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Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[linux-2.6/mini2440.git] / drivers / net / sun3_82586.c
bloba39c0b9ba8b6e57fa3f0efc279eff04e3f6a1e17
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 = &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 = netdev_priv(dev);
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 const struct net_device_ops sun3_82586_netdev_ops = {
335 .ndo_open = sun3_82586_open,
336 .ndo_stop = sun3_82586_close,
337 .ndo_start_xmit = sun3_82586_send_packet,
338 .ndo_set_multicast_list = set_multicast_list,
339 .ndo_tx_timeout = sun3_82586_timeout,
340 .ndo_get_stats = sun3_82586_get_stats,
341 .ndo_validate_addr = eth_validate_addr,
342 .ndo_set_mac_address = eth_mac_addr,
343 .ndo_change_mtu = eth_change_mtu,
344 };
345
346 static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr)
347 {
348 int i, size, retval;
349
350 if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME))
351 return -EBUSY;
352
353 /* copy in the ethernet address from the prom */
354 for(i = 0; i < 6 ; i++)
355 dev->dev_addr[i] = idprom->id_ethaddr[i];
356
357 printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr);
358
359 /*
360 * check (or search) IO-Memory, 32K
361 */
362 size = 0x8000;
363
364 dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000);
365 dev->mem_end = dev->mem_start + size;
366
367 if(size != 0x2000 && size != 0x4000 && size != 0x8000) {
368 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size);
369 retval = -ENODEV;
370 goto out;
371 }
372 if(!check586(dev,(char *) dev->mem_start,size)) {
373 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
374 retval = -ENODEV;
375 goto out;
376 }
377
378 ((struct priv *)netdev_priv(dev))->memtop =
379 (char *)dvma_btov(dev->mem_start);
380 ((struct priv *)netdev_priv(dev))->base = (unsigned long) dvma_btov(0);
381 alloc586(dev);
382
383 /* set number of receive-buffs according to memsize */
384 if(size == 0x2000)
385 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
386 NUM_RECV_BUFFS_8;
387 else if(size == 0x4000)
388 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
389 NUM_RECV_BUFFS_16;
390 else
391 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
392 NUM_RECV_BUFFS_32;
393
394 printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq);
395
396 dev->netdev_ops = &sun3_82586_netdev_ops;
397 dev->watchdog_timeo = HZ/20;
398
399 dev->if_port = 0;
400 return 0;
401 out:
402 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
403 return retval;
404 }
405
406
407 static int init586(struct net_device *dev)
408 {
409 void *ptr;
410 int i,result=0;
411 struct priv *p = netdev_priv(dev);
412 volatile struct configure_cmd_struct *cfg_cmd;
413 volatile struct iasetup_cmd_struct *ias_cmd;
414 volatile struct tdr_cmd_struct *tdr_cmd;
415 volatile struct mcsetup_cmd_struct *mc_cmd;
416 struct dev_mc_list *dmi=dev->mc_list;
417 int num_addrs=dev->mc_count;
418
419 ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
420
421 cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
422 cfg_cmd->cmd_status = 0;
423 cfg_cmd->cmd_cmd = swab16(CMD_CONFIGURE | CMD_LAST);
424 cfg_cmd->cmd_link = 0xffff;
425
426 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
427 cfg_cmd->fifo = fifo; /* fifo-limit (8=tx:32/rx:64) */
428 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
429 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
430 cfg_cmd->priority = 0x00;
431 cfg_cmd->ifs = 0x60;
432 cfg_cmd->time_low = 0x00;
433 cfg_cmd->time_high = 0xf2;
434 cfg_cmd->promisc = 0;
435 if(dev->flags & IFF_ALLMULTI) {
436 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
437 if(num_addrs > len) {
438 printk("%s: switching to promisc. mode\n",dev->name);
439 cfg_cmd->promisc = 1;
440 }
441 }
442 if(dev->flags&IFF_PROMISC)
443 cfg_cmd->promisc = 1;
444 cfg_cmd->carr_coll = 0x00;
445
446 p->scb->cbl_offset = make16(cfg_cmd);
447 p->scb->cmd_ruc = 0;
448
449 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
450 sun3_attn586();
451
452 WAIT_4_STAT_COMPL(cfg_cmd);
453
454 if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))
455 {
456 printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status));
457 return 1;
458 }
459
460 /*
461 * individual address setup
462 */
463
464 ias_cmd = (struct iasetup_cmd_struct *)ptr;
465
466 ias_cmd->cmd_status = 0;
467 ias_cmd->cmd_cmd = swab16(CMD_IASETUP | CMD_LAST);
468 ias_cmd->cmd_link = 0xffff;
469
470 memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN);
471
472 p->scb->cbl_offset = make16(ias_cmd);
473
474 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
475 sun3_attn586();
476
477 WAIT_4_STAT_COMPL(ias_cmd);
478
479 if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {
480 printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status));
481 return 1;
482 }
483
484 /*
485 * TDR, wire check .. e.g. no resistor e.t.c
486 */
487
488 tdr_cmd = (struct tdr_cmd_struct *)ptr;
489
490 tdr_cmd->cmd_status = 0;
491 tdr_cmd->cmd_cmd = swab16(CMD_TDR | CMD_LAST);
492 tdr_cmd->cmd_link = 0xffff;
493 tdr_cmd->status = 0;
494
495 p->scb->cbl_offset = make16(tdr_cmd);
496 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
497 sun3_attn586();
498
499 WAIT_4_STAT_COMPL(tdr_cmd);
500
501 if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL))
502 {
503 printk("%s: Problems while running the TDR.\n",dev->name);
504 }
505 else
506 {
507 DELAY_16(); /* wait for result */
508 result = swab16(tdr_cmd->status);
509
510 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
511 sun3_attn586(); /* ack the interrupts */
512
513 if(result & TDR_LNK_OK)
514 ;
515 else if(result & TDR_XCVR_PRB)
516 printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);
517 else if(result & TDR_ET_OPN)
518 printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
519 else if(result & TDR_ET_SRT)
520 {
521 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
522 printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
523 }
524 else
525 printk("%s: TDR: Unknown status %04x\n",dev->name,result);
526 }
527
528 /*
529 * Multicast setup
530 */
531 if(num_addrs && !(dev->flags & IFF_PROMISC) )
532 {
533 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
534 mc_cmd->cmd_status = 0;
535 mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST);
536 mc_cmd->cmd_link = 0xffff;
537 mc_cmd->mc_cnt = swab16(num_addrs * 6);
538
539 for(i=0;i<num_addrs;i++,dmi=dmi->next)
540 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr,6);
541
542 p->scb->cbl_offset = make16(mc_cmd);
543 p->scb->cmd_cuc = CUC_START;
544 sun3_attn586();
545
546 WAIT_4_STAT_COMPL(mc_cmd);
547
548 if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
549 printk("%s: Can't apply multicast-address-list.\n",dev->name);
550 }
551
552 /*
553 * alloc nop/xmit-cmds
554 */
555 #if (NUM_XMIT_BUFFS == 1)
556 for(i=0;i<2;i++)
557 {
558 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
559 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
560 p->nop_cmds[i]->cmd_status = 0;
561 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
562 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
563 }
564 #else
565 for(i=0;i<NUM_XMIT_BUFFS;i++)
566 {
567 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
568 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
569 p->nop_cmds[i]->cmd_status = 0;
570 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
571 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
572 }
573 #endif
574
575 ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */
576
577 /*
578 * alloc xmit-buffs / init xmit_cmds
579 */
580 for(i=0;i<NUM_XMIT_BUFFS;i++)
581 {
582 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
583 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
584 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
585 ptr = (char *) ptr + XMIT_BUFF_SIZE;
586 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
587 ptr = (char *) ptr + sizeof(struct tbd_struct);
588 if((void *)ptr > (void *)dev->mem_end)
589 {
590 printk("%s: not enough shared-mem for your configuration!\n",dev->name);
591 return 1;
592 }
593 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
594 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
595 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
596 p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL);
597 p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT);
598 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
599 p->xmit_buffs[i]->next = 0xffff;
600 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
601 }
602
603 p->xmit_count = 0;
604 p->xmit_last = 0;
605 #ifndef NO_NOPCOMMANDS
606 p->nop_point = 0;
607 #endif
608
609 /*
610 * 'start transmitter'
611 */
612 #ifndef NO_NOPCOMMANDS
613 p->scb->cbl_offset = make16(p->nop_cmds[0]);
614 p->scb->cmd_cuc = CUC_START;
615 sun3_attn586();
616 WAIT_4_SCB_CMD();
617 #else
618 p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
619 p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT);
620 #endif
621
622 /*
623 * ack. interrupts
624 */
625 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
626 sun3_attn586();
627 DELAY_16();
628
629 sun3_enaint();
630 sun3_active();
631
632 return 0;
633 }
634
635 /******************************************************
636 * This is a helper routine for sun3_82586_rnr_int() and init586().
637 * It sets up the Receive Frame Area (RFA).
638 */
639
640 static void *alloc_rfa(struct net_device *dev,void *ptr)
641 {
642 volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
643 volatile struct rbd_struct *rbd;
644 int i;
645 struct priv *p = netdev_priv(dev);
646
647 memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
648 p->rfd_first = rfd;
649
650 for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
651 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
652 rfd[i].rbd_offset = 0xffff;
653 }
654 rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */
655
656 ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
657
658 rbd = (struct rbd_struct *) ptr;
659 ptr = (void *) (rbd + p->num_recv_buffs);
660
661 /* clr descriptors */
662 memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
663
664 for(i=0;i<p->num_recv_buffs;i++)
665 {
666 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
667 rbd[i].size = swab16(RECV_BUFF_SIZE);
668 rbd[i].buffer = make24(ptr);
669 ptr = (char *) ptr + RECV_BUFF_SIZE;
670 }
671
672 p->rfd_top = p->rfd_first;
673 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
674
675 p->scb->rfa_offset = make16(p->rfd_first);
676 p->rfd_first->rbd_offset = make16(rbd);
677
678 return ptr;
679 }
680
681
682 /**************************************************
683 * Interrupt Handler ...
684 */
685
686 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id)
687 {
688 struct net_device *dev = dev_id;
689 unsigned short stat;
690 int cnt=0;
691 struct priv *p;
692
693 if (!dev) {
694 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq);
695 return IRQ_NONE;
696 }
697 p = netdev_priv(dev);
698
699 if(debuglevel > 1)
700 printk("I");
701
702 WAIT_4_SCB_CMD(); /* wait for last command */
703
704 while((stat=p->scb->cus & STAT_MASK))
705 {
706 p->scb->cmd_cuc = stat;
707 sun3_attn586();
708
709 if(stat & STAT_FR) /* received a frame */
710 sun3_82586_rcv_int(dev);
711
712 if(stat & STAT_RNR) /* RU went 'not ready' */
713 {
714 printk("(R)");
715 if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
716 {
717 WAIT_4_SCB_CMD();
718 p->scb->cmd_ruc = RUC_RESUME;
719 sun3_attn586();
720 WAIT_4_SCB_CMD_RUC();
721 }
722 else
723 {
724 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
725 sun3_82586_rnr_int(dev);
726 }
727 }
728
729 if(stat & STAT_CX) /* command with I-bit set complete */
730 sun3_82586_xmt_int(dev);
731
732 #ifndef NO_NOPCOMMANDS
733 if(stat & STAT_CNA) /* CU went 'not ready' */
734 {
735 if(netif_running(dev))
736 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
737 }
738 #endif
739
740 if(debuglevel > 1)
741 printk("%d",cnt++);
742
743 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */
744 if(p->scb->cmd_cuc) /* timed out? */
745 {
746 printk("%s: Acknowledge timed out.\n",dev->name);
747 sun3_disint();
748 break;
749 }
750 }
751
752 if(debuglevel > 1)
753 printk("i");
754 return IRQ_HANDLED;
755 }
756
757 /*******************************************************
758 * receive-interrupt
759 */
760
761 static void sun3_82586_rcv_int(struct net_device *dev)
762 {
763 int status,cnt=0;
764 unsigned short totlen;
765 struct sk_buff *skb;
766 struct rbd_struct *rbd;
767 struct priv *p = netdev_priv(dev);
768
769 if(debuglevel > 0)
770 printk("R");
771
772 for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
773 {
774 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
775
776 if(status & RFD_OK) /* frame received without error? */
777 {
778 if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */
779 {
780 totlen &= RBD_MASK; /* length of this frame */
781 rbd->status = 0;
782 skb = (struct sk_buff *) dev_alloc_skb(totlen+2);
783 if(skb != NULL)
784 {
785 skb_reserve(skb,2);
786 skb_put(skb,totlen);
787 skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen);
788 skb->protocol=eth_type_trans(skb,dev);
789 netif_rx(skb);
790 p->stats.rx_packets++;
791 }
792 else
793 p->stats.rx_dropped++;
794 }
795 else
796 {
797 int rstat;
798 /* free all RBD's until RBD_LAST is set */
799 totlen = 0;
800 while(!((rstat=swab16(rbd->status)) & RBD_LAST))
801 {
802 totlen += rstat & RBD_MASK;
803 if(!rstat)
804 {
805 printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
806 break;
807 }
808 rbd->status = 0;
809 rbd = (struct rbd_struct *) make32(rbd->next);
810 }
811 totlen += rstat & RBD_MASK;
812 rbd->status = 0;
813 printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
814 p->stats.rx_dropped++;
815 }
816 }
817 else /* frame !(ok), only with 'save-bad-frames' */
818 {
819 printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
820 p->stats.rx_errors++;
821 }
822 p->rfd_top->stat_high = 0;
823 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
824 p->rfd_top->rbd_offset = 0xffff;
825 p->rfd_last->last = 0; /* delete RFD_SUSP */
826 p->rfd_last = p->rfd_top;
827 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
828 p->scb->rfa_offset = make16(p->rfd_top);
829
830 if(debuglevel > 0)
831 printk("%d",cnt++);
832 }
833
834 if(automatic_resume)
835 {
836 WAIT_4_SCB_CMD();
837 p->scb->cmd_ruc = RUC_RESUME;
838 sun3_attn586();
839 WAIT_4_SCB_CMD_RUC();
840 }
841
842 #ifdef WAIT_4_BUSY
843 {
844 int i;
845 for(i=0;i<1024;i++)
846 {
847 if(p->rfd_top->status)
848 break;
849 DELAY_16();
850 if(i == 1023)
851 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
852 }
853 }
854 #endif
855
856 #if 0
857 if(!at_least_one)
858 {
859 int i;
860 volatile struct rfd_struct *rfds=p->rfd_top;
861 volatile struct rbd_struct *rbds;
862 printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
863 for(i=0;i< (p->num_recv_buffs+4);i++)
864 {
865 rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
866 printk("%04x:%04x ",rfds->status,rbds->status);
867 rfds = (struct rfd_struct *) make32(rfds->next);
868 }
869 printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
870 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);
871 }
872 old_at_least = at_least_one;
873 #endif
874
875 if(debuglevel > 0)
876 printk("r");
877 }
878
879 /**********************************************************
880 * handle 'Receiver went not ready'.
881 */
882
883 static void sun3_82586_rnr_int(struct net_device *dev)
884 {
885 struct priv *p = netdev_priv(dev);
886
887 p->stats.rx_errors++;
888
889 WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
890 p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
891 sun3_attn586();
892 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */
893
894 alloc_rfa(dev,(char *)p->rfd_first);
895 /* maybe add a check here, before restarting the RU */
896 startrecv586(dev); /* restart RU */
897
898 printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
899
900 }
901
902 /**********************************************************
903 * handle xmit - interrupt
904 */
905
906 static void sun3_82586_xmt_int(struct net_device *dev)
907 {
908 int status;
909 struct priv *p = netdev_priv(dev);
910
911 if(debuglevel > 0)
912 printk("X");
913
914 status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status);
915 if(!(status & STAT_COMPL))
916 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
917
918 if(status & STAT_OK)
919 {
920 p->stats.tx_packets++;
921 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
922 }
923 else
924 {
925 p->stats.tx_errors++;
926 if(status & TCMD_LATECOLL) {
927 printk("%s: late collision detected.\n",dev->name);
928 p->stats.collisions++;
929 }
930 else if(status & TCMD_NOCARRIER) {
931 p->stats.tx_carrier_errors++;
932 printk("%s: no carrier detected.\n",dev->name);
933 }
934 else if(status & TCMD_LOSTCTS)
935 printk("%s: loss of CTS detected.\n",dev->name);
936 else if(status & TCMD_UNDERRUN) {
937 p->stats.tx_fifo_errors++;
938 printk("%s: DMA underrun detected.\n",dev->name);
939 }
940 else if(status & TCMD_MAXCOLL) {
941 printk("%s: Max. collisions exceeded.\n",dev->name);
942 p->stats.collisions += 16;
943 }
944 }
945
946 #if (NUM_XMIT_BUFFS > 1)
947 if( (++p->xmit_last) == NUM_XMIT_BUFFS)
948 p->xmit_last = 0;
949 #endif
950 netif_wake_queue(dev);
951 }
952
953 /***********************************************************
954 * (re)start the receiver
955 */
956
957 static void startrecv586(struct net_device *dev)
958 {
959 struct priv *p = netdev_priv(dev);
960
961 WAIT_4_SCB_CMD();
962 WAIT_4_SCB_CMD_RUC();
963 p->scb->rfa_offset = make16(p->rfd_first);
964 p->scb->cmd_ruc = RUC_START;
965 sun3_attn586(); /* start cmd. */
966 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */
967 }
968
969 static void sun3_82586_timeout(struct net_device *dev)
970 {
971 struct priv *p = netdev_priv(dev);
972 #ifndef NO_NOPCOMMANDS
973 if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
974 {
975 netif_wake_queue(dev);
976 #ifdef DEBUG
977 printk("%s: strange ... timeout with CU active?!?\n",dev->name);
978 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);
979 #endif
980 p->scb->cmd_cuc = CUC_ABORT;
981 sun3_attn586();
982 WAIT_4_SCB_CMD();
983 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
984 p->scb->cmd_cuc = CUC_START;
985 sun3_attn586();
986 WAIT_4_SCB_CMD();
987 dev->trans_start = jiffies;
988 return 0;
989 }
990 #endif
991 {
992 #ifdef DEBUG
993 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
994 printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status));
995 printk("%s: check, whether you set the right interrupt number!\n",dev->name);
996 #endif
997 sun3_82586_close(dev);
998 sun3_82586_open(dev);
999 }
1000 dev->trans_start = jiffies;
1001 }
1002
1003 /******************************************************
1004 * send frame
1005 */
1006
1007 static int sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev)
1008 {
1009 int len,i;
1010 #ifndef NO_NOPCOMMANDS
1011 int next_nop;
1012 #endif
1013 struct priv *p = netdev_priv(dev);
1014
1015 if(skb->len > XMIT_BUFF_SIZE)
1016 {
1017 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
1018 return 0;
1019 }
1020
1021 netif_stop_queue(dev);
1022
1023 #if(NUM_XMIT_BUFFS > 1)
1024 if(test_and_set_bit(0,(void *) &p->lock)) {
1025 printk("%s: Queue was locked\n",dev->name);
1026 return 1;
1027 }
1028 else
1029 #endif
1030 {
1031 len = skb->len;
1032 if (len < ETH_ZLEN) {
1033 memset((void *)p->xmit_cbuffs[p->xmit_count], 0,
1034 ETH_ZLEN);
1035 len = ETH_ZLEN;
1036 }
1037 skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len);
1038
1039 #if (NUM_XMIT_BUFFS == 1)
1040 # ifdef NO_NOPCOMMANDS
1041
1042 #ifdef DEBUG
1043 if(p->scb->cus & CU_ACTIVE)
1044 {
1045 printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
1046 printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status));
1047 }
1048 #endif
1049
1050 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1051 for(i=0;i<16;i++)
1052 {
1053 p->xmit_cmds[0]->cmd_status = 0;
1054 WAIT_4_SCB_CMD();
1055 if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
1056 p->scb->cmd_cuc = CUC_RESUME;
1057 else
1058 {
1059 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1060 p->scb->cmd_cuc = CUC_START;
1061 }
1062
1063 sun3_attn586();
1064 dev->trans_start = jiffies;
1065 if(!i)
1066 dev_kfree_skb(skb);
1067 WAIT_4_SCB_CMD();
1068 if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
1069 break;
1070 if(p->xmit_cmds[0]->cmd_status)
1071 break;
1072 if(i==15)
1073 printk("%s: Can't start transmit-command.\n",dev->name);
1074 }
1075 # else
1076 next_nop = (p->nop_point + 1) & 0x1;
1077 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1078
1079 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1080 = make16((p->nop_cmds[next_nop]));
1081 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1082
1083 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1084 dev->trans_start = jiffies;
1085 p->nop_point = next_nop;
1086 dev_kfree_skb(skb);
1087 # endif
1088 #else
1089 p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len);
1090 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
1091 next_nop = 0;
1092
1093 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1094 /* linkpointer of xmit-command already points to next nop cmd */
1095 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
1096 p->nop_cmds[next_nop]->cmd_status = 0;
1097
1098 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1099 dev->trans_start = jiffies;
1100 p->xmit_count = next_nop;
1101
1102 {
1103 unsigned long flags;
1104 local_irq_save(flags);
1105 if(p->xmit_count != p->xmit_last)
1106 netif_wake_queue(dev);
1107 p->lock = 0;
1108 local_irq_restore(flags);
1109 }
1110 dev_kfree_skb(skb);
1111 #endif
1112 }
1113 return 0;
1114 }
1115
1116 /*******************************************
1117 * Someone wanna have the statistics
1118 */
1119
1120 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev)
1121 {
1122 struct priv *p = netdev_priv(dev);
1123 unsigned short crc,aln,rsc,ovrn;
1124
1125 crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */
1126 p->scb->crc_errs = 0;
1127 aln = swab16(p->scb->aln_errs);
1128 p->scb->aln_errs = 0;
1129 rsc = swab16(p->scb->rsc_errs);
1130 p->scb->rsc_errs = 0;
1131 ovrn = swab16(p->scb->ovrn_errs);
1132 p->scb->ovrn_errs = 0;
1133
1134 p->stats.rx_crc_errors += crc;
1135 p->stats.rx_fifo_errors += ovrn;
1136 p->stats.rx_frame_errors += aln;
1137 p->stats.rx_dropped += rsc;
1138
1139 return &p->stats;
1140 }
1141
1142 /********************************************************
1143 * Set MC list ..
1144 */
1145
1146 static void set_multicast_list(struct net_device *dev)
1147 {
1148 netif_stop_queue(dev);
1149 sun3_disint();
1150 alloc586(dev);
1151 init586(dev);
1152 startrecv586(dev);
1153 sun3_enaint();
1154 netif_wake_queue(dev);
1155 }
1156
1157 #ifdef MODULE
1158 #error This code is not currently supported as a module
1159 static struct net_device *dev_sun3_82586;
1160
1161 int init_module(void)
1162 {
1163 dev_sun3_82586 = sun3_82586_probe(-1);
1164 if (IS_ERR(dev_sun3_82586))
1165 return PTR_ERR(dev_sun3_82586);
1166 return 0;
1167 }
1168
1169 void cleanup_module(void)
1170 {
1171 unsigned long ioaddr = dev_sun3_82586->base_addr;
1172 unregister_netdev(dev_sun3_82586);
1173 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
1174 iounmap((void *)ioaddr);
1175 free_netdev(dev_sun3_82586);
1176 }
1177 #endif /* MODULE */
1178
1179 #if 0
1180 /*
1181 * DUMP .. we expect a not running CMD unit and enough space
1182 */
1183 void sun3_82586_dump(struct net_device *dev,void *ptr)
1184 {
1185 struct priv *p = netdev_priv(dev);
1186 struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
1187 int i;
1188
1189 p->scb->cmd_cuc = CUC_ABORT;
1190 sun3_attn586();
1191 WAIT_4_SCB_CMD();
1192 WAIT_4_SCB_CMD_RUC();
1193
1194 dump_cmd->cmd_status = 0;
1195 dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
1196 dump_cmd->dump_offset = make16((dump_cmd + 1));
1197 dump_cmd->cmd_link = 0xffff;
1198
1199 p->scb->cbl_offset = make16(dump_cmd);
1200 p->scb->cmd_cuc = CUC_START;
1201 sun3_attn586();
1202 WAIT_4_STAT_COMPL(dump_cmd);
1203
1204 if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
1205 printk("%s: Can't get dump information.\n",dev->name);
1206
1207 for(i=0;i<170;i++) {
1208 printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);
1209 if(i % 24 == 23)
1210 printk("\n");
1211 }
1212 printk("\n");
1213 }
1214 #endif
1215
1216 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards