09768524511281d06fd881f9faabdd4c4717e1bf
[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  * 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         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  */