net: wireless: sd8797: Marvell sd8797 Wi-Fi driver
[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 netdev_tx_t ni65_send_packet(struct sk_buff *skb,
256                                     struct net_device *dev);
257 static void  ni65_timeout(struct net_device *dev);
258 static int  ni65_close(struct net_device *dev);
259 static int  ni65_alloc_buffer(struct net_device *dev);
260 static void ni65_free_buffer(struct priv *p);
261 static void set_multicast_list(struct net_device *dev);
262
263 static int irqtab[] __initdata = { 9,12,15,5 }; /* irq config-translate */
264 static int dmatab[] __initdata = { 0,3,5,6,7 }; /* dma config-translate and autodetect */
265
266 static int debuglevel = 1;
267
268 /*
269  * set 'performance' registers .. we must STOP lance for that
270  */
271 static void ni65_set_performance(struct priv *p)
272 {
273         writereg(CSR0_STOP | CSR0_CLRALL,CSR0); /* STOP */
274
275         if( !(cards[p->cardno].config & 0x02) )
276                 return;
277
278         outw(80,PORT+L_ADDRREG);
279         if(inw(PORT+L_ADDRREG) != 80)
280                 return;
281
282         writereg( (csr80 & 0x3fff) ,80); /* FIFO watermarks */
283         outw(0,PORT+L_ADDRREG);
284         outw((short)isa0,PORT+L_BUSIF); /* write ISA 0: DMA_R : isa0 * 50ns */
285         outw(1,PORT+L_ADDRREG);
286         outw((short)isa1,PORT+L_BUSIF); /* write ISA 1: DMA_W : isa1 * 50ns     */
287
288         outw(CSR0,PORT+L_ADDRREG);      /* switch back to CSR0 */
289 }
290
291 /*
292  * open interface (up)
293  */
294 static int ni65_open(struct net_device *dev)
295 {
296         struct priv *p = dev->ml_priv;
297         int irqval = request_irq(dev->irq, ni65_interrupt,0,
298                         cards[p->cardno].cardname,dev);
299         if (irqval) {
300                 printk(KERN_ERR "%s: unable to get IRQ %d (irqval=%d).\n",
301                           dev->name,dev->irq, irqval);
302                 return -EAGAIN;
303         }
304
305         if(ni65_lance_reinit(dev))
306         {
307                 netif_start_queue(dev);
308                 return 0;
309         }
310         else
311         {
312                 free_irq(dev->irq,dev);
313                 return -EAGAIN;
314         }
315 }
316
317 /*
318  * close interface (down)
319  */
320 static int ni65_close(struct net_device *dev)
321 {
322         struct priv *p = dev->ml_priv;
323
324         netif_stop_queue(dev);
325
326         outw(inw(PORT+L_RESET),PORT+L_RESET); /* that's the hard way */
327
328 #ifdef XMT_VIA_SKB
329         {
330                 int i;
331                 for(i=0;i<TMDNUM;i++)
332                 {
333                         if(p->tmd_skb[i]) {
334                                 dev_kfree_skb(p->tmd_skb[i]);
335                                 p->tmd_skb[i] = NULL;
336                         }
337                 }
338         }
339 #endif
340         free_irq(dev->irq,dev);
341         return 0;
342 }
343
344 static void cleanup_card(struct net_device *dev)
345 {
346         struct priv *p = dev->ml_priv;
347         disable_dma(dev->dma);
348         free_dma(dev->dma);
349         release_region(dev->base_addr, cards[p->cardno].total_size);
350         ni65_free_buffer(p);
351 }
352
353 /* set: io,irq,dma or set it when calling insmod */
354 static int irq;
355 static int io;
356 static int dma;
357
358 /*
359  * Probe The Card (not the lance-chip)
360  */
361 struct net_device * __init ni65_probe(int unit)
362 {
363         struct net_device *dev = alloc_etherdev(0);
364         static const int ports[] = { 0x360, 0x300, 0x320, 0x340, 0 };
365         const int *port;
366         int err = 0;
367
368         if (!dev)
369                 return ERR_PTR(-ENOMEM);
370
371         if (unit >= 0) {
372                 sprintf(dev->name, "eth%d", unit);
373                 netdev_boot_setup_check(dev);
374                 irq = dev->irq;
375                 dma = dev->dma;
376         } else {
377                 dev->base_addr = io;
378         }
379
380         if (dev->base_addr > 0x1ff) { /* Check a single specified location. */
381                 err = ni65_probe1(dev, dev->base_addr);
382         } else if (dev->base_addr > 0) { /* Don't probe at all. */
383                 err = -ENXIO;
384         } else {
385                 for (port = ports; *port && ni65_probe1(dev, *port); port++)
386                         ;
387                 if (!*port)
388                         err = -ENODEV;
389         }
390         if (err)
391                 goto out;
392
393         err = register_netdev(dev);
394         if (err)
395                 goto out1;
396         return dev;
397 out1:
398         cleanup_card(dev);
399 out:
400         free_netdev(dev);
401         return ERR_PTR(err);
402 }
403
404 static const struct net_device_ops ni65_netdev_ops = {
405         .ndo_open               = ni65_open,
406         .ndo_stop               = ni65_close,
407         .ndo_start_xmit         = ni65_send_packet,
408         .ndo_tx_timeout         = ni65_timeout,
409         .ndo_set_multicast_list = set_multicast_list,
410         .ndo_change_mtu         = eth_change_mtu,
411         .ndo_set_mac_address    = eth_mac_addr,
412         .ndo_validate_addr      = eth_validate_addr,
413 };
414
415 /*
416  * this is the real card probe ..
417  */
418 static int __init ni65_probe1(struct net_device *dev,int ioaddr)
419 {
420         int i,j;
421         struct priv *p;
422         unsigned long flags;
423
424         dev->irq = irq;
425         dev->dma = dma;
426
427         for(i=0;i<NUM_CARDS;i++) {
428                 if(!request_region(ioaddr, cards[i].total_size, cards[i].cardname))
429                         continue;
430                 if(cards[i].id_offset >= 0) {
431                         if(inb(ioaddr+cards[i].id_offset+0) != cards[i].id0 ||
432                                  inb(ioaddr+cards[i].id_offset+1) != cards[i].id1) {
433                                  release_region(ioaddr, cards[i].total_size);
434                                  continue;
435                         }
436                 }
437                 if(cards[i].vendor_id) {
438                         for(j=0;j<3;j++)
439                                 if(inb(ioaddr+cards[i].addr_offset+j) != cards[i].vendor_id[j]) {
440                                         release_region(ioaddr, cards[i].total_size);
441                                         continue;
442                           }
443                 }
444                 break;
445         }
446         if(i == NUM_CARDS)
447                 return -ENODEV;
448
449         for(j=0;j<6;j++)
450                 dev->dev_addr[j] = inb(ioaddr+cards[i].addr_offset+j);
451
452         if( (j=ni65_alloc_buffer(dev)) < 0) {
453                 release_region(ioaddr, cards[i].total_size);
454                 return j;
455         }
456         p = dev->ml_priv;
457         p->cmdr_addr = ioaddr + cards[i].cmd_offset;
458         p->cardno = i;
459         spin_lock_init(&p->ring_lock);
460
461         printk(KERN_INFO "%s: %s found at %#3x, ", dev->name, cards[p->cardno].cardname , ioaddr);
462
463         outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
464         if( (j=readreg(CSR0)) != 0x4) {
465                  printk("failed.\n");
466                  printk(KERN_ERR "%s: Can't RESET card: %04x\n", dev->name, j);
467                  ni65_free_buffer(p);
468                  release_region(ioaddr, cards[p->cardno].total_size);
469                  return -EAGAIN;
470         }
471
472         outw(88,PORT+L_ADDRREG);
473         if(inw(PORT+L_ADDRREG) == 88) {
474                 unsigned long v;
475                 v = inw(PORT+L_DATAREG);
476                 v <<= 16;
477                 outw(89,PORT+L_ADDRREG);
478                 v |= inw(PORT+L_DATAREG);
479                 printk("Version %#08lx, ",v);
480                 p->features = INIT_RING_BEFORE_START;
481         }
482         else {
483                 printk("ancient LANCE, ");
484                 p->features = 0x0;
485         }
486
487         if(test_bit(0,&cards[i].config)) {
488                 dev->irq = irqtab[(inw(ioaddr+L_CONFIG)>>2)&3];
489                 dev->dma = dmatab[inw(ioaddr+L_CONFIG)&3];
490                 printk("IRQ %d (from card), DMA %d (from card).\n",dev->irq,dev->dma);
491         }
492         else {
493                 if(dev->dma == 0) {
494                 /* 'stuck test' from lance.c */
495                         unsigned long dma_channels =
496                                 ((inb(DMA1_STAT_REG) >> 4) & 0x0f)
497                                 | (inb(DMA2_STAT_REG) & 0xf0);
498                         for(i=1;i<5;i++) {
499                                 int dma = dmatab[i];
500                                 if(test_bit(dma,&dma_channels) || request_dma(dma,"ni6510"))
501                                         continue;
502
503                                 flags=claim_dma_lock();
504                                 disable_dma(dma);
505                                 set_dma_mode(dma,DMA_MODE_CASCADE);
506                                 enable_dma(dma);
507                                 release_dma_lock(flags);
508
509                                 ni65_init_lance(p,dev->dev_addr,0,0); /* trigger memory access */
510
511                                 flags=claim_dma_lock();
512                                 disable_dma(dma);
513                                 free_dma(dma);
514                                 release_dma_lock(flags);
515
516                                 if(readreg(CSR0) & CSR0_IDON)
517                                         break;
518                         }
519                         if(i == 5) {
520                                 printk("failed.\n");
521                                 printk(KERN_ERR "%s: Can't detect DMA channel!\n", dev->name);
522                                 ni65_free_buffer(p);
523                                 release_region(ioaddr, cards[p->cardno].total_size);
524                                 return -EAGAIN;
525                         }
526                         dev->dma = dmatab[i];
527                         printk("DMA %d (autodetected), ",dev->dma);
528                 }
529                 else
530                         printk("DMA %d (assigned), ",dev->dma);
531
532                 if(dev->irq < 2)
533                 {
534                         unsigned long irq_mask;
535
536                         ni65_init_lance(p,dev->dev_addr,0,0);
537                         irq_mask = probe_irq_on();
538                         writereg(CSR0_INIT|CSR0_INEA,CSR0); /* trigger interrupt */
539                         msleep(20);
540                         dev->irq = probe_irq_off(irq_mask);
541                         if(!dev->irq)
542                         {
543                                 printk("Failed to detect IRQ line!\n");
544                                 ni65_free_buffer(p);
545                                 release_region(ioaddr, cards[p->cardno].total_size);
546                                 return -EAGAIN;
547                         }
548                         printk("IRQ %d (autodetected).\n",dev->irq);
549                 }
550                 else
551                         printk("IRQ %d (assigned).\n",dev->irq);
552         }
553
554         if(request_dma(dev->dma, cards[p->cardno].cardname ) != 0)
555         {
556                 printk(KERN_ERR "%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma);
557                 ni65_free_buffer(p);
558                 release_region(ioaddr, cards[p->cardno].total_size);
559                 return -EAGAIN;
560         }
561
562         dev->base_addr = ioaddr;
563         dev->netdev_ops = &ni65_netdev_ops;
564         dev->watchdog_timeo     = HZ/2;
565
566         return 0; /* everything is OK */
567 }
568
569 /*
570  * set lance register and trigger init
571  */
572 static void ni65_init_lance(struct priv *p,unsigned char *daddr,int filter,int mode)
573 {
574         int i;
575         u32 pib;
576
577         writereg(CSR0_CLRALL|CSR0_STOP,CSR0);
578
579         for(i=0;i<6;i++)
580                 p->ib.eaddr[i] = daddr[i];
581
582         for(i=0;i<8;i++)
583                 p->ib.filter[i] = filter;
584         p->ib.mode = mode;
585
586         p->ib.trp = (u32) isa_virt_to_bus(p->tmdhead) | TMDNUMMASK;
587         p->ib.rrp = (u32) isa_virt_to_bus(p->rmdhead) | RMDNUMMASK;
588         writereg(0,CSR3);       /* busmaster/no word-swap */
589         pib = (u32) isa_virt_to_bus(&p->ib);
590         writereg(pib & 0xffff,CSR1);
591         writereg(pib >> 16,CSR2);
592
593         writereg(CSR0_INIT,CSR0); /* this changes L_ADDRREG to CSR0 */
594
595         for(i=0;i<32;i++)
596         {
597                 mdelay(4);
598                 if(inw(PORT+L_DATAREG) & (CSR0_IDON | CSR0_MERR) )
599                         break; /* init ok ? */
600         }
601 }
602
603 /*
604  * allocate memory area and check the 16MB border
605  */
606 static void *ni65_alloc_mem(struct net_device *dev,char *what,int size,int type)
607 {
608         struct sk_buff *skb=NULL;
609         unsigned char *ptr;
610         void *ret;
611
612         if(type) {
613                 ret = skb = alloc_skb(2+16+size,GFP_KERNEL|GFP_DMA);
614                 if(!skb) {
615                         printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
616                         return NULL;
617                 }
618                 skb_reserve(skb,2+16);
619                 skb_put(skb,R_BUF_SIZE);         /* grab the whole space .. (not necessary) */
620                 ptr = skb->data;
621         }
622         else {
623                 ret = ptr = kmalloc(T_BUF_SIZE,GFP_KERNEL | GFP_DMA);
624                 if(!ret) {
625                         printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
626                         return NULL;
627                 }
628         }
629         if( (u32) virt_to_phys(ptr+size) > 0x1000000) {
630                 printk(KERN_WARNING "%s: unable to allocate %s memory in lower 16MB!\n",dev->name,what);
631                 if(type)
632                         kfree_skb(skb);
633                 else
634                         kfree(ptr);
635                 return NULL;
636         }
637         return ret;
638 }
639
640 /*
641  * allocate all memory structures .. send/recv buffers etc ...
642  */
643 static int ni65_alloc_buffer(struct net_device *dev)
644 {
645         unsigned char *ptr;
646         struct priv *p;
647         int i;
648
649         /*
650          * we need 8-aligned memory ..
651          */
652         ptr = ni65_alloc_mem(dev,"BUFFER",sizeof(struct priv)+8,0);
653         if(!ptr)
654                 return -ENOMEM;
655
656         p = dev->ml_priv = (struct priv *) (((unsigned long) ptr + 7) & ~0x7);
657         memset((char *)p, 0, sizeof(struct priv));
658         p->self = ptr;
659
660         for(i=0;i<TMDNUM;i++)
661         {
662 #ifdef XMT_VIA_SKB
663                 p->tmd_skb[i] = NULL;
664 #endif
665                 p->tmdbounce[i] = ni65_alloc_mem(dev,"XMIT",T_BUF_SIZE,0);
666                 if(!p->tmdbounce[i]) {
667                         ni65_free_buffer(p);
668                         return -ENOMEM;
669                 }
670         }
671
672         for(i=0;i<RMDNUM;i++)
673         {
674 #ifdef RCV_VIA_SKB
675                 p->recv_skb[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,1);
676                 if(!p->recv_skb[i]) {
677                         ni65_free_buffer(p);
678                         return -ENOMEM;
679                 }
680 #else
681                 p->recvbounce[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,0);
682                 if(!p->recvbounce[i]) {
683                         ni65_free_buffer(p);
684                         return -ENOMEM;
685                 }
686 #endif
687         }
688
689         return 0; /* everything is OK */
690 }
691
692 /*
693  * free buffers and private struct
694  */
695 static void ni65_free_buffer(struct priv *p)
696 {
697         int i;
698
699         if(!p)
700                 return;
701
702         for(i=0;i<TMDNUM;i++) {
703                 kfree(p->tmdbounce[i]);
704 #ifdef XMT_VIA_SKB
705                 if(p->tmd_skb[i])
706                         dev_kfree_skb(p->tmd_skb[i]);
707 #endif
708         }
709
710         for(i=0;i<RMDNUM;i++)
711         {
712 #ifdef RCV_VIA_SKB
713                 if(p->recv_skb[i])
714                         dev_kfree_skb(p->recv_skb[i]);
715 #else
716                 kfree(p->recvbounce[i]);
717 #endif
718         }
719         kfree(p->self);
720 }
721
722
723 /*
724  * stop and (re)start lance .. e.g after an error
725  */
726 static void ni65_stop_start(struct net_device *dev,struct priv *p)
727 {
728         int csr0 = CSR0_INEA;
729
730         writedatareg(CSR0_STOP);
731
732         if(debuglevel > 1)
733                 printk(KERN_DEBUG "ni65_stop_start\n");
734
735         if(p->features & INIT_RING_BEFORE_START) {
736                 int i;
737 #ifdef XMT_VIA_SKB
738                 struct sk_buff *skb_save[TMDNUM];
739 #endif
740                 unsigned long buffer[TMDNUM];
741                 short blen[TMDNUM];
742
743                 if(p->xmit_queued) {
744                         while(1) {
745                                 if((p->tmdhead[p->tmdlast].u.s.status & XMIT_OWN))
746                                         break;
747                                 p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
748                                 if(p->tmdlast == p->tmdnum)
749                                         break;
750                         }
751                 }
752
753                 for(i=0;i<TMDNUM;i++) {
754                         struct tmd *tmdp = p->tmdhead + i;
755 #ifdef XMT_VIA_SKB
756                         skb_save[i] = p->tmd_skb[i];
757 #endif
758                         buffer[i] = (u32) isa_bus_to_virt(tmdp->u.buffer);
759                         blen[i] = tmdp->blen;
760                         tmdp->u.s.status = 0x0;
761                 }
762
763                 for(i=0;i<RMDNUM;i++) {
764                         struct rmd *rmdp = p->rmdhead + i;
765                         rmdp->u.s.status = RCV_OWN;
766                 }
767                 p->tmdnum = p->xmit_queued = 0;
768                 writedatareg(CSR0_STRT | csr0);
769
770                 for(i=0;i<TMDNUM;i++) {
771                         int num = (i + p->tmdlast) & (TMDNUM-1);
772                         p->tmdhead[i].u.buffer = (u32) isa_virt_to_bus((char *)buffer[num]); /* status is part of buffer field */
773                         p->tmdhead[i].blen = blen[num];
774                         if(p->tmdhead[i].u.s.status & XMIT_OWN) {
775                                  p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
776                                  p->xmit_queued = 1;
777          writedatareg(CSR0_TDMD | CSR0_INEA | csr0);
778                         }
779 #ifdef XMT_VIA_SKB
780                         p->tmd_skb[i] = skb_save[num];
781 #endif
782                 }
783                 p->rmdnum = p->tmdlast = 0;
784                 if(!p->lock)
785                         if (p->tmdnum || !p->xmit_queued)
786                                 netif_wake_queue(dev);
787                 dev->trans_start = jiffies; /* prevent tx timeout */
788         }
789         else
790                 writedatareg(CSR0_STRT | csr0);
791 }
792
793 /*
794  * init lance (write init-values .. init-buffers) (open-helper)
795  */
796 static int ni65_lance_reinit(struct net_device *dev)
797 {
798          int i;
799          struct priv *p = dev->ml_priv;
800          unsigned long flags;
801
802          p->lock = 0;
803          p->xmit_queued = 0;
804
805          flags=claim_dma_lock();
806          disable_dma(dev->dma); /* I've never worked with dma, but we do it like the packetdriver */
807          set_dma_mode(dev->dma,DMA_MODE_CASCADE);
808          enable_dma(dev->dma);
809          release_dma_lock(flags);
810
811          outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
812          if( (i=readreg(CSR0) ) != 0x4)
813          {
814                  printk(KERN_ERR "%s: can't RESET %s card: %04x\n",dev->name,
815                                                         cards[p->cardno].cardname,(int) i);
816                  flags=claim_dma_lock();
817                  disable_dma(dev->dma);
818                  release_dma_lock(flags);
819                  return 0;
820          }
821
822          p->rmdnum = p->tmdnum = p->tmdlast = p->tmdbouncenum = 0;
823          for(i=0;i<TMDNUM;i++)
824          {
825                  struct tmd *tmdp = p->tmdhead + i;
826 #ifdef XMT_VIA_SKB
827                  if(p->tmd_skb[i]) {
828                          dev_kfree_skb(p->tmd_skb[i]);
829                          p->tmd_skb[i] = NULL;
830                  }
831 #endif
832                  tmdp->u.buffer = 0x0;
833                  tmdp->u.s.status = XMIT_START | XMIT_END;
834                  tmdp->blen = tmdp->status2 = 0;
835          }
836
837          for(i=0;i<RMDNUM;i++)
838          {
839                  struct rmd *rmdp = p->rmdhead + i;
840 #ifdef RCV_VIA_SKB
841                  rmdp->u.buffer = (u32) isa_virt_to_bus(p->recv_skb[i]->data);
842 #else
843                  rmdp->u.buffer = (u32) isa_virt_to_bus(p->recvbounce[i]);
844 #endif
845                  rmdp->blen = -(R_BUF_SIZE-8);
846                  rmdp->mlen = 0;
847                  rmdp->u.s.status = RCV_OWN;
848          }
849
850          if(dev->flags & IFF_PROMISC)
851                  ni65_init_lance(p,dev->dev_addr,0x00,M_PROM);
852          else if (netdev_mc_count(dev) || dev->flags & IFF_ALLMULTI)
853                  ni65_init_lance(p,dev->dev_addr,0xff,0x0);
854          else
855                  ni65_init_lance(p,dev->dev_addr,0x00,0x00);
856
857         /*
858          * ni65_set_lance_mem() sets L_ADDRREG to CSR0
859          * NOW, WE WILL NEVER CHANGE THE L_ADDRREG, CSR0 IS ALWAYS SELECTED
860          */
861
862          if(inw(PORT+L_DATAREG) & CSR0_IDON)    {
863                  ni65_set_performance(p);
864                                          /* init OK: start lance , enable interrupts */
865                  writedatareg(CSR0_CLRALL | CSR0_INEA | CSR0_STRT);
866                  return 1; /* ->OK */
867          }
868          printk(KERN_ERR "%s: can't init lance, status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG));
869          flags=claim_dma_lock();
870          disable_dma(dev->dma);
871          release_dma_lock(flags);
872          return 0; /* ->Error */
873 }
874
875 /*
876  * interrupt handler
877  */
878 static irqreturn_t ni65_interrupt(int irq, void * dev_id)
879 {
880         int csr0 = 0;
881         struct net_device *dev = dev_id;
882         struct priv *p;
883         int bcnt = 32;
884
885         p = dev->ml_priv;
886
887         spin_lock(&p->ring_lock);
888
889         while(--bcnt) {
890                 csr0 = inw(PORT+L_DATAREG);
891
892 #if 0
893                 writedatareg( (csr0 & CSR0_CLRALL) ); /* ack interrupts, disable int. */
894 #else
895                 writedatareg( (csr0 & CSR0_CLRALL) | CSR0_INEA ); /* ack interrupts, interrupts enabled */
896 #endif
897
898                 if(!(csr0 & (CSR0_ERR | CSR0_RINT | CSR0_TINT)))
899                         break;
900
901                 if(csr0 & CSR0_RINT) /* RECV-int? */
902                         ni65_recv_intr(dev,csr0);
903                 if(csr0 & CSR0_TINT) /* XMIT-int? */
904                         ni65_xmit_intr(dev,csr0);
905
906                 if(csr0 & CSR0_ERR)
907                 {
908                         if(debuglevel > 1)
909                                 printk(KERN_ERR "%s: general error: %04x.\n",dev->name,csr0);
910                         if(csr0 & CSR0_BABL)
911                                 dev->stats.tx_errors++;
912                         if(csr0 & CSR0_MISS) {
913                                 int i;
914                                 for(i=0;i<RMDNUM;i++)
915                                         printk("%02x ",p->rmdhead[i].u.s.status);
916                                 printk("\n");
917                                 dev->stats.rx_errors++;
918                         }
919                         if(csr0 & CSR0_MERR) {
920                                 if(debuglevel > 1)
921                                         printk(KERN_ERR "%s: Ooops .. memory error: %04x.\n",dev->name,csr0);
922                                 ni65_stop_start(dev,p);
923                         }
924                 }
925         }
926
927 #ifdef RCV_PARANOIA_CHECK
928 {
929  int j;
930  for(j=0;j<RMDNUM;j++)
931  {
932         int i, num2;
933         for(i=RMDNUM-1;i>0;i--) {
934                  num2 = (p->rmdnum + i) & (RMDNUM-1);
935                  if(!(p->rmdhead[num2].u.s.status & RCV_OWN))
936                                 break;
937         }
938
939         if(i) {
940                 int k, num1;
941                 for(k=0;k<RMDNUM;k++) {
942                         num1 = (p->rmdnum + k) & (RMDNUM-1);
943                         if(!(p->rmdhead[num1].u.s.status & RCV_OWN))
944                                 break;
945                 }
946                 if(!k)
947                         break;
948
949                 if(debuglevel > 0)
950                 {
951                         char buf[256],*buf1;
952                         buf1 = buf;
953                         for(k=0;k<RMDNUM;k++) {
954                                 sprintf(buf1,"%02x ",(p->rmdhead[k].u.s.status)); /* & RCV_OWN) ); */
955                                 buf1 += 3;
956                         }
957                         *buf1 = 0;
958                         printk(KERN_ERR "%s: Ooops, receive ring corrupted %2d %2d | %s\n",dev->name,p->rmdnum,i,buf);
959                 }
960
961                 p->rmdnum = num1;
962                 ni65_recv_intr(dev,csr0);
963                 if((p->rmdhead[num2].u.s.status & RCV_OWN))
964                         break;  /* ok, we are 'in sync' again */
965         }
966         else
967                 break;
968  }
969 }
970 #endif
971
972         if( (csr0 & (CSR0_RXON | CSR0_TXON)) != (CSR0_RXON | CSR0_TXON) ) {
973                 printk(KERN_DEBUG "%s: RX or TX was offline -> restart\n",dev->name);
974                 ni65_stop_start(dev,p);
975         }
976         else
977                 writedatareg(CSR0_INEA);
978
979         spin_unlock(&p->ring_lock);
980         return IRQ_HANDLED;
981 }
982
983 /*
984  * We have received an Xmit-Interrupt ..
985  * send a new packet if necessary
986  */
987 static void ni65_xmit_intr(struct net_device *dev,int csr0)
988 {
989         struct priv *p = dev->ml_priv;
990
991         while(p->xmit_queued)
992         {
993                 struct tmd *tmdp = p->tmdhead + p->tmdlast;
994                 int tmdstat = tmdp->u.s.status;
995
996                 if(tmdstat & XMIT_OWN)
997                         break;
998
999                 if(tmdstat & XMIT_ERR)
1000                 {
1001 #if 0
1002                         if(tmdp->status2 & XMIT_TDRMASK && debuglevel > 3)
1003                                 printk(KERN_ERR "%s: tdr-problems (e.g. no resistor)\n",dev->name);
1004 #endif
1005                  /* checking some errors */
1006                         if(tmdp->status2 & XMIT_RTRY)
1007                                 dev->stats.tx_aborted_errors++;
1008                         if(tmdp->status2 & XMIT_LCAR)
1009                                 dev->stats.tx_carrier_errors++;
1010                         if(tmdp->status2 & (XMIT_BUFF | XMIT_UFLO )) {
1011                 /* this stops the xmitter */
1012                                 dev->stats.tx_fifo_errors++;
1013                                 if(debuglevel > 0)
1014                                         printk(KERN_ERR "%s: Xmit FIFO/BUFF error\n",dev->name);
1015                                 if(p->features & INIT_RING_BEFORE_START) {
1016                                         tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;    /* test: resend this frame */
1017                                         ni65_stop_start(dev,p);
1018                                         break;  /* no more Xmit processing .. */
1019                                 }
1020                                 else
1021                                  ni65_stop_start(dev,p);
1022                         }
1023                         if(debuglevel > 2)
1024                                 printk(KERN_ERR "%s: xmit-error: %04x %02x-%04x\n",dev->name,csr0,(int) tmdstat,(int) tmdp->status2);
1025                         if(!(csr0 & CSR0_BABL)) /* don't count errors twice */
1026                                 dev->stats.tx_errors++;
1027                         tmdp->status2 = 0;
1028                 }
1029                 else {
1030                         dev->stats.tx_bytes -= (short)(tmdp->blen);
1031                         dev->stats.tx_packets++;
1032                 }
1033
1034 #ifdef XMT_VIA_SKB
1035                 if(p->tmd_skb[p->tmdlast]) {
1036                          dev_kfree_skb_irq(p->tmd_skb[p->tmdlast]);
1037                          p->tmd_skb[p->tmdlast] = NULL;
1038                 }
1039 #endif
1040
1041                 p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
1042                 if(p->tmdlast == p->tmdnum)
1043                         p->xmit_queued = 0;
1044         }
1045         netif_wake_queue(dev);
1046 }
1047
1048 /*
1049  * We have received a packet
1050  */
1051 static void ni65_recv_intr(struct net_device *dev,int csr0)
1052 {
1053         struct rmd *rmdp;
1054         int rmdstat,len;
1055         int cnt=0;
1056         struct priv *p = dev->ml_priv;
1057
1058         rmdp = p->rmdhead + p->rmdnum;
1059         while(!( (rmdstat = rmdp->u.s.status) & RCV_OWN))
1060         {
1061                 cnt++;
1062                 if( (rmdstat & (RCV_START | RCV_END | RCV_ERR)) != (RCV_START | RCV_END) ) /* error or oversized? */
1063                 {
1064                         if(!(rmdstat & RCV_ERR)) {
1065                                 if(rmdstat & RCV_START)
1066                                 {
1067                                         dev->stats.rx_length_errors++;
1068                                         printk(KERN_ERR "%s: recv, packet too long: %d\n",dev->name,rmdp->mlen & 0x0fff);
1069                                 }
1070                         }
1071                         else {
1072                                 if(debuglevel > 2)
1073                                         printk(KERN_ERR "%s: receive-error: %04x, lance-status: %04x/%04x\n",
1074                                                                         dev->name,(int) rmdstat,csr0,(int) inw(PORT+L_DATAREG) );
1075                                 if(rmdstat & RCV_FRAM)
1076                                         dev->stats.rx_frame_errors++;
1077                                 if(rmdstat & RCV_OFLO)
1078                                         dev->stats.rx_over_errors++;
1079                                 if(rmdstat & RCV_CRC)
1080                                         dev->stats.rx_crc_errors++;
1081                                 if(rmdstat & RCV_BUF_ERR)
1082                                         dev->stats.rx_fifo_errors++;
1083                         }
1084                         if(!(csr0 & CSR0_MISS)) /* don't count errors twice */
1085                                 dev->stats.rx_errors++;
1086                 }
1087                 else if( (len = (rmdp->mlen & 0x0fff) - 4) >= 60)
1088                 {
1089 #ifdef RCV_VIA_SKB
1090                         struct sk_buff *skb = alloc_skb(R_BUF_SIZE+2+16,GFP_ATOMIC);
1091                         if (skb)
1092                                 skb_reserve(skb,16);
1093 #else
1094                         struct sk_buff *skb = dev_alloc_skb(len+2);
1095 #endif
1096                         if(skb)
1097                         {
1098                                 skb_reserve(skb,2);
1099 #ifdef RCV_VIA_SKB
1100                                 if( (unsigned long) (skb->data + R_BUF_SIZE) > 0x1000000) {
1101                                         skb_put(skb,len);
1102                                         skb_copy_to_linear_data(skb, (unsigned char *)(p->recv_skb[p->rmdnum]->data),len);
1103                                 }
1104                                 else {
1105                                         struct sk_buff *skb1 = p->recv_skb[p->rmdnum];
1106                                         skb_put(skb,R_BUF_SIZE);
1107                                         p->recv_skb[p->rmdnum] = skb;
1108                                         rmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
1109                                         skb = skb1;
1110                                         skb_trim(skb,len);
1111                                 }
1112 #else
1113                                 skb_put(skb,len);
1114                                 skb_copy_to_linear_data(skb, (unsigned char *) p->recvbounce[p->rmdnum],len);
1115 #endif
1116                                 dev->stats.rx_packets++;
1117                                 dev->stats.rx_bytes += len;
1118                                 skb->protocol=eth_type_trans(skb,dev);
1119                                 netif_rx(skb);
1120                         }
1121                         else
1122                         {
1123                                 printk(KERN_ERR "%s: can't alloc new sk_buff\n",dev->name);
1124                                 dev->stats.rx_dropped++;
1125                         }
1126                 }
1127                 else {
1128                         printk(KERN_INFO "%s: received runt packet\n",dev->name);
1129                         dev->stats.rx_errors++;
1130                 }
1131                 rmdp->blen = -(R_BUF_SIZE-8);
1132                 rmdp->mlen = 0;
1133                 rmdp->u.s.status = RCV_OWN; /* change owner */
1134                 p->rmdnum = (p->rmdnum + 1) & (RMDNUM-1);
1135                 rmdp = p->rmdhead + p->rmdnum;
1136         }
1137 }
1138
1139 /*
1140  * kick xmitter ..
1141  */
1142
1143 static void ni65_timeout(struct net_device *dev)
1144 {
1145         int i;
1146         struct priv *p = dev->ml_priv;
1147
1148         printk(KERN_ERR "%s: xmitter timed out, try to restart!\n",dev->name);
1149         for(i=0;i<TMDNUM;i++)
1150                 printk("%02x ",p->tmdhead[i].u.s.status);
1151         printk("\n");
1152         ni65_lance_reinit(dev);
1153         dev->trans_start = jiffies; /* prevent tx timeout */
1154         netif_wake_queue(dev);
1155 }
1156
1157 /*
1158  *      Send a packet
1159  */
1160
1161 static netdev_tx_t ni65_send_packet(struct sk_buff *skb,
1162                                     struct net_device *dev)
1163 {
1164         struct priv *p = dev->ml_priv;
1165
1166         netif_stop_queue(dev);
1167
1168         if (test_and_set_bit(0, (void*)&p->lock)) {
1169                 printk(KERN_ERR "%s: Queue was locked.\n", dev->name);
1170                 return NETDEV_TX_BUSY;
1171         }
1172
1173         {
1174                 short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
1175                 struct tmd *tmdp;
1176                 unsigned long flags;
1177
1178 #ifdef XMT_VIA_SKB
1179                 if( (unsigned long) (skb->data + skb->len) > 0x1000000) {
1180 #endif
1181
1182                         skb_copy_from_linear_data(skb, p->tmdbounce[p->tmdbouncenum],
1183                                       skb->len > T_BUF_SIZE ? T_BUF_SIZE :
1184                                                               skb->len);
1185                         if (len > skb->len)
1186                                 memset((char *)p->tmdbounce[p->tmdbouncenum]+skb->len, 0, len-skb->len);
1187                         dev_kfree_skb (skb);
1188
1189                         spin_lock_irqsave(&p->ring_lock, flags);
1190                         tmdp = p->tmdhead + p->tmdnum;
1191                         tmdp->u.buffer = (u32) isa_virt_to_bus(p->tmdbounce[p->tmdbouncenum]);
1192                         p->tmdbouncenum = (p->tmdbouncenum + 1) & (TMDNUM - 1);
1193
1194 #ifdef XMT_VIA_SKB
1195                 }
1196                 else {
1197                         spin_lock_irqsave(&p->ring_lock, flags);
1198
1199                         tmdp = p->tmdhead + p->tmdnum;
1200                         tmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
1201                         p->tmd_skb[p->tmdnum] = skb;
1202                 }
1203 #endif
1204                 tmdp->blen = -len;
1205
1206                 tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;
1207                 writedatareg(CSR0_TDMD | CSR0_INEA); /* enable xmit & interrupt */
1208
1209                 p->xmit_queued = 1;
1210                 p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
1211
1212                 if(p->tmdnum != p->tmdlast)
1213                         netif_wake_queue(dev);
1214
1215                 p->lock = 0;
1216
1217                 spin_unlock_irqrestore(&p->ring_lock, flags);
1218         }
1219
1220         return NETDEV_TX_OK;
1221 }
1222
1223 static void set_multicast_list(struct net_device *dev)
1224 {
1225         if(!ni65_lance_reinit(dev))
1226                 printk(KERN_ERR "%s: Can't switch card into MC mode!\n",dev->name);
1227         netif_wake_queue(dev);
1228 }
1229
1230 #ifdef MODULE
1231 static struct net_device *dev_ni65;
1232
1233 module_param(irq, int, 0);
1234 module_param(io, int, 0);
1235 module_param(dma, int, 0);
1236 MODULE_PARM_DESC(irq, "ni6510 IRQ number (ignored for some cards)");
1237 MODULE_PARM_DESC(io, "ni6510 I/O base address");
1238 MODULE_PARM_DESC(dma, "ni6510 ISA DMA channel (ignored for some cards)");
1239
1240 int __init init_module(void)
1241 {
1242         dev_ni65 = ni65_probe(-1);
1243         return IS_ERR(dev_ni65) ? PTR_ERR(dev_ni65) : 0;
1244 }
1245
1246 void __exit cleanup_module(void)
1247 {
1248         unregister_netdev(dev_ni65);
1249         cleanup_card(dev_ni65);
1250         free_netdev(dev_ni65);
1251 }
1252 #endif /* MODULE */
1253
1254 MODULE_LICENSE("GPL");