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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / net / sun3_82586.c
blob4fb97e870b368b3a13c242ec40aff4a7ed287ab0
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/interrupt.h>
37 #include <linux/delay.h>
38 #include <linux/init.h>
39 #include <linux/bitops.h>
40 #include <asm/io.h>
41 #include <asm/idprom.h>
42 #include <asm/machines.h>
43 #include <asm/sun3mmu.h>
44 #include <asm/dvma.h>
45 #include <asm/byteorder.h>
46
47 #include <linux/netdevice.h>
48 #include <linux/etherdevice.h>
49 #include <linux/skbuff.h>
50
51 #include "sun3_82586.h"
52
53 #define DRV_NAME "sun3_82586"
54
55 #define DEBUG /* debug on */
56 #define SYSBUSVAL 0 /* 16 Bit */
57 #define SUN3_82586_TOTAL_SIZE PAGE_SIZE
58
59 #define sun3_attn586() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_ATTEN; *(volatile unsigned char *)(dev->base_addr) &= ~IEOB_ATTEN;}
60 #define sun3_reset586() {*(volatile unsigned char *)(dev->base_addr) = 0; udelay(100); *(volatile unsigned char *)(dev->base_addr) = IEOB_NORSET;}
61 #define sun3_disint() {*(volatile unsigned char *)(dev->base_addr) &= ~IEOB_IENAB;}
62 #define sun3_enaint() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_IENAB;}
63 #define sun3_active() {*(volatile unsigned char *)(dev->base_addr) |= (IEOB_IENAB|IEOB_ONAIR|IEOB_NORSET);}
64
65 #define make32(ptr16) (p->memtop + (swab16((unsigned short) (ptr16))) )
66 #define make24(ptr32) (char *)swab32(( ((unsigned long) (ptr32)) - p->base))
67 #define make16(ptr32) (swab16((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop )))
68
69 /******************* how to calculate the buffers *****************************
70
71 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
72 * --------------- in a different (more stable?) mode. Only in this mode it's
73 * possible to configure the driver with 'NO_NOPCOMMANDS'
74
75 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
76 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
77 sizeof(rfd) = 24; sizeof(rbd) = 12;
78 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
79 sizeof(nop_cmd) = 8;
80
81 * if you don't know the driver, better do not change these values: */
82
83 #define RECV_BUFF_SIZE 1536 /* slightly oversized */
84 #define XMIT_BUFF_SIZE 1536 /* slightly oversized */
85 #define NUM_XMIT_BUFFS 1 /* config for 32K shmem */
86 #define NUM_RECV_BUFFS_8 4 /* config for 32K shared mem */
87 #define NUM_RECV_BUFFS_16 9 /* config for 32K shared mem */
88 #define NUM_RECV_BUFFS_32 16 /* config for 32K shared mem */
89 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
90
91 /**************************************************************************/
92
93 /* different DELAYs */
94 #define DELAY(x) mdelay(32 * x);
95 #define DELAY_16(); { udelay(16); }
96 #define DELAY_18(); { udelay(4); }
97
98 /* wait for command with timeout: */
99 #define WAIT_4_SCB_CMD() \
100 { int i; \
101 for(i=0;i<16384;i++) { \
102 if(!p->scb->cmd_cuc) break; \
103 DELAY_18(); \
104 if(i == 16383) { \
105 printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \
106 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
107
108 #define WAIT_4_SCB_CMD_RUC() { int i; \
109 for(i=0;i<16384;i++) { \
110 if(!p->scb->cmd_ruc) break; \
111 DELAY_18(); \
112 if(i == 16383) { \
113 printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \
114 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
115
116 #define WAIT_4_STAT_COMPL(addr) { int i; \
117 for(i=0;i<32767;i++) { \
118 if(swab16((addr)->cmd_status) & STAT_COMPL) break; \
119 DELAY_16(); DELAY_16(); } }
120
121 static int sun3_82586_probe1(struct net_device *dev,int ioaddr);
122 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id);
123 static int sun3_82586_open(struct net_device *dev);
124 static int sun3_82586_close(struct net_device *dev);
125 static int sun3_82586_send_packet(struct sk_buff *,struct net_device *);
126 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev);
127 static void set_multicast_list(struct net_device *dev);
128 static void sun3_82586_timeout(struct net_device *dev);
129
130 /* helper-functions */
131 static int init586(struct net_device *dev);
132 static int check586(struct net_device *dev,char *where,unsigned size);
133 static void alloc586(struct net_device *dev);
134 static void startrecv586(struct net_device *dev);
135 static void *alloc_rfa(struct net_device *dev,void *ptr);
136 static void sun3_82586_rcv_int(struct net_device *dev);
137 static void sun3_82586_xmt_int(struct net_device *dev);
138 static void sun3_82586_rnr_int(struct net_device *dev);
139
140 struct priv
141 {
142 unsigned long base;
143 char *memtop;
144 long int lock;
145 int reseted;
146 volatile struct rfd_struct *rfd_last,*rfd_top,*rfd_first;
147 volatile struct scp_struct *scp; /* volatile is important */
148 volatile struct iscp_struct *iscp; /* volatile is important */
149 volatile struct scb_struct *scb; /* volatile is important */
150 volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
151 volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
152 #if (NUM_XMIT_BUFFS == 1)
153 volatile struct nop_cmd_struct *nop_cmds[2];
154 #else
155 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
156 #endif
157 volatile int nop_point,num_recv_buffs;
158 volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
159 volatile int xmit_count,xmit_last;
160 };
161
162 /**********************************************
163 * close device
164 */
165 static int sun3_82586_close(struct net_device *dev)
166 {
167 free_irq(dev->irq, dev);
168
169 sun3_reset586(); /* the hard way to stop the receiver */
170
171 netif_stop_queue(dev);
172
173 return 0;
174 }
175
176 /**********************************************
177 * open device
178 */
179 static int sun3_82586_open(struct net_device *dev)
180 {
181 int ret;
182
183 sun3_disint();
184 alloc586(dev);
185 init586(dev);
186 startrecv586(dev);
187 sun3_enaint();
188
189 ret = request_irq(dev->irq, sun3_82586_interrupt,0,dev->name,dev);
190 if (ret)
191 {
192 sun3_reset586();
193 return ret;
194 }
195
196 netif_start_queue(dev);
197
198 return 0; /* most done by init */
199 }
200
201 /**********************************************
202 * Check to see if there's an 82586 out there.
203 */
204 static int check586(struct net_device *dev,char *where,unsigned size)
205 {
206 struct priv pb;
207 struct priv *p = &pb;
208 char *iscp_addr;
209 int i;
210
211 p->base = (unsigned long) dvma_btov(0);
212 p->memtop = (char *)dvma_btov((unsigned long)where);
213 p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
214 memset((char *)p->scp,0, sizeof(struct scp_struct));
215 for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */
216 if(((char *)p->scp)[i])
217 return 0;
218 p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */
219 if(p->scp->sysbus != SYSBUSVAL)
220 return 0;
221
222 iscp_addr = (char *)dvma_btov((unsigned long)where);
223
224 p->iscp = (struct iscp_struct *) iscp_addr;
225 memset((char *)p->iscp,0, sizeof(struct iscp_struct));
226
227 p->scp->iscp = make24(p->iscp);
228 p->iscp->busy = 1;
229
230 sun3_reset586();
231 sun3_attn586();
232 DELAY(1); /* wait a while... */
233
234 if(p->iscp->busy) /* i82586 clears 'busy' after successful init */
235 return 0;
236
237 return 1;
238 }
239
240 /******************************************************************
241 * set iscp at the right place, called by sun3_82586_probe1 and open586.
242 */
243 static void alloc586(struct net_device *dev)
244 {
245 struct priv *p = netdev_priv(dev);
246
247 sun3_reset586();
248 DELAY(1);
249
250 p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
251 p->iscp = (struct iscp_struct *) dvma_btov(dev->mem_start);
252 p->scb = (struct scb_struct *) ((char *)p->iscp + sizeof(struct iscp_struct));
253
254 memset((char *) p->iscp,0,sizeof(struct iscp_struct));
255 memset((char *) p->scp ,0,sizeof(struct scp_struct));
256
257 p->scp->iscp = make24(p->iscp);
258 p->scp->sysbus = SYSBUSVAL;
259 p->iscp->scb_offset = make16(p->scb);
260 p->iscp->scb_base = make24(dvma_btov(dev->mem_start));
261
262 p->iscp->busy = 1;
263 sun3_reset586();
264 sun3_attn586();
265
266 DELAY(1);
267
268 if(p->iscp->busy)
269 printk("%s: Init-Problems (alloc).\n",dev->name);
270
271 p->reseted = 0;
272
273 memset((char *)p->scb,0,sizeof(struct scb_struct));
274 }
275
276 struct net_device * __init sun3_82586_probe(int unit)
277 {
278 struct net_device *dev;
279 unsigned long ioaddr;
280 static int found = 0;
281 int err = -ENOMEM;
282
283 /* check that this machine has an onboard 82586 */
284 switch(idprom->id_machtype) {
285 case SM_SUN3|SM_3_160:
286 case SM_SUN3|SM_3_260:
287 /* these machines have 82586 */
288 break;
289
290 default:
291 return ERR_PTR(-ENODEV);
292 }
293
294 if (found)
295 return ERR_PTR(-ENODEV);
296
297 ioaddr = (unsigned long)ioremap(IE_OBIO, SUN3_82586_TOTAL_SIZE);
298 if (!ioaddr)
299 return ERR_PTR(-ENOMEM);
300 found = 1;
301
302 dev = alloc_etherdev(sizeof(struct priv));
303 if (!dev)
304 goto out;
305 if (unit >= 0) {
306 sprintf(dev->name, "eth%d", unit);
307 netdev_boot_setup_check(dev);
308 }
309
310 dev->irq = IE_IRQ;
311 dev->base_addr = ioaddr;
312 err = sun3_82586_probe1(dev, ioaddr);
313 if (err)
314 goto out1;
315 err = register_netdev(dev);
316 if (err)
317 goto out2;
318 return dev;
319
320 out2:
321 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
322 out1:
323 free_netdev(dev);
324 out:
325 iounmap((void __iomem *)ioaddr);
326 return ERR_PTR(err);
327 }
328
329 static const struct net_device_ops sun3_82586_netdev_ops = {
330 .ndo_open = sun3_82586_open,
331 .ndo_stop = sun3_82586_close,
332 .ndo_start_xmit = sun3_82586_send_packet,
333 .ndo_set_multicast_list = set_multicast_list,
334 .ndo_tx_timeout = sun3_82586_timeout,
335 .ndo_get_stats = sun3_82586_get_stats,
336 .ndo_validate_addr = eth_validate_addr,
337 .ndo_set_mac_address = eth_mac_addr,
338 .ndo_change_mtu = eth_change_mtu,
339 };
340
341 static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr)
342 {
343 int i, size, retval;
344
345 if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME))
346 return -EBUSY;
347
348 /* copy in the ethernet address from the prom */
349 for(i = 0; i < 6 ; i++)
350 dev->dev_addr[i] = idprom->id_ethaddr[i];
351
352 printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr);
353
354 /*
355 * check (or search) IO-Memory, 32K
356 */
357 size = 0x8000;
358
359 dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000);
360 dev->mem_end = dev->mem_start + size;
361
362 if(size != 0x2000 && size != 0x4000 && size != 0x8000) {
363 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size);
364 retval = -ENODEV;
365 goto out;
366 }
367 if(!check586(dev,(char *) dev->mem_start,size)) {
368 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
369 retval = -ENODEV;
370 goto out;
371 }
372
373 ((struct priv *)netdev_priv(dev))->memtop =
374 (char *)dvma_btov(dev->mem_start);
375 ((struct priv *)netdev_priv(dev))->base = (unsigned long) dvma_btov(0);
376 alloc586(dev);
377
378 /* set number of receive-buffs according to memsize */
379 if(size == 0x2000)
380 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
381 NUM_RECV_BUFFS_8;
382 else if(size == 0x4000)
383 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
384 NUM_RECV_BUFFS_16;
385 else
386 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
387 NUM_RECV_BUFFS_32;
388
389 printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq);
390
391 dev->netdev_ops = &sun3_82586_netdev_ops;
392 dev->watchdog_timeo = HZ/20;
393
394 dev->if_port = 0;
395 return 0;
396 out:
397 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
398 return retval;
399 }
400
401
402 static int init586(struct net_device *dev)
403 {
404 void *ptr;
405 int i,result=0;
406 struct priv *p = netdev_priv(dev);
407 volatile struct configure_cmd_struct *cfg_cmd;
408 volatile struct iasetup_cmd_struct *ias_cmd;
409 volatile struct tdr_cmd_struct *tdr_cmd;
410 volatile struct mcsetup_cmd_struct *mc_cmd;
411 struct netdev_hw_addr *ha;
412 int num_addrs=netdev_mc_count(dev);
413
414 ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
415
416 cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
417 cfg_cmd->cmd_status = 0;
418 cfg_cmd->cmd_cmd = swab16(CMD_CONFIGURE | CMD_LAST);
419 cfg_cmd->cmd_link = 0xffff;
420
421 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
422 cfg_cmd->fifo = fifo; /* fifo-limit (8=tx:32/rx:64) */
423 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
424 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
425 cfg_cmd->priority = 0x00;
426 cfg_cmd->ifs = 0x60;
427 cfg_cmd->time_low = 0x00;
428 cfg_cmd->time_high = 0xf2;
429 cfg_cmd->promisc = 0;
430 if(dev->flags & IFF_ALLMULTI) {
431 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
432 if(num_addrs > len) {
433 printk("%s: switching to promisc. mode\n",dev->name);
434 cfg_cmd->promisc = 1;
435 }
436 }
437 if(dev->flags&IFF_PROMISC)
438 cfg_cmd->promisc = 1;
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 i = 0;
535 netdev_for_each_mc_addr(ha, dev)
536 memcpy((char *) mc_cmd->mc_list[i++],
537 ha->addr, ETH_ALEN);
538
539 p->scb->cbl_offset = make16(mc_cmd);
540 p->scb->cmd_cuc = CUC_START;
541 sun3_attn586();
542
543 WAIT_4_STAT_COMPL(mc_cmd);
544
545 if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
546 printk("%s: Can't apply multicast-address-list.\n",dev->name);
547 }
548
549 /*
550 * alloc nop/xmit-cmds
551 */
552 #if (NUM_XMIT_BUFFS == 1)
553 for(i=0;i<2;i++)
554 {
555 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
556 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
557 p->nop_cmds[i]->cmd_status = 0;
558 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
559 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
560 }
561 #else
562 for(i=0;i<NUM_XMIT_BUFFS;i++)
563 {
564 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
565 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
566 p->nop_cmds[i]->cmd_status = 0;
567 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
568 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
569 }
570 #endif
571
572 ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */
573
574 /*
575 * alloc xmit-buffs / init xmit_cmds
576 */
577 for(i=0;i<NUM_XMIT_BUFFS;i++)
578 {
579 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
580 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
581 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
582 ptr = (char *) ptr + XMIT_BUFF_SIZE;
583 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
584 ptr = (char *) ptr + sizeof(struct tbd_struct);
585 if((void *)ptr > (void *)dev->mem_end)
586 {
587 printk("%s: not enough shared-mem for your configuration!\n",dev->name);
588 return 1;
589 }
590 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
591 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
592 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
593 p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL);
594 p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT);
595 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
596 p->xmit_buffs[i]->next = 0xffff;
597 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
598 }
599
600 p->xmit_count = 0;
601 p->xmit_last = 0;
602 #ifndef NO_NOPCOMMANDS
603 p->nop_point = 0;
604 #endif
605
606 /*
607 * 'start transmitter'
608 */
609 #ifndef NO_NOPCOMMANDS
610 p->scb->cbl_offset = make16(p->nop_cmds[0]);
611 p->scb->cmd_cuc = CUC_START;
612 sun3_attn586();
613 WAIT_4_SCB_CMD();
614 #else
615 p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
616 p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT);
617 #endif
618
619 /*
620 * ack. interrupts
621 */
622 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
623 sun3_attn586();
624 DELAY_16();
625
626 sun3_enaint();
627 sun3_active();
628
629 return 0;
630 }
631
632 /******************************************************
633 * This is a helper routine for sun3_82586_rnr_int() and init586().
634 * It sets up the Receive Frame Area (RFA).
635 */
636
637 static void *alloc_rfa(struct net_device *dev,void *ptr)
638 {
639 volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
640 volatile struct rbd_struct *rbd;
641 int i;
642 struct priv *p = netdev_priv(dev);
643
644 memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
645 p->rfd_first = rfd;
646
647 for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
648 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
649 rfd[i].rbd_offset = 0xffff;
650 }
651 rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */
652
653 ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
654
655 rbd = (struct rbd_struct *) ptr;
656 ptr = (void *) (rbd + p->num_recv_buffs);
657
658 /* clr descriptors */
659 memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
660
661 for(i=0;i<p->num_recv_buffs;i++)
662 {
663 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
664 rbd[i].size = swab16(RECV_BUFF_SIZE);
665 rbd[i].buffer = make24(ptr);
666 ptr = (char *) ptr + RECV_BUFF_SIZE;
667 }
668
669 p->rfd_top = p->rfd_first;
670 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
671
672 p->scb->rfa_offset = make16(p->rfd_first);
673 p->rfd_first->rbd_offset = make16(rbd);
674
675 return ptr;
676 }
677
678
679 /**************************************************
680 * Interrupt Handler ...
681 */
682
683 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id)
684 {
685 struct net_device *dev = dev_id;
686 unsigned short stat;
687 int cnt=0;
688 struct priv *p;
689
690 if (!dev) {
691 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq);
692 return IRQ_NONE;
693 }
694 p = netdev_priv(dev);
695
696 if(debuglevel > 1)
697 printk("I");
698
699 WAIT_4_SCB_CMD(); /* wait for last command */
700
701 while((stat=p->scb->cus & STAT_MASK))
702 {
703 p->scb->cmd_cuc = stat;
704 sun3_attn586();
705
706 if(stat & STAT_FR) /* received a frame */
707 sun3_82586_rcv_int(dev);
708
709 if(stat & STAT_RNR) /* RU went 'not ready' */
710 {
711 printk("(R)");
712 if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
713 {
714 WAIT_4_SCB_CMD();
715 p->scb->cmd_ruc = RUC_RESUME;
716 sun3_attn586();
717 WAIT_4_SCB_CMD_RUC();
718 }
719 else
720 {
721 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
722 sun3_82586_rnr_int(dev);
723 }
724 }
725
726 if(stat & STAT_CX) /* command with I-bit set complete */
727 sun3_82586_xmt_int(dev);
728
729 #ifndef NO_NOPCOMMANDS
730 if(stat & STAT_CNA) /* CU went 'not ready' */
731 {
732 if(netif_running(dev))
733 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
734 }
735 #endif
736
737 if(debuglevel > 1)
738 printk("%d",cnt++);
739
740 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */
741 if(p->scb->cmd_cuc) /* timed out? */
742 {
743 printk("%s: Acknowledge timed out.\n",dev->name);
744 sun3_disint();
745 break;
746 }
747 }
748
749 if(debuglevel > 1)
750 printk("i");
751 return IRQ_HANDLED;
752 }
753
754 /*******************************************************
755 * receive-interrupt
756 */
757
758 static void sun3_82586_rcv_int(struct net_device *dev)
759 {
760 int status,cnt=0;
761 unsigned short totlen;
762 struct sk_buff *skb;
763 struct rbd_struct *rbd;
764 struct priv *p = netdev_priv(dev);
765
766 if(debuglevel > 0)
767 printk("R");
768
769 for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
770 {
771 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
772
773 if(status & RFD_OK) /* frame received without error? */
774 {
775 if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */
776 {
777 totlen &= RBD_MASK; /* length of this frame */
778 rbd->status = 0;
779 skb = (struct sk_buff *) dev_alloc_skb(totlen+2);
780 if(skb != NULL)
781 {
782 skb_reserve(skb,2);
783 skb_put(skb,totlen);
784 skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen);
785 skb->protocol=eth_type_trans(skb,dev);
786 netif_rx(skb);
787 dev->stats.rx_packets++;
788 }
789 else
790 dev->stats.rx_dropped++;
791 }
792 else
793 {
794 int rstat;
795 /* free all RBD's until RBD_LAST is set */
796 totlen = 0;
797 while(!((rstat=swab16(rbd->status)) & RBD_LAST))
798 {
799 totlen += rstat & RBD_MASK;
800 if(!rstat)
801 {
802 printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
803 break;
804 }
805 rbd->status = 0;
806 rbd = (struct rbd_struct *) make32(rbd->next);
807 }
808 totlen += rstat & RBD_MASK;
809 rbd->status = 0;
810 printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
811 dev->stats.rx_dropped++;
812 }
813 }
814 else /* frame !(ok), only with 'save-bad-frames' */
815 {
816 printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
817 dev->stats.rx_errors++;
818 }
819 p->rfd_top->stat_high = 0;
820 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
821 p->rfd_top->rbd_offset = 0xffff;
822 p->rfd_last->last = 0; /* delete RFD_SUSP */
823 p->rfd_last = p->rfd_top;
824 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
825 p->scb->rfa_offset = make16(p->rfd_top);
826
827 if(debuglevel > 0)
828 printk("%d",cnt++);
829 }
830
831 if(automatic_resume)
832 {
833 WAIT_4_SCB_CMD();
834 p->scb->cmd_ruc = RUC_RESUME;
835 sun3_attn586();
836 WAIT_4_SCB_CMD_RUC();
837 }
838
839 #ifdef WAIT_4_BUSY
840 {
841 int i;
842 for(i=0;i<1024;i++)
843 {
844 if(p->rfd_top->status)
845 break;
846 DELAY_16();
847 if(i == 1023)
848 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
849 }
850 }
851 #endif
852
853
854 if(debuglevel > 0)
855 printk("r");
856 }
857
858 /**********************************************************
859 * handle 'Receiver went not ready'.
860 */
861
862 static void sun3_82586_rnr_int(struct net_device *dev)
863 {
864 struct priv *p = netdev_priv(dev);
865
866 dev->stats.rx_errors++;
867
868 WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
869 p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
870 sun3_attn586();
871 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */
872
873 alloc_rfa(dev,(char *)p->rfd_first);
874 /* maybe add a check here, before restarting the RU */
875 startrecv586(dev); /* restart RU */
876
877 printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
878
879 }
880
881 /**********************************************************
882 * handle xmit - interrupt
883 */
884
885 static void sun3_82586_xmt_int(struct net_device *dev)
886 {
887 int status;
888 struct priv *p = netdev_priv(dev);
889
890 if(debuglevel > 0)
891 printk("X");
892
893 status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status);
894 if(!(status & STAT_COMPL))
895 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
896
897 if(status & STAT_OK)
898 {
899 dev->stats.tx_packets++;
900 dev->stats.collisions += (status & TCMD_MAXCOLLMASK);
901 }
902 else
903 {
904 dev->stats.tx_errors++;
905 if(status & TCMD_LATECOLL) {
906 printk("%s: late collision detected.\n",dev->name);
907 dev->stats.collisions++;
908 }
909 else if(status & TCMD_NOCARRIER) {
910 dev->stats.tx_carrier_errors++;
911 printk("%s: no carrier detected.\n",dev->name);
912 }
913 else if(status & TCMD_LOSTCTS)
914 printk("%s: loss of CTS detected.\n",dev->name);
915 else if(status & TCMD_UNDERRUN) {
916 dev->stats.tx_fifo_errors++;
917 printk("%s: DMA underrun detected.\n",dev->name);
918 }
919 else if(status & TCMD_MAXCOLL) {
920 printk("%s: Max. collisions exceeded.\n",dev->name);
921 dev->stats.collisions += 16;
922 }
923 }
924
925 #if (NUM_XMIT_BUFFS > 1)
926 if( (++p->xmit_last) == NUM_XMIT_BUFFS)
927 p->xmit_last = 0;
928 #endif
929 netif_wake_queue(dev);
930 }
931
932 /***********************************************************
933 * (re)start the receiver
934 */
935
936 static void startrecv586(struct net_device *dev)
937 {
938 struct priv *p = netdev_priv(dev);
939
940 WAIT_4_SCB_CMD();
941 WAIT_4_SCB_CMD_RUC();
942 p->scb->rfa_offset = make16(p->rfd_first);
943 p->scb->cmd_ruc = RUC_START;
944 sun3_attn586(); /* start cmd. */
945 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */
946 }
947
948 static void sun3_82586_timeout(struct net_device *dev)
949 {
950 struct priv *p = netdev_priv(dev);
951 #ifndef NO_NOPCOMMANDS
952 if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
953 {
954 netif_wake_queue(dev);
955 #ifdef DEBUG
956 printk("%s: strange ... timeout with CU active?!?\n",dev->name);
957 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);
958 #endif
959 p->scb->cmd_cuc = CUC_ABORT;
960 sun3_attn586();
961 WAIT_4_SCB_CMD();
962 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
963 p->scb->cmd_cuc = CUC_START;
964 sun3_attn586();
965 WAIT_4_SCB_CMD();
966 dev->trans_start = jiffies; /* prevent tx timeout */
967 return 0;
968 }
969 #endif
970 {
971 #ifdef DEBUG
972 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
973 printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status));
974 printk("%s: check, whether you set the right interrupt number!\n",dev->name);
975 #endif
976 sun3_82586_close(dev);
977 sun3_82586_open(dev);
978 }
979 dev->trans_start = jiffies; /* prevent tx timeout */
980 }
981
982 /******************************************************
983 * send frame
984 */
985
986 static int sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev)
987 {
988 int len,i;
989 #ifndef NO_NOPCOMMANDS
990 int next_nop;
991 #endif
992 struct priv *p = netdev_priv(dev);
993
994 if(skb->len > XMIT_BUFF_SIZE)
995 {
996 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
997 return NETDEV_TX_OK;
998 }
999
1000 netif_stop_queue(dev);
1001
1002 #if(NUM_XMIT_BUFFS > 1)
1003 if(test_and_set_bit(0,(void *) &p->lock)) {
1004 printk("%s: Queue was locked\n",dev->name);
1005 return NETDEV_TX_BUSY;
1006 }
1007 else
1008 #endif
1009 {
1010 len = skb->len;
1011 if (len < ETH_ZLEN) {
1012 memset((void *)p->xmit_cbuffs[p->xmit_count], 0,
1013 ETH_ZLEN);
1014 len = ETH_ZLEN;
1015 }
1016 skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len);
1017
1018 #if (NUM_XMIT_BUFFS == 1)
1019 # ifdef NO_NOPCOMMANDS
1020
1021 #ifdef DEBUG
1022 if(p->scb->cus & CU_ACTIVE)
1023 {
1024 printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
1025 printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status));
1026 }
1027 #endif
1028
1029 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1030 for(i=0;i<16;i++)
1031 {
1032 p->xmit_cmds[0]->cmd_status = 0;
1033 WAIT_4_SCB_CMD();
1034 if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
1035 p->scb->cmd_cuc = CUC_RESUME;
1036 else
1037 {
1038 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1039 p->scb->cmd_cuc = CUC_START;
1040 }
1041
1042 sun3_attn586();
1043 if(!i)
1044 dev_kfree_skb(skb);
1045 WAIT_4_SCB_CMD();
1046 if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
1047 break;
1048 if(p->xmit_cmds[0]->cmd_status)
1049 break;
1050 if(i==15)
1051 printk("%s: Can't start transmit-command.\n",dev->name);
1052 }
1053 # else
1054 next_nop = (p->nop_point + 1) & 0x1;
1055 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1056
1057 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1058 = make16((p->nop_cmds[next_nop]));
1059 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1060
1061 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1062 p->nop_point = next_nop;
1063 dev_kfree_skb(skb);
1064 # endif
1065 #else
1066 p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len);
1067 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
1068 next_nop = 0;
1069
1070 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1071 /* linkpointer of xmit-command already points to next nop cmd */
1072 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
1073 p->nop_cmds[next_nop]->cmd_status = 0;
1074
1075 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1076 p->xmit_count = next_nop;
1077
1078 {
1079 unsigned long flags;
1080 local_irq_save(flags);
1081 if(p->xmit_count != p->xmit_last)
1082 netif_wake_queue(dev);
1083 p->lock = 0;
1084 local_irq_restore(flags);
1085 }
1086 dev_kfree_skb(skb);
1087 #endif
1088 }
1089 return NETDEV_TX_OK;
1090 }
1091
1092 /*******************************************
1093 * Someone wanna have the statistics
1094 */
1095
1096 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev)
1097 {
1098 struct priv *p = netdev_priv(dev);
1099 unsigned short crc,aln,rsc,ovrn;
1100
1101 crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */
1102 p->scb->crc_errs = 0;
1103 aln = swab16(p->scb->aln_errs);
1104 p->scb->aln_errs = 0;
1105 rsc = swab16(p->scb->rsc_errs);
1106 p->scb->rsc_errs = 0;
1107 ovrn = swab16(p->scb->ovrn_errs);
1108 p->scb->ovrn_errs = 0;
1109
1110 dev->stats.rx_crc_errors += crc;
1111 dev->stats.rx_fifo_errors += ovrn;
1112 dev->stats.rx_frame_errors += aln;
1113 dev->stats.rx_dropped += rsc;
1114
1115 return &dev->stats;
1116 }
1117
1118 /********************************************************
1119 * Set MC list ..
1120 */
1121
1122 static void set_multicast_list(struct net_device *dev)
1123 {
1124 netif_stop_queue(dev);
1125 sun3_disint();
1126 alloc586(dev);
1127 init586(dev);
1128 startrecv586(dev);
1129 sun3_enaint();
1130 netif_wake_queue(dev);
1131 }
1132
1133 #ifdef MODULE
1134 #error This code is not currently supported as a module
1135 static struct net_device *dev_sun3_82586;
1136
1137 int init_module(void)
1138 {
1139 dev_sun3_82586 = sun3_82586_probe(-1);
1140 if (IS_ERR(dev_sun3_82586))
1141 return PTR_ERR(dev_sun3_82586);
1142 return 0;
1143 }
1144
1145 void cleanup_module(void)
1146 {
1147 unsigned long ioaddr = dev_sun3_82586->base_addr;
1148 unregister_netdev(dev_sun3_82586);
1149 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
1150 iounmap((void *)ioaddr);
1151 free_netdev(dev_sun3_82586);
1152 }
1153 #endif /* MODULE */
1154
1155
1156 MODULE_LICENSE("GPL");
Tomato firmware and modifications.