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xtensa: use the new byteorder headers
[pohmelfs.git] / drivers / net / sun3_82586.c
blobe531302d95f5078680e1065bda74550346574055
1 /*
2 * Sun3 i82586 Ethernet driver
3 *
4 * Cloned from ni52.c for the Sun3 by Sam Creasey (sammy@sammy.net)
5 *
6 * Original copyright follows:
7 * --------------------------
8 *
9 * net-3-driver for the NI5210 card (i82586 Ethernet chip)
10 *
11 * This is an extension to the Linux operating system, and is covered by the
12 * same Gnu Public License that covers that work.
13 *
14 * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
15 * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
16 * --------------------------
17 *
18 * Consult ni52.c for further notes from the original driver.
19 *
20 * This incarnation currently supports the OBIO version of the i82586 chip
21 * used in certain sun3 models. It should be fairly doable to expand this
22 * to support VME if I should every acquire such a board.
23 *
24 */
25
26 static int debuglevel = 0; /* debug-printk 0: off 1: a few 2: more */
27 static int automatic_resume = 0; /* experimental .. better should be zero */
28 static int rfdadd = 0; /* rfdadd=1 may be better for 8K MEM cards */
29 static int fifo=0x8; /* don't change */
30
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/string.h>
34 #include <linux/errno.h>
35 #include <linux/ioport.h>
36 #include <linux/slab.h>
37 #include <linux/interrupt.h>
38 #include <linux/delay.h>
39 #include <linux/init.h>
40 #include <linux/bitops.h>
41 #include <asm/io.h>
42 #include <asm/idprom.h>
43 #include <asm/machines.h>
44 #include <asm/sun3mmu.h>
45 #include <asm/dvma.h>
46 #include <asm/byteorder.h>
47
48 #include <linux/netdevice.h>
49 #include <linux/etherdevice.h>
50 #include <linux/skbuff.h>
51
52 #include "sun3_82586.h"
53
54 #define DRV_NAME "sun3_82586"
55
56 #define DEBUG /* debug on */
57 #define SYSBUSVAL 0 /* 16 Bit */
58 #define SUN3_82586_TOTAL_SIZE PAGE_SIZE
59
60 #define sun3_attn586() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_ATTEN; *(volatile unsigned char *)(dev->base_addr) &= ~IEOB_ATTEN;}
61 #define sun3_reset586() {*(volatile unsigned char *)(dev->base_addr) = 0; udelay(100); *(volatile unsigned char *)(dev->base_addr) = IEOB_NORSET;}
62 #define sun3_disint() {*(volatile unsigned char *)(dev->base_addr) &= ~IEOB_IENAB;}
63 #define sun3_enaint() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_IENAB;}
64 #define sun3_active() {*(volatile unsigned char *)(dev->base_addr) |= (IEOB_IENAB|IEOB_ONAIR|IEOB_NORSET);}
65
66 #define make32(ptr16) (p->memtop + (swab16((unsigned short) (ptr16))) )
67 #define make24(ptr32) (char *)swab32(( ((unsigned long) (ptr32)) - p->base))
68 #define make16(ptr32) (swab16((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop )))
69
70 /******************* how to calculate the buffers *****************************
71
72 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
73 * --------------- in a different (more stable?) mode. Only in this mode it's
74 * possible to configure the driver with 'NO_NOPCOMMANDS'
75
76 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
77 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
78 sizeof(rfd) = 24; sizeof(rbd) = 12;
79 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
80 sizeof(nop_cmd) = 8;
81
82 * if you don't know the driver, better do not change these values: */
83
84 #define RECV_BUFF_SIZE 1536 /* slightly oversized */
85 #define XMIT_BUFF_SIZE 1536 /* slightly oversized */
86 #define NUM_XMIT_BUFFS 1 /* config for 32K shmem */
87 #define NUM_RECV_BUFFS_8 4 /* config for 32K shared mem */
88 #define NUM_RECV_BUFFS_16 9 /* config for 32K shared mem */
89 #define NUM_RECV_BUFFS_32 16 /* config for 32K shared mem */
90 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
91
92 /**************************************************************************/
93
94 /* different DELAYs */
95 #define DELAY(x) mdelay(32 * x);
96 #define DELAY_16(); { udelay(16); }
97 #define DELAY_18(); { udelay(4); }
98
99 /* wait for command with timeout: */
100 #define WAIT_4_SCB_CMD() \
101 { int i; \
102 for(i=0;i<16384;i++) { \
103 if(!p->scb->cmd_cuc) break; \
104 DELAY_18(); \
105 if(i == 16383) { \
106 printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \
107 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
108
109 #define WAIT_4_SCB_CMD_RUC() { int i; \
110 for(i=0;i<16384;i++) { \
111 if(!p->scb->cmd_ruc) break; \
112 DELAY_18(); \
113 if(i == 16383) { \
114 printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \
115 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
116
117 #define WAIT_4_STAT_COMPL(addr) { int i; \
118 for(i=0;i<32767;i++) { \
119 if(swab16((addr)->cmd_status) & STAT_COMPL) break; \
120 DELAY_16(); DELAY_16(); } }
121
122 static int sun3_82586_probe1(struct net_device *dev,int ioaddr);
123 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id);
124 static int sun3_82586_open(struct net_device *dev);
125 static int sun3_82586_close(struct net_device *dev);
126 static int sun3_82586_send_packet(struct sk_buff *,struct net_device *);
127 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev);
128 static void set_multicast_list(struct net_device *dev);
129 static void sun3_82586_timeout(struct net_device *dev);
130 #if 0
131 static void sun3_82586_dump(struct net_device *,void *);
132 #endif
133
134 /* helper-functions */
135 static int init586(struct net_device *dev);
136 static int check586(struct net_device *dev,char *where,unsigned size);
137 static void alloc586(struct net_device *dev);
138 static void startrecv586(struct net_device *dev);
139 static void *alloc_rfa(struct net_device *dev,void *ptr);
140 static void sun3_82586_rcv_int(struct net_device *dev);
141 static void sun3_82586_xmt_int(struct net_device *dev);
142 static void sun3_82586_rnr_int(struct net_device *dev);
143
144 struct priv
145 {
146 struct net_device_stats stats;
147 unsigned long base;
148 char *memtop;
149 long int lock;
150 int reseted;
151 volatile struct rfd_struct *rfd_last,*rfd_top,*rfd_first;
152 volatile struct scp_struct *scp; /* volatile is important */
153 volatile struct iscp_struct *iscp; /* volatile is important */
154 volatile struct scb_struct *scb; /* volatile is important */
155 volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
156 volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
157 #if (NUM_XMIT_BUFFS == 1)
158 volatile struct nop_cmd_struct *nop_cmds[2];
159 #else
160 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
161 #endif
162 volatile int nop_point,num_recv_buffs;
163 volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
164 volatile int xmit_count,xmit_last;
165 };
166
167 /**********************************************
168 * close device
169 */
170 static int sun3_82586_close(struct net_device *dev)
171 {
172 free_irq(dev->irq, dev);
173
174 sun3_reset586(); /* the hard way to stop the receiver */
175
176 netif_stop_queue(dev);
177
178 return 0;
179 }
180
181 /**********************************************
182 * open device
183 */
184 static int sun3_82586_open(struct net_device *dev)
185 {
186 int ret;
187
188 sun3_disint();
189 alloc586(dev);
190 init586(dev);
191 startrecv586(dev);
192 sun3_enaint();
193
194 ret = request_irq(dev->irq, &sun3_82586_interrupt,0,dev->name,dev);
195 if (ret)
196 {
197 sun3_reset586();
198 return ret;
199 }
200
201 netif_start_queue(dev);
202
203 return 0; /* most done by init */
204 }
205
206 /**********************************************
207 * Check to see if there's an 82586 out there.
208 */
209 static int check586(struct net_device *dev,char *where,unsigned size)
210 {
211 struct priv pb;
212 struct priv *p = /* (struct priv *) dev->priv*/ &pb;
213 char *iscp_addr;
214 int i;
215
216 p->base = (unsigned long) dvma_btov(0);
217 p->memtop = (char *)dvma_btov((unsigned long)where);
218 p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
219 memset((char *)p->scp,0, sizeof(struct scp_struct));
220 for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */
221 if(((char *)p->scp)[i])
222 return 0;
223 p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */
224 if(p->scp->sysbus != SYSBUSVAL)
225 return 0;
226
227 iscp_addr = (char *)dvma_btov((unsigned long)where);
228
229 p->iscp = (struct iscp_struct *) iscp_addr;
230 memset((char *)p->iscp,0, sizeof(struct iscp_struct));
231
232 p->scp->iscp = make24(p->iscp);
233 p->iscp->busy = 1;
234
235 sun3_reset586();
236 sun3_attn586();
237 DELAY(1); /* wait a while... */
238
239 if(p->iscp->busy) /* i82586 clears 'busy' after successful init */
240 return 0;
241
242 return 1;
243 }
244
245 /******************************************************************
246 * set iscp at the right place, called by sun3_82586_probe1 and open586.
247 */
248 static void alloc586(struct net_device *dev)
249 {
250 struct priv *p = (struct priv *) dev->priv;
251
252 sun3_reset586();
253 DELAY(1);
254
255 p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
256 p->iscp = (struct iscp_struct *) dvma_btov(dev->mem_start);
257 p->scb = (struct scb_struct *) ((char *)p->iscp + sizeof(struct iscp_struct));
258
259 memset((char *) p->iscp,0,sizeof(struct iscp_struct));
260 memset((char *) p->scp ,0,sizeof(struct scp_struct));
261
262 p->scp->iscp = make24(p->iscp);
263 p->scp->sysbus = SYSBUSVAL;
264 p->iscp->scb_offset = make16(p->scb);
265 p->iscp->scb_base = make24(dvma_btov(dev->mem_start));
266
267 p->iscp->busy = 1;
268 sun3_reset586();
269 sun3_attn586();
270
271 DELAY(1);
272
273 if(p->iscp->busy)
274 printk("%s: Init-Problems (alloc).\n",dev->name);
275
276 p->reseted = 0;
277
278 memset((char *)p->scb,0,sizeof(struct scb_struct));
279 }
280
281 struct net_device * __init sun3_82586_probe(int unit)
282 {
283 struct net_device *dev;
284 unsigned long ioaddr;
285 static int found = 0;
286 int err = -ENOMEM;
287
288 /* check that this machine has an onboard 82586 */
289 switch(idprom->id_machtype) {
290 case SM_SUN3|SM_3_160:
291 case SM_SUN3|SM_3_260:
292 /* these machines have 82586 */
293 break;
294
295 default:
296 return ERR_PTR(-ENODEV);
297 }
298
299 if (found)
300 return ERR_PTR(-ENODEV);
301
302 ioaddr = (unsigned long)ioremap(IE_OBIO, SUN3_82586_TOTAL_SIZE);
303 if (!ioaddr)
304 return ERR_PTR(-ENOMEM);
305 found = 1;
306
307 dev = alloc_etherdev(sizeof(struct priv));
308 if (!dev)
309 goto out;
310 if (unit >= 0) {
311 sprintf(dev->name, "eth%d", unit);
312 netdev_boot_setup_check(dev);
313 }
314
315 dev->irq = IE_IRQ;
316 dev->base_addr = ioaddr;
317 err = sun3_82586_probe1(dev, ioaddr);
318 if (err)
319 goto out1;
320 err = register_netdev(dev);
321 if (err)
322 goto out2;
323 return dev;
324
325 out2:
326 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
327 out1:
328 free_netdev(dev);
329 out:
330 iounmap((void __iomem *)ioaddr);
331 return ERR_PTR(err);
332 }
333
334 static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr)
335 {
336 int i, size, retval;
337
338 if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME))
339 return -EBUSY;
340
341 /* copy in the ethernet address from the prom */
342 for(i = 0; i < 6 ; i++)
343 dev->dev_addr[i] = idprom->id_ethaddr[i];
344
345 printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr);
346
347 /*
348 * check (or search) IO-Memory, 32K
349 */
350 size = 0x8000;
351
352 dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000);
353 dev->mem_end = dev->mem_start + size;
354
355 if(size != 0x2000 && size != 0x4000 && size != 0x8000) {
356 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size);
357 retval = -ENODEV;
358 goto out;
359 }
360 if(!check586(dev,(char *) dev->mem_start,size)) {
361 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
362 retval = -ENODEV;
363 goto out;
364 }
365
366 ((struct priv *) (dev->priv))->memtop = (char *)dvma_btov(dev->mem_start);
367 ((struct priv *) (dev->priv))->base = (unsigned long) dvma_btov(0);
368 alloc586(dev);
369
370 /* set number of receive-buffs according to memsize */
371 if(size == 0x2000)
372 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_8;
373 else if(size == 0x4000)
374 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_16;
375 else
376 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_32;
377
378 printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq);
379
380 dev->open = sun3_82586_open;
381 dev->stop = sun3_82586_close;
382 dev->get_stats = sun3_82586_get_stats;
383 dev->tx_timeout = sun3_82586_timeout;
384 dev->watchdog_timeo = HZ/20;
385 dev->hard_start_xmit = sun3_82586_send_packet;
386 dev->set_multicast_list = set_multicast_list;
387
388 dev->if_port = 0;
389 return 0;
390 out:
391 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
392 return retval;
393 }
394
395
396 static int init586(struct net_device *dev)
397 {
398 void *ptr;
399 int i,result=0;
400 struct priv *p = (struct priv *) dev->priv;
401 volatile struct configure_cmd_struct *cfg_cmd;
402 volatile struct iasetup_cmd_struct *ias_cmd;
403 volatile struct tdr_cmd_struct *tdr_cmd;
404 volatile struct mcsetup_cmd_struct *mc_cmd;
405 struct dev_mc_list *dmi=dev->mc_list;
406 int num_addrs=dev->mc_count;
407
408 ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
409
410 cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
411 cfg_cmd->cmd_status = 0;
412 cfg_cmd->cmd_cmd = swab16(CMD_CONFIGURE | CMD_LAST);
413 cfg_cmd->cmd_link = 0xffff;
414
415 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
416 cfg_cmd->fifo = fifo; /* fifo-limit (8=tx:32/rx:64) */
417 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
418 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
419 cfg_cmd->priority = 0x00;
420 cfg_cmd->ifs = 0x60;
421 cfg_cmd->time_low = 0x00;
422 cfg_cmd->time_high = 0xf2;
423 cfg_cmd->promisc = 0;
424 if(dev->flags & IFF_ALLMULTI) {
425 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
426 if(num_addrs > len) {
427 printk("%s: switching to promisc. mode\n",dev->name);
428 cfg_cmd->promisc = 1;
429 }
430 }
431 if(dev->flags&IFF_PROMISC)
432 cfg_cmd->promisc = 1;
433 cfg_cmd->carr_coll = 0x00;
434
435 p->scb->cbl_offset = make16(cfg_cmd);
436 p->scb->cmd_ruc = 0;
437
438 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
439 sun3_attn586();
440
441 WAIT_4_STAT_COMPL(cfg_cmd);
442
443 if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))
444 {
445 printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status));
446 return 1;
447 }
448
449 /*
450 * individual address setup
451 */
452
453 ias_cmd = (struct iasetup_cmd_struct *)ptr;
454
455 ias_cmd->cmd_status = 0;
456 ias_cmd->cmd_cmd = swab16(CMD_IASETUP | CMD_LAST);
457 ias_cmd->cmd_link = 0xffff;
458
459 memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN);
460
461 p->scb->cbl_offset = make16(ias_cmd);
462
463 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
464 sun3_attn586();
465
466 WAIT_4_STAT_COMPL(ias_cmd);
467
468 if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {
469 printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status));
470 return 1;
471 }
472
473 /*
474 * TDR, wire check .. e.g. no resistor e.t.c
475 */
476
477 tdr_cmd = (struct tdr_cmd_struct *)ptr;
478
479 tdr_cmd->cmd_status = 0;
480 tdr_cmd->cmd_cmd = swab16(CMD_TDR | CMD_LAST);
481 tdr_cmd->cmd_link = 0xffff;
482 tdr_cmd->status = 0;
483
484 p->scb->cbl_offset = make16(tdr_cmd);
485 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
486 sun3_attn586();
487
488 WAIT_4_STAT_COMPL(tdr_cmd);
489
490 if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL))
491 {
492 printk("%s: Problems while running the TDR.\n",dev->name);
493 }
494 else
495 {
496 DELAY_16(); /* wait for result */
497 result = swab16(tdr_cmd->status);
498
499 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
500 sun3_attn586(); /* ack the interrupts */
501
502 if(result & TDR_LNK_OK)
503 ;
504 else if(result & TDR_XCVR_PRB)
505 printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);
506 else if(result & TDR_ET_OPN)
507 printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
508 else if(result & TDR_ET_SRT)
509 {
510 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
511 printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
512 }
513 else
514 printk("%s: TDR: Unknown status %04x\n",dev->name,result);
515 }
516
517 /*
518 * Multicast setup
519 */
520 if(num_addrs && !(dev->flags & IFF_PROMISC) )
521 {
522 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
523 mc_cmd->cmd_status = 0;
524 mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST);
525 mc_cmd->cmd_link = 0xffff;
526 mc_cmd->mc_cnt = swab16(num_addrs * 6);
527
528 for(i=0;i<num_addrs;i++,dmi=dmi->next)
529 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr,6);
530
531 p->scb->cbl_offset = make16(mc_cmd);
532 p->scb->cmd_cuc = CUC_START;
533 sun3_attn586();
534
535 WAIT_4_STAT_COMPL(mc_cmd);
536
537 if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
538 printk("%s: Can't apply multicast-address-list.\n",dev->name);
539 }
540
541 /*
542 * alloc nop/xmit-cmds
543 */
544 #if (NUM_XMIT_BUFFS == 1)
545 for(i=0;i<2;i++)
546 {
547 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
548 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
549 p->nop_cmds[i]->cmd_status = 0;
550 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
551 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
552 }
553 #else
554 for(i=0;i<NUM_XMIT_BUFFS;i++)
555 {
556 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
557 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
558 p->nop_cmds[i]->cmd_status = 0;
559 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
560 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
561 }
562 #endif
563
564 ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */
565
566 /*
567 * alloc xmit-buffs / init xmit_cmds
568 */
569 for(i=0;i<NUM_XMIT_BUFFS;i++)
570 {
571 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
572 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
573 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
574 ptr = (char *) ptr + XMIT_BUFF_SIZE;
575 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
576 ptr = (char *) ptr + sizeof(struct tbd_struct);
577 if((void *)ptr > (void *)dev->mem_end)
578 {
579 printk("%s: not enough shared-mem for your configuration!\n",dev->name);
580 return 1;
581 }
582 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
583 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
584 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
585 p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL);
586 p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT);
587 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
588 p->xmit_buffs[i]->next = 0xffff;
589 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
590 }
591
592 p->xmit_count = 0;
593 p->xmit_last = 0;
594 #ifndef NO_NOPCOMMANDS
595 p->nop_point = 0;
596 #endif
597
598 /*
599 * 'start transmitter'
600 */
601 #ifndef NO_NOPCOMMANDS
602 p->scb->cbl_offset = make16(p->nop_cmds[0]);
603 p->scb->cmd_cuc = CUC_START;
604 sun3_attn586();
605 WAIT_4_SCB_CMD();
606 #else
607 p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
608 p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT);
609 #endif
610
611 /*
612 * ack. interrupts
613 */
614 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
615 sun3_attn586();
616 DELAY_16();
617
618 sun3_enaint();
619 sun3_active();
620
621 return 0;
622 }
623
624 /******************************************************
625 * This is a helper routine for sun3_82586_rnr_int() and init586().
626 * It sets up the Receive Frame Area (RFA).
627 */
628
629 static void *alloc_rfa(struct net_device *dev,void *ptr)
630 {
631 volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
632 volatile struct rbd_struct *rbd;
633 int i;
634 struct priv *p = (struct priv *) dev->priv;
635
636 memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
637 p->rfd_first = rfd;
638
639 for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
640 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
641 rfd[i].rbd_offset = 0xffff;
642 }
643 rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */
644
645 ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
646
647 rbd = (struct rbd_struct *) ptr;
648 ptr = (void *) (rbd + p->num_recv_buffs);
649
650 /* clr descriptors */
651 memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
652
653 for(i=0;i<p->num_recv_buffs;i++)
654 {
655 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
656 rbd[i].size = swab16(RECV_BUFF_SIZE);
657 rbd[i].buffer = make24(ptr);
658 ptr = (char *) ptr + RECV_BUFF_SIZE;
659 }
660
661 p->rfd_top = p->rfd_first;
662 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
663
664 p->scb->rfa_offset = make16(p->rfd_first);
665 p->rfd_first->rbd_offset = make16(rbd);
666
667 return ptr;
668 }
669
670
671 /**************************************************
672 * Interrupt Handler ...
673 */
674
675 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id)
676 {
677 struct net_device *dev = dev_id;
678 unsigned short stat;
679 int cnt=0;
680 struct priv *p;
681
682 if (!dev) {
683 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq);
684 return IRQ_NONE;
685 }
686 p = (struct priv *) dev->priv;
687
688 if(debuglevel > 1)
689 printk("I");
690
691 WAIT_4_SCB_CMD(); /* wait for last command */
692
693 while((stat=p->scb->cus & STAT_MASK))
694 {
695 p->scb->cmd_cuc = stat;
696 sun3_attn586();
697
698 if(stat & STAT_FR) /* received a frame */
699 sun3_82586_rcv_int(dev);
700
701 if(stat & STAT_RNR) /* RU went 'not ready' */
702 {
703 printk("(R)");
704 if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
705 {
706 WAIT_4_SCB_CMD();
707 p->scb->cmd_ruc = RUC_RESUME;
708 sun3_attn586();
709 WAIT_4_SCB_CMD_RUC();
710 }
711 else
712 {
713 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
714 sun3_82586_rnr_int(dev);
715 }
716 }
717
718 if(stat & STAT_CX) /* command with I-bit set complete */
719 sun3_82586_xmt_int(dev);
720
721 #ifndef NO_NOPCOMMANDS
722 if(stat & STAT_CNA) /* CU went 'not ready' */
723 {
724 if(netif_running(dev))
725 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
726 }
727 #endif
728
729 if(debuglevel > 1)
730 printk("%d",cnt++);
731
732 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */
733 if(p->scb->cmd_cuc) /* timed out? */
734 {
735 printk("%s: Acknowledge timed out.\n",dev->name);
736 sun3_disint();
737 break;
738 }
739 }
740
741 if(debuglevel > 1)
742 printk("i");
743 return IRQ_HANDLED;
744 }
745
746 /*******************************************************
747 * receive-interrupt
748 */
749
750 static void sun3_82586_rcv_int(struct net_device *dev)
751 {
752 int status,cnt=0;
753 unsigned short totlen;
754 struct sk_buff *skb;
755 struct rbd_struct *rbd;
756 struct priv *p = (struct priv *) dev->priv;
757
758 if(debuglevel > 0)
759 printk("R");
760
761 for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
762 {
763 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
764
765 if(status & RFD_OK) /* frame received without error? */
766 {
767 if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */
768 {
769 totlen &= RBD_MASK; /* length of this frame */
770 rbd->status = 0;
771 skb = (struct sk_buff *) dev_alloc_skb(totlen+2);
772 if(skb != NULL)
773 {
774 skb_reserve(skb,2);
775 skb_put(skb,totlen);
776 skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen);
777 skb->protocol=eth_type_trans(skb,dev);
778 netif_rx(skb);
779 p->stats.rx_packets++;
780 }
781 else
782 p->stats.rx_dropped++;
783 }
784 else
785 {
786 int rstat;
787 /* free all RBD's until RBD_LAST is set */
788 totlen = 0;
789 while(!((rstat=swab16(rbd->status)) & RBD_LAST))
790 {
791 totlen += rstat & RBD_MASK;
792 if(!rstat)
793 {
794 printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
795 break;
796 }
797 rbd->status = 0;
798 rbd = (struct rbd_struct *) make32(rbd->next);
799 }
800 totlen += rstat & RBD_MASK;
801 rbd->status = 0;
802 printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
803 p->stats.rx_dropped++;
804 }
805 }
806 else /* frame !(ok), only with 'save-bad-frames' */
807 {
808 printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
809 p->stats.rx_errors++;
810 }
811 p->rfd_top->stat_high = 0;
812 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
813 p->rfd_top->rbd_offset = 0xffff;
814 p->rfd_last->last = 0; /* delete RFD_SUSP */
815 p->rfd_last = p->rfd_top;
816 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
817 p->scb->rfa_offset = make16(p->rfd_top);
818
819 if(debuglevel > 0)
820 printk("%d",cnt++);
821 }
822
823 if(automatic_resume)
824 {
825 WAIT_4_SCB_CMD();
826 p->scb->cmd_ruc = RUC_RESUME;
827 sun3_attn586();
828 WAIT_4_SCB_CMD_RUC();
829 }
830
831 #ifdef WAIT_4_BUSY
832 {
833 int i;
834 for(i=0;i<1024;i++)
835 {
836 if(p->rfd_top->status)
837 break;
838 DELAY_16();
839 if(i == 1023)
840 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
841 }
842 }
843 #endif
844
845 #if 0
846 if(!at_least_one)
847 {
848 int i;
849 volatile struct rfd_struct *rfds=p->rfd_top;
850 volatile struct rbd_struct *rbds;
851 printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
852 for(i=0;i< (p->num_recv_buffs+4);i++)
853 {
854 rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
855 printk("%04x:%04x ",rfds->status,rbds->status);
856 rfds = (struct rfd_struct *) make32(rfds->next);
857 }
858 printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
859 printk("\nerrs: %04x %04x rus: %02x, cus: %02x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->rus,(int)p->scb->cus);
860 }
861 old_at_least = at_least_one;
862 #endif
863
864 if(debuglevel > 0)
865 printk("r");
866 }
867
868 /**********************************************************
869 * handle 'Receiver went not ready'.
870 */
871
872 static void sun3_82586_rnr_int(struct net_device *dev)
873 {
874 struct priv *p = (struct priv *) dev->priv;
875
876 p->stats.rx_errors++;
877
878 WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
879 p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
880 sun3_attn586();
881 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */
882
883 alloc_rfa(dev,(char *)p->rfd_first);
884 /* maybe add a check here, before restarting the RU */
885 startrecv586(dev); /* restart RU */
886
887 printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
888
889 }
890
891 /**********************************************************
892 * handle xmit - interrupt
893 */
894
895 static void sun3_82586_xmt_int(struct net_device *dev)
896 {
897 int status;
898 struct priv *p = (struct priv *) dev->priv;
899
900 if(debuglevel > 0)
901 printk("X");
902
903 status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status);
904 if(!(status & STAT_COMPL))
905 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
906
907 if(status & STAT_OK)
908 {
909 p->stats.tx_packets++;
910 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
911 }
912 else
913 {
914 p->stats.tx_errors++;
915 if(status & TCMD_LATECOLL) {
916 printk("%s: late collision detected.\n",dev->name);
917 p->stats.collisions++;
918 }
919 else if(status & TCMD_NOCARRIER) {
920 p->stats.tx_carrier_errors++;
921 printk("%s: no carrier detected.\n",dev->name);
922 }
923 else if(status & TCMD_LOSTCTS)
924 printk("%s: loss of CTS detected.\n",dev->name);
925 else if(status & TCMD_UNDERRUN) {
926 p->stats.tx_fifo_errors++;
927 printk("%s: DMA underrun detected.\n",dev->name);
928 }
929 else if(status & TCMD_MAXCOLL) {
930 printk("%s: Max. collisions exceeded.\n",dev->name);
931 p->stats.collisions += 16;
932 }
933 }
934
935 #if (NUM_XMIT_BUFFS > 1)
936 if( (++p->xmit_last) == NUM_XMIT_BUFFS)
937 p->xmit_last = 0;
938 #endif
939 netif_wake_queue(dev);
940 }
941
942 /***********************************************************
943 * (re)start the receiver
944 */
945
946 static void startrecv586(struct net_device *dev)
947 {
948 struct priv *p = (struct priv *) dev->priv;
949
950 WAIT_4_SCB_CMD();
951 WAIT_4_SCB_CMD_RUC();
952 p->scb->rfa_offset = make16(p->rfd_first);
953 p->scb->cmd_ruc = RUC_START;
954 sun3_attn586(); /* start cmd. */
955 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */
956 }
957
958 static void sun3_82586_timeout(struct net_device *dev)
959 {
960 struct priv *p = (struct priv *) dev->priv;
961 #ifndef NO_NOPCOMMANDS
962 if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
963 {
964 netif_wake_queue(dev);
965 #ifdef DEBUG
966 printk("%s: strange ... timeout with CU active?!?\n",dev->name);
967 printk("%s: X0: %04x N0: %04x N1: %04x %d\n",dev->name,(int)swab16(p->xmit_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[1]->cmd_status),(int)p->nop_point);
968 #endif
969 p->scb->cmd_cuc = CUC_ABORT;
970 sun3_attn586();
971 WAIT_4_SCB_CMD();
972 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
973 p->scb->cmd_cuc = CUC_START;
974 sun3_attn586();
975 WAIT_4_SCB_CMD();
976 dev->trans_start = jiffies;
977 return 0;
978 }
979 #endif
980 {
981 #ifdef DEBUG
982 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
983 printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status));
984 printk("%s: check, whether you set the right interrupt number!\n",dev->name);
985 #endif
986 sun3_82586_close(dev);
987 sun3_82586_open(dev);
988 }
989 dev->trans_start = jiffies;
990 }
991
992 /******************************************************
993 * send frame
994 */
995
996 static int sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev)
997 {
998 int len,i;
999 #ifndef NO_NOPCOMMANDS
1000 int next_nop;
1001 #endif
1002 struct priv *p = (struct priv *) dev->priv;
1003
1004 if(skb->len > XMIT_BUFF_SIZE)
1005 {
1006 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
1007 return 0;
1008 }
1009
1010 netif_stop_queue(dev);
1011
1012 #if(NUM_XMIT_BUFFS > 1)
1013 if(test_and_set_bit(0,(void *) &p->lock)) {
1014 printk("%s: Queue was locked\n",dev->name);
1015 return 1;
1016 }
1017 else
1018 #endif
1019 {
1020 len = skb->len;
1021 if (len < ETH_ZLEN) {
1022 memset((void *)p->xmit_cbuffs[p->xmit_count], 0,
1023 ETH_ZLEN);
1024 len = ETH_ZLEN;
1025 }
1026 skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len);
1027
1028 #if (NUM_XMIT_BUFFS == 1)
1029 # ifdef NO_NOPCOMMANDS
1030
1031 #ifdef DEBUG
1032 if(p->scb->cus & CU_ACTIVE)
1033 {
1034 printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
1035 printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status));
1036 }
1037 #endif
1038
1039 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1040 for(i=0;i<16;i++)
1041 {
1042 p->xmit_cmds[0]->cmd_status = 0;
1043 WAIT_4_SCB_CMD();
1044 if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
1045 p->scb->cmd_cuc = CUC_RESUME;
1046 else
1047 {
1048 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1049 p->scb->cmd_cuc = CUC_START;
1050 }
1051
1052 sun3_attn586();
1053 dev->trans_start = jiffies;
1054 if(!i)
1055 dev_kfree_skb(skb);
1056 WAIT_4_SCB_CMD();
1057 if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
1058 break;
1059 if(p->xmit_cmds[0]->cmd_status)
1060 break;
1061 if(i==15)
1062 printk("%s: Can't start transmit-command.\n",dev->name);
1063 }
1064 # else
1065 next_nop = (p->nop_point + 1) & 0x1;
1066 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1067
1068 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1069 = make16((p->nop_cmds[next_nop]));
1070 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1071
1072 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1073 dev->trans_start = jiffies;
1074 p->nop_point = next_nop;
1075 dev_kfree_skb(skb);
1076 # endif
1077 #else
1078 p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len);
1079 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
1080 next_nop = 0;
1081
1082 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1083 /* linkpointer of xmit-command already points to next nop cmd */
1084 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
1085 p->nop_cmds[next_nop]->cmd_status = 0;
1086
1087 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1088 dev->trans_start = jiffies;
1089 p->xmit_count = next_nop;
1090
1091 {
1092 unsigned long flags;
1093 local_irq_save(flags);
1094 if(p->xmit_count != p->xmit_last)
1095 netif_wake_queue(dev);
1096 p->lock = 0;
1097 local_irq_restore(flags);
1098 }
1099 dev_kfree_skb(skb);
1100 #endif
1101 }
1102 return 0;
1103 }
1104
1105 /*******************************************
1106 * Someone wanna have the statistics
1107 */
1108
1109 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev)
1110 {
1111 struct priv *p = (struct priv *) dev->priv;
1112 unsigned short crc,aln,rsc,ovrn;
1113
1114 crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */
1115 p->scb->crc_errs = 0;
1116 aln = swab16(p->scb->aln_errs);
1117 p->scb->aln_errs = 0;
1118 rsc = swab16(p->scb->rsc_errs);
1119 p->scb->rsc_errs = 0;
1120 ovrn = swab16(p->scb->ovrn_errs);
1121 p->scb->ovrn_errs = 0;
1122
1123 p->stats.rx_crc_errors += crc;
1124 p->stats.rx_fifo_errors += ovrn;
1125 p->stats.rx_frame_errors += aln;
1126 p->stats.rx_dropped += rsc;
1127
1128 return &p->stats;
1129 }
1130
1131 /********************************************************
1132 * Set MC list ..
1133 */
1134
1135 static void set_multicast_list(struct net_device *dev)
1136 {
1137 netif_stop_queue(dev);
1138 sun3_disint();
1139 alloc586(dev);
1140 init586(dev);
1141 startrecv586(dev);
1142 sun3_enaint();
1143 netif_wake_queue(dev);
1144 }
1145
1146 #ifdef MODULE
1147 #error This code is not currently supported as a module
1148 static struct net_device *dev_sun3_82586;
1149
1150 int init_module(void)
1151 {
1152 dev_sun3_82586 = sun3_82586_probe(-1);
1153 if (IS_ERR(dev_sun3_82586))
1154 return PTR_ERR(dev_sun3_82586);
1155 return 0;
1156 }
1157
1158 void cleanup_module(void)
1159 {
1160 unsigned long ioaddr = dev_sun3_82586->base_addr;
1161 unregister_netdev(dev_sun3_82586);
1162 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
1163 iounmap((void *)ioaddr);
1164 free_netdev(dev_sun3_82586);
1165 }
1166 #endif /* MODULE */
1167
1168 #if 0
1169 /*
1170 * DUMP .. we expect a not running CMD unit and enough space
1171 */
1172 void sun3_82586_dump(struct net_device *dev,void *ptr)
1173 {
1174 struct priv *p = (struct priv *) dev->priv;
1175 struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
1176 int i;
1177
1178 p->scb->cmd_cuc = CUC_ABORT;
1179 sun3_attn586();
1180 WAIT_4_SCB_CMD();
1181 WAIT_4_SCB_CMD_RUC();
1182
1183 dump_cmd->cmd_status = 0;
1184 dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
1185 dump_cmd->dump_offset = make16((dump_cmd + 1));
1186 dump_cmd->cmd_link = 0xffff;
1187
1188 p->scb->cbl_offset = make16(dump_cmd);
1189 p->scb->cmd_cuc = CUC_START;
1190 sun3_attn586();
1191 WAIT_4_STAT_COMPL(dump_cmd);
1192
1193 if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
1194 printk("%s: Can't get dump information.\n",dev->name);
1195
1196 for(i=0;i<170;i++) {
1197 printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);
1198 if(i % 24 == 23)
1199 printk("\n");
1200 }
1201 printk("\n");
1202 }
1203 #endif
1204
1205 MODULE_LICENSE("GPL");