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mac8390.c
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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  [email protected] */
12 /* 2000-04-04: support added for Dayna2 by [email protected] */
13 /* 2001-04-18: support for DaynaPort E/LC-M by [email protected] */
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 [email protected] */
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 <[email protected]> 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_dev *ndev,
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 memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
157 #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
158 
159 #define memcmp_withio(a, b, c) memcmp((a), (void *)(b), (c))
160 
161 /* Slow Sane (16-bit chunk memory read/write) Cabletron uses this */
162 static void slow_sane_get_8390_hdr(struct net_device *dev,
163  struct e8390_pkt_hdr *hdr, int ring_page);
164 static void slow_sane_block_input(struct net_device *dev, int count,
165  struct sk_buff *skb, int ring_offset);
166 static void slow_sane_block_output(struct net_device *dev, int count,
167  const unsigned char *buf, int start_page);
168 static void word_memcpy_tocard(unsigned long tp, const void *fp, int count);
169 static void word_memcpy_fromcard(void *tp, unsigned long fp, int count);
170 
171 static enum mac8390_type __init mac8390_ident(struct nubus_dev *dev)
172 {
173  switch (dev->dr_sw) {
174  case NUBUS_DRSW_3COM:
175  switch (dev->dr_hw) {
176  case NUBUS_DRHW_APPLE_SONIC_NB:
177  case NUBUS_DRHW_APPLE_SONIC_LC:
178  case NUBUS_DRHW_SONNET:
179  return MAC8390_NONE;
180  break;
181  default:
182  return MAC8390_APPLE;
183  break;
184  }
185  break;
186 
187  case NUBUS_DRSW_APPLE:
188  switch (dev->dr_hw) {
189  case NUBUS_DRHW_ASANTE_LC:
190  return MAC8390_NONE;
191  break;
192  case NUBUS_DRHW_CABLETRON:
193  return MAC8390_CABLETRON;
194  break;
195  default:
196  return MAC8390_APPLE;
197  break;
198  }
199  break;
200 
201  case NUBUS_DRSW_ASANTE:
202  return MAC8390_ASANTE;
203  break;
204 
205  case NUBUS_DRSW_TECHWORKS:
206  case NUBUS_DRSW_DAYNA2:
207  case NUBUS_DRSW_DAYNA_LC:
208  if (dev->dr_hw == NUBUS_DRHW_CABLETRON)
209  return MAC8390_CABLETRON;
210  else
211  return MAC8390_APPLE;
212  break;
213 
214  case NUBUS_DRSW_FARALLON:
215  return MAC8390_FARALLON;
216  break;
217 
218  case NUBUS_DRSW_KINETICS:
219  switch (dev->dr_hw) {
220  case NUBUS_DRHW_INTERLAN:
221  return MAC8390_INTERLAN;
222  break;
223  default:
224  return MAC8390_KINETICS;
225  break;
226  }
227  break;
228 
229  case NUBUS_DRSW_DAYNA:
230  /*
231  * These correspond to Dayna Sonic cards
232  * which use the macsonic driver
233  */
234  if (dev->dr_hw == NUBUS_DRHW_SMC9194 ||
235  dev->dr_hw == NUBUS_DRHW_INTERLAN)
236  return MAC8390_NONE;
237  else
238  return MAC8390_DAYNA;
239  break;
240  }
241  return MAC8390_NONE;
242 }
243 
244 static enum mac8390_access __init mac8390_testio(volatile unsigned long membase)
245 {
246  unsigned long outdata = 0xA5A0B5B0;
247  unsigned long indata = 0x00000000;
248  /* Try writing 32 bits */
249  memcpy_toio(membase, &outdata, 4);
250  /* Now compare them */
251  if (memcmp_withio(&outdata, membase, 4) == 0)
252  return ACCESS_32;
253  /* Write 16 bit output */
254  word_memcpy_tocard(membase, &outdata, 4);
255  /* Now read it back */
256  word_memcpy_fromcard(&indata, membase, 4);
257  if (outdata == indata)
258  return ACCESS_16;
259  return ACCESS_UNKNOWN;
260 }
261 
262 static int __init mac8390_memsize(unsigned long membase)
263 {
264  unsigned long flags;
265  int i, j;
266 
267  local_irq_save(flags);
268  /* Check up to 32K in 4K increments */
269  for (i = 0; i < 8; i++) {
270  volatile unsigned short *m = (unsigned short *)(membase + (i * 0x1000));
271 
272  /* Unwriteable - we have a fully decoded card and the
273  RAM end located */
274  if (hwreg_present(m) == 0)
275  break;
276 
277  /* write a distinctive byte */
278  *m = 0xA5A0 | i;
279  /* check that we read back what we wrote */
280  if (*m != (0xA5A0 | i))
281  break;
282 
283  /* check for partial decode and wrap */
284  for (j = 0; j < i; j++) {
285  volatile unsigned short *p = (unsigned short *)(membase + (j * 0x1000));
286  if (*p != (0xA5A0 | j))
287  break;
288  }
289  }
290  local_irq_restore(flags);
291  /*
292  * in any case, we stopped once we tried one block too many,
293  * or once we reached 32K
294  */
295  return i * 0x1000;
296 }
297 
298 static bool __init mac8390_init(struct net_device *dev, struct nubus_dev *ndev,
299  enum mac8390_type cardtype)
300 {
301  struct nubus_dir dir;
302  struct nubus_dirent ent;
303  int offset;
304  volatile unsigned short *i;
305 
306  printk_once(KERN_INFO pr_fmt("%s"), version);
307 
308  dev->irq = SLOT2IRQ(ndev->board->slot);
309  /* This is getting to be a habit */
310  dev->base_addr = (ndev->board->slot_addr |
311  ((ndev->board->slot & 0xf) << 20));
312 
313  /*
314  * Get some Nubus info - we will trust the card's idea
315  * of where its memory and registers are.
316  */
317 
318  if (nubus_get_func_dir(ndev, &dir) == -1) {
319  pr_err("%s: Unable to get Nubus functional directory for slot %X!\n",
320  dev->name, ndev->board->slot);
321  return false;
322  }
323 
324  /* Get the MAC address */
325  if (nubus_find_rsrc(&dir, NUBUS_RESID_MAC_ADDRESS, &ent) == -1) {
326  pr_info("%s: Couldn't get MAC address!\n", dev->name);
327  return false;
328  }
329 
330  nubus_get_rsrc_mem(dev->dev_addr, &ent, 6);
331 
332  if (useresources[cardtype] == 1) {
333  nubus_rewinddir(&dir);
334  if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_BASEOS,
335  &ent) == -1) {
336  pr_err("%s: Memory offset resource for slot %X not found!\n",
337  dev->name, ndev->board->slot);
338  return false;
339  }
340  nubus_get_rsrc_mem(&offset, &ent, 4);
341  dev->mem_start = dev->base_addr + offset;
342  /* yes, this is how the Apple driver does it */
343  dev->base_addr = dev->mem_start + 0x10000;
344  nubus_rewinddir(&dir);
345  if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_LENGTH,
346  &ent) == -1) {
347  pr_info("%s: Memory length resource for slot %X not found, probing\n",
348  dev->name, ndev->board->slot);
349  offset = mac8390_memsize(dev->mem_start);
350  } else {
351  nubus_get_rsrc_mem(&offset, &ent, 4);
352  }
353  dev->mem_end = dev->mem_start + offset;
354  } else {
355  switch (cardtype) {
356  case MAC8390_KINETICS:
357  case MAC8390_DAYNA: /* it's the same */
358  dev->base_addr = (int)(ndev->board->slot_addr +
359  DAYNA_8390_BASE);
360  dev->mem_start = (int)(ndev->board->slot_addr +
361  DAYNA_8390_MEM);
362  dev->mem_end = dev->mem_start +
363  mac8390_memsize(dev->mem_start);
364  break;
365  case MAC8390_INTERLAN:
366  dev->base_addr = (int)(ndev->board->slot_addr +
367  INTERLAN_8390_BASE);
368  dev->mem_start = (int)(ndev->board->slot_addr +
369  INTERLAN_8390_MEM);
370  dev->mem_end = dev->mem_start +
371  mac8390_memsize(dev->mem_start);
372  break;
373  case MAC8390_CABLETRON:
374  dev->base_addr = (int)(ndev->board->slot_addr +
375  CABLETRON_8390_BASE);
376  dev->mem_start = (int)(ndev->board->slot_addr +
377  CABLETRON_8390_MEM);
378  /* The base address is unreadable if 0x00
379  * has been written to the command register
380  * Reset the chip by writing E8390_NODMA +
381  * E8390_PAGE0 + E8390_STOP just to be
382  * sure
383  */
384  i = (void *)dev->base_addr;
385  *i = 0x21;
386  dev->mem_end = dev->mem_start +
387  mac8390_memsize(dev->mem_start);
388  break;
389 
390  default:
391  pr_err("Card type %s is unsupported, sorry\n",
392  ndev->board->name);
393  return false;
394  }
395  }
396 
397  return true;
398 }
399 
400 struct net_device * __init mac8390_probe(int unit)
401 {
402  struct net_device *dev;
403  struct nubus_dev *ndev = NULL;
404  int err = -ENODEV;
405 
406  static unsigned int slots;
407 
408  enum mac8390_type cardtype;
409 
410  /* probably should check for Nubus instead */
411 
412  if (!MACH_IS_MAC)
413  return ERR_PTR(-ENODEV);
414 
415  dev = ____alloc_ei_netdev(0);
416  if (!dev)
417  return ERR_PTR(-ENOMEM);
418 
419  if (unit >= 0)
420  sprintf(dev->name, "eth%d", unit);
421 
422  while ((ndev = nubus_find_type(NUBUS_CAT_NETWORK, NUBUS_TYPE_ETHERNET,
423  ndev))) {
424  /* Have we seen it already? */
425  if (slots & (1 << ndev->board->slot))
426  continue;
427  slots |= 1 << ndev->board->slot;
428 
429  cardtype = mac8390_ident(ndev);
430  if (cardtype == MAC8390_NONE)
431  continue;
432 
433  if (!mac8390_init(dev, ndev, cardtype))
434  continue;
435 
436  /* Do the nasty 8390 stuff */
437  if (!mac8390_initdev(dev, ndev, cardtype))
438  break;
439  }
440 
441  if (!ndev)
442  goto out;
443  err = register_netdev(dev);
444  if (err)
445  goto out;
446  return dev;
447 
448 out:
449  free_netdev(dev);
450  return ERR_PTR(err);
451 }
452 
453 #ifdef MODULE
454 MODULE_AUTHOR("David Huggins-Daines <[email protected]> and others");
455 MODULE_DESCRIPTION("Macintosh NS8390-based Nubus Ethernet driver");
456 MODULE_LICENSE("GPL");
457 
458 /* overkill, of course */
459 static struct net_device *dev_mac8390[15];
460 int init_module(void)
461 {
462  int i;
463  for (i = 0; i < 15; i++) {
464  struct net_device *dev = mac8390_probe(-1);
465  if (IS_ERR(dev))
466  break;
467  dev_mac890[i] = dev;
468  }
469  if (!i) {
470  pr_notice("No useable cards found, driver NOT installed.\n");
471  return -ENODEV;
472  }
473  return 0;
474 }
475 
476 void cleanup_module(void)
477 {
478  int i;
479  for (i = 0; i < 15; i++) {
480  struct net_device *dev = dev_mac890[i];
481  if (dev) {
482  unregister_netdev(dev);
483  free_netdev(dev);
484  }
485  }
486 }
487 
488 #endif /* MODULE */
489 
490 static const struct net_device_ops mac8390_netdev_ops = {
491  .ndo_open = mac8390_open,
492  .ndo_stop = mac8390_close,
493  .ndo_start_xmit = __ei_start_xmit,
494  .ndo_tx_timeout = __ei_tx_timeout,
495  .ndo_get_stats = __ei_get_stats,
496  .ndo_set_rx_mode = __ei_set_multicast_list,
497  .ndo_validate_addr = eth_validate_addr,
498  .ndo_set_mac_address = eth_mac_addr,
499  .ndo_change_mtu = eth_change_mtu,
500 #ifdef CONFIG_NET_POLL_CONTROLLER
501  .ndo_poll_controller = __ei_poll,
502 #endif
503 };
504 
505 static int __init mac8390_initdev(struct net_device *dev,
506  struct nubus_dev *ndev,
507  enum mac8390_type type)
508 {
509  static u32 fwrd4_offsets[16] = {
510  0, 4, 8, 12,
511  16, 20, 24, 28,
512  32, 36, 40, 44,
513  48, 52, 56, 60
514  };
515  static u32 back4_offsets[16] = {
516  60, 56, 52, 48,
517  44, 40, 36, 32,
518  28, 24, 20, 16,
519  12, 8, 4, 0
520  };
521  static u32 fwrd2_offsets[16] = {
522  0, 2, 4, 6,
523  8, 10, 12, 14,
524  16, 18, 20, 22,
525  24, 26, 28, 30
526  };
527 
528  int access_bitmode = 0;
529 
530  /* Now fill in our stuff */
531  dev->netdev_ops = &mac8390_netdev_ops;
532 
533  /* GAR, ei_status is actually a macro even though it looks global */
534  ei_status.name = cardname[type];
535  ei_status.word16 = word16[type];
536 
537  /* Cabletron's TX/RX buffers are backwards */
538  if (type == MAC8390_CABLETRON) {
539  ei_status.tx_start_page = CABLETRON_TX_START_PG;
540  ei_status.rx_start_page = CABLETRON_RX_START_PG;
541  ei_status.stop_page = CABLETRON_RX_STOP_PG;
542  ei_status.rmem_start = dev->mem_start;
543  ei_status.rmem_end = dev->mem_start + CABLETRON_RX_STOP_PG*256;
544  } else {
545  ei_status.tx_start_page = WD_START_PG;
546  ei_status.rx_start_page = WD_START_PG + TX_PAGES;
547  ei_status.stop_page = (dev->mem_end - dev->mem_start)/256;
548  ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
549  ei_status.rmem_end = dev->mem_end;
550  }
551 
552  /* Fill in model-specific information and functions */
553  switch (type) {
554  case MAC8390_FARALLON:
555  case MAC8390_APPLE:
556  switch (mac8390_testio(dev->mem_start)) {
557  case ACCESS_UNKNOWN:
558  pr_err("Don't know how to access card memory!\n");
559  return -ENODEV;
560  break;
561 
562  case ACCESS_16:
563  /* 16 bit card, register map is reversed */
564  ei_status.reset_8390 = mac8390_no_reset;
565  ei_status.block_input = slow_sane_block_input;
566  ei_status.block_output = slow_sane_block_output;
567  ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
568  ei_status.reg_offset = back4_offsets;
569  break;
570 
571  case ACCESS_32:
572  /* 32 bit card, register map is reversed */
573  ei_status.reset_8390 = mac8390_no_reset;
574  ei_status.block_input = sane_block_input;
575  ei_status.block_output = sane_block_output;
576  ei_status.get_8390_hdr = sane_get_8390_hdr;
577  ei_status.reg_offset = back4_offsets;
578  access_bitmode = 1;
579  break;
580  }
581  break;
582 
583  case MAC8390_ASANTE:
584  /* Some Asante cards pass the 32 bit test
585  * but overwrite system memory when run at 32 bit.
586  * so we run them all at 16 bit.
587  */
588  ei_status.reset_8390 = mac8390_no_reset;
589  ei_status.block_input = slow_sane_block_input;
590  ei_status.block_output = slow_sane_block_output;
591  ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
592  ei_status.reg_offset = back4_offsets;
593  break;
594 
595  case MAC8390_CABLETRON:
596  /* 16 bit card, register map is short forward */
597  ei_status.reset_8390 = mac8390_no_reset;
598  ei_status.block_input = slow_sane_block_input;
599  ei_status.block_output = slow_sane_block_output;
600  ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
601  ei_status.reg_offset = fwrd2_offsets;
602  break;
603 
604  case MAC8390_DAYNA:
605  case MAC8390_KINETICS:
606  /* 16 bit memory, register map is forward */
607  /* dayna and similar */
608  ei_status.reset_8390 = mac8390_no_reset;
609  ei_status.block_input = dayna_block_input;
610  ei_status.block_output = dayna_block_output;
611  ei_status.get_8390_hdr = dayna_get_8390_hdr;
612  ei_status.reg_offset = fwrd4_offsets;
613  break;
614 
615  case MAC8390_INTERLAN:
616  /* 16 bit memory, register map is forward */
617  ei_status.reset_8390 = interlan_reset;
618  ei_status.block_input = slow_sane_block_input;
619  ei_status.block_output = slow_sane_block_output;
620  ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
621  ei_status.reg_offset = fwrd4_offsets;
622  break;
623 
624  default:
625  pr_err("Card type %s is unsupported, sorry\n",
626  ndev->board->name);
627  return -ENODEV;
628  }
629 
630  __NS8390_init(dev, 0);
631 
632  /* Good, done, now spit out some messages */
633  pr_info("%s: %s in slot %X (type %s)\n",
634  dev->name, ndev->board->name, ndev->board->slot,
635  cardname[type]);
636  pr_info("MAC %pM IRQ %d, %d KB shared memory at %#lx, %d-bit access.\n",
637  dev->dev_addr, dev->irq,
638  (unsigned int)(dev->mem_end - dev->mem_start) >> 10,
639  dev->mem_start, access_bitmode ? 32 : 16);
640  return 0;
641 }
642 
643 static int mac8390_open(struct net_device *dev)
644 {
645  int err;
646 
647  __ei_open(dev);
648  err = request_irq(dev->irq, __ei_interrupt, 0, "8390 Ethernet", dev);
649  if (err)
650  pr_err("%s: unable to get IRQ %d\n", dev->name, dev->irq);
651  return err;
652 }
653 
654 static int mac8390_close(struct net_device *dev)
655 {
656  free_irq(dev->irq, dev);
657  __ei_close(dev);
658  return 0;
659 }
660 
661 static void mac8390_no_reset(struct net_device *dev)
662 {
663  ei_status.txing = 0;
664  if (ei_debug > 1)
665  pr_info("reset not supported\n");
666 }
667 
668 static void interlan_reset(struct net_device *dev)
669 {
670  unsigned char *target = nubus_slot_addr(IRQ2SLOT(dev->irq));
671  if (ei_debug > 1)
672  pr_info("Need to reset the NS8390 t=%lu...", jiffies);
673  ei_status.txing = 0;
674  target[0xC0000] = 0;
675  if (ei_debug > 1)
676  pr_cont("reset complete\n");
677 }
678 
679 /* dayna_memcpy_fromio/dayna_memcpy_toio */
680 /* directly from daynaport.c by Alan Cox */
681 static void dayna_memcpy_fromcard(struct net_device *dev, void *to, int from,
682  int count)
683 {
684  volatile unsigned char *ptr;
685  unsigned char *target = to;
686  from <<= 1; /* word, skip overhead */
687  ptr = (unsigned char *)(dev->mem_start+from);
688  /* Leading byte? */
689  if (from & 2) {
690  *target++ = ptr[-1];
691  ptr += 2;
692  count--;
693  }
694  while (count >= 2) {
695  *(unsigned short *)target = *(unsigned short volatile *)ptr;
696  ptr += 4; /* skip cruft */
697  target += 2;
698  count -= 2;
699  }
700  /* Trailing byte? */
701  if (count)
702  *target = *ptr;
703 }
704 
705 static void dayna_memcpy_tocard(struct net_device *dev, int to,
706  const void *from, int count)
707 {
708  volatile unsigned short *ptr;
709  const unsigned char *src = from;
710  to <<= 1; /* word, skip overhead */
711  ptr = (unsigned short *)(dev->mem_start+to);
712  /* Leading byte? */
713  if (to & 2) { /* avoid a byte write (stomps on other data) */
714  ptr[-1] = (ptr[-1]&0xFF00)|*src++;
715  ptr++;
716  count--;
717  }
718  while (count >= 2) {
719  *ptr++ = *(unsigned short *)src; /* Copy and */
720  ptr++; /* skip cruft */
721  src += 2;
722  count -= 2;
723  }
724  /* Trailing byte? */
725  if (count) {
726  /* card doesn't like byte writes */
727  *ptr = (*ptr & 0x00FF) | (*src << 8);
728  }
729 }
730 
731 /* sane block input/output */
732 static void sane_get_8390_hdr(struct net_device *dev,
733  struct e8390_pkt_hdr *hdr, int ring_page)
734 {
735  unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
736  memcpy_fromio(hdr, dev->mem_start + hdr_start, 4);
737  /* Fix endianness */
738  hdr->count = swab16(hdr->count);
739 }
740 
741 static void sane_block_input(struct net_device *dev, int count,
742  struct sk_buff *skb, int ring_offset)
743 {
744  unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
745  unsigned long xfer_start = xfer_base + dev->mem_start;
746 
747  if (xfer_start + count > ei_status.rmem_end) {
748  /* We must wrap the input move. */
749  int semi_count = ei_status.rmem_end - xfer_start;
750  memcpy_fromio(skb->data, dev->mem_start + xfer_base,
751  semi_count);
752  count -= semi_count;
753  memcpy_fromio(skb->data + semi_count, ei_status.rmem_start,
754  count);
755  } else {
756  memcpy_fromio(skb->data, dev->mem_start + xfer_base, count);
757  }
758 }
759 
760 static void sane_block_output(struct net_device *dev, int count,
761  const unsigned char *buf, int start_page)
762 {
763  long shmem = (start_page - WD_START_PG)<<8;
764 
765  memcpy_toio(dev->mem_start + shmem, buf, count);
766 }
767 
768 /* dayna block input/output */
769 static void dayna_get_8390_hdr(struct net_device *dev,
770  struct e8390_pkt_hdr *hdr, int ring_page)
771 {
772  unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
773 
774  dayna_memcpy_fromcard(dev, hdr, hdr_start, 4);
775  /* Fix endianness */
776  hdr->count = (hdr->count & 0xFF) << 8 | (hdr->count >> 8);
777 }
778 
779 static void dayna_block_input(struct net_device *dev, int count,
780  struct sk_buff *skb, int ring_offset)
781 {
782  unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
783  unsigned long xfer_start = xfer_base+dev->mem_start;
784 
785  /* Note the offset math is done in card memory space which is word
786  per long onto our space. */
787 
788  if (xfer_start + count > ei_status.rmem_end) {
789  /* We must wrap the input move. */
790  int semi_count = ei_status.rmem_end - xfer_start;
791  dayna_memcpy_fromcard(dev, skb->data, xfer_base, semi_count);
792  count -= semi_count;
793  dayna_memcpy_fromcard(dev, skb->data + semi_count,
794  ei_status.rmem_start - dev->mem_start,
795  count);
796  } else {
797  dayna_memcpy_fromcard(dev, skb->data, xfer_base, count);
798  }
799 }
800 
801 static void dayna_block_output(struct net_device *dev, int count,
802  const unsigned char *buf,
803  int start_page)
804 {
805  long shmem = (start_page - WD_START_PG)<<8;
806 
807  dayna_memcpy_tocard(dev, shmem, buf, count);
808 }
809 
810 /* Cabletron block I/O */
811 static void slow_sane_get_8390_hdr(struct net_device *dev,
812  struct e8390_pkt_hdr *hdr,
813  int ring_page)
814 {
815  unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
816  word_memcpy_fromcard(hdr, dev->mem_start + hdr_start, 4);
817  /* Register endianism - fix here rather than 8390.c */
818  hdr->count = (hdr->count&0xFF)<<8|(hdr->count>>8);
819 }
820 
821 static void slow_sane_block_input(struct net_device *dev, int count,
822  struct sk_buff *skb, int ring_offset)
823 {
824  unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
825  unsigned long xfer_start = xfer_base+dev->mem_start;
826 
827  if (xfer_start + count > ei_status.rmem_end) {
828  /* We must wrap the input move. */
829  int semi_count = ei_status.rmem_end - xfer_start;
830  word_memcpy_fromcard(skb->data, dev->mem_start + xfer_base,
831  semi_count);
832  count -= semi_count;
833  word_memcpy_fromcard(skb->data + semi_count,
834  ei_status.rmem_start, count);
835  } else {
836  word_memcpy_fromcard(skb->data, dev->mem_start + xfer_base,
837  count);
838  }
839 }
840 
841 static void slow_sane_block_output(struct net_device *dev, int count,
842  const unsigned char *buf, int start_page)
843 {
844  long shmem = (start_page - WD_START_PG)<<8;
845 
846  word_memcpy_tocard(dev->mem_start + shmem, buf, count);
847 }
848 
849 static void word_memcpy_tocard(unsigned long tp, const void *fp, int count)
850 {
851  volatile unsigned short *to = (void *)tp;
852  const unsigned short *from = fp;
853 
854  count++;
855  count /= 2;
856 
857  while (count--)
858  *to++ = *from++;
859 }
860 
861 static void word_memcpy_fromcard(void *tp, unsigned long fp, int count)
862 {
863  unsigned short *to = tp;
864  const volatile unsigned short *from = (const void *)fp;
865 
866  count++;
867  count /= 2;
868 
869  while (count--)
870  *to++ = *from++;
871 }
872 
873 
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