 return 1; /* ->OK */
860 }
861 printk(KERN_ERR "%s: can't init lance, status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG));
862 flags=claim_dma_lock();
863 disable_dma(dev->dma);
864 release_dma_lock(flags);
865 return 0; /* ->Error */
866 }
867
868 /*
869 * interrupt handler
870 */
871 static irqreturn_t ni65_interrupt(int irq, void * dev_id)
872 {
873 int csr0 = 0;
874 struct net_device *dev = dev_id;
875 struct priv *p;
876 int bcnt = 32;
877
878 p = dev->ml_priv;
879
880 spin_lock(&p->ring_lock);
881
882 while(--bcnt) {
883 csr0 = inw(PORT+L_DATAREG);
884
885 #if 0
886 writedatareg( (csr0 & CSR0_CLRALL) ); /* ack interrupts, disable int. */
887 #else
888 writedatareg( (csr0 & CSR0_CLRALL) | CSR0_INEA ); /* ack interrupts, interrupts enabled */
889 #endif
890
891 if(!(csr0 & (CSR0_ERR | CSR0_RINT | CSR0_TINT)))
892 break;
893
894 if(csr0 & CSR0_RINT) /* RECV-int? */
895 ni65_recv_intr(dev,csr0);
896 if(csr0 & CSR0_TINT) /* XMIT-int? */
897 ni65_xmit_intr(dev,csr0);
898
899 if(csr0 & CSR0_ERR)
900 {
901 if(debuglevel > 1)
902 printk(KERN_ERR "%s: general error: %04x.\n",dev->name,csr0);
903 if(csr0 & CSR0_BABL)
904 dev->stats.tx_errors++;
905 if(csr0 & CSR0_MISS) {
906 int i;
907 for(i=0;i<RMDNUM;i++)
908 printk("%02x ",p->rmdhead[i].u.s.status);
909 printk("\n");
910 dev->stats.rx_errors++;
911 }
912 if(csr0 & CSR0_MERR) {
913 if(debuglevel > 1)
914 printk(KERN_ERR "%s: Ooops .. memory error: %04x.\n",dev->name,csr0);
915 ni65_stop_start(dev,p);
916 }
917 }
918 }
919
920 #ifdef RCV_PARANOIA_CHECK
921 {
922 int j;
923 for(j=0;j<RMDNUM;j++)
924 {
925 int i, num2;
926 for(i=RMDNUM-1;i>0;i--) {
927 num2 = (p->rmdnum + i) & (RMDNUM-1);
928 if(!(p->rmdhead[num2].u.s.status & RCV_OWN))
929 break;
930 }
931
932 if(i) {
933 int k, num1;
934 for(k=0;k<RMDNUM;k++) {
935 num1 = (p->rmdnum + k) & (RMDNUM-1);
936 if(!(p->rmdhead[num1].u.s.status & RCV_OWN))
937 break;
938 }
939 if(!k)
940 break;
941
942 if(debuglevel > 0)
943 {
944 char buf[256],*buf1;
945 buf1 = buf;
946 for(k=0;k<RMDNUM;k++) {
947 sprintf(buf1,"%02x ",(p->rmdhead[k].u.s.status)); /* & RCV_OWN) ); */
948 buf1 += 3;
949 }
950 *buf1 = 0;
951 printk(KERN_ERR "%s: Ooops, receive ring corrupted %2d %2d | %s\n",dev->name,p->rmdnum,i,buf);
952 }
953
954 p->rmdnum = num1;
955 ni65_recv_intr(dev,csr0);
956 if((p->rmdhead[num2].u.s.status & RCV_OWN))
957 break; /* ok, we are 'in sync' again */
958 }
959 else
960 break;
961 }
962 }
963 #endif
964
965 if( (csr0 & (CSR0_RXON | CSR0_TXON)) != (CSR0_RXON | CSR0_TXON) ) {
966 printk(KERN_DEBUG "%s: RX or TX was offline -> restart\n",dev->name);
967 ni65_stop_start(dev,p);
968 }
969 else
970 writedatareg(CSR0_INEA);
971
972 spin_unlock(&p->ring_lock);
973 return IRQ_HANDLED;
974 }
975
976 /*
977 * We have received an Xmit-Interrupt ..
978 * send a new packet if necessary
979 */
980 static void ni65_xmit_intr(struct net_device *dev,int csr0)
981 {
982 struct priv *p = dev->ml_priv;
983
984 while(p->xmit_queued)
985 {
986 struct tmd *tmdp = p->tmdhead + p->tmdlast;
987 int tmdstat = tmdp->u.s.status;
988
989 if(tmdstat & XMIT_OWN)
990 break;
991
992 if(tmdstat & XMIT_ERR)
993 {
994 #if 0
995 if(tmdp->status2 & XMIT_TDRMASK && debuglevel > 3)
996 printk(KERN_ERR "%s: tdr-problems (e.g. no resistor)\n",dev->name);
997 #endif
998 /* checking some errors */
999 if(tmdp->status2 & XMIT_RTRY)
1000 dev->stats.tx_aborted_errors++;
1001 if(tmdp->status2 & XMIT_LCAR)
1002 dev->stats.tx_carrier_errors++;
1003 if(tmdp->status2 & (XMIT_BUFF | XMIT_UFLO )) {
1004 /* this stops the xmitter */
1005 dev->stats.tx_fifo_errors++;
1006 if(debuglevel > 0)
1007 printk(KERN_ERR "%s: Xmit FIFO/BUFF error\n",dev->name);
1008 if(p->features & INIT_RING_BEFORE_START) {
1009 tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END; /* test: resend this frame */
1010 ni65_stop_start(dev,p);
1011 break; /* no more Xmit processing .. */
1012 }
1013 else
1014 ni65_stop_start(dev,p);
1015 }
1016 if(debuglevel > 2)
1017 printk(KERN_ERR "%s: xmit-error: %04x %02x-%04x\n",dev->name,csr0,(int) tmdstat,(int) tmdp->status2);
1018 if(!(csr0 & CSR0_BABL)) /* don't count errors twice */
1019 dev->stats.tx_errors++;
1020 tmdp->status2 = 0;
1021 }
1022 else {
1023 dev->stats.tx_bytes -= (short)(tmdp->blen);
1024 dev->stats.tx_packets++;
1025 }
1026
1027 #ifdef XMT_VIA_SKB
1028 if(p->tmd_skb[p->tmdlast]) {
1029 dev_consume_skb_irq(p->tmd_skb[p->tmdlast]);
1030 p->tmd_skb[p->tmdlast] = NULL;
1031 }
1032 #endif
1033
1034 p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
1035 if(p->tmdlast == p->tmdnum)
1036 p->xmit_queued = 0;
1037 }
1038 netif_wake_queue(dev);
1039 }
1040
1041 /*
1042 * We have received a packet
1043 */
1044 static void ni65_recv_intr(struct net_device *dev,int csr0)
1045 {
1046 struct rmd *rmdp;
1047 int rmdstat,len;
1048 int cnt=0;
1049 struct priv *p = dev->ml_priv;
1050
1051 rmdp = p->rmdhead + p->rmdnum;
1052 while(!( (rmdstat = rmdp->u.s.status) & RCV_OWN))
1053 {
1054 cnt++;
1055 if( (rmdstat & (RCV_START | RCV_END | RCV_ERR)) != (RCV_START | RCV_END) ) /* error or oversized? */
1056 {
1057 if(!(rmdstat & RCV_ERR)) {
1058 if(rmdstat & RCV_START)
1059 {
1060 dev->stats.rx_length_errors++;
1061 printk(KERN_ERR "%s: recv, packet too long: %d\n",dev->name,rmdp->mlen & 0x0fff);
1062 }
1063 }
1064 else {
1065 if(debuglevel > 2)
1066 printk(KERN_ERR "%s: receive-error: %04x, lance-status: %04x/%04x\n",
1067 dev->name,(int) rmdstat,csr0,(int) inw(PORT+L_DATAREG) );
1068 if(rmdstat & RCV_FRAM)
1069 dev->stats.rx_frame_errors++;
1070 if(rmdstat & RCV_OFLO)
1071 dev->stats.rx_over_errors++;
1072 if(rmdstat & RCV_CRC)
1073 dev->stats.rx_crc_errors++;
1074 if(rmdstat & RCV_BUF_ERR)
1075 dev->stats.rx_fifo_errors++;
1076 }
1077 if(!(csr0 & CSR0_MISS)) /* don't count errors twice */
1078 dev->stats.rx_errors++;
1079 }
1080 else if( (len = (rmdp->mlen & 0x0fff) - 4) >= 60)
1081 {
1082 #ifdef RCV_VIA_SKB
1083 struct sk_buff *skb = alloc_skb(R_BUF_SIZE+2+16,GFP_ATOMIC);
1084 if (skb)
1085 skb_reserve(skb,16);
1086 #else
1087 struct sk_buff *skb = netdev_alloc_skb(dev, len + 2);
1088 #endif
1089 if(skb)
1090 {
1091 skb_reserve(skb,2);
1092 #ifdef RCV_VIA_SKB
1093 if( (unsigned long) (skb->data + R_BUF_SIZE) > 0x1000000) {
1094 skb_put(skb,len);
1095 skb_copy_to_linear_data(skb, (unsigned char *)(p->recv_skb[p->rmdnum]->data),len);
1096 }
1097 else {
1098 struct sk_buff *skb1 = p->recv_skb[p->rmdnum];
1099 skb_put(skb,R_BUF_SIZE);
1100 p->recv_skb[p->rmdnum] = skb;
1101 rmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
1102 skb = skb1;
1103 skb_trim(skb,len);
1104 }
1105 #else
1106 skb_put(skb,len);
1107 skb_copy_to_linear_data(skb, (unsigned char *) p->recvbounce[p->rmdnum],len);
1108 #endif
1109 dev->stats.rx_packets++;
1110 dev->stats.rx_bytes += len;
1111 skb->protocol=eth_type_trans(skb,dev);
1112 netif_rx(skb);
1113 }
1114 else
1115 {
1116 printk(KERN_ERR "%s: can't alloc new sk_buff\n",dev->name);
1117 dev->stats.rx_dropped++;
1118 }
1119 }
1120 else {
1121 printk(KERN_INFO "%s: received runt packet\n",dev->name);
1122 dev->stats.rx_errors++;
1123 }
1124 rmdp->blen = -(R_BUF_SIZE-8);
1125 rmdp->mlen = 0;
1126 rmdp->u.s.status = RCV_OWN; /* change owner */
1127 p->rmdnum = (p->rmdnum + 1) & (RMDNUM-1);
1128 rmdp = p->rmdhead + p->rmdnum;
1129 }
1130 }
1131
1132 /*
1133 * kick xmitter ..
1134 */
1135
1136 static void ni65_timeout(struct net_device *dev, unsigned int txqueue)
1137 {
1138 int i;
1139 struct priv *p = dev->ml_priv;
1140
1141 printk(KERN_ERR "%s: xmitter timed out, try to restart!\n",dev->name);
1142 for(i=0;i<TMDNUM;i++)
1143 printk("%02x ",p->tmdhead[i].u.s.status);
1144 printk("\n");
1145 ni65_lance_reinit(dev);
1146 netif_trans_update(dev); /* prevent tx timeout */
1147 netif_wake_queue(dev);
1148 }
1149
1150 /*
1151 * Send a packet
1152 */
1153
1154 static netdev_tx_t ni65_send_packet(struct sk_buff *skb,
1155 struct net_device *dev)
1156 {
1157 struct priv *p = dev->ml_priv;
1158
1159 netif_stop_queue(dev);
1160
1161 if (test_and_set_bit(0, (void*)&p->lock)) {
1162 printk(KERN_ERR "%s: Queue was locked.\n", dev->name);
1163 return NETDEV_TX_BUSY;
1164 }
1165
1166 {
1167 short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
1168 struct tmd *tmdp;
1169 unsigned long flags;
1170
1171 #ifdef XMT_VIA_SKB
1172 if( (unsigned long) (skb->data + skb->len) > 0x1000000) {
1173 #endif
1174
1175 skb_copy_from_linear_data(skb, p->tmdbounce[p->tmdbouncenum],
1176 skb->len > T_BUF_SIZE ? T_BUF_SIZE :
1177 skb->len);
1178 if (len > skb->len)
1179 memset((char *)p->tmdbounce[p->tmdbouncenum]+skb->len, 0, len-skb->len);
1180 dev_kfree_skb (skb);
1181
1182 spin_lock_irqsave(&p->ring_lock, flags);
1183 tmdp = p->tmdhead + p->tmdnum;
1184 tmdp->u.buffer = (u32) isa_virt_to_bus(p->tmdbounce[p->tmdbouncenum]);
1185 p->tmdbouncenum = (p->tmdbouncenum + 1) & (TMDNUM - 1);
1186
1187 #ifdef XMT_VIA_SKB
1188 }
1189 else {
1190 spin_lock_irqsave(&p->ring_lock, flags);
1191
1192 tmdp = p->tmdhead + p->tmdnum;
1193 tmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
1194 p->tmd_skb[p->tmdnum] = skb;
1195 }
1196 #endif
1197 tmdp->blen = -len;
1198
1199 tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;
1200 writedatareg(CSR0_TDMD | CSR0_INEA); /* enable xmit & interrupt */
1201
1202 p->xmit_queued = 1;
1203 p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
1204
1205 if(p->tmdnum != p->tmdlast)
1206 netif_wake_queue(dev);
1207
1208 p->lock = 0;
1209
1210 spin_unlock_irqrestore(&p->ring_lock, flags);
1211 }
1212
1213 return NETDEV_TX_OK;
1214 }
1215
1216 static void set_multicast_list(struct net_device *dev)
1217 {
1218 if(!ni65_lance_reinit(dev))
1219 printk(KERN_ERR "%s: Can't switch card into MC mode!\n",dev->name);
1220 netif_wake_queue(dev);
1221 }
1222
1223 #ifdef MODULE
1224 static struct net_device *dev_ni65;
1225
1226 module_param_hw(irq, int, irq, 0);
1227 module_param_hw(io, int, ioport, 0);
1228 module_param_hw(dma, int, dma, 0);
1229 MODULE_PARM_DESC(irq, "ni6510 IRQ number (ignored for some cards)");
1230 MODULE_PARM_DESC(io, "ni6510 I/O base address");
1231 MODULE_PARM_DESC(dma, "ni6510 ISA DMA channel (ignored for some cards)");
1232
1233 int __init init_module(void)
1234 {
1235 dev_ni65 = ni65_probe(-1);
1236 return PTR_ERR_OR_ZERO(dev_ni65);
1237 }
1238
1239 void __exit cleanup_module(void)
1240 {
1241 unregister_netdev(dev_ni65);
1242 cleanup_card(dev_ni65);
1243 free_netdev(dev_ni65);
1244 }
1245 #endif /* MODULE */
1246
1247 MODULE_LICENSE("GPL");
Linux with added FPC-III support