Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6.git] / drivers / net / ni65.c
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 int  ni65_send_packet(struct sk_buff *skb, struct net_device *dev);
256 static void  ni65_timeout(struct net_device *dev);
257 static int  ni65_close(struct net_device *dev);
258 static int  ni65_alloc_buffer(struct net_device *dev);
259 static void ni65_free_buffer(struct priv *p);
260 static void set_multicast_list(struct net_device *dev);
261
262 static int irqtab[] __initdata = { 9,12,15,5 }; /* irq config-translate */
263 static int dmatab[] __initdata = { 0,3,5,6,7 }; /* dma config-translate and autodetect */
264
265 static int debuglevel = 1;
266
267 /*
268  * set 'performance' registers .. we must STOP lance for that
269  */
270 static void ni65_set_performance(struct priv *p)
271 {
272         writereg(CSR0_STOP | CSR0_CLRALL,CSR0); /* STOP */
273
274         if( !(cards[p->cardno].config & 0x02) )
275                 return;
276
277         outw(80,PORT+L_ADDRREG);
278         if(inw(PORT+L_ADDRREG) != 80)
279                 return;
280
281         writereg( (csr80 & 0x3fff) ,80); /* FIFO watermarks */
282         outw(0,PORT+L_ADDRREG);
283         outw((short)isa0,PORT+L_BUSIF); /* write ISA 0: DMA_R : isa0 * 50ns */
284         outw(1,PORT+L_ADDRREG);
285         outw((short)isa1,PORT+L_BUSIF); /* write ISA 1: DMA_W : isa1 * 50ns     */
286
287         outw(CSR0,PORT+L_ADDRREG);      /* switch back to CSR0 */
288 }
289
290 /*
291  * open interface (up)
292  */
293 static int ni65_open(struct net_device *dev)
294 {
295         struct priv *p = dev->ml_priv;
296         int irqval = request_irq(dev->irq, &ni65_interrupt,0,
297                         cards[p->cardno].cardname,dev);
298         if (irqval) {
299                 printk(KERN_ERR "%s: unable to get IRQ %d (irqval=%d).\n",
300                           dev->name,dev->irq, irqval);
301                 return -EAGAIN;
302         }
303
304         if(ni65_lance_reinit(dev))
305         {
306                 netif_start_queue(dev);
307                 return 0;
308         }
309         else
310         {
311                 free_irq(dev->irq,dev);
312                 return -EAGAIN;
313         }
314 }
315
316 /*
317  * close interface (down)
318  */
319 static int ni65_close(struct net_device *dev)
320 {
321         struct priv *p = dev->ml_priv;
322
323         netif_stop_queue(dev);
324
325         outw(inw(PORT+L_RESET),PORT+L_RESET); /* that's the hard way */
326
327 #ifdef XMT_VIA_SKB
328         {
329                 int i;
330                 for(i=0;i<TMDNUM;i++)
331                 {
332                         if(p->tmd_skb[i]) {
333                                 dev_kfree_skb(p->tmd_skb[i]);
334                                 p->tmd_skb[i] = NULL;
335                         }
336                 }
337         }
338 #endif
339         free_irq(dev->irq,dev);
340         return 0;
341 }
342
343 static void cleanup_card(struct net_device *dev)
344 {
345         struct priv *p = dev->ml_priv;
346         disable_dma(dev->dma);
347         free_dma(dev->dma);
348         release_region(dev->base_addr, cards[p->cardno].total_size);
349         ni65_free_buffer(p);
350 }
351
352 /* set: io,irq,dma or set it when calling insmod */
353 static int irq;
354 static int io;
355 static int dma;
356
357 /*
358  * Probe The Card (not the lance-chip)
359  */
360 struct net_device * __init ni65_probe(int unit)
361 {
362         struct net_device *dev = alloc_etherdev(0);
363         static int ports[] = {0x360,0x300,0x320,0x340, 0};
364         int *port;
365         int err = 0;
366
367         if (!dev)
368                 return ERR_PTR(-ENOMEM);
369
370         if (unit >= 0) {
371                 sprintf(dev->name, "eth%d", unit);
372                 netdev_boot_setup_check(dev);
373                 irq = dev->irq;
374                 dma = dev->dma;
375         } else {
376                 dev->base_addr = io;
377         }
378
379         if (dev->base_addr > 0x1ff) { /* Check a single specified location. */
380                 err = ni65_probe1(dev, dev->base_addr);
381         } else if (dev->base_addr > 0) { /* Don't probe at all. */
382                 err = -ENXIO;
383         } else {
384                 for (port = ports; *port && ni65_probe1(dev, *port); port++)
385                         ;
386                 if (!*port)
387                         err = -ENODEV;
388         }
389         if (err)
390                 goto out;
391
392         err = register_netdev(dev);
393         if (err)
394                 goto out1;
395         return dev;
396 out1:
397         cleanup_card(dev);
398 out:
399         free_netdev(dev);
400         return ERR_PTR(err);
401 }
402
403 static const struct net_device_ops ni65_netdev_ops = {
404         .ndo_open               = ni65_open,
405         .ndo_stop               = ni65_close,
406         .ndo_start_xmit         = ni65_send_packet,
407         .ndo_tx_timeout         = ni65_timeout,
408         .ndo_set_multicast_list = set_multicast_list,
409         .ndo_change_mtu         = eth_change_mtu,
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                                         continue;
441                           }
442                 }
443                 break;
444         }
445         if(i == NUM_CARDS)
446                 return -ENODEV;
447
448         for(j=0;j<6;j++)
449                 dev->dev_addr[j] = inb(ioaddr+cards[i].addr_offset+j);
450
451         if( (j=ni65_alloc_buffer(dev)) < 0) {
452                 release_region(ioaddr, cards[i].total_size);
453                 return j;
454         }
455         p = dev->ml_priv;
456         p->cmdr_addr = ioaddr + cards[i].cmd_offset;
457         p->cardno = i;
458         spin_lock_init(&p->ring_lock);
459
460         printk(KERN_INFO "%s: %s found at %#3x, ", dev->name, cards[p->cardno].cardname , ioaddr);
461
462         outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
463         if( (j=readreg(CSR0)) != 0x4) {
464                  printk("failed.\n");
465                  printk(KERN_ERR "%s: Can't RESET card: %04x\n", dev->name, j);
466                  ni65_free_buffer(p);
467                  release_region(ioaddr, cards[p->cardno].total_size);
468                  return -EAGAIN;
469         }
470
471         outw(88,PORT+L_ADDRREG);
472         if(inw(PORT+L_ADDRREG) == 88) {
473                 unsigned long v;
474                 v = inw(PORT+L_DATAREG);
475                 v <<= 16;
476                 outw(89,PORT+L_ADDRREG);
477                 v |= inw(PORT+L_DATAREG);
478                 printk("Version %#08lx, ",v);
479                 p->features = INIT_RING_BEFORE_START;
480         }
481         else {
482                 printk("ancient LANCE, ");
483                 p->features = 0x0;
484         }
485
486         if(test_bit(0,&cards[i].config)) {
487                 dev->irq = irqtab[(inw(ioaddr+L_CONFIG)>>2)&3];
488                 dev->dma = dmatab[inw(ioaddr+L_CONFIG)&3];
489                 printk("IRQ %d (from card), DMA %d (from card).\n",dev->irq,dev->dma);
490         }
491         else {
492                 if(dev->dma == 0) {
493                 /* 'stuck test' from lance.c */
494                         unsigned long dma_channels =
495                                 ((inb(DMA1_STAT_REG) >> 4) & 0x0f)
496                                 | (inb(DMA2_STAT_REG) & 0xf0);
497                         for(i=1;i<5;i++) {
498                                 int dma = dmatab[i];
499                                 if(test_bit(dma,&dma_channels) || request_dma(dma,"ni6510"))
500                                         continue;
501
502                                 flags=claim_dma_lock();
503                                 disable_dma(dma);
504                                 set_dma_mode(dma,DMA_MODE_CASCADE);
505                                 enable_dma(dma);
506                                 release_dma_lock(flags);
507
508                                 ni65_init_lance(p,dev->dev_addr,0,0); /* trigger memory access */
509
510                                 flags=claim_dma_lock();
511                                 disable_dma(dma);
512                                 free_dma(dma);
513                                 release_dma_lock(flags);
514
515                                 if(readreg(CSR0) & CSR0_IDON)
516                                         break;
517                         }
518                         if(i == 5) {
519                                 printk("failed.\n");
520                                 printk(KERN_ERR "%s: Can't detect DMA channel!\n", dev->name);
521                                 ni65_free_buffer(p);
522                                 release_region(ioaddr, cards[p->cardno].total_size);
523                                 return -EAGAIN;
524                         }
525                         dev->dma = dmatab[i];
526                         printk("DMA %d (autodetected), ",dev->dma);
527                 }
528                 else
529                         printk("DMA %d (assigned), ",dev->dma);
530
531                 if(dev->irq < 2)
532                 {
533                         unsigned long irq_mask;
534
535                         ni65_init_lance(p,dev->dev_addr,0,0);
536                         irq_mask = probe_irq_on();
537                         writereg(CSR0_INIT|CSR0_INEA,CSR0); /* trigger interrupt */
538                         msleep(20);
539                         dev->irq = probe_irq_off(irq_mask);
540                         if(!dev->irq)
541                         {
542                                 printk("Failed to detect IRQ line!\n");
543                                 ni65_free_buffer(p);
544                                 release_region(ioaddr, cards[p->cardno].total_size);
545                                 return -EAGAIN;
546                         }
547                         printk("IRQ %d (autodetected).\n",dev->irq);
548                 }
549                 else
550                         printk("IRQ %d (assigned).\n",dev->irq);
551         }
552
553         if(request_dma(dev->dma, cards[p->cardno].cardname ) != 0)
554         {
555                 printk(KERN_ERR "%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma);
556                 ni65_free_buffer(p);
557                 release_region(ioaddr, cards[p->cardno].total_size);
558                 return -EAGAIN;
559         }
560
561         dev->base_addr = ioaddr;
562         dev->netdev_ops = &ni65_netdev_ops;
563         dev->watchdog_timeo     = HZ/2;
564
565         return 0; /* everything is OK */
566 }
567
568 /*
569  * set lance register and trigger init
570  */
571 static void ni65_init_lance(struct priv *p,unsigned char *daddr,int filter,int mode)
572 {
573         int i;
574         u32 pib;
575
576         writereg(CSR0_CLRALL|CSR0_STOP,CSR0);
577
578         for(i=0;i<6;i++)
579                 p->ib.eaddr[i] = daddr[i];
580
581         for(i=0;i<8;i++)
582                 p->ib.filter[i] = filter;
583         p->ib.mode = mode;
584
585         p->ib.trp = (u32) isa_virt_to_bus(p->tmdhead) | TMDNUMMASK;
586         p->ib.rrp = (u32) isa_virt_to_bus(p->rmdhead) | RMDNUMMASK;
587         writereg(0,CSR3);       /* busmaster/no word-swap */
588         pib = (u32) isa_virt_to_bus(&p->ib);
589         writereg(pib & 0xffff,CSR1);
590         writereg(pib >> 16,CSR2);
591
592         writereg(CSR0_INIT,CSR0); /* this changes L_ADDRREG to CSR0 */
593
594         for(i=0;i<32;i++)
595         {
596                 mdelay(4);
597                 if(inw(PORT+L_DATAREG) & (CSR0_IDON | CSR0_MERR) )
598                         break; /* init ok ? */
599         }
600 }
601
602 /*
603  * allocate memory area and check the 16MB border
604  */
605 static void *ni65_alloc_mem(struct net_device *dev,char *what,int size,int type)
606 {
607         struct sk_buff *skb=NULL;
608         unsigned char *ptr;
609         void *ret;
610
611         if(type) {
612                 ret = skb = alloc_skb(2+16+size,GFP_KERNEL|GFP_DMA);
613                 if(!skb) {
614                         printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
615                         return NULL;
616                 }
617                 skb_reserve(skb,2+16);
618                 skb_put(skb,R_BUF_SIZE);         /* grab the whole space .. (not necessary) */
619                 ptr = skb->data;
620         }
621         else {
622                 ret = ptr = kmalloc(T_BUF_SIZE,GFP_KERNEL | GFP_DMA);
623                 if(!ret) {
624                         printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
625                         return NULL;
626                 }
627         }
628         if( (u32) virt_to_phys(ptr+size) > 0x1000000) {
629                 printk(KERN_WARNING "%s: unable to allocate %s memory in lower 16MB!\n",dev->name,what);
630                 if(type)
631                         kfree_skb(skb);
632                 else
633                         kfree(ptr);
634                 return NULL;
635         }
636         return ret;
637 }
638
639 /*
640  * allocate all memory structures .. send/recv buffers etc ...
641  */
642 static int ni65_alloc_buffer(struct net_device *dev)
643 {
644         unsigned char *ptr;
645         struct priv *p;
646         int i;
647
648         /*
649          * we need 8-aligned memory ..
650          */
651         ptr = ni65_alloc_mem(dev,"BUFFER",sizeof(struct priv)+8,0);
652         if(!ptr)
653                 return -ENOMEM;
654
655         p = dev->ml_priv = (struct priv *) (((unsigned long) ptr + 7) & ~0x7);
656         memset((char *)p, 0, sizeof(struct priv));
657         p->self = ptr;
658
659         for(i=0;i<TMDNUM;i++)
660         {
661 #ifdef XMT_VIA_SKB
662                 p->tmd_skb[i] = NULL;
663 #endif
664                 p->tmdbounce[i] = ni65_alloc_mem(dev,"XMIT",T_BUF_SIZE,0);
665                 if(!p->tmdbounce[i]) {
666                         ni65_free_buffer(p);
667                         return -ENOMEM;
668                 }
669         }
670
671         for(i=0;i<RMDNUM;i++)
672         {
673 #ifdef RCV_VIA_SKB
674                 p->recv_skb[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,1);
675                 if(!p->recv_skb[i]) {
676                         ni65_free_buffer(p);
677                         return -ENOMEM;
678                 }
679 #else
680                 p->recvbounce[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,0);
681                 if(!p->recvbounce[i]) {
682                         ni65_free_buffer(p);
683                         return -ENOMEM;
684                 }
685 #endif
686         }
687
688         return 0; /* everything is OK */
689 }
690
691 /*
692  * free buffers and private struct
693  */
694 static void ni65_free_buffer(struct priv *p)
695 {
696         int i;
697
698         if(!p)
699                 return;
700
701         for(i=0;i<TMDNUM;i++) {
702                 kfree(p->tmdbounce[i]);
703 #ifdef XMT_VIA_SKB
704                 if(p->tmd_skb[i])
705                         dev_kfree_skb(p->tmd_skb[i]);
706 #endif
707         }
708
709         for(i=0;i<RMDNUM;i++)
710         {
711 #ifdef RCV_VIA_SKB
712                 if(p->recv_skb[i])
713                         dev_kfree_skb(p->recv_skb[i]);
714 #else
715                 kfree(p->recvbounce[i]);
716 #endif
717         }
718         kfree(p->self);
719 }
720
721
722 /*
723  * stop and (re)start lance .. e.g after an error
724  */
725 static void ni65_stop_start(struct net_device *dev,struct priv *p)
726 {
727         int csr0 = CSR0_INEA;
728
729         writedatareg(CSR0_STOP);
730
731         if(debuglevel > 1)
732                 printk(KERN_DEBUG "ni65_stop_start\n");
733
734         if(p->features & INIT_RING_BEFORE_START) {
735                 int i;
736 #ifdef XMT_VIA_SKB
737                 struct sk_buff *skb_save[TMDNUM];
738 #endif
739                 unsigned long buffer[TMDNUM];
740                 short blen[TMDNUM];
741
742                 if(p->xmit_queued) {
743                         while(1) {
744                                 if((p->tmdhead[p->tmdlast].u.s.status & XMIT_OWN))
745                                         break;
746                                 p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
747                                 if(p->tmdlast == p->tmdnum)
748                                         break;
749                         }
750                 }
751
752                 for(i=0;i<TMDNUM;i++) {
753                         struct tmd *tmdp = p->tmdhead + i;
754 #ifdef XMT_VIA_SKB
755                         skb_save[i] = p->tmd_skb[i];
756 #endif
757                         buffer[i] = (u32) isa_bus_to_virt(tmdp->u.buffer);
758                         blen[i] = tmdp->blen;
759                         tmdp->u.s.status = 0x0;
760                 }
761
762                 for(i=0;i<RMDNUM;i++) {
763                         struct rmd *rmdp = p->rmdhead + i;
764                         rmdp->u.s.status = RCV_OWN;
765                 }
766                 p->tmdnum = p->xmit_queued = 0;
767                 writedatareg(CSR0_STRT | csr0);
768
769                 for(i=0;i<TMDNUM;i++) {
770                         int num = (i + p->tmdlast) & (TMDNUM-1);
771                         p->tmdhead[i].u.buffer = (u32) isa_virt_to_bus((char *)buffer[num]); /* status is part of buffer field */
772                         p->tmdhead[i].blen = blen[num];
773                         if(p->tmdhead[i].u.s.status & XMIT_OWN) {
774                                  p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
775                                  p->xmit_queued = 1;
776          writedatareg(CSR0_TDMD | CSR0_INEA | csr0);
777                         }
778 #ifdef XMT_VIA_SKB
779                         p->tmd_skb[i] = skb_save[num];
780 #endif
781                 }
782                 p->rmdnum = p->tmdlast = 0;
783                 if(!p->lock)
784                         if (p->tmdnum || !p->xmit_queued)
785                                 netif_wake_queue(dev);
786                 dev->trans_start = jiffies;
787         }
788         else
789                 writedatareg(CSR0_STRT | csr0);
790 }
791
792 /*
793  * init lance (write init-values .. init-buffers) (open-helper)
794  */
795 static int ni65_lance_reinit(struct net_device *dev)
796 {
797          int i;
798          struct priv *p = dev->ml_priv;
799          unsigned long flags;
800
801          p->lock = 0;
802          p->xmit_queued = 0;
803
804          flags=claim_dma_lock();
805          disable_dma(dev->dma); /* I've never worked with dma, but we do it like the packetdriver */
806          set_dma_mode(dev->dma,DMA_MODE_CASCADE);
807          enable_dma(dev->dma);
808          release_dma_lock(flags);
809
810          outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
811          if( (i=readreg(CSR0) ) != 0x4)
812          {
813                  printk(KERN_ERR "%s: can't RESET %s card: %04x\n",dev->name,
814                                                         cards[p->cardno].cardname,(int) i);
815                  flags=claim_dma_lock();
816                  disable_dma(dev->dma);
817                  release_dma_lock(flags);
818                  return 0;
819          }
820
821          p->rmdnum = p->tmdnum = p->tmdlast = p->tmdbouncenum = 0;
822          for(i=0;i<TMDNUM;i++)
823          {
824                  struct tmd *tmdp = p->tmdhead + i;
825 #ifdef XMT_VIA_SKB
826                  if(p->tmd_skb[i]) {
827                          dev_kfree_skb(p->tmd_skb[i]);
828                          p->tmd_skb[i] = NULL;
829                  }
830 #endif
831                  tmdp->u.buffer = 0x0;
832                  tmdp->u.s.status = XMIT_START | XMIT_END;
833                  tmdp->blen = tmdp->status2 = 0;
834          }
835
836          for(i=0;i<RMDNUM;i++)
837          {
838                  struct rmd *rmdp = p->rmdhead + i;
839 #ifdef RCV_VIA_SKB
840                  rmdp->u.buffer = (u32) isa_virt_to_bus(p->recv_skb[i]->data);
841 #else
842                  rmdp->u.buffer = (u32) isa_virt_to_bus(p->recvbounce[i]);
843 #endif
844                  rmdp->blen = -(R_BUF_SIZE-8);
845                  rmdp->mlen = 0;
846                  rmdp->u.s.status = RCV_OWN;
847          }
848
849          if(dev->flags & IFF_PROMISC)
850                  ni65_init_lance(p,dev->dev_addr,0x00,M_PROM);
851          else if(dev->mc_count || dev->flags & IFF_ALLMULTI)
852                  ni65_init_lance(p,dev->dev_addr,0xff,0x0);
853          else
854                  ni65_init_lance(p,dev->dev_addr,0x00,0x00);
855
856         /*
857          * ni65_set_lance_mem() sets L_ADDRREG to CSR0
858          * NOW, WE WILL NEVER CHANGE THE L_ADDRREG, CSR0 IS ALWAYS SELECTED
859          */
860
861          if(inw(PORT+L_DATAREG) & CSR0_IDON)    {
862                  ni65_set_performance(p);
863                                          /* init OK: start lance , enable interrupts */
864                  writedatareg(CSR0_CLRALL | CSR0_INEA | CSR0_STRT);
865                  return 1; /* ->OK */
866          }
867          printk(KERN_ERR "%s: can't init lance, status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG));
868          flags=claim_dma_lock();
869          disable_dma(dev->dma);
870          release_dma_lock(flags);
871          return 0; /* ->Error */
872 }
873
874 /*
875  * interrupt handler
876  */
877 static irqreturn_t ni65_interrupt(int irq, void * dev_id)
878 {
879         int csr0 = 0;
880         struct net_device *dev = dev_id;
881         struct priv *p;
882         int bcnt = 32;
883
884         p = dev->ml_priv;
885
886         spin_lock(&p->ring_lock);
887
888         while(--bcnt) {
889                 csr0 = inw(PORT+L_DATAREG);
890
891 #if 0
892                 writedatareg( (csr0 & CSR0_CLRALL) ); /* ack interrupts, disable int. */
893 #else
894                 writedatareg( (csr0 & CSR0_CLRALL) | CSR0_INEA ); /* ack interrupts, interrupts enabled */
895 #endif
896
897                 if(!(csr0 & (CSR0_ERR | CSR0_RINT | CSR0_TINT)))
898                         break;
899
900                 if(csr0 & CSR0_RINT) /* RECV-int? */
901                         ni65_recv_intr(dev,csr0);
902                 if(csr0 & CSR0_TINT) /* XMIT-int? */
903                         ni65_xmit_intr(dev,csr0);
904
905                 if(csr0 & CSR0_ERR)
906                 {
907                         if(debuglevel > 1)
908                                 printk(KERN_ERR "%s: general error: %04x.\n",dev->name,csr0);
909                         if(csr0 & CSR0_BABL)
910                                 dev->stats.tx_errors++;
911                         if(csr0 & CSR0_MISS) {
912                                 int i;
913                                 for(i=0;i<RMDNUM;i++)
914                                         printk("%02x ",p->rmdhead[i].u.s.status);
915                                 printk("\n");
916                                 dev->stats.rx_errors++;
917                         }
918                         if(csr0 & CSR0_MERR) {
919                                 if(debuglevel > 1)
920                                         printk(KERN_ERR "%s: Ooops .. memory error: %04x.\n",dev->name,csr0);
921                                 ni65_stop_start(dev,p);
922                         }
923                 }
924         }
925
926 #ifdef RCV_PARANOIA_CHECK
927 {
928  int j;
929  for(j=0;j<RMDNUM;j++)
930  {
931         int i, num2;
932         for(i=RMDNUM-1;i>0;i--) {
933                  num2 = (p->rmdnum + i) & (RMDNUM-1);
934                  if(!(p->rmdhead[num2].u.s.status & RCV_OWN))
935                                 break;
936         }
937
938         if(i) {
939                 int k, num1;
940                 for(k=0;k<RMDNUM;k++) {
941                         num1 = (p->rmdnum + k) & (RMDNUM-1);
942                         if(!(p->rmdhead[num1].u.s.status & RCV_OWN))
943                                 break;
944                 }
945                 if(!k)
946                         break;
947
948                 if(debuglevel > 0)
949                 {
950                         char buf[256],*buf1;
951                         buf1 = buf;
952                         for(k=0;k<RMDNUM;k++) {
953                                 sprintf(buf1,"%02x ",(p->rmdhead[k].u.s.status)); /* & RCV_OWN) ); */
954                                 buf1 += 3;
955                         }
956                         *buf1 = 0;
957                         printk(KERN_ERR "%s: Ooops, receive ring corrupted %2d %2d | %s\n",dev->name,p->rmdnum,i,buf);
958                 }
959
960                 p->rmdnum = num1;
961                 ni65_recv_intr(dev,csr0);
962                 if((p->rmdhead[num2].u.s.status & RCV_OWN))
963                         break;  /* ok, we are 'in sync' again */
964         }
965         else
966                 break;
967  }
968 }
969 #endif
970
971         if( (csr0 & (CSR0_RXON | CSR0_TXON)) != (CSR0_RXON | CSR0_TXON) ) {
972                 printk(KERN_DEBUG "%s: RX or TX was offline -> restart\n",dev->name);
973                 ni65_stop_start(dev,p);
974         }
975         else
976                 writedatareg(CSR0_INEA);
977
978         spin_unlock(&p->ring_lock);
979         return IRQ_HANDLED;
980 }
981
982 /*
983  * We have received an Xmit-Interrupt ..
984  * send a new packet if necessary
985  */
986 static void ni65_xmit_intr(struct net_device *dev,int csr0)
987 {
988         struct priv *p = dev->ml_priv;
989
990         while(p->xmit_queued)
991         {
992                 struct tmd *tmdp = p->tmdhead + p->tmdlast;
993                 int tmdstat = tmdp->u.s.status;
994
995                 if(tmdstat & XMIT_OWN)
996                         break;
997
998                 if(tmdstat & XMIT_ERR)
999                 {
1000 #if 0
1001                         if(tmdp->status2 & XMIT_TDRMASK && debuglevel > 3)
1002                                 printk(KERN_ERR "%s: tdr-problems (e.g. no resistor)\n",dev->name);
1003 #endif
1004                  /* checking some errors */
1005                         if(tmdp->status2 & XMIT_RTRY)
1006                                 dev->stats.tx_aborted_errors++;
1007                         if(tmdp->status2 & XMIT_LCAR)
1008                                 dev->stats.tx_carrier_errors++;
1009                         if(tmdp->status2 & (XMIT_BUFF | XMIT_UFLO )) {
1010                 /* this stops the xmitter */
1011                                 dev->stats.tx_fifo_errors++;
1012                                 if(debuglevel > 0)
1013                                         printk(KERN_ERR "%s: Xmit FIFO/BUFF error\n",dev->name);
1014                                 if(p->features & INIT_RING_BEFORE_START) {
1015                                         tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;    /* test: resend this frame */
1016                                         ni65_stop_start(dev,p);
1017                                         break;  /* no more Xmit processing .. */
1018                                 }
1019                                 else
1020                                  ni65_stop_start(dev,p);
1021                         }
1022                         if(debuglevel > 2)
1023                                 printk(KERN_ERR "%s: xmit-error: %04x %02x-%04x\n",dev->name,csr0,(int) tmdstat,(int) tmdp->status2);
1024                         if(!(csr0 & CSR0_BABL)) /* don't count errors twice */
1025                                 dev->stats.tx_errors++;
1026                         tmdp->status2 = 0;
1027                 }
1028                 else {
1029                         dev->stats.tx_bytes -= (short)(tmdp->blen);
1030                         dev->stats.tx_packets++;
1031                 }
1032
1033 #ifdef XMT_VIA_SKB
1034                 if(p->tmd_skb[p->tmdlast]) {
1035                          dev_kfree_skb_irq(p->tmd_skb[p->tmdlast]);
1036                          p->tmd_skb[p->tmdlast] = NULL;
1037                 }
1038 #endif
1039
1040                 p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
1041                 if(p->tmdlast == p->tmdnum)
1042                         p->xmit_queued = 0;
1043         }
1044         netif_wake_queue(dev);
1045 }
1046
1047 /*
1048  * We have received a packet
1049  */
1050 static void ni65_recv_intr(struct net_device *dev,int csr0)
1051 {
1052         struct rmd *rmdp;
1053         int rmdstat,len;
1054         int cnt=0;
1055         struct priv *p = dev->ml_priv;
1056
1057         rmdp = p->rmdhead + p->rmdnum;
1058         while(!( (rmdstat = rmdp->u.s.status) & RCV_OWN))
1059         {
1060                 cnt++;
1061                 if( (rmdstat & (RCV_START | RCV_END | RCV_ERR)) != (RCV_START | RCV_END) ) /* error or oversized? */
1062                 {
1063                         if(!(rmdstat & RCV_ERR)) {
1064                                 if(rmdstat & RCV_START)
1065                                 {
1066                                         dev->stats.rx_length_errors++;
1067                                         printk(KERN_ERR "%s: recv, packet too long: %d\n",dev->name,rmdp->mlen & 0x0fff);
1068                                 }
1069                         }
1070                         else {
1071                                 if(debuglevel > 2)
1072                                         printk(KERN_ERR "%s: receive-error: %04x, lance-status: %04x/%04x\n",
1073                                                                         dev->name,(int) rmdstat,csr0,(int) inw(PORT+L_DATAREG) );
1074                                 if(rmdstat & RCV_FRAM)
1075                                         dev->stats.rx_frame_errors++;
1076                                 if(rmdstat & RCV_OFLO)
1077                                         dev->stats.rx_over_errors++;
1078                                 if(rmdstat & RCV_CRC)
1079                                         dev->stats.rx_crc_errors++;
1080                                 if(rmdstat & RCV_BUF_ERR)
1081                                         dev->stats.rx_fifo_errors++;
1082                         }
1083                         if(!(csr0 & CSR0_MISS)) /* don't count errors twice */
1084                                 dev->stats.rx_errors++;
1085                 }
1086                 else if( (len = (rmdp->mlen & 0x0fff) - 4) >= 60)
1087                 {
1088 #ifdef RCV_VIA_SKB
1089                         struct sk_buff *skb = alloc_skb(R_BUF_SIZE+2+16,GFP_ATOMIC);
1090                         if (skb)
1091                                 skb_reserve(skb,16);
1092 #else
1093                         struct sk_buff *skb = dev_alloc_skb(len+2);
1094 #endif
1095                         if(skb)
1096                         {
1097                                 skb_reserve(skb,2);
1098 #ifdef RCV_VIA_SKB
1099                                 if( (unsigned long) (skb->data + R_BUF_SIZE) > 0x1000000) {
1100                                         skb_put(skb,len);
1101                                         skb_copy_to_linear_data(skb, (unsigned char *)(p->recv_skb[p->rmdnum]->data),len);
1102                                 }
1103                                 else {
1104                                         struct sk_buff *skb1 = p->recv_skb[p->rmdnum];
1105                                         skb_put(skb,R_BUF_SIZE);
1106                                         p->recv_skb[p->rmdnum] = skb;
1107                                         rmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
1108                                         skb = skb1;
1109                                         skb_trim(skb,len);
1110                                 }
1111 #else
1112                                 skb_put(skb,len);
1113                                 skb_copy_to_linear_data(skb, (unsigned char *) p->recvbounce[p->rmdnum],len);
1114 #endif
1115                                 dev->stats.rx_packets++;
1116                                 dev->stats.rx_bytes += len;
1117                                 skb->protocol=eth_type_trans(skb,dev);
1118                                 netif_rx(skb);
1119                         }
1120                         else
1121                         {
1122                                 printk(KERN_ERR "%s: can't alloc new sk_buff\n",dev->name);
1123                                 dev->stats.rx_dropped++;
1124                         }
1125                 }
1126                 else {
1127                         printk(KERN_INFO "%s: received runt packet\n",dev->name);
1128                         dev->stats.rx_errors++;
1129                 }
1130                 rmdp->blen = -(R_BUF_SIZE-8);
1131                 rmdp->mlen = 0;
1132                 rmdp->u.s.status = RCV_OWN; /* change owner */
1133                 p->rmdnum = (p->rmdnum + 1) & (RMDNUM-1);
1134                 rmdp = p->rmdhead + p->rmdnum;
1135         }
1136 }
1137
1138 /*
1139  * kick xmitter ..
1140  */
1141
1142 static void ni65_timeout(struct net_device *dev)
1143 {
1144         int i;
1145         struct priv *p = dev->ml_priv;
1146
1147         printk(KERN_ERR "%s: xmitter timed out, try to restart!\n",dev->name);
1148         for(i=0;i<TMDNUM;i++)
1149                 printk("%02x ",p->tmdhead[i].u.s.status);
1150         printk("\n");
1151         ni65_lance_reinit(dev);
1152         dev->trans_start = jiffies;
1153         netif_wake_queue(dev);
1154 }
1155
1156 /*
1157  *      Send a packet
1158  */
1159
1160 static int ni65_send_packet(struct sk_buff *skb, struct net_device *dev)
1161 {
1162         struct priv *p = dev->ml_priv;
1163
1164         netif_stop_queue(dev);
1165
1166         if (test_and_set_bit(0, (void*)&p->lock)) {
1167                 printk(KERN_ERR "%s: Queue was locked.\n", dev->name);
1168                 return NETDEV_TX_BUSY;
1169         }
1170
1171         {
1172                 short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
1173                 struct tmd *tmdp;
1174                 unsigned long flags;
1175
1176 #ifdef XMT_VIA_SKB
1177                 if( (unsigned long) (skb->data + skb->len) > 0x1000000) {
1178 #endif
1179
1180                         skb_copy_from_linear_data(skb, p->tmdbounce[p->tmdbouncenum],
1181                                       skb->len > T_BUF_SIZE ? T_BUF_SIZE :
1182                                                               skb->len);
1183                         if (len > skb->len)
1184                                 memset((char *)p->tmdbounce[p->tmdbouncenum]+skb->len, 0, len-skb->len);
1185                         dev_kfree_skb (skb);
1186
1187                         spin_lock_irqsave(&p->ring_lock, flags);
1188                         tmdp = p->tmdhead + p->tmdnum;
1189                         tmdp->u.buffer = (u32) isa_virt_to_bus(p->tmdbounce[p->tmdbouncenum]);
1190                         p->tmdbouncenum = (p->tmdbouncenum + 1) & (TMDNUM - 1);
1191
1192 #ifdef XMT_VIA_SKB
1193                 }
1194                 else {
1195                         spin_lock_irqsave(&p->ring_lock, flags);
1196
1197                         tmdp = p->tmdhead + p->tmdnum;
1198                         tmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
1199                         p->tmd_skb[p->tmdnum] = skb;
1200                 }
1201 #endif
1202                 tmdp->blen = -len;
1203
1204                 tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;
1205                 writedatareg(CSR0_TDMD | CSR0_INEA); /* enable xmit & interrupt */
1206
1207                 p->xmit_queued = 1;
1208                 p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
1209
1210                 if(p->tmdnum != p->tmdlast)
1211                         netif_wake_queue(dev);
1212
1213                 p->lock = 0;
1214                 dev->trans_start = jiffies;
1215
1216                 spin_unlock_irqrestore(&p->ring_lock, flags);
1217         }
1218
1219         return NETDEV_TX_OK;
1220 }
1221
1222 static void set_multicast_list(struct net_device *dev)
1223 {
1224         if(!ni65_lance_reinit(dev))
1225                 printk(KERN_ERR "%s: Can't switch card into MC mode!\n",dev->name);
1226         netif_wake_queue(dev);
1227 }
1228
1229 #ifdef MODULE
1230 static struct net_device *dev_ni65;
1231
1232 module_param(irq, int, 0);
1233 module_param(io, int, 0);
1234 module_param(dma, int, 0);
1235 MODULE_PARM_DESC(irq, "ni6510 IRQ number (ignored for some cards)");
1236 MODULE_PARM_DESC(io, "ni6510 I/O base address");
1237 MODULE_PARM_DESC(dma, "ni6510 ISA DMA channel (ignored for some cards)");
1238
1239 int __init init_module(void)
1240 {
1241         dev_ni65 = ni65_probe(-1);
1242         return IS_ERR(dev_ni65) ? PTR_ERR(dev_ni65) : 0;
1243 }
1244
1245 void __exit cleanup_module(void)
1246 {
1247         unregister_netdev(dev_ni65);
1248         cleanup_card(dev_ni65);
1249         free_netdev(dev_ni65);
1250 }
1251 #endif /* MODULE */
1252
1253 MODULE_LICENSE("GPL");