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[mirror_ubuntu-kernels.git] / drivers / net / ethernet / 8390 / mac8390.c
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/types.h>
25 #include <linux/fcntl.h>
26 #include <linux/interrupt.h>
27 #include <linux/ptrace.h>
28 #include <linux/ioport.h>
29 #include <linux/nubus.h>
30 #include <linux/in.h>
31 #include <linux/string.h>
32 #include <linux/errno.h>
33 #include <linux/init.h>
34 #include <linux/netdevice.h>
35 #include <linux/etherdevice.h>
36 #include <linux/skbuff.h>
37 #include <linux/bitops.h>
38 #include <linux/io.h>
39
40 #include <asm/dma.h>
41 #include <asm/hwtest.h>
42 #include <asm/macints.h>
43
44 static char version[] =
45 "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
59 /* First page of TX buffer */
60
61 /*
62 * Unfortunately it seems we have to hardcode these for the moment
63 * Shouldn't the card know about this?
64 * Does anyone know where to read it off the card?
65 * Do we trust the data provided by the card?
66 */
67
68 #define DAYNA_8390_BASE 0x80000
69 #define DAYNA_8390_MEM 0x00000
70
71 #define CABLETRON_8390_BASE 0x90000
72 #define CABLETRON_8390_MEM 0x00000
73
74 #define INTERLAN_8390_BASE 0xE0000
75 #define INTERLAN_8390_MEM 0xD0000
76
77 enum mac8390_type {
78 MAC8390_NONE = -1,
79 MAC8390_APPLE,
80 MAC8390_ASANTE,
81 MAC8390_FARALLON,
82 MAC8390_CABLETRON,
83 MAC8390_DAYNA,
84 MAC8390_INTERLAN,
85 MAC8390_KINETICS,
86 };
87
88 static const char *cardname[] = {
89 "apple",
90 "asante",
91 "farallon",
92 "cabletron",
93 "dayna",
94 "interlan",
95 "kinetics",
96 };
97
98 static const int word16[] = {
99 1, /* apple */
100 1, /* asante */
101 1, /* farallon */
102 1, /* cabletron */
103 0, /* dayna */
104 1, /* interlan */
105 0, /* kinetics */
106 };
107
108 /* on which cards do we use NuBus resources? */
109 static const int useresources[] = {
110 1, /* apple */
111 1, /* asante */
112 1, /* farallon */
113 0, /* cabletron */
114 0, /* dayna */
115 0, /* interlan */
116 0, /* kinetics */
117 };
118
119 enum mac8390_access {
120 ACCESS_UNKNOWN = 0,
121 ACCESS_32,
122 ACCESS_16,
123 };
124
125 extern int mac8390_memtest(struct net_device *dev);
126 static int mac8390_initdev(struct net_device *dev, struct nubus_board *board,
127 enum mac8390_type type);
128
129 static int mac8390_open(struct net_device *dev);
130 static int mac8390_close(struct net_device *dev);
131 static void mac8390_no_reset(struct net_device *dev);
132 static void interlan_reset(struct net_device *dev);
133
134 /* Sane (32-bit chunk memory read/write) - Some Farallon and Apple do this*/
135 static void sane_get_8390_hdr(struct net_device *dev,
136 struct e8390_pkt_hdr *hdr, int ring_page);
137 static void sane_block_input(struct net_device *dev, int count,
138 struct sk_buff *skb, int ring_offset);
139 static void sane_block_output(struct net_device *dev, int count,
140 const unsigned char *buf, const int start_page);
141
142 /* dayna_memcpy to and from card */
143 static void dayna_memcpy_fromcard(struct net_device *dev, void *to,
144 int from, int count);
145 static void dayna_memcpy_tocard(struct net_device *dev, int to,
146 const void *from, int count);
147
148 /* Dayna - Dayna/Kinetics use this */
149 static void dayna_get_8390_hdr(struct net_device *dev,
150 struct e8390_pkt_hdr *hdr, int ring_page);
151 static void dayna_block_input(struct net_device *dev, int count,
152 struct sk_buff *skb, int ring_offset);
153 static void dayna_block_output(struct net_device *dev, int count,
154 const unsigned char *buf, int start_page);
155
156 #define memcmp_withio(a, b, c) memcmp((a), (void *)(b), (c))
157
158 /* Slow Sane (16-bit chunk memory read/write) Cabletron uses this */
159 static void slow_sane_get_8390_hdr(struct net_device *dev,
160 struct e8390_pkt_hdr *hdr, int ring_page);
161 static void slow_sane_block_input(struct net_device *dev, int count,
162 struct sk_buff *skb, int ring_offset);
163 static void slow_sane_block_output(struct net_device *dev, int count,
164 const unsigned char *buf, int start_page);
165 static void word_memcpy_tocard(unsigned long tp, const void *fp, int count);
166 static void word_memcpy_fromcard(void *tp, unsigned long fp, int count);
167
168 static enum mac8390_type mac8390_ident(struct nubus_rsrc *fres)
169 {
170 switch (fres->dr_sw) {
171 case NUBUS_DRSW_3COM:
172 switch (fres->dr_hw) {
173 case NUBUS_DRHW_APPLE_SONIC_NB:
174 case NUBUS_DRHW_APPLE_SONIC_LC:
175 case NUBUS_DRHW_SONNET:
176 return MAC8390_NONE;
177 default:
178 return MAC8390_APPLE;
179 }
180 break;
181
182 case NUBUS_DRSW_APPLE:
183 switch (fres->dr_hw) {
184 case NUBUS_DRHW_ASANTE_LC:
185 return MAC8390_NONE;
186 case NUBUS_DRHW_CABLETRON:
187 return MAC8390_CABLETRON;
188 default:
189 return MAC8390_APPLE;
190 }
191 break;
192
193 case NUBUS_DRSW_ASANTE:
194 return MAC8390_ASANTE;
195 break;
196
197 case NUBUS_DRSW_TECHWORKS:
198 case NUBUS_DRSW_DAYNA2:
199 case NUBUS_DRSW_DAYNA_LC:
200 if (fres->dr_hw == NUBUS_DRHW_CABLETRON)
201 return MAC8390_CABLETRON;
202 else
203 return MAC8390_APPLE;
204 break;
205
206 case NUBUS_DRSW_FARALLON:
207 return MAC8390_FARALLON;
208 break;
209
210 case NUBUS_DRSW_KINETICS:
211 switch (fres->dr_hw) {
212 case NUBUS_DRHW_INTERLAN:
213 return MAC8390_INTERLAN;
214 default:
215 return MAC8390_KINETICS;
216 }
217 break;
218
219 case NUBUS_DRSW_DAYNA:
220 /*
221 * These correspond to Dayna Sonic cards
222 * which use the macsonic driver
223 */
224 if (fres->dr_hw == NUBUS_DRHW_SMC9194 ||
225 fres->dr_hw == NUBUS_DRHW_INTERLAN)
226 return MAC8390_NONE;
227 else
228 return MAC8390_DAYNA;
229 break;
230 }
231 return MAC8390_NONE;
232 }
233
234 static enum mac8390_access mac8390_testio(unsigned long membase)
235 {
236 unsigned long outdata = 0xA5A0B5B0;
237 unsigned long indata = 0x00000000;
238 /* Try writing 32 bits */
239 memcpy_toio((void __iomem *)membase, &outdata, 4);
240 /* Now compare them */
241 if (memcmp_withio(&outdata, membase, 4) == 0)
242 return ACCESS_32;
243 /* Write 16 bit output */
244 word_memcpy_tocard(membase, &outdata, 4);
245 /* Now read it back */
246 word_memcpy_fromcard(&indata, membase, 4);
247 if (outdata == indata)
248 return ACCESS_16;
249 return ACCESS_UNKNOWN;
250 }
251
252 static int mac8390_memsize(unsigned long membase)
253 {
254 unsigned long flags;
255 int i, j;
256
257 local_irq_save(flags);
258 /* Check up to 32K in 4K increments */
259 for (i = 0; i < 8; i++) {
260 volatile unsigned short *m = (unsigned short *)(membase + (i * 0x1000));
261
262 /* Unwriteable - we have a fully decoded card and the
263 RAM end located */
264 if (hwreg_present(m) == 0)
265 break;
266
267 /* write a distinctive byte */
268 *m = 0xA5A0 | i;
269 /* check that we read back what we wrote */
270 if (*m != (0xA5A0 | i))
271 break;
272
273 /* check for partial decode and wrap */
274 for (j = 0; j < i; j++) {
275 volatile unsigned short *p = (unsigned short *)(membase + (j * 0x1000));
276 if (*p != (0xA5A0 | j))
277 break;
278 }
279 }
280 local_irq_restore(flags);
281 /*
282 * in any case, we stopped once we tried one block too many,
283 * or once we reached 32K
284 */
285 return i * 0x1000;
286 }
287
288 static bool mac8390_rsrc_init(struct net_device *dev,
289 struct nubus_rsrc *fres,
290 enum mac8390_type cardtype)
291 {
292 struct nubus_board *board = fres->board;
293 struct nubus_dir dir;
294 struct nubus_dirent ent;
295 int offset;
296 volatile unsigned short *i;
297
298 dev->irq = SLOT2IRQ(board->slot);
299 /* This is getting to be a habit */
300 dev->base_addr = board->slot_addr | ((board->slot & 0xf) << 20);
301
302 /*
303 * Get some Nubus info - we will trust the card's idea
304 * of where its memory and registers are.
305 */
306
307 if (nubus_get_func_dir(fres, &dir) == -1) {
308 dev_err(&board->dev,
309 "Unable to get Nubus functional directory\n");
310 return false;
311 }
312
313 /* Get the MAC address */
314 if (nubus_find_rsrc(&dir, NUBUS_RESID_MAC_ADDRESS, &ent) == -1) {
315 dev_info(&board->dev, "MAC address resource not found\n");
316 return false;
317 }
318
319 nubus_get_rsrc_mem(dev->dev_addr, &ent, 6);
320
321 if (useresources[cardtype] == 1) {
322 nubus_rewinddir(&dir);
323 if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_BASEOS,
324 &ent) == -1) {
325 dev_err(&board->dev,
326 "Memory offset resource not found\n");
327 return false;
328 }
329 nubus_get_rsrc_mem(&offset, &ent, 4);
330 dev->mem_start = dev->base_addr + offset;
331 /* yes, this is how the Apple driver does it */
332 dev->base_addr = dev->mem_start + 0x10000;
333 nubus_rewinddir(&dir);
334 if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_LENGTH,
335 &ent) == -1) {
336 dev_info(&board->dev,
337 "Memory length resource not found, probing\n");
338 offset = mac8390_memsize(dev->mem_start);
339 } else {
340 nubus_get_rsrc_mem(&offset, &ent, 4);
341 }
342 dev->mem_end = dev->mem_start + offset;
343 } else {
344 switch (cardtype) {
345 case MAC8390_KINETICS:
346 case MAC8390_DAYNA: /* it's the same */
347 dev->base_addr = (int)(board->slot_addr +
348 DAYNA_8390_BASE);
349 dev->mem_start = (int)(board->slot_addr +
350 DAYNA_8390_MEM);
351 dev->mem_end = dev->mem_start +
352 mac8390_memsize(dev->mem_start);
353 break;
354 case MAC8390_INTERLAN:
355 dev->base_addr = (int)(board->slot_addr +
356 INTERLAN_8390_BASE);
357 dev->mem_start = (int)(board->slot_addr +
358 INTERLAN_8390_MEM);
359 dev->mem_end = dev->mem_start +
360 mac8390_memsize(dev->mem_start);
361 break;
362 case MAC8390_CABLETRON:
363 dev->base_addr = (int)(board->slot_addr +
364 CABLETRON_8390_BASE);
365 dev->mem_start = (int)(board->slot_addr +
366 CABLETRON_8390_MEM);
367 /* The base address is unreadable if 0x00
368 * has been written to the command register
369 * Reset the chip by writing E8390_NODMA +
370 * E8390_PAGE0 + E8390_STOP just to be
371 * sure
372 */
373 i = (void *)dev->base_addr;
374 *i = 0x21;
375 dev->mem_end = dev->mem_start +
376 mac8390_memsize(dev->mem_start);
377 break;
378
379 default:
380 dev_err(&board->dev,
381 "No known base address for card type\n");
382 return false;
383 }
384 }
385
386 return true;
387 }
388
389 static int mac8390_device_probe(struct nubus_board *board)
390 {
391 struct net_device *dev;
392 int err = -ENODEV;
393 struct nubus_rsrc *fres;
394 enum mac8390_type cardtype = MAC8390_NONE;
395
396 dev = ____alloc_ei_netdev(0);
397 if (!dev)
398 return -ENOMEM;
399
400 SET_NETDEV_DEV(dev, &board->dev);
401
402 for_each_board_func_rsrc(board, fres) {
403 if (fres->category != NUBUS_CAT_NETWORK ||
404 fres->type != NUBUS_TYPE_ETHERNET)
405 continue;
406
407 cardtype = mac8390_ident(fres);
408 if (cardtype == MAC8390_NONE)
409 continue;
410
411 if (mac8390_rsrc_init(dev, fres, cardtype))
412 break;
413 }
414 if (!fres)
415 goto out;
416
417 err = mac8390_initdev(dev, board, cardtype);
418 if (err)
419 goto out;
420
421 err = register_netdev(dev);
422 if (err)
423 goto out;
424
425 nubus_set_drvdata(board, dev);
426 return 0;
427
428 out:
429 free_netdev(dev);
430 return err;
431 }
432
433 static int mac8390_device_remove(struct nubus_board *board)
434 {
435 struct net_device *dev = nubus_get_drvdata(board);
436
437 unregister_netdev(dev);
438 free_netdev(dev);
439 return 0;
440 }
441
442 static struct nubus_driver mac8390_driver = {
443 .probe = mac8390_device_probe,
444 .remove = mac8390_device_remove,
445 .driver = {
446 .name = KBUILD_MODNAME,
447 .owner = THIS_MODULE,
448 }
449 };
450
451 MODULE_AUTHOR("David Huggins-Daines <dhd@debian.org> and others");
452 MODULE_DESCRIPTION("Macintosh NS8390-based Nubus Ethernet driver");
453 MODULE_LICENSE("GPL");
454
455 static int __init mac8390_init(void)
456 {
457 return nubus_driver_register(&mac8390_driver);
458 }
459 module_init(mac8390_init);
460
461 static void __exit mac8390_exit(void)
462 {
463 nubus_driver_unregister(&mac8390_driver);
464 }
465 module_exit(mac8390_exit);
466
467 static const struct net_device_ops mac8390_netdev_ops = {
468 .ndo_open = mac8390_open,
469 .ndo_stop = mac8390_close,
470 .ndo_start_xmit = __ei_start_xmit,
471 .ndo_tx_timeout = __ei_tx_timeout,
472 .ndo_get_stats = __ei_get_stats,
473 .ndo_set_rx_mode = __ei_set_multicast_list,
474 .ndo_validate_addr = eth_validate_addr,
475 .ndo_set_mac_address = eth_mac_addr,
476 #ifdef CONFIG_NET_POLL_CONTROLLER
477 .ndo_poll_controller = __ei_poll,
478 #endif
479 };
480
481 static int mac8390_initdev(struct net_device *dev, struct nubus_board *board,
482 enum mac8390_type type)
483 {
484 static u32 fwrd4_offsets[16] = {
485 0, 4, 8, 12,
486 16, 20, 24, 28,
487 32, 36, 40, 44,
488 48, 52, 56, 60
489 };
490 static u32 back4_offsets[16] = {
491 60, 56, 52, 48,
492 44, 40, 36, 32,
493 28, 24, 20, 16,
494 12, 8, 4, 0
495 };
496 static u32 fwrd2_offsets[16] = {
497 0, 2, 4, 6,
498 8, 10, 12, 14,
499 16, 18, 20, 22,
500 24, 26, 28, 30
501 };
502
503 int access_bitmode = 0;
504
505 /* Now fill in our stuff */
506 dev->netdev_ops = &mac8390_netdev_ops;
507
508 /* GAR, ei_status is actually a macro even though it looks global */
509 ei_status.name = cardname[type];
510 ei_status.word16 = word16[type];
511
512 /* Cabletron's TX/RX buffers are backwards */
513 if (type == MAC8390_CABLETRON) {
514 ei_status.tx_start_page = CABLETRON_TX_START_PG;
515 ei_status.rx_start_page = CABLETRON_RX_START_PG;
516 ei_status.stop_page = CABLETRON_RX_STOP_PG;
517 ei_status.rmem_start = dev->mem_start;
518 ei_status.rmem_end = dev->mem_start + CABLETRON_RX_STOP_PG*256;
519 } else {
520 ei_status.tx_start_page = WD_START_PG;
521 ei_status.rx_start_page = WD_START_PG + TX_PAGES;
522 ei_status.stop_page = (dev->mem_end - dev->mem_start)/256;
523 ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
524 ei_status.rmem_end = dev->mem_end;
525 }
526
527 /* Fill in model-specific information and functions */
528 switch (type) {
529 case MAC8390_FARALLON:
530 case MAC8390_APPLE:
531 switch (mac8390_testio(dev->mem_start)) {
532 case ACCESS_UNKNOWN:
533 dev_err(&board->dev,
534 "Don't know how to access card memory\n");
535 return -ENODEV;
536
537 case ACCESS_16:
538 /* 16 bit card, register map is reversed */
539 ei_status.reset_8390 = mac8390_no_reset;
540 ei_status.block_input = slow_sane_block_input;
541 ei_status.block_output = slow_sane_block_output;
542 ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
543 ei_status.reg_offset = back4_offsets;
544 break;
545
546 case ACCESS_32:
547 /* 32 bit card, register map is reversed */
548 ei_status.reset_8390 = mac8390_no_reset;
549 ei_status.block_input = sane_block_input;
550 ei_status.block_output = sane_block_output;
551 ei_status.get_8390_hdr = sane_get_8390_hdr;
552 ei_status.reg_offset = back4_offsets;
553 access_bitmode = 1;
554 break;
555 }
556 break;
557
558 case MAC8390_ASANTE:
559 /* Some Asante cards pass the 32 bit test
560 * but overwrite system memory when run at 32 bit.
561 * so we run them all at 16 bit.
562 */
563 ei_status.reset_8390 = mac8390_no_reset;
564 ei_status.block_input = slow_sane_block_input;
565 ei_status.block_output = slow_sane_block_output;
566 ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
567 ei_status.reg_offset = back4_offsets;
568 break;
569
570 case MAC8390_CABLETRON:
571 /* 16 bit card, register map is short forward */
572 ei_status.reset_8390 = mac8390_no_reset;
573 ei_status.block_input = slow_sane_block_input;
574 ei_status.block_output = slow_sane_block_output;
575 ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
576 ei_status.reg_offset = fwrd2_offsets;
577 break;
578
579 case MAC8390_DAYNA:
580 case MAC8390_KINETICS:
581 /* 16 bit memory, register map is forward */
582 /* dayna and similar */
583 ei_status.reset_8390 = mac8390_no_reset;
584 ei_status.block_input = dayna_block_input;
585 ei_status.block_output = dayna_block_output;
586 ei_status.get_8390_hdr = dayna_get_8390_hdr;
587 ei_status.reg_offset = fwrd4_offsets;
588 break;
589
590 case MAC8390_INTERLAN:
591 /* 16 bit memory, register map is forward */
592 ei_status.reset_8390 = interlan_reset;
593 ei_status.block_input = slow_sane_block_input;
594 ei_status.block_output = slow_sane_block_output;
595 ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
596 ei_status.reg_offset = fwrd4_offsets;
597 break;
598
599 default:
600 dev_err(&board->dev, "Unsupported card type\n");
601 return -ENODEV;
602 }
603
604 __NS8390_init(dev, 0);
605
606 /* Good, done, now spit out some messages */
607 dev_info(&board->dev, "%s (type %s)\n", board->name, cardname[type]);
608 dev_info(&board->dev, "MAC %pM, IRQ %d, %d KB shared memory at %#lx, %d-bit access.\n",
609 dev->dev_addr, dev->irq,
610 (unsigned int)(dev->mem_end - dev->mem_start) >> 10,
611 dev->mem_start, access_bitmode ? 32 : 16);
612 return 0;
613 }
614
615 static int mac8390_open(struct net_device *dev)
616 {
617 int err;
618
619 __ei_open(dev);
620 err = request_irq(dev->irq, __ei_interrupt, 0, "8390 Ethernet", dev);
621 if (err)
622 pr_err("%s: unable to get IRQ %d\n", dev->name, dev->irq);
623 return err;
624 }
625
626 static int mac8390_close(struct net_device *dev)
627 {
628 free_irq(dev->irq, dev);
629 __ei_close(dev);
630 return 0;
631 }
632
633 static void mac8390_no_reset(struct net_device *dev)
634 {
635 struct ei_device *ei_local = netdev_priv(dev);
636
637 ei_status.txing = 0;
638 netif_info(ei_local, hw, dev, "reset not supported\n");
639 }
640
641 static void interlan_reset(struct net_device *dev)
642 {
643 unsigned char *target = nubus_slot_addr(IRQ2SLOT(dev->irq));
644 struct ei_device *ei_local = netdev_priv(dev);
645
646 netif_info(ei_local, hw, dev, "Need to reset the NS8390 t=%lu...",
647 jiffies);
648 ei_status.txing = 0;
649 target[0xC0000] = 0;
650 if (netif_msg_hw(ei_local))
651 pr_cont("reset complete\n");
652 }
653
654 /* dayna_memcpy_fromio/dayna_memcpy_toio */
655 /* directly from daynaport.c by Alan Cox */
656 static void dayna_memcpy_fromcard(struct net_device *dev, void *to, int from,
657 int count)
658 {
659 volatile unsigned char *ptr;
660 unsigned char *target = to;
661 from <<= 1; /* word, skip overhead */
662 ptr = (unsigned char *)(dev->mem_start+from);
663 /* Leading byte? */
664 if (from & 2) {
665 *target++ = ptr[-1];
666 ptr += 2;
667 count--;
668 }
669 while (count >= 2) {
670 *(unsigned short *)target = *(unsigned short volatile *)ptr;
671 ptr += 4; /* skip cruft */
672 target += 2;
673 count -= 2;
674 }
675 /* Trailing byte? */
676 if (count)
677 *target = *ptr;
678 }
679
680 static void dayna_memcpy_tocard(struct net_device *dev, int to,
681 const void *from, int count)
682 {
683 volatile unsigned short *ptr;
684 const unsigned char *src = from;
685 to <<= 1; /* word, skip overhead */
686 ptr = (unsigned short *)(dev->mem_start+to);
687 /* Leading byte? */
688 if (to & 2) { /* avoid a byte write (stomps on other data) */
689 ptr[-1] = (ptr[-1]&0xFF00)|*src++;
690 ptr++;
691 count--;
692 }
693 while (count >= 2) {
694 *ptr++ = *(unsigned short *)src; /* Copy and */
695 ptr++; /* skip cruft */
696 src += 2;
697 count -= 2;
698 }
699 /* Trailing byte? */
700 if (count) {
701 /* card doesn't like byte writes */
702 *ptr = (*ptr & 0x00FF) | (*src << 8);
703 }
704 }
705
706 /* sane block input/output */
707 static void sane_get_8390_hdr(struct net_device *dev,
708 struct e8390_pkt_hdr *hdr, int ring_page)
709 {
710 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
711 memcpy_fromio(hdr, (void __iomem *)dev->mem_start + hdr_start, 4);
712 /* Fix endianness */
713 hdr->count = swab16(hdr->count);
714 }
715
716 static void sane_block_input(struct net_device *dev, int count,
717 struct sk_buff *skb, int ring_offset)
718 {
719 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
720 unsigned long xfer_start = xfer_base + dev->mem_start;
721
722 if (xfer_start + count > ei_status.rmem_end) {
723 /* We must wrap the input move. */
724 int semi_count = ei_status.rmem_end - xfer_start;
725 memcpy_fromio(skb->data,
726 (void __iomem *)dev->mem_start + xfer_base,
727 semi_count);
728 count -= semi_count;
729 memcpy_fromio(skb->data + semi_count,
730 (void __iomem *)ei_status.rmem_start, count);
731 } else {
732 memcpy_fromio(skb->data,
733 (void __iomem *)dev->mem_start + xfer_base,
734 count);
735 }
736 }
737
738 static void sane_block_output(struct net_device *dev, int count,
739 const unsigned char *buf, int start_page)
740 {
741 long shmem = (start_page - WD_START_PG)<<8;
742
743 memcpy_toio((void __iomem *)dev->mem_start + shmem, buf, count);
744 }
745
746 /* dayna block input/output */
747 static void dayna_get_8390_hdr(struct net_device *dev,
748 struct e8390_pkt_hdr *hdr, int ring_page)
749 {
750 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
751
752 dayna_memcpy_fromcard(dev, hdr, hdr_start, 4);
753 /* Fix endianness */
754 hdr->count = (hdr->count & 0xFF) << 8 | (hdr->count >> 8);
755 }
756
757 static void dayna_block_input(struct net_device *dev, int count,
758 struct sk_buff *skb, int ring_offset)
759 {
760 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
761 unsigned long xfer_start = xfer_base+dev->mem_start;
762
763 /* Note the offset math is done in card memory space which is word
764 per long onto our space. */
765
766 if (xfer_start + count > ei_status.rmem_end) {
767 /* We must wrap the input move. */
768 int semi_count = ei_status.rmem_end - xfer_start;
769 dayna_memcpy_fromcard(dev, skb->data, xfer_base, semi_count);
770 count -= semi_count;
771 dayna_memcpy_fromcard(dev, skb->data + semi_count,
772 ei_status.rmem_start - dev->mem_start,
773 count);
774 } else {
775 dayna_memcpy_fromcard(dev, skb->data, xfer_base, count);
776 }
777 }
778
779 static void dayna_block_output(struct net_device *dev, int count,
780 const unsigned char *buf,
781 int start_page)
782 {
783 long shmem = (start_page - WD_START_PG)<<8;
784
785 dayna_memcpy_tocard(dev, shmem, buf, count);
786 }
787
788 /* Cabletron block I/O */
789 static void slow_sane_get_8390_hdr(struct net_device *dev,
790 struct e8390_pkt_hdr *hdr,
791 int ring_page)
792 {
793 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
794 word_memcpy_fromcard(hdr, dev->mem_start + hdr_start, 4);
795 /* Register endianism - fix here rather than 8390.c */
796 hdr->count = (hdr->count&0xFF)<<8|(hdr->count>>8);
797 }
798
799 static void slow_sane_block_input(struct net_device *dev, int count,
800 struct sk_buff *skb, int ring_offset)
801 {
802 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
803 unsigned long xfer_start = xfer_base+dev->mem_start;
804
805 if (xfer_start + count > ei_status.rmem_end) {
806 /* We must wrap the input move. */
807 int semi_count = ei_status.rmem_end - xfer_start;
808 word_memcpy_fromcard(skb->data, dev->mem_start + xfer_base,
809 semi_count);
810 count -= semi_count;
811 word_memcpy_fromcard(skb->data + semi_count,
812 ei_status.rmem_start, count);
813 } else {
814 word_memcpy_fromcard(skb->data, dev->mem_start + xfer_base,
815 count);
816 }
817 }
818
819 static void slow_sane_block_output(struct net_device *dev, int count,
820 const unsigned char *buf, int start_page)
821 {
822 long shmem = (start_page - WD_START_PG)<<8;
823
824 word_memcpy_tocard(dev->mem_start + shmem, buf, count);
825 }
826
827 static void word_memcpy_tocard(unsigned long tp, const void *fp, int count)
828 {
829 volatile unsigned short *to = (void *)tp;
830 const unsigned short *from = fp;
831
832 count++;
833 count /= 2;
834
835 while (count--)
836 *to++ = *from++;
837 }
838
839 static void word_memcpy_fromcard(void *tp, unsigned long fp, int count)
840 {
841 unsigned short *to = tp;
842 const volatile unsigned short *from = (const void *)fp;
843
844 count++;
845 count /= 2;
846
847 while (count--)
848 *to++ = *from++;
849 }
850
851
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