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OMAP3: PM: default defconfig for PM kernel testing
[linux-ginger.git] / drivers / net / mac8390.c
blobf8fa0c3f0f6408d5761f17f402372f0e9a49a8ee
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 /* 2002-12-30: Try to support more cards, some clues from NetBSD driver */
18 /* 2003-12-26: Make sure Asante cards always work. */
19
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/types.h>
23 #include <linux/fcntl.h>
24 #include <linux/interrupt.h>
25 #include <linux/ptrace.h>
26 #include <linux/ioport.h>
27 #include <linux/nubus.h>
28 #include <linux/in.h>
29 #include <linux/slab.h>
30 #include <linux/string.h>
31 #include <linux/errno.h>
32 #include <linux/init.h>
33 #include <linux/netdevice.h>
34 #include <linux/etherdevice.h>
35 #include <linux/skbuff.h>
36 #include <linux/bitops.h>
37
38 #include <asm/system.h>
39 #include <asm/io.h>
40 #include <asm/dma.h>
41 #include <asm/hwtest.h>
42 #include <asm/macints.h>
43
44 static char version[] =
45 "mac8390.c: v0.4 2001-05-15 David Huggins-Daines <dhd@debian.org> and others\n";
46
47 #define EI_SHIFT(x) (ei_local->reg_offset[x])
48 #define ei_inb(port) in_8(port)
49 #define ei_outb(val,port) out_8(port,val)
50 #define ei_inb_p(port) in_8(port)
51 #define ei_outb_p(val,port) out_8(port,val)
52
53 #include "lib8390.c"
54
55 #define WD_START_PG 0x00 /* First page of TX buffer */
56 #define CABLETRON_RX_START_PG 0x00 /* First page of RX buffer */
57 #define CABLETRON_RX_STOP_PG 0x30 /* Last page +1 of RX ring */
58 #define CABLETRON_TX_START_PG CABLETRON_RX_STOP_PG /* First page of TX buffer */
59
60 /* Unfortunately it seems we have to hardcode these for the moment */
61 /* 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? */
62
63 #define DAYNA_8390_BASE 0x80000
64 #define DAYNA_8390_MEM 0x00000
65
66 #define CABLETRON_8390_BASE 0x90000
67 #define CABLETRON_8390_MEM 0x00000
68
69 #define INTERLAN_8390_BASE 0xE0000
70 #define INTERLAN_8390_MEM 0xD0000
71
72 enum mac8390_type {
73 MAC8390_NONE = -1,
74 MAC8390_APPLE,
75 MAC8390_ASANTE,
76 MAC8390_FARALLON,
77 MAC8390_CABLETRON,
78 MAC8390_DAYNA,
79 MAC8390_INTERLAN,
80 MAC8390_KINETICS,
81 };
82
83 static const char * cardname[] = {
84 "apple",
85 "asante",
86 "farallon",
87 "cabletron",
88 "dayna",
89 "interlan",
90 "kinetics",
91 };
92
93 static int word16[] = {
94 1, /* apple */
95 1, /* asante */
96 1, /* farallon */
97 1, /* cabletron */
98 0, /* dayna */
99 1, /* interlan */
100 0, /* kinetics */
101 };
102
103 /* on which cards do we use NuBus resources? */
104 static int useresources[] = {
105 1, /* apple */
106 1, /* asante */
107 1, /* farallon */
108 0, /* cabletron */
109 0, /* dayna */
110 0, /* interlan */
111 0, /* kinetics */
112 };
113
114 enum mac8390_access {
115 ACCESS_UNKNOWN = 0,
116 ACCESS_32,
117 ACCESS_16,
118 };
119
120 extern int mac8390_memtest(struct net_device * dev);
121 static int mac8390_initdev(struct net_device * dev, struct nubus_dev * ndev,
122 enum mac8390_type type);
123
124 static int mac8390_open(struct net_device * dev);
125 static int mac8390_close(struct net_device * dev);
126 static void mac8390_no_reset(struct net_device *dev);
127 static void interlan_reset(struct net_device *dev);
128
129 /* Sane (32-bit chunk memory read/write) - Some Farallon and Apple do this*/
130 static void sane_get_8390_hdr(struct net_device *dev,
131 struct e8390_pkt_hdr *hdr, int ring_page);
132 static void sane_block_input(struct net_device * dev, int count,
133 struct sk_buff * skb, int ring_offset);
134 static void sane_block_output(struct net_device * dev, int count,
135 const unsigned char * buf, const int start_page);
136
137 /* dayna_memcpy to and from card */
138 static void dayna_memcpy_fromcard(struct net_device *dev, void *to,
139 int from, int count);
140 static void dayna_memcpy_tocard(struct net_device *dev, int to,
141 const void *from, int count);
142
143 /* Dayna - Dayna/Kinetics use this */
144 static void dayna_get_8390_hdr(struct net_device *dev,
145 struct e8390_pkt_hdr *hdr, int ring_page);
146 static void dayna_block_input(struct net_device *dev, int count,
147 struct sk_buff *skb, int ring_offset);
148 static void dayna_block_output(struct net_device *dev, int count,
149 const unsigned char *buf, int start_page);
150
151 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
152 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
153
154 /* Slow Sane (16-bit chunk memory read/write) Cabletron uses this */
155 static void slow_sane_get_8390_hdr(struct net_device *dev,
156 struct e8390_pkt_hdr *hdr, int ring_page);
157 static void slow_sane_block_input(struct net_device *dev, int count,
158 struct sk_buff *skb, int ring_offset);
159 static void slow_sane_block_output(struct net_device *dev, int count,
160 const unsigned char *buf, int start_page);
161 static void word_memcpy_tocard(void *tp, const void *fp, int count);
162 static void word_memcpy_fromcard(void *tp, const void *fp, int count);
163
164 static enum mac8390_type __init mac8390_ident(struct nubus_dev *dev)
165 {
166 switch (dev->dr_sw) {
167 case NUBUS_DRSW_3COM:
168 switch (dev->dr_hw) {
169 case NUBUS_DRHW_APPLE_SONIC_NB:
170 case NUBUS_DRHW_APPLE_SONIC_LC:
171 case NUBUS_DRHW_SONNET:
172 return MAC8390_NONE;
173 break;
174 default:
175 return MAC8390_APPLE;
176 break;
177 }
178 break;
179
180 case NUBUS_DRSW_APPLE:
181 switch (dev->dr_hw) {
182 case NUBUS_DRHW_ASANTE_LC:
183 return MAC8390_NONE;
184 break;
185 case NUBUS_DRHW_CABLETRON:
186 return MAC8390_CABLETRON;
187 break;
188 default:
189 return MAC8390_APPLE;
190 break;
191 }
192 break;
193
194 case NUBUS_DRSW_ASANTE:
195 return MAC8390_ASANTE;
196 break;
197
198 case NUBUS_DRSW_TECHWORKS:
199 case NUBUS_DRSW_DAYNA2:
200 case NUBUS_DRSW_DAYNA_LC:
201 if (dev->dr_hw == NUBUS_DRHW_CABLETRON)
202 return MAC8390_CABLETRON;
203 else
204 return MAC8390_APPLE;
205 break;
206
207 case NUBUS_DRSW_FARALLON:
208 return MAC8390_FARALLON;
209 break;
210
211 case NUBUS_DRSW_KINETICS:
212 switch (dev->dr_hw) {
213 case NUBUS_DRHW_INTERLAN:
214 return MAC8390_INTERLAN;
215 break;
216 default:
217 return MAC8390_KINETICS;
218 break;
219 }
220 break;
221
222 case NUBUS_DRSW_DAYNA:
223 // These correspond to Dayna Sonic cards
224 // which use the macsonic driver
225 if (dev->dr_hw == NUBUS_DRHW_SMC9194 ||
226 dev->dr_hw == NUBUS_DRHW_INTERLAN )
227 return MAC8390_NONE;
228 else
229 return MAC8390_DAYNA;
230 break;
231 }
232 return MAC8390_NONE;
233 }
234
235 static enum mac8390_access __init mac8390_testio(volatile unsigned long membase)
236 {
237 unsigned long outdata = 0xA5A0B5B0;
238 unsigned long indata = 0x00000000;
239 /* Try writing 32 bits */
240 memcpy((char *)membase, (char *)&outdata, 4);
241 /* Now compare them */
242 if (memcmp((char *)&outdata, (char *)membase, 4) == 0)
243 return ACCESS_32;
244 /* Write 16 bit output */
245 word_memcpy_tocard((char *)membase, (char *)&outdata, 4);
246 /* Now read it back */
247 word_memcpy_fromcard((char *)&indata, (char *)membase, 4);
248 if (outdata == indata)
249 return ACCESS_16;
250 return ACCESS_UNKNOWN;
251 }
252
253 static int __init mac8390_memsize(unsigned long membase)
254 {
255 unsigned long flags;
256 int i, j;
257
258 local_irq_save(flags);
259 /* Check up to 32K in 4K increments */
260 for (i = 0; i < 8; i++) {
261 volatile unsigned short *m = (unsigned short *) (membase + (i * 0x1000));
262
263 /* Unwriteable - we have a fully decoded card and the
264 RAM end located */
265 if (hwreg_present(m) == 0)
266 break;
267
268 /* write a distinctive byte */
269 *m = 0xA5A0 | i;
270 /* check that we read back what we wrote */
271 if (*m != (0xA5A0 | i))
272 break;
273
274 /* check for partial decode and wrap */
275 for (j = 0; j < i; j++) {
276 volatile unsigned short *p = (unsigned short *) (membase + (j * 0x1000));
277 if (*p != (0xA5A0 | j))
278 break;
279 }
280 }
281 local_irq_restore(flags);
282 /* in any case, we stopped once we tried one block too many,
283 or once we reached 32K */
284 return i * 0x1000;
285 }
286
287 struct net_device * __init mac8390_probe(int unit)
288 {
289 struct net_device *dev;
290 volatile unsigned short *i;
291 int version_disp = 0;
292 struct nubus_dev * ndev = NULL;
293 int err = -ENODEV;
294
295 struct nubus_dir dir;
296 struct nubus_dirent ent;
297 int offset;
298 static unsigned int slots;
299
300 enum mac8390_type cardtype;
301
302 /* probably should check for Nubus instead */
303
304 if (!MACH_IS_MAC)
305 return ERR_PTR(-ENODEV);
306
307 dev = ____alloc_ei_netdev(0);
308 if (!dev)
309 return ERR_PTR(-ENOMEM);
310
311 if (unit >= 0)
312 sprintf(dev->name, "eth%d", unit);
313
314 while ((ndev = nubus_find_type(NUBUS_CAT_NETWORK, NUBUS_TYPE_ETHERNET, ndev))) {
315 /* Have we seen it already? */
316 if (slots & (1<<ndev->board->slot))
317 continue;
318 slots |= 1<<ndev->board->slot;
319
320 if ((cardtype = mac8390_ident(ndev)) == MAC8390_NONE)
321 continue;
322
323 if (version_disp == 0) {
324 version_disp = 1;
325 printk(version);
326 }
327
328 dev->irq = SLOT2IRQ(ndev->board->slot);
329 /* This is getting to be a habit */
330 dev->base_addr = ndev->board->slot_addr | ((ndev->board->slot&0xf) << 20);
331
332 /* Get some Nubus info - we will trust the card's idea
333 of where its memory and registers are. */
334
335 if (nubus_get_func_dir(ndev, &dir) == -1) {
336 printk(KERN_ERR "%s: Unable to get Nubus functional"
337 " directory for slot %X!\n",
338 dev->name, ndev->board->slot);
339 continue;
340 }
341
342 /* Get the MAC address */
343 if ((nubus_find_rsrc(&dir, NUBUS_RESID_MAC_ADDRESS, &ent)) == -1) {
344 printk(KERN_INFO "%s: Couldn't get MAC address!\n",
345 dev->name);
346 continue;
347 } else {
348 nubus_get_rsrc_mem(dev->dev_addr, &ent, 6);
349 }
350
351 if (useresources[cardtype] == 1) {
352 nubus_rewinddir(&dir);
353 if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_BASEOS, &ent) == -1) {
354 printk(KERN_ERR "%s: Memory offset resource"
355 " for slot %X not found!\n",
356 dev->name, ndev->board->slot);
357 continue;
358 }
359 nubus_get_rsrc_mem(&offset, &ent, 4);
360 dev->mem_start = dev->base_addr + offset;
361 /* yes, this is how the Apple driver does it */
362 dev->base_addr = dev->mem_start + 0x10000;
363 nubus_rewinddir(&dir);
364 if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_LENGTH, &ent) == -1) {
365 printk(KERN_INFO "%s: Memory length resource"
366 " for slot %X not found"
367 ", probing\n",
368 dev->name, ndev->board->slot);
369 offset = mac8390_memsize(dev->mem_start);
370 } else {
371 nubus_get_rsrc_mem(&offset, &ent, 4);
372 }
373 dev->mem_end = dev->mem_start + offset;
374 } else {
375 switch (cardtype) {
376 case MAC8390_KINETICS:
377 case MAC8390_DAYNA: /* it's the same */
378 dev->base_addr =
379 (int)(ndev->board->slot_addr +
380 DAYNA_8390_BASE);
381 dev->mem_start =
382 (int)(ndev->board->slot_addr +
383 DAYNA_8390_MEM);
384 dev->mem_end =
385 dev->mem_start +
386 mac8390_memsize(dev->mem_start);
387 break;
388 case MAC8390_INTERLAN:
389 dev->base_addr =
390 (int)(ndev->board->slot_addr +
391 INTERLAN_8390_BASE);
392 dev->mem_start =
393 (int)(ndev->board->slot_addr +
394 INTERLAN_8390_MEM);
395 dev->mem_end =
396 dev->mem_start +
397 mac8390_memsize(dev->mem_start);
398 break;
399 case MAC8390_CABLETRON:
400 dev->base_addr =
401 (int)(ndev->board->slot_addr +
402 CABLETRON_8390_BASE);
403 dev->mem_start =
404 (int)(ndev->board->slot_addr +
405 CABLETRON_8390_MEM);
406 /* The base address is unreadable if 0x00
407 * has been written to the command register
408 * Reset the chip by writing E8390_NODMA +
409 * E8390_PAGE0 + E8390_STOP just to be
410 * sure
411 */
412 i = (void *)dev->base_addr;
413 *i = 0x21;
414 dev->mem_end =
415 dev->mem_start +
416 mac8390_memsize(dev->mem_start);
417 break;
418
419 default:
420 printk(KERN_ERR "Card type %s is"
421 " unsupported, sorry\n",
422 ndev->board->name);
423 continue;
424 }
425 }
426
427 /* Do the nasty 8390 stuff */
428 if (!mac8390_initdev(dev, ndev, cardtype))
429 break;
430 }
431
432 if (!ndev)
433 goto out;
434 err = register_netdev(dev);
435 if (err)
436 goto out;
437 return dev;
438
439 out:
440 free_netdev(dev);
441 return ERR_PTR(err);
442 }
443
444 #ifdef MODULE
445 MODULE_AUTHOR("David Huggins-Daines <dhd@debian.org> and others");
446 MODULE_DESCRIPTION("Macintosh NS8390-based Nubus Ethernet driver");
447 MODULE_LICENSE("GPL");
448
449 /* overkill, of course */
450 static struct net_device *dev_mac8390[15];
451 int init_module(void)
452 {
453 int i;
454 for (i = 0; i < 15; i++) {
455 struct net_device *dev = mac8390_probe(-1);
456 if (IS_ERR(dev))
457 break;
458 dev_mac890[i] = dev;
459 }
460 if (!i) {
461 printk(KERN_NOTICE "mac8390.c: No useable cards found, driver NOT installed.\n");
462 return -ENODEV;
463 }
464 return 0;
465 }
466
467 void cleanup_module(void)
468 {
469 int i;
470 for (i = 0; i < 15; i++) {
471 struct net_device *dev = dev_mac890[i];
472 if (dev) {
473 unregister_netdev(dev);
474 free_netdev(dev);
475 }
476 }
477 }
478
479 #endif /* MODULE */
480
481 static const struct net_device_ops mac8390_netdev_ops = {
482 .ndo_open = mac8390_open,
483 .ndo_stop = mac8390_close,
484 .ndo_start_xmit = __ei_start_xmit,
485 .ndo_tx_timeout = __ei_tx_timeout,
486 .ndo_get_stats = __ei_get_stats,
487 .ndo_set_multicast_list = __ei_set_multicast_list,
488 .ndo_validate_addr = eth_validate_addr,
489 .ndo_set_mac_address = eth_mac_addr,
490 .ndo_change_mtu = eth_change_mtu,
491 #ifdef CONFIG_NET_POLL_CONTROLLER
492 .ndo_poll_controller = __ei_poll,
493 #endif
494 };
495
496 static int __init mac8390_initdev(struct net_device * dev, struct nubus_dev * ndev,
497 enum mac8390_type type)
498 {
499 static u32 fwrd4_offsets[16]={
500 0, 4, 8, 12,
501 16, 20, 24, 28,
502 32, 36, 40, 44,
503 48, 52, 56, 60
504 };
505 static u32 back4_offsets[16]={
506 60, 56, 52, 48,
507 44, 40, 36, 32,
508 28, 24, 20, 16,
509 12, 8, 4, 0
510 };
511 static u32 fwrd2_offsets[16]={
512 0, 2, 4, 6,
513 8, 10, 12, 14,
514 16, 18, 20, 22,
515 24, 26, 28, 30
516 };
517
518 int access_bitmode = 0;
519
520 /* Now fill in our stuff */
521 dev->netdev_ops = &mac8390_netdev_ops;
522
523 /* GAR, ei_status is actually a macro even though it looks global */
524 ei_status.name = cardname[type];
525 ei_status.word16 = word16[type];
526
527 /* Cabletron's TX/RX buffers are backwards */
528 if (type == MAC8390_CABLETRON) {
529 ei_status.tx_start_page = CABLETRON_TX_START_PG;
530 ei_status.rx_start_page = CABLETRON_RX_START_PG;
531 ei_status.stop_page = CABLETRON_RX_STOP_PG;
532 ei_status.rmem_start = dev->mem_start;
533 ei_status.rmem_end = dev->mem_start + CABLETRON_RX_STOP_PG*256;
534 } else {
535 ei_status.tx_start_page = WD_START_PG;
536 ei_status.rx_start_page = WD_START_PG + TX_PAGES;
537 ei_status.stop_page = (dev->mem_end - dev->mem_start)/256;
538 ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
539 ei_status.rmem_end = dev->mem_end;
540 }
541
542 /* Fill in model-specific information and functions */
543 switch(type) {
544 case MAC8390_FARALLON:
545 case MAC8390_APPLE:
546 switch(mac8390_testio(dev->mem_start)) {
547 case ACCESS_UNKNOWN:
548 printk("Don't know how to access card memory!\n");
549 return -ENODEV;
550 break;
551
552 case ACCESS_16:
553 /* 16 bit card, register map is reversed */
554 ei_status.reset_8390 = &mac8390_no_reset;
555 ei_status.block_input = &slow_sane_block_input;
556 ei_status.block_output = &slow_sane_block_output;
557 ei_status.get_8390_hdr = &slow_sane_get_8390_hdr;
558 ei_status.reg_offset = back4_offsets;
559 break;
560
561 case ACCESS_32:
562 /* 32 bit card, register map is reversed */
563 ei_status.reset_8390 = &mac8390_no_reset;
564 ei_status.block_input = &sane_block_input;
565 ei_status.block_output = &sane_block_output;
566 ei_status.get_8390_hdr = &sane_get_8390_hdr;
567 ei_status.reg_offset = back4_offsets;
568 access_bitmode = 1;
569 break;
570 }
571 break;
572
573 case MAC8390_ASANTE:
574 /* Some Asante cards pass the 32 bit test
575 * but overwrite system memory when run at 32 bit.
576 * so we run them all at 16 bit.
577 */
578 ei_status.reset_8390 = &mac8390_no_reset;
579 ei_status.block_input = &slow_sane_block_input;
580 ei_status.block_output = &slow_sane_block_output;
581 ei_status.get_8390_hdr = &slow_sane_get_8390_hdr;
582 ei_status.reg_offset = back4_offsets;
583 break;
584
585 case MAC8390_CABLETRON:
586 /* 16 bit card, register map is short forward */
587 ei_status.reset_8390 = &mac8390_no_reset;
588 ei_status.block_input = &slow_sane_block_input;
589 ei_status.block_output = &slow_sane_block_output;
590 ei_status.get_8390_hdr = &slow_sane_get_8390_hdr;
591 ei_status.reg_offset = fwrd2_offsets;
592 break;
593
594 case MAC8390_DAYNA:
595 case MAC8390_KINETICS:
596 /* 16 bit memory, register map is forward */
597 /* dayna and similar */
598 ei_status.reset_8390 = &mac8390_no_reset;
599 ei_status.block_input = &dayna_block_input;
600 ei_status.block_output = &dayna_block_output;
601 ei_status.get_8390_hdr = &dayna_get_8390_hdr;
602 ei_status.reg_offset = fwrd4_offsets;
603 break;
604
605 case MAC8390_INTERLAN:
606 /* 16 bit memory, register map is forward */
607 ei_status.reset_8390 = &interlan_reset;
608 ei_status.block_input = &slow_sane_block_input;
609 ei_status.block_output = &slow_sane_block_output;
610 ei_status.get_8390_hdr = &slow_sane_get_8390_hdr;
611 ei_status.reg_offset = fwrd4_offsets;
612 break;
613
614 default:
615 printk(KERN_ERR "Card type %s is unsupported, sorry\n", ndev->board->name);
616 return -ENODEV;
617 }
618
619 __NS8390_init(dev, 0);
620
621 /* Good, done, now spit out some messages */
622 printk(KERN_INFO "%s: %s in slot %X (type %s)\n",
623 dev->name, ndev->board->name, ndev->board->slot, cardname[type]);
624 printk(KERN_INFO
625 "MAC %pM IRQ %d, %d KB shared memory at %#lx, %d-bit access.\n",
626 dev->dev_addr, dev->irq,
627 (unsigned int)(dev->mem_end - dev->mem_start) >> 10,
628 dev->mem_start, access_bitmode ? 32 : 16);
629 return 0;
630 }
631
632 static int mac8390_open(struct net_device *dev)
633 {
634 __ei_open(dev);
635 if (request_irq(dev->irq, __ei_interrupt, 0, "8390 Ethernet", dev)) {
636 printk ("%s: unable to get IRQ %d.\n", dev->name, dev->irq);
637 return -EAGAIN;
638 }
639 return 0;
640 }
641
642 static int mac8390_close(struct net_device *dev)
643 {
644 free_irq(dev->irq, dev);
645 __ei_close(dev);
646 return 0;
647 }
648
649 static void mac8390_no_reset(struct net_device *dev)
650 {
651 ei_status.txing = 0;
652 if (ei_debug > 1)
653 printk("reset not supported\n");
654 return;
655 }
656
657 static void interlan_reset(struct net_device *dev)
658 {
659 unsigned char *target=nubus_slot_addr(IRQ2SLOT(dev->irq));
660 if (ei_debug > 1)
661 printk("Need to reset the NS8390 t=%lu...", jiffies);
662 ei_status.txing = 0;
663 target[0xC0000] = 0;
664 if (ei_debug > 1)
665 printk("reset complete\n");
666 return;
667 }
668
669 /* dayna_memcpy_fromio/dayna_memcpy_toio */
670 /* directly from daynaport.c by Alan Cox */
671 static void dayna_memcpy_fromcard(struct net_device *dev, void *to, int from, int count)
672 {
673 volatile unsigned char *ptr;
674 unsigned char *target=to;
675 from<<=1; /* word, skip overhead */
676 ptr=(unsigned char *)(dev->mem_start+from);
677 /* Leading byte? */
678 if (from&2) {
679 *target++ = ptr[-1];
680 ptr += 2;
681 count--;
682 }
683 while(count>=2)
684 {
685 *(unsigned short *)target = *(unsigned short volatile *)ptr;
686 ptr += 4; /* skip cruft */
687 target += 2;
688 count-=2;
689 }
690 /* Trailing byte? */
691 if(count)
692 *target = *ptr;
693 }
694
695 static void dayna_memcpy_tocard(struct net_device *dev, int to, const void *from, int count)
696 {
697 volatile unsigned short *ptr;
698 const unsigned char *src=from;
699 to<<=1; /* word, skip overhead */
700 ptr=(unsigned short *)(dev->mem_start+to);
701 /* Leading byte? */
702 if (to&2) { /* avoid a byte write (stomps on other data) */
703 ptr[-1] = (ptr[-1]&0xFF00)|*src++;
704 ptr++;
705 count--;
706 }
707 while(count>=2)
708 {
709 *ptr++=*(unsigned short *)src; /* Copy and */
710 ptr++; /* skip cruft */
711 src += 2;
712 count-=2;
713 }
714 /* Trailing byte? */
715 if(count)
716 {
717 /* card doesn't like byte writes */
718 *ptr=(*ptr&0x00FF)|(*src << 8);
719 }
720 }
721
722 /* sane block input/output */
723 static void sane_get_8390_hdr(struct net_device *dev,
724 struct e8390_pkt_hdr *hdr, int ring_page)
725 {
726 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
727 memcpy_fromio((void *)hdr, (char *)dev->mem_start + hdr_start, 4);
728 /* Fix endianness */
729 hdr->count = swab16(hdr->count);
730 }
731
732 static void sane_block_input(struct net_device *dev, int count,
733 struct sk_buff *skb, int ring_offset)
734 {
735 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
736 unsigned long xfer_start = xfer_base + dev->mem_start;
737
738 if (xfer_start + count > ei_status.rmem_end) {
739 /* We must wrap the input move. */
740 int semi_count = ei_status.rmem_end - xfer_start;
741 memcpy_fromio(skb->data, (char *)dev->mem_start + xfer_base, semi_count);
742 count -= semi_count;
743 memcpy_toio(skb->data + semi_count, (char *)ei_status.rmem_start, count);
744 } else {
745 memcpy_fromio(skb->data, (char *)dev->mem_start + xfer_base, count);
746 }
747 }
748
749 static void sane_block_output(struct net_device *dev, int count,
750 const unsigned char *buf, int start_page)
751 {
752 long shmem = (start_page - WD_START_PG)<<8;
753
754 memcpy_toio((char *)dev->mem_start + shmem, buf, count);
755 }
756
757 /* dayna block input/output */
758 static void dayna_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
759 {
760 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
761
762 dayna_memcpy_fromcard(dev, (void *)hdr, hdr_start, 4);
763 /* Fix endianness */
764 hdr->count=(hdr->count&0xFF)<<8|(hdr->count>>8);
765 }
766
767 static void dayna_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
768 {
769 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
770 unsigned long xfer_start = xfer_base+dev->mem_start;
771
772 /* Note the offset math is done in card memory space which is word
773 per long onto our space. */
774
775 if (xfer_start + count > ei_status.rmem_end)
776 {
777 /* We must wrap the input move. */
778 int semi_count = ei_status.rmem_end - xfer_start;
779 dayna_memcpy_fromcard(dev, skb->data, xfer_base, semi_count);
780 count -= semi_count;
781 dayna_memcpy_fromcard(dev, skb->data + semi_count,
782 ei_status.rmem_start - dev->mem_start,
783 count);
784 }
785 else
786 {
787 dayna_memcpy_fromcard(dev, skb->data, xfer_base, count);
788 }
789 }
790
791 static void dayna_block_output(struct net_device *dev, int count, const unsigned char *buf,
792 int start_page)
793 {
794 long shmem = (start_page - WD_START_PG)<<8;
795
796 dayna_memcpy_tocard(dev, shmem, buf, count);
797 }
798
799 /* Cabletron block I/O */
800 static void slow_sane_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
801 int ring_page)
802 {
803 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
804 word_memcpy_fromcard((void *)hdr, (char *)dev->mem_start+hdr_start, 4);
805 /* Register endianism - fix here rather than 8390.c */
806 hdr->count = (hdr->count&0xFF)<<8|(hdr->count>>8);
807 }
808
809 static void slow_sane_block_input(struct net_device *dev, int count, struct sk_buff *skb,
810 int ring_offset)
811 {
812 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
813 unsigned long xfer_start = xfer_base+dev->mem_start;
814
815 if (xfer_start + count > ei_status.rmem_end)
816 {
817 /* We must wrap the input move. */
818 int semi_count = ei_status.rmem_end - xfer_start;
819 word_memcpy_fromcard(skb->data, (char *)dev->mem_start +
820 xfer_base, semi_count);
821 count -= semi_count;
822 word_memcpy_fromcard(skb->data + semi_count,
823 (char *)ei_status.rmem_start, count);
824 }
825 else
826 {
827 word_memcpy_fromcard(skb->data, (char *)dev->mem_start +
828 xfer_base, count);
829 }
830 }
831
832 static void slow_sane_block_output(struct net_device *dev, int count, const unsigned char *buf,
833 int start_page)
834 {
835 long shmem = (start_page - WD_START_PG)<<8;
836
837 word_memcpy_tocard((char *)dev->mem_start + shmem, buf, count);
838 }
839
840 static void word_memcpy_tocard(void *tp, const void *fp, int count)
841 {
842 volatile unsigned short *to = tp;
843 const unsigned short *from = fp;
844
845 count++;
846 count/=2;
847
848 while(count--)
849 *to++=*from++;
850 }
851
852 static void word_memcpy_fromcard(void *tp, const void *fp, int count)
853 {
854 unsigned short *to = tp;
855 const volatile unsigned short *from = fp;
856
857 count++;
858 count/=2;
859
860 while(count--)
861 *to++=*from++;
862 }
863
864
Linux for Ginger Game Console