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Merge branch 'sched/urgent'
[linux-2.6/x86.git] / drivers / net / mac8390.c
blobf84f5e6ededbe168173644d842b7b9c26ef21911
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/system.h>
41 #include <asm/dma.h>
42 #include <asm/hwtest.h>
43 #include <asm/macints.h>
44
45 static char version[] =
46 "v0.4 2001-05-15 David Huggins-Daines <dhd@debian.org> and others\n";
47
48 #define EI_SHIFT(x) (ei_local->reg_offset[x])
49 #define ei_inb(port) in_8(port)
50 #define ei_outb(val, port) out_8(port, val)
51 #define ei_inb_p(port) in_8(port)
52 #define ei_outb_p(val, port) out_8(port, val)
53
54 #include "lib8390.c"
55
56 #define WD_START_PG 0x00 /* First page of TX buffer */
57 #define CABLETRON_RX_START_PG 0x00 /* First page of RX buffer */
58 #define CABLETRON_RX_STOP_PG 0x30 /* Last page +1 of RX ring */
59 #define CABLETRON_TX_START_PG CABLETRON_RX_STOP_PG
60 /* First page of TX buffer */
61
62 /*
63 * Unfortunately it seems we have to hardcode these for the moment
64 * Shouldn't the card know about this?
65 * Does anyone know where to read it off the card?
66 * Do we trust the data provided by the card?
67 */
68
69 #define DAYNA_8390_BASE 0x80000
70 #define DAYNA_8390_MEM 0x00000
71
72 #define CABLETRON_8390_BASE 0x90000
73 #define CABLETRON_8390_MEM 0x00000
74
75 #define INTERLAN_8390_BASE 0xE0000
76 #define INTERLAN_8390_MEM 0xD0000
77
78 enum mac8390_type {
79 MAC8390_NONE = -1,
80 MAC8390_APPLE,
81 MAC8390_ASANTE,
82 MAC8390_FARALLON,
83 MAC8390_CABLETRON,
84 MAC8390_DAYNA,
85 MAC8390_INTERLAN,
86 MAC8390_KINETICS,
87 };
88
89 static const char *cardname[] = {
90 "apple",
91 "asante",
92 "farallon",
93 "cabletron",
94 "dayna",
95 "interlan",
96 "kinetics",
97 };
98
99 static const int word16[] = {
100 1, /* apple */
101 1, /* asante */
102 1, /* farallon */
103 1, /* cabletron */
104 0, /* dayna */
105 1, /* interlan */
106 0, /* kinetics */
107 };
108
109 /* on which cards do we use NuBus resources? */
110 static const int useresources[] = {
111 1, /* apple */
112 1, /* asante */
113 1, /* farallon */
114 0, /* cabletron */
115 0, /* dayna */
116 0, /* interlan */
117 0, /* kinetics */
118 };
119
120 enum mac8390_access {
121 ACCESS_UNKNOWN = 0,
122 ACCESS_32,
123 ACCESS_16,
124 };
125
126 extern int mac8390_memtest(struct net_device *dev);
127 static int mac8390_initdev(struct net_device *dev, struct nubus_dev *ndev,
128 enum mac8390_type type);
129
130 static int mac8390_open(struct net_device *dev);
131 static int mac8390_close(struct net_device *dev);
132 static void mac8390_no_reset(struct net_device *dev);
133 static void interlan_reset(struct net_device *dev);
134
135 /* Sane (32-bit chunk memory read/write) - Some Farallon and Apple do this*/
136 static void sane_get_8390_hdr(struct net_device *dev,
137 struct e8390_pkt_hdr *hdr, int ring_page);
138 static void sane_block_input(struct net_device *dev, int count,
139 struct sk_buff *skb, int ring_offset);
140 static void sane_block_output(struct net_device *dev, int count,
141 const unsigned char *buf, const int start_page);
142
143 /* dayna_memcpy to and from card */
144 static void dayna_memcpy_fromcard(struct net_device *dev, void *to,
145 int from, int count);
146 static void dayna_memcpy_tocard(struct net_device *dev, int to,
147 const void *from, int count);
148
149 /* Dayna - Dayna/Kinetics use this */
150 static void dayna_get_8390_hdr(struct net_device *dev,
151 struct e8390_pkt_hdr *hdr, int ring_page);
152 static void dayna_block_input(struct net_device *dev, int count,
153 struct sk_buff *skb, int ring_offset);
154 static void dayna_block_output(struct net_device *dev, int count,
155 const unsigned char *buf, int start_page);
156
157 #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
158 #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
159
160 #define memcmp_withio(a, b, c) memcmp((a), (void *)(b), (c))
161
162 /* Slow Sane (16-bit chunk memory read/write) Cabletron uses this */
163 static void slow_sane_get_8390_hdr(struct net_device *dev,
164 struct e8390_pkt_hdr *hdr, int ring_page);
165 static void slow_sane_block_input(struct net_device *dev, int count,
166 struct sk_buff *skb, int ring_offset);
167 static void slow_sane_block_output(struct net_device *dev, int count,
168 const unsigned char *buf, int start_page);
169 static void word_memcpy_tocard(unsigned long tp, const void *fp, int count);
170 static void word_memcpy_fromcard(void *tp, unsigned long fp, int count);
171
172 static enum mac8390_type __init mac8390_ident(struct nubus_dev *dev)
173 {
174 switch (dev->dr_sw) {
175 case NUBUS_DRSW_3COM:
176 switch (dev->dr_hw) {
177 case NUBUS_DRHW_APPLE_SONIC_NB:
178 case NUBUS_DRHW_APPLE_SONIC_LC:
179 case NUBUS_DRHW_SONNET:
180 return MAC8390_NONE;
181 break;
182 default:
183 return MAC8390_APPLE;
184 break;
185 }
186 break;
187
188 case NUBUS_DRSW_APPLE:
189 switch (dev->dr_hw) {
190 case NUBUS_DRHW_ASANTE_LC:
191 return MAC8390_NONE;
192 break;
193 case NUBUS_DRHW_CABLETRON:
194 return MAC8390_CABLETRON;
195 break;
196 default:
197 return MAC8390_APPLE;
198 break;
199 }
200 break;
201
202 case NUBUS_DRSW_ASANTE:
203 return MAC8390_ASANTE;
204 break;
205
206 case NUBUS_DRSW_TECHWORKS:
207 case NUBUS_DRSW_DAYNA2:
208 case NUBUS_DRSW_DAYNA_LC:
209 if (dev->dr_hw == NUBUS_DRHW_CABLETRON)
210 return MAC8390_CABLETRON;
211 else
212 return MAC8390_APPLE;
213 break;
214
215 case NUBUS_DRSW_FARALLON:
216 return MAC8390_FARALLON;
217 break;
218
219 case NUBUS_DRSW_KINETICS:
220 switch (dev->dr_hw) {
221 case NUBUS_DRHW_INTERLAN:
222 return MAC8390_INTERLAN;
223 break;
224 default:
225 return MAC8390_KINETICS;
226 break;
227 }
228 break;
229
230 case NUBUS_DRSW_DAYNA:
231 /*
232 * These correspond to Dayna Sonic cards
233 * which use the macsonic driver
234 */
235 if (dev->dr_hw == NUBUS_DRHW_SMC9194 ||
236 dev->dr_hw == NUBUS_DRHW_INTERLAN)
237 return MAC8390_NONE;
238 else
239 return MAC8390_DAYNA;
240 break;
241 }
242 return MAC8390_NONE;
243 }
244
245 static enum mac8390_access __init mac8390_testio(volatile unsigned long membase)
246 {
247 unsigned long outdata = 0xA5A0B5B0;
248 unsigned long indata = 0x00000000;
249 /* Try writing 32 bits */
250 memcpy_toio(membase, &outdata, 4);
251 /* Now compare them */
252 if (memcmp_withio(&outdata, membase, 4) == 0)
253 return ACCESS_32;
254 /* Write 16 bit output */
255 word_memcpy_tocard(membase, &outdata, 4);
256 /* Now read it back */
257 word_memcpy_fromcard(&indata, membase, 4);
258 if (outdata == indata)
259 return ACCESS_16;
260 return ACCESS_UNKNOWN;
261 }
262
263 static int __init mac8390_memsize(unsigned long membase)
264 {
265 unsigned long flags;
266 int i, j;
267
268 local_irq_save(flags);
269 /* Check up to 32K in 4K increments */
270 for (i = 0; i < 8; i++) {
271 volatile unsigned short *m = (unsigned short *)(membase + (i * 0x1000));
272
273 /* Unwriteable - we have a fully decoded card and the
274 RAM end located */
275 if (hwreg_present(m) == 0)
276 break;
277
278 /* write a distinctive byte */
279 *m = 0xA5A0 | i;
280 /* check that we read back what we wrote */
281 if (*m != (0xA5A0 | i))
282 break;
283
284 /* check for partial decode and wrap */
285 for (j = 0; j < i; j++) {
286 volatile unsigned short *p = (unsigned short *)(membase + (j * 0x1000));
287 if (*p != (0xA5A0 | j))
288 break;
289 }
290 }
291 local_irq_restore(flags);
292 /*
293 * in any case, we stopped once we tried one block too many,
294 * or once we reached 32K
295 */
296 return i * 0x1000;
297 }
298
299 static bool __init mac8390_init(struct net_device *dev, struct nubus_dev *ndev,
300 enum mac8390_type cardtype)
301 {
302 struct nubus_dir dir;
303 struct nubus_dirent ent;
304 int offset;
305 volatile unsigned short *i;
306
307 printk_once(KERN_INFO pr_fmt("%s"), version);
308
309 dev->irq = SLOT2IRQ(ndev->board->slot);
310 /* This is getting to be a habit */
311 dev->base_addr = (ndev->board->slot_addr |
312 ((ndev->board->slot & 0xf) << 20));
313
314 /*
315 * Get some Nubus info - we will trust the card's idea
316 * of where its memory and registers are.
317 */
318
319 if (nubus_get_func_dir(ndev, &dir) == -1) {
320 pr_err("%s: Unable to get Nubus functional directory for slot %X!\n",
321 dev->name, ndev->board->slot);
322 return false;
323 }
324
325 /* Get the MAC address */
326 if (nubus_find_rsrc(&dir, NUBUS_RESID_MAC_ADDRESS, &ent) == -1) {
327 pr_info("%s: Couldn't get MAC address!\n", dev->name);
328 return false;
329 }
330
331 nubus_get_rsrc_mem(dev->dev_addr, &ent, 6);
332
333 if (useresources[cardtype] == 1) {
334 nubus_rewinddir(&dir);
335 if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_BASEOS,
336 &ent) == -1) {
337 pr_err("%s: Memory offset resource for slot %X not found!\n",
338 dev->name, ndev->board->slot);
339 return false;
340 }
341 nubus_get_rsrc_mem(&offset, &ent, 4);
342 dev->mem_start = dev->base_addr + offset;
343 /* yes, this is how the Apple driver does it */
344 dev->base_addr = dev->mem_start + 0x10000;
345 nubus_rewinddir(&dir);
346 if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_LENGTH,
347 &ent) == -1) {
348 pr_info("%s: Memory length resource for slot %X not found, probing\n",
349 dev->name, ndev->board->slot);
350 offset = mac8390_memsize(dev->mem_start);
351 } else {
352 nubus_get_rsrc_mem(&offset, &ent, 4);
353 }
354 dev->mem_end = dev->mem_start + offset;
355 } else {
356 switch (cardtype) {
357 case MAC8390_KINETICS:
358 case MAC8390_DAYNA: /* it's the same */
359 dev->base_addr = (int)(ndev->board->slot_addr +
360 DAYNA_8390_BASE);
361 dev->mem_start = (int)(ndev->board->slot_addr +
362 DAYNA_8390_MEM);
363 dev->mem_end = dev->mem_start +
364 mac8390_memsize(dev->mem_start);
365 break;
366 case MAC8390_INTERLAN:
367 dev->base_addr = (int)(ndev->board->slot_addr +
368 INTERLAN_8390_BASE);
369 dev->mem_start = (int)(ndev->board->slot_addr +
370 INTERLAN_8390_MEM);
371 dev->mem_end = dev->mem_start +
372 mac8390_memsize(dev->mem_start);
373 break;
374 case MAC8390_CABLETRON:
375 dev->base_addr = (int)(ndev->board->slot_addr +
376 CABLETRON_8390_BASE);
377 dev->mem_start = (int)(ndev->board->slot_addr +
378 CABLETRON_8390_MEM);
379 /* The base address is unreadable if 0x00
380 * has been written to the command register
381 * Reset the chip by writing E8390_NODMA +
382 * E8390_PAGE0 + E8390_STOP just to be
383 * sure
384 */
385 i = (void *)dev->base_addr;
386 *i = 0x21;
387 dev->mem_end = dev->mem_start +
388 mac8390_memsize(dev->mem_start);
389 break;
390
391 default:
392 pr_err("Card type %s is unsupported, sorry\n",
393 ndev->board->name);
394 return false;
395 }
396 }
397
398 return true;
399 }
400
401 struct net_device * __init mac8390_probe(int unit)
402 {
403 struct net_device *dev;
404 struct nubus_dev *ndev = NULL;
405 int err = -ENODEV;
406
407 static unsigned int slots;
408
409 enum mac8390_type cardtype;
410
411 /* probably should check for Nubus instead */
412
413 if (!MACH_IS_MAC)
414 return ERR_PTR(-ENODEV);
415
416 dev = ____alloc_ei_netdev(0);
417 if (!dev)
418 return ERR_PTR(-ENOMEM);
419
420 if (unit >= 0)
421 sprintf(dev->name, "eth%d", unit);
422
423 while ((ndev = nubus_find_type(NUBUS_CAT_NETWORK, NUBUS_TYPE_ETHERNET,
424 ndev))) {
425 /* Have we seen it already? */
426 if (slots & (1 << ndev->board->slot))
427 continue;
428 slots |= 1 << ndev->board->slot;
429
430 cardtype = mac8390_ident(ndev);
431 if (cardtype == MAC8390_NONE)
432 continue;
433
434 if (!mac8390_init(dev, ndev, cardtype))
435 continue;
436
437 /* Do the nasty 8390 stuff */
438 if (!mac8390_initdev(dev, ndev, cardtype))
439 break;
440 }
441
442 if (!ndev)
443 goto out;
444 err = register_netdev(dev);
445 if (err)
446 goto out;
447 return dev;
448
449 out:
450 free_netdev(dev);
451 return ERR_PTR(err);
452 }
453
454 #ifdef MODULE
455 MODULE_AUTHOR("David Huggins-Daines <dhd@debian.org> and others");
456 MODULE_DESCRIPTION("Macintosh NS8390-based Nubus Ethernet driver");
457 MODULE_LICENSE("GPL");
458
459 /* overkill, of course */
460 static struct net_device *dev_mac8390[15];
461 int init_module(void)
462 {
463 int i;
464 for (i = 0; i < 15; i++) {
465 struct net_device *dev = mac8390_probe(-1);
466 if (IS_ERR(dev))
467 break;
468 dev_mac890[i] = dev;
469 }
470 if (!i) {
471 pr_notice("No useable cards found, driver NOT installed.\n");
472 return -ENODEV;
473 }
474 return 0;
475 }
476
477 void cleanup_module(void)
478 {
479 int i;
480 for (i = 0; i < 15; i++) {
481 struct net_device *dev = dev_mac890[i];
482 if (dev) {
483 unregister_netdev(dev);
484 free_netdev(dev);
485 }
486 }
487 }
488
489 #endif /* MODULE */
490
491 static const struct net_device_ops mac8390_netdev_ops = {
492 .ndo_open = mac8390_open,
493 .ndo_stop = mac8390_close,
494 .ndo_start_xmit = __ei_start_xmit,
495 .ndo_tx_timeout = __ei_tx_timeout,
496 .ndo_get_stats = __ei_get_stats,
497 .ndo_set_multicast_list = __ei_set_multicast_list,
498 .ndo_validate_addr = eth_validate_addr,
499 .ndo_set_mac_address = eth_mac_addr,
500 .ndo_change_mtu = eth_change_mtu,
501 #ifdef CONFIG_NET_POLL_CONTROLLER
502 .ndo_poll_controller = __ei_poll,
503 #endif
504 };
505
506 static int __init mac8390_initdev(struct net_device *dev,
507 struct nubus_dev *ndev,
508 enum mac8390_type type)
509 {
510 static u32 fwrd4_offsets[16] = {
511 0, 4, 8, 12,
512 16, 20, 24, 28,
513 32, 36, 40, 44,
514 48, 52, 56, 60
515 };
516 static u32 back4_offsets[16] = {
517 60, 56, 52, 48,
518 44, 40, 36, 32,
519 28, 24, 20, 16,
520 12, 8, 4, 0
521 };
522 static u32 fwrd2_offsets[16] = {
523 0, 2, 4, 6,
524 8, 10, 12, 14,
525 16, 18, 20, 22,
526 24, 26, 28, 30
527 };
528
529 int access_bitmode = 0;
530
531 /* Now fill in our stuff */
532 dev->netdev_ops = &mac8390_netdev_ops;
533
534 /* GAR, ei_status is actually a macro even though it looks global */
535 ei_status.name = cardname[type];
536 ei_status.word16 = word16[type];
537
538 /* Cabletron's TX/RX buffers are backwards */
539 if (type == MAC8390_CABLETRON) {
540 ei_status.tx_start_page = CABLETRON_TX_START_PG;
541 ei_status.rx_start_page = CABLETRON_RX_START_PG;
542 ei_status.stop_page = CABLETRON_RX_STOP_PG;
543 ei_status.rmem_start = dev->mem_start;
544 ei_status.rmem_end = dev->mem_start + CABLETRON_RX_STOP_PG*256;
545 } else {
546 ei_status.tx_start_page = WD_START_PG;
547 ei_status.rx_start_page = WD_START_PG + TX_PAGES;
548 ei_status.stop_page = (dev->mem_end - dev->mem_start)/256;
549 ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
550 ei_status.rmem_end = dev->mem_end;
551 }
552
553 /* Fill in model-specific information and functions */
554 switch (type) {
555 case MAC8390_FARALLON:
556 case MAC8390_APPLE:
557 switch (mac8390_testio(dev->mem_start)) {
558 case ACCESS_UNKNOWN:
559 pr_err("Don't know how to access card memory!\n");
560 return -ENODEV;
561 break;
562
563 case ACCESS_16:
564 /* 16 bit card, register map is reversed */
565 ei_status.reset_8390 = mac8390_no_reset;
566 ei_status.block_input = slow_sane_block_input;
567 ei_status.block_output = slow_sane_block_output;
568 ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
569 ei_status.reg_offset = back4_offsets;
570 break;
571
572 case ACCESS_32:
573 /* 32 bit card, register map is reversed */
574 ei_status.reset_8390 = mac8390_no_reset;
575 ei_status.block_input = sane_block_input;
576 ei_status.block_output = sane_block_output;
577 ei_status.get_8390_hdr = sane_get_8390_hdr;
578 ei_status.reg_offset = back4_offsets;
579 access_bitmode = 1;
580 break;
581 }
582 break;
583
584 case MAC8390_ASANTE:
585 /* Some Asante cards pass the 32 bit test
586 * but overwrite system memory when run at 32 bit.
587 * so we run them all at 16 bit.
588 */
589 ei_status.reset_8390 = mac8390_no_reset;
590 ei_status.block_input = slow_sane_block_input;
591 ei_status.block_output = slow_sane_block_output;
592 ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
593 ei_status.reg_offset = back4_offsets;
594 break;
595
596 case MAC8390_CABLETRON:
597 /* 16 bit card, register map is short forward */
598 ei_status.reset_8390 = mac8390_no_reset;
599 ei_status.block_input = slow_sane_block_input;
600 ei_status.block_output = slow_sane_block_output;
601 ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
602 ei_status.reg_offset = fwrd2_offsets;
603 break;
604
605 case MAC8390_DAYNA:
606 case MAC8390_KINETICS:
607 /* 16 bit memory, register map is forward */
608 /* dayna and similar */
609 ei_status.reset_8390 = mac8390_no_reset;
610 ei_status.block_input = dayna_block_input;
611 ei_status.block_output = dayna_block_output;
612 ei_status.get_8390_hdr = dayna_get_8390_hdr;
613 ei_status.reg_offset = fwrd4_offsets;
614 break;
615
616 case MAC8390_INTERLAN:
617 /* 16 bit memory, register map is forward */
618 ei_status.reset_8390 = interlan_reset;
619 ei_status.block_input = slow_sane_block_input;
620 ei_status.block_output = slow_sane_block_output;
621 ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
622 ei_status.reg_offset = fwrd4_offsets;
623 break;
624
625 default:
626 pr_err("Card type %s is unsupported, sorry\n",
627 ndev->board->name);
628 return -ENODEV;
629 }
630
631 __NS8390_init(dev, 0);
632
633 /* Good, done, now spit out some messages */
634 pr_info("%s: %s in slot %X (type %s)\n",
635 dev->name, ndev->board->name, ndev->board->slot,
636 cardname[type]);
637 pr_info("MAC %pM IRQ %d, %d KB shared memory at %#lx, %d-bit access.\n",
638 dev->dev_addr, dev->irq,
639 (unsigned int)(dev->mem_end - dev->mem_start) >> 10,
640 dev->mem_start, access_bitmode ? 32 : 16);
641 return 0;
642 }
643
644 static int mac8390_open(struct net_device *dev)
645 {
646 int err;
647
648 __ei_open(dev);
649 err = request_irq(dev->irq, __ei_interrupt, 0, "8390 Ethernet", dev);
650 if (err)
651 pr_err("%s: unable to get IRQ %d\n", dev->name, dev->irq);
652 return err;
653 }
654
655 static int mac8390_close(struct net_device *dev)
656 {
657 free_irq(dev->irq, dev);
658 __ei_close(dev);
659 return 0;
660 }
661
662 static void mac8390_no_reset(struct net_device *dev)
663 {
664 ei_status.txing = 0;
665 if (ei_debug > 1)
666 pr_info("reset not supported\n");
667 }
668
669 static void interlan_reset(struct net_device *dev)
670 {
671 unsigned char *target = nubus_slot_addr(IRQ2SLOT(dev->irq));
672 if (ei_debug > 1)
673 pr_info("Need to reset the NS8390 t=%lu...", jiffies);
674 ei_status.txing = 0;
675 target[0xC0000] = 0;
676 if (ei_debug > 1)
677 pr_cont("reset complete\n");
678 }
679
680 /* dayna_memcpy_fromio/dayna_memcpy_toio */
681 /* directly from daynaport.c by Alan Cox */
682 static void dayna_memcpy_fromcard(struct net_device *dev, void *to, int from,
683 int count)
684 {
685 volatile unsigned char *ptr;
686 unsigned char *target = to;
687 from <<= 1; /* word, skip overhead */
688 ptr = (unsigned char *)(dev->mem_start+from);
689 /* Leading byte? */
690 if (from & 2) {
691 *target++ = ptr[-1];
692 ptr += 2;
693 count--;
694 }
695 while (count >= 2) {
696 *(unsigned short *)target = *(unsigned short volatile *)ptr;
697 ptr += 4; /* skip cruft */
698 target += 2;
699 count -= 2;
700 }
701 /* Trailing byte? */
702 if (count)
703 *target = *ptr;
704 }
705
706 static void dayna_memcpy_tocard(struct net_device *dev, int to,
707 const void *from, int count)
708 {
709 volatile unsigned short *ptr;
710 const unsigned char *src = from;
711 to <<= 1; /* word, skip overhead */
712 ptr = (unsigned short *)(dev->mem_start+to);
713 /* Leading byte? */
714 if (to & 2) { /* avoid a byte write (stomps on other data) */
715 ptr[-1] = (ptr[-1]&0xFF00)|*src++;
716 ptr++;
717 count--;
718 }
719 while (count >= 2) {
720 *ptr++ = *(unsigned short *)src; /* Copy and */
721 ptr++; /* skip cruft */
722 src += 2;
723 count -= 2;
724 }
725 /* Trailing byte? */
726 if (count) {
727 /* card doesn't like byte writes */
728 *ptr = (*ptr & 0x00FF) | (*src << 8);
729 }
730 }
731
732 /* sane block input/output */
733 static void sane_get_8390_hdr(struct net_device *dev,
734 struct e8390_pkt_hdr *hdr, int ring_page)
735 {
736 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
737 memcpy_fromio(hdr, dev->mem_start + hdr_start, 4);
738 /* Fix endianness */
739 hdr->count = swab16(hdr->count);
740 }
741
742 static void sane_block_input(struct net_device *dev, int count,
743 struct sk_buff *skb, int ring_offset)
744 {
745 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
746 unsigned long xfer_start = xfer_base + dev->mem_start;
747
748 if (xfer_start + count > ei_status.rmem_end) {
749 /* We must wrap the input move. */
750 int semi_count = ei_status.rmem_end - xfer_start;
751 memcpy_fromio(skb->data, dev->mem_start + xfer_base,
752 semi_count);
753 count -= semi_count;
754 memcpy_fromio(skb->data + semi_count, ei_status.rmem_start,
755 count);
756 } else {
757 memcpy_fromio(skb->data, dev->mem_start + xfer_base, count);
758 }
759 }
760
761 static void sane_block_output(struct net_device *dev, int count,
762 const unsigned char *buf, int start_page)
763 {
764 long shmem = (start_page - WD_START_PG)<<8;
765
766 memcpy_toio(dev->mem_start + shmem, buf, count);
767 }
768
769 /* dayna block input/output */
770 static void dayna_get_8390_hdr(struct net_device *dev,
771 struct e8390_pkt_hdr *hdr, int ring_page)
772 {
773 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
774
775 dayna_memcpy_fromcard(dev, hdr, hdr_start, 4);
776 /* Fix endianness */
777 hdr->count = (hdr->count & 0xFF) << 8 | (hdr->count >> 8);
778 }
779
780 static void dayna_block_input(struct net_device *dev, int count,
781 struct sk_buff *skb, int ring_offset)
782 {
783 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
784 unsigned long xfer_start = xfer_base+dev->mem_start;
785
786 /* Note the offset math is done in card memory space which is word
787 per long onto our space. */
788
789 if (xfer_start + count > ei_status.rmem_end) {
790 /* We must wrap the input move. */
791 int semi_count = ei_status.rmem_end - xfer_start;
792 dayna_memcpy_fromcard(dev, skb->data, xfer_base, semi_count);
793 count -= semi_count;
794 dayna_memcpy_fromcard(dev, skb->data + semi_count,
795 ei_status.rmem_start - dev->mem_start,
796 count);
797 } else {
798 dayna_memcpy_fromcard(dev, skb->data, xfer_base, count);
799 }
800 }
801
802 static void dayna_block_output(struct net_device *dev, int count,
803 const unsigned char *buf,
804 int start_page)
805 {
806 long shmem = (start_page - WD_START_PG)<<8;
807
808 dayna_memcpy_tocard(dev, shmem, buf, count);
809 }
810
811 /* Cabletron block I/O */
812 static void slow_sane_get_8390_hdr(struct net_device *dev,
813 struct e8390_pkt_hdr *hdr,
814 int ring_page)
815 {
816 unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
817 word_memcpy_fromcard(hdr, dev->mem_start + hdr_start, 4);
818 /* Register endianism - fix here rather than 8390.c */
819 hdr->count = (hdr->count&0xFF)<<8|(hdr->count>>8);
820 }
821
822 static void slow_sane_block_input(struct net_device *dev, int count,
823 struct sk_buff *skb, int ring_offset)
824 {
825 unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
826 unsigned long xfer_start = xfer_base+dev->mem_start;
827
828 if (xfer_start + count > ei_status.rmem_end) {
829 /* We must wrap the input move. */
830 int semi_count = ei_status.rmem_end - xfer_start;
831 word_memcpy_fromcard(skb->data, dev->mem_start + xfer_base,
832 semi_count);
833 count -= semi_count;
834 word_memcpy_fromcard(skb->data + semi_count,
835 ei_status.rmem_start, count);
836 } else {
837 word_memcpy_fromcard(skb->data, dev->mem_start + xfer_base,
838 count);
839 }
840 }
841
842 static void slow_sane_block_output(struct net_device *dev, int count,
843 const unsigned char *buf, int start_page)
844 {
845 long shmem = (start_page - WD_START_PG)<<8;
846
847 word_memcpy_tocard(dev->mem_start + shmem, buf, count);
848 }
849
850 static void word_memcpy_tocard(unsigned long tp, const void *fp, int count)
851 {
852 volatile unsigned short *to = (void *)tp;
853 const unsigned short *from = fp;
854
855 count++;
856 count /= 2;
857
858 while (count--)
859 *to++ = *from++;
860 }
861
862 static void word_memcpy_fromcard(void *tp, unsigned long fp, int count)
863 {
864 unsigned short *to = tp;
865 const volatile unsigned short *from = (const void *)fp;
866
867 count++;
868 count /= 2;
869
870 while (count--)
871 *to++ = *from++;
872 }
873
874
x86 "subsystem" repository