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cxgb3 - Fix potential MAC hang
[linux-2.6/linux-loongson.git] / drivers / net / mac8390.c
bloba12bb64e3694d0790ff4738e8309ce8c94a830a5
1 /* mac8390.c: New driver for 8390-based Nubus (or Nubus-alike)
2 Ethernet cards on Linux */
3 /* Based on the former daynaport.c driver, by Alan Cox. Some code
4 taken from or inspired by skeleton.c by Donald Becker, acenic.c by
5 Jes Sorensen, and ne2k-pci.c by Donald Becker and Paul Gortmaker.
6
7 This software may be used and distributed according to the terms of
8 the GNU Public License, incorporated herein by reference. */
9
10 /* 2000-02-28: support added for Dayna and Kinetics cards by
11 A.G.deWijn@phys.uu.nl */
12 /* 2000-04-04: support added for Dayna2 by bart@etpmod.phys.tue.nl */
13 /* 2001-04-18: support for DaynaPort E/LC-M by rayk@knightsmanor.org */
14 /* 2001-05-15: support for Cabletron ported from old daynaport driver
15 * and fixed access to Sonic Sys card which masquerades as a Farallon
16 * by rayk@knightsmanor.org */
17
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/fcntl.h>
22 #include <linux/interrupt.h>
23 #include <linux/ptrace.h>
24 #include <linux/ioport.h>
25 #include <linux/nubus.h>
26 #include <linux/in.h>
27 #include <linux/slab.h>
28 #include <linux/string.h>
29 #include <linux/errno.h>
30 #include <linux/init.h>
31 #include <linux/netdevice.h>
32 #include <linux/etherdevice.h>
33 #include <linux/skbuff.h>
34 #include <linux/bitops.h>
35
36 #include <asm/system.h>
37 #include <asm/io.h>
38 #include <asm/dma.h>
39 #include <asm/hwtest.h>
40 #include <asm/macints.h>
41
42 static char version[] =
43 "mac8390.c: v0.4 2001-05-15 David Huggins-Daines <dhd@debian.org> and others\n";
44
45 #define EI_SHIFT(x) (ei_local->reg_offset[x])
46 #define ei_inb(port) in_8(port)
47 #define ei_outb(val,port) out_8(port,val)
48 #define ei_inb_p(port) in_8(port)
49 #define ei_outb_p(val,port) out_8(port,val)
50
51 #include "lib8390.c"
52
53 #define WD_START_PG 0x00 /* First page of TX buffer */
54 #define CABLETRON_RX_START_PG 0x00 /* First page of RX buffer */
55 #define CABLETRON_RX_STOP_PG 0x30 /* Last page +1 of RX ring */
56 #define CABLETRON_TX_START_PG CABLETRON_RX_STOP_PG /* First page of TX buffer */
57
58 /* Unfortunately it seems we have to hardcode these for the moment */
59 /* Shouldn't the card know about this? Does anyone know where to read it off the card? Do we trust the data provided by the card? */
60
61 #define DAYNA_8390_BASE 0x80000
62 #define DAYNA_8390_MEM 0x00000
63
64 #define KINETICS_8390_BASE 0x80000
65 #define KINETICS_8390_MEM 0x00000
66
67 #define CABLETRON_8390_BASE 0x90000
68 #define CABLETRON_8390_MEM 0x00000
69
70 enum mac8390_type {
71 MAC8390_NONE = -1,
72 MAC8390_APPLE,
73 MAC8390_ASANTE,
74 MAC8390_FARALLON, /* Apple, Asante, and Farallon are all compatible */
75 MAC8390_CABLETRON,
76 MAC8390_DAYNA,
77 MAC8390_INTERLAN,
78 MAC8390_KINETICS,
79 MAC8390_FOCUS,
80 MAC8390_SONICSYS,
81 MAC8390_DAYNA2,
82 MAC8390_DAYNA3,
83 };
84
85 static const char * cardname[] = {
86 "apple",
87 "asante",
88 "farallon",
89 "cabletron",
90 "dayna",
91 "interlan",
92 "kinetics",
93 "focus",
94 "sonic systems",
95 "dayna2",
96 "dayna_lc",
97 };
98
99 static int word16[] = {
100 1, /* apple */
101 1, /* asante */
102 1, /* farallon */
103 1, /* cabletron */
104 0, /* dayna */
105 1, /* interlan */
106 0, /* kinetics */
107 1, /* focus (??) */
108 1, /* sonic systems */
109 1, /* dayna2 */
110 1, /* dayna-lc */
111 };
112
113 /* on which cards do we use NuBus resources? */
114 static int useresources[] = {
115 1, /* apple */
116 1, /* asante */
117 1, /* farallon */
118 0, /* cabletron */
119 0, /* dayna */
120 0, /* interlan */
121 0, /* kinetics */
122 0, /* focus (??) */
123 1, /* sonic systems */
124 1, /* dayna2 */
125 1, /* dayna-lc */
126 };
127
128 extern enum mac8390_type mac8390_ident(struct nubus_dev * dev);
129 extern int mac8390_memsize(unsigned long membase);
130 extern int mac8390_memtest(struct net_device * dev);
131 static int mac8390_initdev(struct net_device * dev, struct nubus_dev * ndev,
132 enum mac8390_type type);
133
134 static int mac8390_open(struct net_device * dev);
135 static int mac8390_close(struct net_device * dev);
136 static void mac8390_no_reset(struct net_device *dev);
137
138 /* Sane (32-bit chunk memory read/write) - Apple/Asante/Farallon do this*/
139 static void sane_get_8390_hdr(struct net_device *dev,
140 struct e8390_pkt_hdr *hdr, int ring_page);
141 static void sane_block_input(struct net_device * dev, int count,
142 struct sk_buff * skb, int ring_offset);
143 static void sane_block_output(struct net_device * dev, int count,
144 const unsigned char * buf, const int start_page);
145
146 /* dayna_memcpy to and from card */
147 static void dayna_memcpy_fromcard(struct net_device *dev, void *to,
148 int from, int count);
149 static void dayna_memcpy_tocard(struct net_device *dev, int to,
150 const void *from, int count);
151
152 /* Dayna - Dayna/Kinetics use this */
153 static void dayna_get_8390_hdr(struct net_device *dev,
154 struct e8390_pkt_hdr *hdr, int ring_page);
155 static void dayna_block_input(struct net_device *dev, int count,
156 struct sk_buff *skb, int ring_offset);
157 static void dayna_block_output(struct net_device *dev, int count,
158 const unsigned char *buf, int start_page);
159
160 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
161 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
162
163 /* Slow Sane (16-bit chunk memory read/write) Cabletron uses this */
164 static void slow_sane_get_8390_hdr(struct net_device *dev,
165 struct e8390_pkt_hdr *hdr, int ring_page);
166 static void slow_sane_block_input(struct net_device *dev, int count,
167 struct sk_buff *skb, int ring_offset);
168 static void slow_sane_block_output(struct net_device *dev, int count,
169 const unsigned char *buf, int start_page);
170 static void word_memcpy_tocard(void *tp, const void *fp, int count);
171 static void word_memcpy_fromcard(void *tp, const void *fp, int count);
172
173 enum mac8390_type __init mac8390_ident(struct nubus_dev * dev)
174 {
175 if (dev->dr_sw == NUBUS_DRSW_ASANTE)
176 return MAC8390_ASANTE;
177 if (dev->dr_sw == NUBUS_DRSW_FARALLON)
178 return MAC8390_FARALLON;
179 if (dev->dr_sw == NUBUS_DRSW_KINETICS)
180 return MAC8390_KINETICS;
181 if (dev->dr_sw == NUBUS_DRSW_DAYNA)
182 return MAC8390_DAYNA;
183 if (dev->dr_sw == NUBUS_DRSW_DAYNA2)
184 return MAC8390_DAYNA2;
185 if (dev->dr_sw == NUBUS_DRSW_DAYNA_LC)
186 return MAC8390_DAYNA3;
187 if (dev->dr_hw == NUBUS_DRHW_CABLETRON)
188 return MAC8390_CABLETRON;
189 return MAC8390_NONE;
190 }
191
192 int __init mac8390_memsize(unsigned long membase)
193 {
194 unsigned long flags;
195 int i, j;
196
197 local_irq_save(flags);
198 /* Check up to 32K in 4K increments */
199 for (i = 0; i < 8; i++) {
200 volatile unsigned short *m = (unsigned short *) (membase + (i * 0x1000));
201
202 /* Unwriteable - we have a fully decoded card and the
203 RAM end located */
204 if (hwreg_present(m) == 0)
205 break;
206
207 /* write a distinctive byte */
208 *m = 0xA5A0 | i;
209 /* check that we read back what we wrote */
210 if (*m != (0xA5A0 | i))
211 break;
212
213 /* check for partial decode and wrap */
214 for (j = 0; j < i; j++) {
215 volatile unsigned short *p = (unsigned short *) (membase + (j * 0x1000));
216 if (*p != (0xA5A0 | j))
217 break;
218 }
219 }
220 local_irq_restore(flags);
221 /* in any case, we stopped once we tried one block too many,
222 or once we reached 32K */
223 return i * 0x1000;
224 }
225
226 struct net_device * __init mac8390_probe(int unit)
227 {
228 struct net_device *dev;
229 volatile unsigned short *i;
230 int version_disp = 0;
231 struct nubus_dev * ndev = NULL;
232 int err = -ENODEV;
233
234 struct nubus_dir dir;
235 struct nubus_dirent ent;
236 int offset;
237 static unsigned int slots;
238
239 enum mac8390_type cardtype;
240
241 /* probably should check for Nubus instead */
242
243 if (!MACH_IS_MAC)
244 return ERR_PTR(-ENODEV);
245
246 dev = ____alloc_ei_netdev(0);
247 if (!dev)
248 return ERR_PTR(-ENOMEM);
249
250 if (unit >= 0)
251 sprintf(dev->name, "eth%d", unit);
252
253 SET_MODULE_OWNER(dev);
254
255 while ((ndev = nubus_find_type(NUBUS_CAT_NETWORK, NUBUS_TYPE_ETHERNET, ndev))) {
256 /* Have we seen it already? */
257 if (slots & (1<<ndev->board->slot))
258 continue;
259 slots |= 1<<ndev->board->slot;
260
261 if ((cardtype = mac8390_ident(ndev)) == MAC8390_NONE)
262 continue;
263
264 if (version_disp == 0) {
265 version_disp = 1;
266 printk(version);
267 }
268
269 dev->irq = SLOT2IRQ(ndev->board->slot);
270 /* This is getting to be a habit */
271 dev->base_addr = ndev->board->slot_addr | ((ndev->board->slot&0xf) << 20);
272
273 /* Get some Nubus info - we will trust the card's idea
274 of where its memory and registers are. */
275
276 if (nubus_get_func_dir(ndev, &dir) == -1) {
277 printk(KERN_ERR "%s: Unable to get Nubus functional"
278 " directory for slot %X!\n",
279 dev->name, ndev->board->slot);
280 continue;
281 }
282
283 /* Get the MAC address */
284 if ((nubus_find_rsrc(&dir, NUBUS_RESID_MAC_ADDRESS, &ent)) == -1) {
285 printk(KERN_INFO "%s: Couldn't get MAC address!\n",
286 dev->name);
287 continue;
288 } else {
289 nubus_get_rsrc_mem(dev->dev_addr, &ent, 6);
290 /* Some Sonic Sys cards masquerade as Farallon */
291 if (cardtype == MAC8390_FARALLON &&
292 dev->dev_addr[0] == 0x0 &&
293 dev->dev_addr[1] == 0x40 &&
294 dev->dev_addr[2] == 0x10) {
295 /* This is really Sonic Sys card */
296 cardtype = MAC8390_SONICSYS;
297 }
298 }
299
300 if (useresources[cardtype] == 1) {
301 nubus_rewinddir(&dir);
302 if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_BASEOS, &ent) == -1) {
303 printk(KERN_ERR "%s: Memory offset resource"
304 " for slot %X not found!\n",
305 dev->name, ndev->board->slot);
306 continue;
307 }
308 nubus_get_rsrc_mem(&offset, &ent, 4);
309 dev->mem_start = dev->base_addr + offset;
310 /* yes, this is how the Apple driver does it */
311 dev->base_addr = dev->mem_start + 0x10000;
312 nubus_rewinddir(&dir);
313 if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_LENGTH, &ent) == -1) {
314 printk(KERN_INFO "%s: Memory length resource"
315 " for slot %X not found"
316 ", probing\n",
317 dev->name, ndev->board->slot);
318 offset = mac8390_memsize(dev->mem_start);
319 } else {
320 nubus_get_rsrc_mem(&offset, &ent, 4);
321 }
322 dev->mem_end = dev->mem_start + offset;
323 } else {
324 switch (cardtype) {
325 case MAC8390_KINETICS:
326 case MAC8390_DAYNA: /* it's the same */
327 dev->base_addr =
328 (int)(ndev->board->slot_addr +
329 DAYNA_8390_BASE);
330 dev->mem_start =
331 (int)(ndev->board->slot_addr +
332 DAYNA_8390_MEM);
333 dev->mem_end =
334 dev->mem_start +
335 mac8390_memsize(dev->mem_start);
336 break;
337 case MAC8390_CABLETRON:
338 dev->base_addr =
339 (int)(ndev->board->slot_addr +
340 CABLETRON_8390_BASE);
341 dev->mem_start =
342 (int)(ndev->board->slot_addr +
343 CABLETRON_8390_MEM);
344 /* The base address is unreadable if 0x00
345 * has been written to the command register
346 * Reset the chip by writing E8390_NODMA +
347 * E8390_PAGE0 + E8390_STOP just to be
348 * sure
349 */
350 i = (void *)dev->base_addr;
351 *i = 0x21;
352 dev->mem_end =
353 dev->mem_start +
354 mac8390_memsize(dev->mem_start);
355 break;
356
357 default:
358 printk(KERN_ERR "Card type %s is"
359 " unsupported, sorry\n",
360 cardname[cardtype]);
361 continue;
362 }
363 }
364
365 /* Do the nasty 8390 stuff */
366 if (!mac8390_initdev(dev, ndev, cardtype))
367 break;
368 }
369
370 if (!ndev)
371 goto out;
372 err = register_netdev(dev);
373 if (err)
374 goto out;
375 return dev;
376
377 out:
378 free_netdev(dev);
379 return ERR_PTR(err);
380 }
381
382 #ifdef MODULE
383 MODULE_AUTHOR("David Huggins-Daines <dhd@debian.org> and others");
384 MODULE_DESCRIPTION("Macintosh NS8390-based Nubus Ethernet driver");
385 MODULE_LICENSE("GPL");
386
387 /* overkill, of course */
388 static struct net_device *dev_mac8390[15];
389 int init_module(void)
390 {
391 int i;
392 for (i = 0; i < 15; i++) {
393 struct net_device *dev = mac8390_probe(-1);
394 if (IS_ERR(dev))
395 break;
396 dev_mac890[i] = dev;
397 }
398 if (!i) {
399 printk(KERN_NOTICE "mac8390.c: No useable cards found, driver NOT installed.\n");
400 return -ENODEV;
401 }
402 return 0;
403 }
404
405 void cleanup_module(void)
406 {
407 int i;
408 for (i = 0; i < 15; i++) {
409 struct net_device *dev = dev_mac890[i];
410 if (dev) {
411 unregister_netdev(dev);
412 free_netdev(dev);
413 }
414 }
415 }
416
417 #endif /* MODULE */
418
419 static int __init mac8390_initdev(struct net_device * dev, struct nubus_dev * ndev,
420 enum mac8390_type type)
421 {
422 static u32 fwrd4_offsets[16]={
423 0, 4, 8, 12,
424 16, 20, 24, 28,
425 32, 36, 40, 44,
426 48, 52, 56, 60
427 };
428 static u32 back4_offsets[16]={
429 60, 56, 52, 48,
430 44, 40, 36, 32,
431 28, 24, 20, 16,
432 12, 8, 4, 0
433 };
434 static u32 fwrd2_offsets[16]={
435 0, 2, 4, 6,
436 8, 10, 12, 14,
437 16, 18, 20, 22,
438 24, 26, 28, 30
439 };
440
441 int access_bitmode;
442
443 /* Now fill in our stuff */
444 dev->open = &mac8390_open;
445 dev->stop = &mac8390_close;
446 #ifdef CONFIG_NET_POLL_CONTROLLER
447 dev->poll_controller = __ei_poll;
448 #endif
449
450 /* GAR, ei_status is actually a macro even though it looks global */
451 ei_status.name = cardname[type];
452 ei_status.word16 = word16[type];
453
454 /* Cabletron's TX/RX buffers are backwards */
455 if (type == MAC8390_CABLETRON) {
456 ei_status.tx_start_page = CABLETRON_TX_START_PG;
457 ei_status.rx_start_page = CABLETRON_RX_START_PG;
458 ei_status.stop_page = CABLETRON_RX_STOP_PG;
459 ei_status.rmem_start = dev->mem_start;
460 ei_status.rmem_end = dev->mem_start + CABLETRON_RX_STOP_PG*256;
461 } else {
462 ei_status.tx_start_page = WD_START_PG;
463 ei_status.rx_start_page = WD_START_PG + TX_PAGES;
464 ei_status.stop_page = (dev->mem_end - dev->mem_start)/256;
465 ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
466 ei_status.rmem_end = dev->mem_end;
467 }
468
469 /* Fill in model-specific information and functions */
470 switch(type) {
471 case MAC8390_SONICSYS:
472 /* 16 bit card, register map is reversed */
473 ei_status.reset_8390 = &mac8390_no_reset;
474 ei_status.block_input = &slow_sane_block_input;
475 ei_status.block_output = &slow_sane_block_output;
476 ei_status.get_8390_hdr = &slow_sane_get_8390_hdr;
477 ei_status.reg_offset = back4_offsets;
478 access_bitmode = 0;
479 break;
480 case MAC8390_FARALLON:
481 case MAC8390_APPLE:
482 case MAC8390_ASANTE:
483 case MAC8390_DAYNA2:
484 case MAC8390_DAYNA3:
485 /* 32 bit card, register map is reversed */
486 /* sane */
487 ei_status.reset_8390 = &mac8390_no_reset;
488 ei_status.block_input = &sane_block_input;
489 ei_status.block_output = &sane_block_output;
490 ei_status.get_8390_hdr = &sane_get_8390_hdr;
491 ei_status.reg_offset = back4_offsets;
492 access_bitmode = 1;
493 break;
494 case MAC8390_CABLETRON:
495 /* 16 bit card, register map is short forward */
496 ei_status.reset_8390 = &mac8390_no_reset;
497 ei_status.block_input = &slow_sane_block_input;
498 ei_status.block_output = &slow_sane_block_output;
499 ei_status.get_8390_hdr = &slow_sane_get_8390_hdr;
500 ei_status.reg_offset = fwrd2_offsets;
501 access_bitmode = 0;
502 break;
503 case MAC8390_DAYNA:
504 case MAC8390_KINETICS:
505 /* 16 bit memory */
506 /* dayna and similar */
507 ei_status.reset_8390 = &mac8390_no_reset;
508 ei_status.block_input = &dayna_block_input;
509 ei_status.block_output = &dayna_block_output;
510 ei_status.get_8390_hdr = &dayna_get_8390_hdr;
511 ei_status.reg_offset = fwrd4_offsets;
512 access_bitmode = 0;
513 break;
514 default:
515 printk(KERN_ERR "Card type %s is unsupported, sorry\n", cardname[type]);
516 return -ENODEV;
517 }
518
519 __NS8390_init(dev, 0);
520
521 /* Good, done, now spit out some messages */
522 printk(KERN_INFO "%s: %s in slot %X (type %s)\n",
523 dev->name, ndev->board->name, ndev->board->slot, cardname[type]);
524 printk(KERN_INFO "MAC ");
525 {
526 int i;
527 for (i = 0; i < 6; i++) {
528 printk("%2.2x", dev->dev_addr[i]);
529 if (i < 5)
530 printk(":");
531 }
532 }
533 printk(" IRQ %d, shared memory at %#lx-%#lx, %d-bit access.\n",
534 dev->irq, dev->mem_start, dev->mem_end-1,
535 access_bitmode?32:16);
536 return 0;
537 }
538
539 static int mac8390_open(struct net_device *dev)
540 {
541 __ei_open(dev);
542 if (request_irq(dev->irq, __ei_interrupt, 0, "8390 Ethernet", dev)) {
543 printk ("%s: unable to get IRQ %d.\n", dev->name, dev->irq);
544 return -EAGAIN;
545 }
546 return 0;
547 }
548
549 static int mac8390_close(struct net_device *dev)
550 {
551 free_irq(dev->irq, dev);
552 __ei_close(dev);
553 return 0;
554 }
555
556 static void mac8390_no_reset(struct net_device *dev)
557 {
558 ei_status.txing = 0;
559 if (ei_debug > 1)
560 printk("reset not supported\n");
561 return;
562 }
563
564 /* dayna_memcpy_fromio/dayna_memcpy_toio */
565 /* directly from daynaport.c by Alan Cox */
566 static void dayna_memcpy_fromcard(struct net_device *dev, void *to, int from, int count)
567 {
568 volatile unsigned char *ptr;
569 unsigned char *target=to;
570 from<<=1; /* word, skip overhead */
571 ptr=(unsigned char *)(dev->mem_start+from);
572 /* Leading byte? */
573 if (from&2) {
574 *target++ = ptr[-1];
575 ptr += 2;
576 count--;
577 }
578 while(count>=2)
579 {
580 *(unsigned short *)target = *(unsigned short volatile *)ptr;
581 ptr += 4; /* skip cruft */
582 target += 2;
583 count-=2;
584 }
585 /* Trailing byte? */
586 if(count)
587 *target = *ptr;
588 }
589
590 static void dayna_memcpy_tocard(struct net_device *dev, int to, const void *from, int count)
591 {
592 volatile unsigned short *ptr;
593 const unsigned char *src=from;
594 to<<=1; /* word, skip overhead */
595 ptr=(unsigned short *)(dev->mem_start+to);
596 /* Leading byte? */
597 if (to&2) { /* avoid a byte write (stomps on other data) */
598 ptr[-1] = (ptr[-1]&0xFF00)|*src++;
599 ptr++;
600 count--;
601 }
602 while(count>=2)
603 {
604 *ptr++=*(unsigned short *)src; /* Copy and */
605 ptr++; /* skip cruft */
606 src += 2;
607 count-=2;
608 }
609 /* Trailing byte? */
610 if(count)
611 {
612 /* card doesn't like byte writes */
613 *ptr=(*ptr&0x00FF)|(*src << 8);
614 }
615 }
616
617 /* sane block input/output */
618 static void sane_get_8390_hdr(struct net_device *dev,
619 struct e8390_pkt_hdr *hdr, int ring_page)
620 {
621 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
622 memcpy_fromio((void *)hdr, (char *)dev->mem_start + hdr_start, 4);
623 /* Fix endianness */
624 hdr->count = swab16(hdr->count);
625 }
626
627 static void sane_block_input(struct net_device *dev, int count,
628 struct sk_buff *skb, int ring_offset)
629 {
630 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
631 unsigned long xfer_start = xfer_base + dev->mem_start;
632
633 if (xfer_start + count > ei_status.rmem_end) {
634 /* We must wrap the input move. */
635 int semi_count = ei_status.rmem_end - xfer_start;
636 memcpy_fromio(skb->data, (char *)dev->mem_start + xfer_base, semi_count);
637 count -= semi_count;
638 memcpy_toio(skb->data + semi_count, (char *)ei_status.rmem_start, count);
639 } else {
640 memcpy_fromio(skb->data, (char *)dev->mem_start + xfer_base, count);
641 }
642 }
643
644 static void sane_block_output(struct net_device *dev, int count,
645 const unsigned char *buf, int start_page)
646 {
647 long shmem = (start_page - WD_START_PG)<<8;
648
649 memcpy_toio((char *)dev->mem_start + shmem, buf, count);
650 }
651
652 /* dayna block input/output */
653 static void dayna_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
654 {
655 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
656
657 dayna_memcpy_fromcard(dev, (void *)hdr, hdr_start, 4);
658 /* Fix endianness */
659 hdr->count=(hdr->count&0xFF)<<8|(hdr->count>>8);
660 }
661
662 static void dayna_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
663 {
664 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
665 unsigned long xfer_start = xfer_base+dev->mem_start;
666
667 /* Note the offset math is done in card memory space which is word
668 per long onto our space. */
669
670 if (xfer_start + count > ei_status.rmem_end)
671 {
672 /* We must wrap the input move. */
673 int semi_count = ei_status.rmem_end - xfer_start;
674 dayna_memcpy_fromcard(dev, skb->data, xfer_base, semi_count);
675 count -= semi_count;
676 dayna_memcpy_fromcard(dev, skb->data + semi_count,
677 ei_status.rmem_start - dev->mem_start,
678 count);
679 }
680 else
681 {
682 dayna_memcpy_fromcard(dev, skb->data, xfer_base, count);
683 }
684 }
685
686 static void dayna_block_output(struct net_device *dev, int count, const unsigned char *buf,
687 int start_page)
688 {
689 long shmem = (start_page - WD_START_PG)<<8;
690
691 dayna_memcpy_tocard(dev, shmem, buf, count);
692 }
693
694 /* Cabletron block I/O */
695 static void slow_sane_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
696 int ring_page)
697 {
698 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
699 word_memcpy_fromcard((void *)hdr, (char *)dev->mem_start+hdr_start, 4);
700 /* Register endianism - fix here rather than 8390.c */
701 hdr->count = (hdr->count&0xFF)<<8|(hdr->count>>8);
702 }
703
704 static void slow_sane_block_input(struct net_device *dev, int count, struct sk_buff *skb,
705 int ring_offset)
706 {
707 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
708 unsigned long xfer_start = xfer_base+dev->mem_start;
709
710 if (xfer_start + count > ei_status.rmem_end)
711 {
712 /* We must wrap the input move. */
713 int semi_count = ei_status.rmem_end - xfer_start;
714 word_memcpy_fromcard(skb->data, (char *)dev->mem_start +
715 xfer_base, semi_count);
716 count -= semi_count;
717 word_memcpy_fromcard(skb->data + semi_count,
718 (char *)ei_status.rmem_start, count);
719 }
720 else
721 {
722 word_memcpy_fromcard(skb->data, (char *)dev->mem_start +
723 xfer_base, count);
724 }
725 }
726
727 static void slow_sane_block_output(struct net_device *dev, int count, const unsigned char *buf,
728 int start_page)
729 {
730 long shmem = (start_page - WD_START_PG)<<8;
731
732 word_memcpy_tocard((char *)dev->mem_start + shmem, buf, count);
733 }
734
735 static void word_memcpy_tocard(void *tp, const void *fp, int count)
736 {
737 volatile unsigned short *to = tp;
738 const unsigned short *from = fp;
739
740 count++;
741 count/=2;
742
743 while(count--)
744 *to++=*from++;
745 }
746
747 static void word_memcpy_fromcard(void *tp, const void *fp, int count)
748 {
749 unsigned short *to = tp;
750 const volatile unsigned short *from = fp;
751
752 count++;
753 count/=2;
754
755 while(count--)
756 *to++=*from++;
757 }
758
759
linux kernel for loongson