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kbuild: document howto build external modules using several directories
[linux-2.6/verdex.git] / drivers / net / sun3_82586.c
blobd5a58fb30d3a194772ce3da84b83a3a934100184
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 /* #define REALLY_SLOW_IO */
32
33 #include <linux/module.h>
34 #include <linux/kernel.h>
35 #include <linux/string.h>
36 #include <linux/errno.h>
37 #include <linux/ioport.h>
38 #include <linux/slab.h>
39 #include <linux/interrupt.h>
40 #include <linux/delay.h>
41 #include <linux/init.h>
42 #include <linux/bitops.h>
43 #include <asm/io.h>
44 #include <asm/idprom.h>
45 #include <asm/machines.h>
46 #include <asm/sun3mmu.h>
47 #include <asm/dvma.h>
48 #include <asm/byteorder.h>
49
50 #include <linux/netdevice.h>
51 #include <linux/etherdevice.h>
52 #include <linux/skbuff.h>
53
54 #include "sun3_82586.h"
55
56 #define DRV_NAME "sun3_82586"
57
58 #define DEBUG /* debug on */
59 #define SYSBUSVAL 0 /* 16 Bit */
60 #define SUN3_82586_TOTAL_SIZE PAGE_SIZE
61
62 #define sun3_attn586() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_ATTEN; *(volatile unsigned char *)(dev->base_addr) &= ~IEOB_ATTEN;}
63 #define sun3_reset586() {*(volatile unsigned char *)(dev->base_addr) = 0; udelay(100); *(volatile unsigned char *)(dev->base_addr) = IEOB_NORSET;}
64 #define sun3_disint() {*(volatile unsigned char *)(dev->base_addr) &= ~IEOB_IENAB;}
65 #define sun3_enaint() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_IENAB;}
66 #define sun3_active() {*(volatile unsigned char *)(dev->base_addr) |= (IEOB_IENAB|IEOB_ONAIR|IEOB_NORSET);}
67
68 #define make32(ptr16) (p->memtop + (swab16((unsigned short) (ptr16))) )
69 #define make24(ptr32) (char *)swab32(( ((unsigned long) (ptr32)) - p->base))
70 #define make16(ptr32) (swab16((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop )))
71
72 /******************* how to calculate the buffers *****************************
73
74 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
75 * --------------- in a different (more stable?) mode. Only in this mode it's
76 * possible to configure the driver with 'NO_NOPCOMMANDS'
77
78 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
79 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
80 sizeof(rfd) = 24; sizeof(rbd) = 12;
81 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
82 sizeof(nop_cmd) = 8;
83
84 * if you don't know the driver, better do not change these values: */
85
86 #define RECV_BUFF_SIZE 1536 /* slightly oversized */
87 #define XMIT_BUFF_SIZE 1536 /* slightly oversized */
88 #define NUM_XMIT_BUFFS 1 /* config for 32K shmem */
89 #define NUM_RECV_BUFFS_8 4 /* config for 32K shared mem */
90 #define NUM_RECV_BUFFS_16 9 /* config for 32K shared mem */
91 #define NUM_RECV_BUFFS_32 16 /* config for 32K shared mem */
92 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
93
94 /**************************************************************************/
95
96 /* different DELAYs */
97 #define DELAY(x) mdelay(32 * x);
98 #define DELAY_16(); { udelay(16); }
99 #define DELAY_18(); { udelay(4); }
100
101 /* wait for command with timeout: */
102 #define WAIT_4_SCB_CMD() \
103 { int i; \
104 for(i=0;i<16384;i++) { \
105 if(!p->scb->cmd_cuc) break; \
106 DELAY_18(); \
107 if(i == 16383) { \
108 printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \
109 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
110
111 #define WAIT_4_SCB_CMD_RUC() { int i; \
112 for(i=0;i<16384;i++) { \
113 if(!p->scb->cmd_ruc) break; \
114 DELAY_18(); \
115 if(i == 16383) { \
116 printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \
117 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
118
119 #define WAIT_4_STAT_COMPL(addr) { int i; \
120 for(i=0;i<32767;i++) { \
121 if(swab16((addr)->cmd_status) & STAT_COMPL) break; \
122 DELAY_16(); DELAY_16(); } }
123
124 static int sun3_82586_probe1(struct net_device *dev,int ioaddr);
125 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id,struct pt_regs *reg_ptr);
126 static int sun3_82586_open(struct net_device *dev);
127 static int sun3_82586_close(struct net_device *dev);
128 static int sun3_82586_send_packet(struct sk_buff *,struct net_device *);
129 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev);
130 static void set_multicast_list(struct net_device *dev);
131 static void sun3_82586_timeout(struct net_device *dev);
132 #if 0
133 static void sun3_82586_dump(struct net_device *,void *);
134 #endif
135
136 /* helper-functions */
137 static int init586(struct net_device *dev);
138 static int check586(struct net_device *dev,char *where,unsigned size);
139 static void alloc586(struct net_device *dev);
140 static void startrecv586(struct net_device *dev);
141 static void *alloc_rfa(struct net_device *dev,void *ptr);
142 static void sun3_82586_rcv_int(struct net_device *dev);
143 static void sun3_82586_xmt_int(struct net_device *dev);
144 static void sun3_82586_rnr_int(struct net_device *dev);
145
146 struct priv
147 {
148 struct net_device_stats stats;
149 unsigned long base;
150 char *memtop;
151 long int lock;
152 int reseted;
153 volatile struct rfd_struct *rfd_last,*rfd_top,*rfd_first;
154 volatile struct scp_struct *scp; /* volatile is important */
155 volatile struct iscp_struct *iscp; /* volatile is important */
156 volatile struct scb_struct *scb; /* volatile is important */
157 volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
158 volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
159 #if (NUM_XMIT_BUFFS == 1)
160 volatile struct nop_cmd_struct *nop_cmds[2];
161 #else
162 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
163 #endif
164 volatile int nop_point,num_recv_buffs;
165 volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
166 volatile int xmit_count,xmit_last;
167 };
168
169 /**********************************************
170 * close device
171 */
172 static int sun3_82586_close(struct net_device *dev)
173 {
174 free_irq(dev->irq, dev);
175
176 sun3_reset586(); /* the hard way to stop the receiver */
177
178 netif_stop_queue(dev);
179
180 return 0;
181 }
182
183 /**********************************************
184 * open device
185 */
186 static int sun3_82586_open(struct net_device *dev)
187 {
188 int ret;
189
190 sun3_disint();
191 alloc586(dev);
192 init586(dev);
193 startrecv586(dev);
194 sun3_enaint();
195
196 ret = request_irq(dev->irq, &sun3_82586_interrupt,0,dev->name,dev);
197 if (ret)
198 {
199 sun3_reset586();
200 return ret;
201 }
202
203 netif_start_queue(dev);
204
205 return 0; /* most done by init */
206 }
207
208 /**********************************************
209 * Check to see if there's an 82586 out there.
210 */
211 static int check586(struct net_device *dev,char *where,unsigned size)
212 {
213 struct priv pb;
214 struct priv *p = /* (struct priv *) dev->priv*/ &pb;
215 char *iscp_addr;
216 int i;
217
218 p->base = (unsigned long) dvma_btov(0);
219 p->memtop = (char *)dvma_btov((unsigned long)where);
220 p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
221 memset((char *)p->scp,0, sizeof(struct scp_struct));
222 for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */
223 if(((char *)p->scp)[i])
224 return 0;
225 p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */
226 if(p->scp->sysbus != SYSBUSVAL)
227 return 0;
228
229 iscp_addr = (char *)dvma_btov((unsigned long)where);
230
231 p->iscp = (struct iscp_struct *) iscp_addr;
232 memset((char *)p->iscp,0, sizeof(struct iscp_struct));
233
234 p->scp->iscp = make24(p->iscp);
235 p->iscp->busy = 1;
236
237 sun3_reset586();
238 sun3_attn586();
239 DELAY(1); /* wait a while... */
240
241 if(p->iscp->busy) /* i82586 clears 'busy' after successful init */
242 return 0;
243
244 return 1;
245 }
246
247 /******************************************************************
248 * set iscp at the right place, called by sun3_82586_probe1 and open586.
249 */
250 static void alloc586(struct net_device *dev)
251 {
252 struct priv *p = (struct priv *) dev->priv;
253
254 sun3_reset586();
255 DELAY(1);
256
257 p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
258 p->iscp = (struct iscp_struct *) dvma_btov(dev->mem_start);
259 p->scb = (struct scb_struct *) ((char *)p->iscp + sizeof(struct iscp_struct));
260
261 memset((char *) p->iscp,0,sizeof(struct iscp_struct));
262 memset((char *) p->scp ,0,sizeof(struct scp_struct));
263
264 p->scp->iscp = make24(p->iscp);
265 p->scp->sysbus = SYSBUSVAL;
266 p->iscp->scb_offset = make16(p->scb);
267 p->iscp->scb_base = make24(dvma_btov(dev->mem_start));
268
269 p->iscp->busy = 1;
270 sun3_reset586();
271 sun3_attn586();
272
273 DELAY(1);
274
275 if(p->iscp->busy)
276 printk("%s: Init-Problems (alloc).\n",dev->name);
277
278 p->reseted = 0;
279
280 memset((char *)p->scb,0,sizeof(struct scb_struct));
281 }
282
283 struct net_device * __init sun3_82586_probe(int unit)
284 {
285 struct net_device *dev;
286 unsigned long ioaddr;
287 static int found = 0;
288 int err = -ENOMEM;
289
290 /* check that this machine has an onboard 82586 */
291 switch(idprom->id_machtype) {
292 case SM_SUN3|SM_3_160:
293 case SM_SUN3|SM_3_260:
294 /* these machines have 82586 */
295 break;
296
297 default:
298 return ERR_PTR(-ENODEV);
299 }
300
301 if (found)
302 return ERR_PTR(-ENODEV);
303
304 ioaddr = (unsigned long)ioremap(IE_OBIO, SUN3_82586_TOTAL_SIZE);
305 if (!ioaddr)
306 return ERR_PTR(-ENOMEM);
307 found = 1;
308
309 dev = alloc_etherdev(sizeof(struct priv));
310 if (!dev)
311 goto out;
312 if (unit >= 0) {
313 sprintf(dev->name, "eth%d", unit);
314 netdev_boot_setup_check(dev);
315 }
316 SET_MODULE_OWNER(dev);
317
318 dev->irq = IE_IRQ;
319 dev->base_addr = ioaddr;
320 err = sun3_82586_probe1(dev, ioaddr);
321 if (err)
322 goto out1;
323 err = register_netdev(dev);
324 if (err)
325 goto out2;
326 return dev;
327
328 out2:
329 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
330 out1:
331 free_netdev(dev);
332 out:
333 iounmap((void *)ioaddr);
334 return ERR_PTR(err);
335 }
336
337 static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr)
338 {
339 int i, size, retval;
340
341 if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME))
342 return -EBUSY;
343
344 /* copy in the ethernet address from the prom */
345 for(i = 0; i < 6 ; i++)
346 dev->dev_addr[i] = idprom->id_ethaddr[i];
347
348 printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr);
349
350 /*
351 * check (or search) IO-Memory, 32K
352 */
353 size = 0x8000;
354
355 dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000);
356 dev->mem_end = dev->mem_start + size;
357
358 if(size != 0x2000 && size != 0x4000 && size != 0x8000) {
359 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size);
360 retval = -ENODEV;
361 goto out;
362 }
363 if(!check586(dev,(char *) dev->mem_start,size)) {
364 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
365 retval = -ENODEV;
366 goto out;
367 }
368
369 ((struct priv *) (dev->priv))->memtop = (char *)dvma_btov(dev->mem_start);
370 ((struct priv *) (dev->priv))->base = (unsigned long) dvma_btov(0);
371 alloc586(dev);
372
373 /* set number of receive-buffs according to memsize */
374 if(size == 0x2000)
375 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_8;
376 else if(size == 0x4000)
377 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_16;
378 else
379 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_32;
380
381 printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq);
382
383 dev->open = sun3_82586_open;
384 dev->stop = sun3_82586_close;
385 dev->get_stats = sun3_82586_get_stats;
386 dev->tx_timeout = sun3_82586_timeout;
387 dev->watchdog_timeo = HZ/20;
388 dev->hard_start_xmit = sun3_82586_send_packet;
389 dev->set_multicast_list = set_multicast_list;
390
391 dev->if_port = 0;
392 return 0;
393 out:
394 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
395 return retval;
396 }
397
398
399 static int init586(struct net_device *dev)
400 {
401 void *ptr;
402 int i,result=0;
403 struct priv *p = (struct priv *) dev->priv;
404 volatile struct configure_cmd_struct *cfg_cmd;
405 volatile struct iasetup_cmd_struct *ias_cmd;
406 volatile struct tdr_cmd_struct *tdr_cmd;
407 volatile struct mcsetup_cmd_struct *mc_cmd;
408 struct dev_mc_list *dmi=dev->mc_list;
409 int num_addrs=dev->mc_count;
410
411 ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
412
413 cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
414 cfg_cmd->cmd_status = 0;
415 cfg_cmd->cmd_cmd = swab16(CMD_CONFIGURE | CMD_LAST);
416 cfg_cmd->cmd_link = 0xffff;
417
418 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
419 cfg_cmd->fifo = fifo; /* fifo-limit (8=tx:32/rx:64) */
420 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
421 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
422 cfg_cmd->priority = 0x00;
423 cfg_cmd->ifs = 0x60;
424 cfg_cmd->time_low = 0x00;
425 cfg_cmd->time_high = 0xf2;
426 cfg_cmd->promisc = 0;
427 if(dev->flags & IFF_ALLMULTI) {
428 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
429 if(num_addrs > len) {
430 printk("%s: switching to promisc. mode\n",dev->name);
431 dev->flags|=IFF_PROMISC;
432 }
433 }
434 if(dev->flags&IFF_PROMISC)
435 {
436 cfg_cmd->promisc=1;
437 dev->flags|=IFF_PROMISC;
438 }
439 cfg_cmd->carr_coll = 0x00;
440
441 p->scb->cbl_offset = make16(cfg_cmd);
442 p->scb->cmd_ruc = 0;
443
444 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
445 sun3_attn586();
446
447 WAIT_4_STAT_COMPL(cfg_cmd);
448
449 if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))
450 {
451 printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status));
452 return 1;
453 }
454
455 /*
456 * individual address setup
457 */
458
459 ias_cmd = (struct iasetup_cmd_struct *)ptr;
460
461 ias_cmd->cmd_status = 0;
462 ias_cmd->cmd_cmd = swab16(CMD_IASETUP | CMD_LAST);
463 ias_cmd->cmd_link = 0xffff;
464
465 memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN);
466
467 p->scb->cbl_offset = make16(ias_cmd);
468
469 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
470 sun3_attn586();
471
472 WAIT_4_STAT_COMPL(ias_cmd);
473
474 if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {
475 printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status));
476 return 1;
477 }
478
479 /*
480 * TDR, wire check .. e.g. no resistor e.t.c
481 */
482
483 tdr_cmd = (struct tdr_cmd_struct *)ptr;
484
485 tdr_cmd->cmd_status = 0;
486 tdr_cmd->cmd_cmd = swab16(CMD_TDR | CMD_LAST);
487 tdr_cmd->cmd_link = 0xffff;
488 tdr_cmd->status = 0;
489
490 p->scb->cbl_offset = make16(tdr_cmd);
491 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
492 sun3_attn586();
493
494 WAIT_4_STAT_COMPL(tdr_cmd);
495
496 if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL))
497 {
498 printk("%s: Problems while running the TDR.\n",dev->name);
499 }
500 else
501 {
502 DELAY_16(); /* wait for result */
503 result = swab16(tdr_cmd->status);
504
505 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
506 sun3_attn586(); /* ack the interrupts */
507
508 if(result & TDR_LNK_OK)
509 ;
510 else if(result & TDR_XCVR_PRB)
511 printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);
512 else if(result & TDR_ET_OPN)
513 printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
514 else if(result & TDR_ET_SRT)
515 {
516 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
517 printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
518 }
519 else
520 printk("%s: TDR: Unknown status %04x\n",dev->name,result);
521 }
522
523 /*
524 * Multicast setup
525 */
526 if(num_addrs && !(dev->flags & IFF_PROMISC) )
527 {
528 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
529 mc_cmd->cmd_status = 0;
530 mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST);
531 mc_cmd->cmd_link = 0xffff;
532 mc_cmd->mc_cnt = swab16(num_addrs * 6);
533
534 for(i=0;i<num_addrs;i++,dmi=dmi->next)
535 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr,6);
536
537 p->scb->cbl_offset = make16(mc_cmd);
538 p->scb->cmd_cuc = CUC_START;
539 sun3_attn586();
540
541 WAIT_4_STAT_COMPL(mc_cmd);
542
543 if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
544 printk("%s: Can't apply multicast-address-list.\n",dev->name);
545 }
546
547 /*
548 * alloc nop/xmit-cmds
549 */
550 #if (NUM_XMIT_BUFFS == 1)
551 for(i=0;i<2;i++)
552 {
553 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
554 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
555 p->nop_cmds[i]->cmd_status = 0;
556 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
557 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
558 }
559 #else
560 for(i=0;i<NUM_XMIT_BUFFS;i++)
561 {
562 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
563 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
564 p->nop_cmds[i]->cmd_status = 0;
565 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
566 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
567 }
568 #endif
569
570 ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */
571
572 /*
573 * alloc xmit-buffs / init xmit_cmds
574 */
575 for(i=0;i<NUM_XMIT_BUFFS;i++)
576 {
577 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
578 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
579 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
580 ptr = (char *) ptr + XMIT_BUFF_SIZE;
581 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
582 ptr = (char *) ptr + sizeof(struct tbd_struct);
583 if((void *)ptr > (void *)dev->mem_end)
584 {
585 printk("%s: not enough shared-mem for your configuration!\n",dev->name);
586 return 1;
587 }
588 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
589 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
590 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
591 p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL);
592 p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT);
593 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
594 p->xmit_buffs[i]->next = 0xffff;
595 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
596 }
597
598 p->xmit_count = 0;
599 p->xmit_last = 0;
600 #ifndef NO_NOPCOMMANDS
601 p->nop_point = 0;
602 #endif
603
604 /*
605 * 'start transmitter'
606 */
607 #ifndef NO_NOPCOMMANDS
608 p->scb->cbl_offset = make16(p->nop_cmds[0]);
609 p->scb->cmd_cuc = CUC_START;
610 sun3_attn586();
611 WAIT_4_SCB_CMD();
612 #else
613 p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
614 p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT);
615 #endif
616
617 /*
618 * ack. interrupts
619 */
620 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
621 sun3_attn586();
622 DELAY_16();
623
624 sun3_enaint();
625 sun3_active();
626
627 return 0;
628 }
629
630 /******************************************************
631 * This is a helper routine for sun3_82586_rnr_int() and init586().
632 * It sets up the Receive Frame Area (RFA).
633 */
634
635 static void *alloc_rfa(struct net_device *dev,void *ptr)
636 {
637 volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
638 volatile struct rbd_struct *rbd;
639 int i;
640 struct priv *p = (struct priv *) dev->priv;
641
642 memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
643 p->rfd_first = rfd;
644
645 for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
646 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
647 rfd[i].rbd_offset = 0xffff;
648 }
649 rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */
650
651 ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
652
653 rbd = (struct rbd_struct *) ptr;
654 ptr = (void *) (rbd + p->num_recv_buffs);
655
656 /* clr descriptors */
657 memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
658
659 for(i=0;i<p->num_recv_buffs;i++)
660 {
661 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
662 rbd[i].size = swab16(RECV_BUFF_SIZE);
663 rbd[i].buffer = make24(ptr);
664 ptr = (char *) ptr + RECV_BUFF_SIZE;
665 }
666
667 p->rfd_top = p->rfd_first;
668 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
669
670 p->scb->rfa_offset = make16(p->rfd_first);
671 p->rfd_first->rbd_offset = make16(rbd);
672
673 return ptr;
674 }
675
676
677 /**************************************************
678 * Interrupt Handler ...
679 */
680
681 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id,struct pt_regs *reg_ptr)
682 {
683 struct net_device *dev = dev_id;
684 unsigned short stat;
685 int cnt=0;
686 struct priv *p;
687
688 if (!dev) {
689 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq);
690 return IRQ_NONE;
691 }
692 p = (struct priv *) dev->priv;
693
694 if(debuglevel > 1)
695 printk("I");
696
697 WAIT_4_SCB_CMD(); /* wait for last command */
698
699 while((stat=p->scb->cus & STAT_MASK))
700 {
701 p->scb->cmd_cuc = stat;
702 sun3_attn586();
703
704 if(stat & STAT_FR) /* received a frame */
705 sun3_82586_rcv_int(dev);
706
707 if(stat & STAT_RNR) /* RU went 'not ready' */
708 {
709 printk("(R)");
710 if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
711 {
712 WAIT_4_SCB_CMD();
713 p->scb->cmd_ruc = RUC_RESUME;
714 sun3_attn586();
715 WAIT_4_SCB_CMD_RUC();
716 }
717 else
718 {
719 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
720 sun3_82586_rnr_int(dev);
721 }
722 }
723
724 if(stat & STAT_CX) /* command with I-bit set complete */
725 sun3_82586_xmt_int(dev);
726
727 #ifndef NO_NOPCOMMANDS
728 if(stat & STAT_CNA) /* CU went 'not ready' */
729 {
730 if(netif_running(dev))
731 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
732 }
733 #endif
734
735 if(debuglevel > 1)
736 printk("%d",cnt++);
737
738 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */
739 if(p->scb->cmd_cuc) /* timed out? */
740 {
741 printk("%s: Acknowledge timed out.\n",dev->name);
742 sun3_disint();
743 break;
744 }
745 }
746
747 if(debuglevel > 1)
748 printk("i");
749 return IRQ_HANDLED;
750 }
751
752 /*******************************************************
753 * receive-interrupt
754 */
755
756 static void sun3_82586_rcv_int(struct net_device *dev)
757 {
758 int status,cnt=0;
759 unsigned short totlen;
760 struct sk_buff *skb;
761 struct rbd_struct *rbd;
762 struct priv *p = (struct priv *) dev->priv;
763
764 if(debuglevel > 0)
765 printk("R");
766
767 for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
768 {
769 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
770
771 if(status & RFD_OK) /* frame received without error? */
772 {
773 if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */
774 {
775 totlen &= RBD_MASK; /* length of this frame */
776 rbd->status = 0;
777 skb = (struct sk_buff *) dev_alloc_skb(totlen+2);
778 if(skb != NULL)
779 {
780 skb->dev = dev;
781 skb_reserve(skb,2);
782 skb_put(skb,totlen);
783 eth_copy_and_sum(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen,0);
784 skb->protocol=eth_type_trans(skb,dev);
785 netif_rx(skb);
786 p->stats.rx_packets++;
787 }
788 else
789 p->stats.rx_dropped++;
790 }
791 else
792 {
793 int rstat;
794 /* free all RBD's until RBD_LAST is set */
795 totlen = 0;
796 while(!((rstat=swab16(rbd->status)) & RBD_LAST))
797 {
798 totlen += rstat & RBD_MASK;
799 if(!rstat)
800 {
801 printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
802 break;
803 }
804 rbd->status = 0;
805 rbd = (struct rbd_struct *) make32(rbd->next);
806 }
807 totlen += rstat & RBD_MASK;
808 rbd->status = 0;
809 printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
810 p->stats.rx_dropped++;
811 }
812 }
813 else /* frame !(ok), only with 'save-bad-frames' */
814 {
815 printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
816 p->stats.rx_errors++;
817 }
818 p->rfd_top->stat_high = 0;
819 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
820 p->rfd_top->rbd_offset = 0xffff;
821 p->rfd_last->last = 0; /* delete RFD_SUSP */
822 p->rfd_last = p->rfd_top;
823 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
824 p->scb->rfa_offset = make16(p->rfd_top);
825
826 if(debuglevel > 0)
827 printk("%d",cnt++);
828 }
829
830 if(automatic_resume)
831 {
832 WAIT_4_SCB_CMD();
833 p->scb->cmd_ruc = RUC_RESUME;
834 sun3_attn586();
835 WAIT_4_SCB_CMD_RUC();
836 }
837
838 #ifdef WAIT_4_BUSY
839 {
840 int i;
841 for(i=0;i<1024;i++)
842 {
843 if(p->rfd_top->status)
844 break;
845 DELAY_16();
846 if(i == 1023)
847 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
848 }
849 }
850 #endif
851
852 #if 0
853 if(!at_least_one)
854 {
855 int i;
856 volatile struct rfd_struct *rfds=p->rfd_top;
857 volatile struct rbd_struct *rbds;
858 printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
859 for(i=0;i< (p->num_recv_buffs+4);i++)
860 {
861 rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
862 printk("%04x:%04x ",rfds->status,rbds->status);
863 rfds = (struct rfd_struct *) make32(rfds->next);
864 }
865 printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
866 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);
867 }
868 old_at_least = at_least_one;
869 #endif
870
871 if(debuglevel > 0)
872 printk("r");
873 }
874
875 /**********************************************************
876 * handle 'Receiver went not ready'.
877 */
878
879 static void sun3_82586_rnr_int(struct net_device *dev)
880 {
881 struct priv *p = (struct priv *) dev->priv;
882
883 p->stats.rx_errors++;
884
885 WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
886 p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
887 sun3_attn586();
888 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */
889
890 alloc_rfa(dev,(char *)p->rfd_first);
891 /* maybe add a check here, before restarting the RU */
892 startrecv586(dev); /* restart RU */
893
894 printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
895
896 }
897
898 /**********************************************************
899 * handle xmit - interrupt
900 */
901
902 static void sun3_82586_xmt_int(struct net_device *dev)
903 {
904 int status;
905 struct priv *p = (struct priv *) dev->priv;
906
907 if(debuglevel > 0)
908 printk("X");
909
910 status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status);
911 if(!(status & STAT_COMPL))
912 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
913
914 if(status & STAT_OK)
915 {
916 p->stats.tx_packets++;
917 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
918 }
919 else
920 {
921 p->stats.tx_errors++;
922 if(status & TCMD_LATECOLL) {
923 printk("%s: late collision detected.\n",dev->name);
924 p->stats.collisions++;
925 }
926 else if(status & TCMD_NOCARRIER) {
927 p->stats.tx_carrier_errors++;
928 printk("%s: no carrier detected.\n",dev->name);
929 }
930 else if(status & TCMD_LOSTCTS)
931 printk("%s: loss of CTS detected.\n",dev->name);
932 else if(status & TCMD_UNDERRUN) {
933 p->stats.tx_fifo_errors++;
934 printk("%s: DMA underrun detected.\n",dev->name);
935 }
936 else if(status & TCMD_MAXCOLL) {
937 printk("%s: Max. collisions exceeded.\n",dev->name);
938 p->stats.collisions += 16;
939 }
940 }
941
942 #if (NUM_XMIT_BUFFS > 1)
943 if( (++p->xmit_last) == NUM_XMIT_BUFFS)
944 p->xmit_last = 0;
945 #endif
946 netif_wake_queue(dev);
947 }
948
949 /***********************************************************
950 * (re)start the receiver
951 */
952
953 static void startrecv586(struct net_device *dev)
954 {
955 struct priv *p = (struct priv *) dev->priv;
956
957 WAIT_4_SCB_CMD();
958 WAIT_4_SCB_CMD_RUC();
959 p->scb->rfa_offset = make16(p->rfd_first);
960 p->scb->cmd_ruc = RUC_START;
961 sun3_attn586(); /* start cmd. */
962 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */
963 }
964
965 static void sun3_82586_timeout(struct net_device *dev)
966 {
967 struct priv *p = (struct priv *) dev->priv;
968 #ifndef NO_NOPCOMMANDS
969 if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
970 {
971 netif_wake_queue(dev);
972 #ifdef DEBUG
973 printk("%s: strange ... timeout with CU active?!?\n",dev->name);
974 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);
975 #endif
976 p->scb->cmd_cuc = CUC_ABORT;
977 sun3_attn586();
978 WAIT_4_SCB_CMD();
979 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
980 p->scb->cmd_cuc = CUC_START;
981 sun3_attn586();
982 WAIT_4_SCB_CMD();
983 dev->trans_start = jiffies;
984 return 0;
985 }
986 #endif
987 {
988 #ifdef DEBUG
989 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
990 printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status));
991 printk("%s: check, whether you set the right interrupt number!\n",dev->name);
992 #endif
993 sun3_82586_close(dev);
994 sun3_82586_open(dev);
995 }
996 dev->trans_start = jiffies;
997 }
998
999 /******************************************************
1000 * send frame
1001 */
1002
1003 static int sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev)
1004 {
1005 int len,i;
1006 #ifndef NO_NOPCOMMANDS
1007 int next_nop;
1008 #endif
1009 struct priv *p = (struct priv *) dev->priv;
1010
1011 if(skb->len > XMIT_BUFF_SIZE)
1012 {
1013 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
1014 return 0;
1015 }
1016
1017 netif_stop_queue(dev);
1018
1019 #if(NUM_XMIT_BUFFS > 1)
1020 if(test_and_set_bit(0,(void *) &p->lock)) {
1021 printk("%s: Queue was locked\n",dev->name);
1022 return 1;
1023 }
1024 else
1025 #endif
1026 {
1027 len = skb->len;
1028 if (len < ETH_ZLEN) {
1029 memset((char *)p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
1030 len = ETH_ZLEN;
1031 }
1032 memcpy((char *)p->xmit_cbuffs[p->xmit_count],(char *)(skb->data),skb->len);
1033
1034 #if (NUM_XMIT_BUFFS == 1)
1035 # ifdef NO_NOPCOMMANDS
1036
1037 #ifdef DEBUG
1038 if(p->scb->cus & CU_ACTIVE)
1039 {
1040 printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
1041 printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status));
1042 }
1043 #endif
1044
1045 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1046 for(i=0;i<16;i++)
1047 {
1048 p->xmit_cmds[0]->cmd_status = 0;
1049 WAIT_4_SCB_CMD();
1050 if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
1051 p->scb->cmd_cuc = CUC_RESUME;
1052 else
1053 {
1054 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1055 p->scb->cmd_cuc = CUC_START;
1056 }
1057
1058 sun3_attn586();
1059 dev->trans_start = jiffies;
1060 if(!i)
1061 dev_kfree_skb(skb);
1062 WAIT_4_SCB_CMD();
1063 if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
1064 break;
1065 if(p->xmit_cmds[0]->cmd_status)
1066 break;
1067 if(i==15)
1068 printk("%s: Can't start transmit-command.\n",dev->name);
1069 }
1070 # else
1071 next_nop = (p->nop_point + 1) & 0x1;
1072 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1073
1074 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1075 = make16((p->nop_cmds[next_nop]));
1076 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1077
1078 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1079 dev->trans_start = jiffies;
1080 p->nop_point = next_nop;
1081 dev_kfree_skb(skb);
1082 # endif
1083 #else
1084 p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len);
1085 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
1086 next_nop = 0;
1087
1088 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1089 /* linkpointer of xmit-command already points to next nop cmd */
1090 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
1091 p->nop_cmds[next_nop]->cmd_status = 0;
1092
1093 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1094 dev->trans_start = jiffies;
1095 p->xmit_count = next_nop;
1096
1097 {
1098 unsigned long flags;
1099 local_irq_save(flags);
1100 if(p->xmit_count != p->xmit_last)
1101 netif_wake_queue(dev);
1102 p->lock = 0;
1103 local_irq_restore(flags);
1104 }
1105 dev_kfree_skb(skb);
1106 #endif
1107 }
1108 return 0;
1109 }
1110
1111 /*******************************************
1112 * Someone wanna have the statistics
1113 */
1114
1115 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev)
1116 {
1117 struct priv *p = (struct priv *) dev->priv;
1118 unsigned short crc,aln,rsc,ovrn;
1119
1120 crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */
1121 p->scb->crc_errs = 0;
1122 aln = swab16(p->scb->aln_errs);
1123 p->scb->aln_errs = 0;
1124 rsc = swab16(p->scb->rsc_errs);
1125 p->scb->rsc_errs = 0;
1126 ovrn = swab16(p->scb->ovrn_errs);
1127 p->scb->ovrn_errs = 0;
1128
1129 p->stats.rx_crc_errors += crc;
1130 p->stats.rx_fifo_errors += ovrn;
1131 p->stats.rx_frame_errors += aln;
1132 p->stats.rx_dropped += rsc;
1133
1134 return &p->stats;
1135 }
1136
1137 /********************************************************
1138 * Set MC list ..
1139 */
1140
1141 static void set_multicast_list(struct net_device *dev)
1142 {
1143 netif_stop_queue(dev);
1144 sun3_disint();
1145 alloc586(dev);
1146 init586(dev);
1147 startrecv586(dev);
1148 sun3_enaint();
1149 netif_wake_queue(dev);
1150 }
1151
1152 #ifdef MODULE
1153 #error This code is not currently supported as a module
1154 static struct net_device *dev_sun3_82586;
1155
1156 int init_module(void)
1157 {
1158 dev_sun3_82586 = sun3_82586_probe(-1);
1159 if (IS_ERR(dev_sun3_82586))
1160 return PTR_ERR(dev_sun3_82586);
1161 return 0;
1162 }
1163
1164 void cleanup_module(void)
1165 {
1166 unsigned long ioaddr = dev_sun3_82586->base_addr;
1167 unregister_netdev(dev_sun3_82586);
1168 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
1169 iounmap((void *)ioaddr);
1170 free_netdev(dev_sun3_82586);
1171 }
1172 #endif /* MODULE */
1173
1174 #if 0
1175 /*
1176 * DUMP .. we expect a not running CMD unit and enough space
1177 */
1178 void sun3_82586_dump(struct net_device *dev,void *ptr)
1179 {
1180 struct priv *p = (struct priv *) dev->priv;
1181 struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
1182 int i;
1183
1184 p->scb->cmd_cuc = CUC_ABORT;
1185 sun3_attn586();
1186 WAIT_4_SCB_CMD();
1187 WAIT_4_SCB_CMD_RUC();
1188
1189 dump_cmd->cmd_status = 0;
1190 dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
1191 dump_cmd->dump_offset = make16((dump_cmd + 1));
1192 dump_cmd->cmd_link = 0xffff;
1193
1194 p->scb->cbl_offset = make16(dump_cmd);
1195 p->scb->cmd_cuc = CUC_START;
1196 sun3_attn586();
1197 WAIT_4_STAT_COMPL(dump_cmd);
1198
1199 if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
1200 printk("%s: Can't get dump information.\n",dev->name);
1201
1202 for(i=0;i<170;i++) {
1203 printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);
1204 if(i % 24 == 23)
1205 printk("\n");
1206 }
1207 printk("\n");
1208 }
1209 #endif
1210
1211 MODULE_LICENSE("GPL");
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