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25#include <linux/types.h>
26#include <linux/kernel.h>
27#include <linux/mm.h>
28#include <linux/delay.h>
29#include <linux/init.h>
30#include <linux/module.h>
31#include <linux/irq.h>
32
33#include <asm/macintosh.h>
34#include <asm/macints.h>
35#include <asm/mac_via.h>
36#include <asm/mac_psc.h>
37#include <asm/mac_oss.h>
38
39volatile __u8 *via1, *via2;
40int rbv_present;
41int via_alt_mapping;
42EXPORT_SYMBOL(via_alt_mapping);
43static __u8 rbv_clear;
44
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52
53
54static int gIER,gIFR,gBufA,gBufB;
55
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57
58
59
60#define TICK_SIZE 10000
61#define MAC_CLOCK_TICK (783300/HZ)
62#define MAC_CLOCK_LOW (MAC_CLOCK_TICK&0xFF)
63#define MAC_CLOCK_HIGH (MAC_CLOCK_TICK>>8)
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106static u8 nubus_disabled;
107
108void via_debug_dump(void);
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121
122void __init via_init(void)
123{
124 switch(macintosh_config->via_type) {
125
126
127
128 case MAC_VIA_IICI:
129 via1 = (void *) VIA1_BASE;
130 if (macintosh_config->ident == MAC_MODEL_IIFX) {
131 via2 = NULL;
132 rbv_present = 0;
133 oss_present = 1;
134 } else {
135 via2 = (void *) RBV_BASE;
136 rbv_present = 1;
137 oss_present = 0;
138 }
139 if (macintosh_config->ident == MAC_MODEL_LCIII) {
140 rbv_clear = 0x00;
141 } else {
142
143
144
145 rbv_clear = 0x80;
146 }
147 gIER = rIER;
148 gIFR = rIFR;
149 gBufA = rSIFR;
150 gBufB = rBufB;
151 break;
152
153
154
155 case MAC_VIA_QUADRA:
156 case MAC_VIA_II:
157 via1 = (void *) VIA1_BASE;
158 via2 = (void *) VIA2_BASE;
159 rbv_present = 0;
160 oss_present = 0;
161 rbv_clear = 0x00;
162 gIER = vIER;
163 gIFR = vIFR;
164 gBufA = vBufA;
165 gBufB = vBufB;
166 break;
167 default:
168 panic("UNKNOWN VIA TYPE");
169 }
170
171 printk(KERN_INFO "VIA1 at %p is a 6522 or clone\n", via1);
172
173 printk(KERN_INFO "VIA2 at %p is ", via2);
174 if (rbv_present) {
175 printk("an RBV\n");
176 } else if (oss_present) {
177 printk("an OSS\n");
178 } else {
179 printk("a 6522 or clone\n");
180 }
181
182#ifdef DEBUG_VIA
183 via_debug_dump();
184#endif
185
186
187
188
189
190
191 via1[vIER] = 0x7F;
192 via1[vIFR] = 0x7F;
193 via1[vT1LL] = 0;
194 via1[vT1LH] = 0;
195 via1[vT1CL] = 0;
196 via1[vT1CH] = 0;
197 via1[vT2CL] = 0;
198 via1[vT2CH] = 0;
199 via1[vACR] &= ~0xC0;
200 via1[vACR] &= ~0x03;
201
202
203
204
205
206
207 if (macintosh_config->ident == MAC_MODEL_SE30) {
208 via1[vDirB] |= 0x40;
209 via1[vBufB] |= 0x40;
210 }
211
212
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214
215
216
217 via1[vDirB] |= (VIA1B_vRTCEnb | VIA1B_vRTCClk | VIA1B_vRTCData);
218 via1[vBufB] |= (VIA1B_vRTCEnb | VIA1B_vRTCClk);
219
220
221
222 if (oss_present)
223 return;
224
225 if ((macintosh_config->via_type == MAC_VIA_QUADRA) &&
226 (macintosh_config->adb_type != MAC_ADB_PB1) &&
227 (macintosh_config->adb_type != MAC_ADB_PB2) &&
228 (macintosh_config->ident != MAC_MODEL_C660) &&
229 (macintosh_config->ident != MAC_MODEL_Q840)) {
230 via_alt_mapping = 1;
231 via1[vDirB] |= 0x40;
232 via1[vBufB] &= ~0x40;
233 } else {
234 via_alt_mapping = 0;
235 }
236
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240
241
242 via2[gIER] = 0x7F;
243 via2[gIFR] = 0x7F | rbv_clear;
244 if (!rbv_present) {
245 via2[vT1LL] = 0;
246 via2[vT1LH] = 0;
247 via2[vT1CL] = 0;
248 via2[vT1CH] = 0;
249 via2[vT2CL] = 0;
250 via2[vT2CH] = 0;
251 via2[vACR] &= ~0xC0;
252 via2[vACR] &= ~0x03;
253 }
254
255
256
257 if (rbv_present)
258 return;
259
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268
269
270 pr_debug("VIA2 vPCR is 0x%02X\n", via2[vPCR]);
271 if (macintosh_config->via_type == MAC_VIA_II) {
272
273 via2[vPCR] = 0x66;
274 } else {
275
276 via2[vPCR] = 0x22;
277 }
278}
279
280
281
282
283
284void __init via_init_clock(irq_handler_t func)
285{
286 via1[vACR] |= 0x40;
287 via1[vT1LL] = MAC_CLOCK_LOW;
288 via1[vT1LH] = MAC_CLOCK_HIGH;
289 via1[vT1CL] = MAC_CLOCK_LOW;
290 via1[vT1CH] = MAC_CLOCK_HIGH;
291
292 if (request_irq(IRQ_MAC_TIMER_1, func, 0, "timer", func))
293 pr_err("Couldn't register %s interrupt\n", "timer");
294}
295
296
297
298
299
300void via_debug_dump(void)
301{
302 printk(KERN_DEBUG "VIA1: DDRA = 0x%02X DDRB = 0x%02X ACR = 0x%02X\n",
303 (uint) via1[vDirA], (uint) via1[vDirB], (uint) via1[vACR]);
304 printk(KERN_DEBUG " PCR = 0x%02X IFR = 0x%02X IER = 0x%02X\n",
305 (uint) via1[vPCR], (uint) via1[vIFR], (uint) via1[vIER]);
306 if (oss_present) {
307 printk(KERN_DEBUG "VIA2: <OSS>\n");
308 } else if (rbv_present) {
309 printk(KERN_DEBUG "VIA2: IFR = 0x%02X IER = 0x%02X\n",
310 (uint) via2[rIFR], (uint) via2[rIER]);
311 printk(KERN_DEBUG " SIFR = 0x%02X SIER = 0x%02X\n",
312 (uint) via2[rSIFR], (uint) via2[rSIER]);
313 } else {
314 printk(KERN_DEBUG "VIA2: DDRA = 0x%02X DDRB = 0x%02X ACR = 0x%02X\n",
315 (uint) via2[vDirA], (uint) via2[vDirB],
316 (uint) via2[vACR]);
317 printk(KERN_DEBUG " PCR = 0x%02X IFR = 0x%02X IER = 0x%02X\n",
318 (uint) via2[vPCR],
319 (uint) via2[vIFR], (uint) via2[vIER]);
320 }
321}
322
323
324
325
326
327
328
329u32 mac_gettimeoffset(void)
330{
331 unsigned long ticks, offset = 0;
332
333
334 ticks = via1[vT1CL] | (via1[vT1CH] << 8);
335
336 if (ticks > MAC_CLOCK_TICK - MAC_CLOCK_TICK / 50)
337
338 if (via1[vIFR] & 0x40) offset = TICK_SIZE;
339
340 ticks = MAC_CLOCK_TICK - ticks;
341 ticks = ticks * 10000L / MAC_CLOCK_TICK;
342
343 return (ticks + offset) * 1000;
344}
345
346
347
348
349
350
351void via_flush_cache(void)
352{
353 via2[gBufB] &= ~VIA2B_vMode32;
354 via2[gBufB] |= VIA2B_vMode32;
355}
356
357
358
359
360
361int via_get_cache_disable(void)
362{
363
364 if (!via2) {
365 printk(KERN_ERR "via_get_cache_disable called on a non-VIA machine!\n");
366 return 1;
367 }
368
369 return (int) via2[gBufB] & VIA2B_vCDis;
370}
371
372
373
374
375
376void __init via_nubus_init(void)
377{
378
379
380 if ((macintosh_config->adb_type != MAC_ADB_PB1) &&
381 (macintosh_config->adb_type != MAC_ADB_PB2)) {
382
383 if (!rbv_present)
384 via2[vDirB] |= 0x02;
385
386
387
388 via2[gBufB] |= 0x02;
389 }
390
391
392
393
394
395
396 switch (macintosh_config->via_type) {
397 case MAC_VIA_II:
398 case MAC_VIA_QUADRA:
399 pr_debug("VIA2 vDirA is 0x%02X\n", via2[vDirA]);
400 break;
401 case MAC_VIA_IICI:
402
403 via2[rSIER] = 0x7F;
404 break;
405 }
406}
407
408void via_nubus_irq_startup(int irq)
409{
410 int irq_idx = IRQ_IDX(irq);
411
412 switch (macintosh_config->via_type) {
413 case MAC_VIA_II:
414 case MAC_VIA_QUADRA:
415
416 if (macintosh_config->via_type == MAC_VIA_II) {
417
418 via2[vDirA] &= 0xC0 | ~(1 << irq_idx);
419 } else {
420
421 via2[vDirA] &= 0x80 | ~(1 << irq_idx);
422 }
423
424 case MAC_VIA_IICI:
425 via_irq_enable(irq);
426 break;
427 }
428}
429
430void via_nubus_irq_shutdown(int irq)
431{
432 switch (macintosh_config->via_type) {
433 case MAC_VIA_II:
434 case MAC_VIA_QUADRA:
435
436 via_irq_enable(irq);
437 break;
438 case MAC_VIA_IICI:
439 via_irq_disable(irq);
440 break;
441 }
442}
443
444
445
446
447
448
449void via1_irq(struct irq_desc *desc)
450{
451 int irq_num;
452 unsigned char irq_bit, events;
453
454 events = via1[vIFR] & via1[vIER] & 0x7F;
455 if (!events)
456 return;
457
458 irq_num = VIA1_SOURCE_BASE;
459 irq_bit = 1;
460 do {
461 if (events & irq_bit) {
462 via1[vIFR] = irq_bit;
463 generic_handle_irq(irq_num);
464 }
465 ++irq_num;
466 irq_bit <<= 1;
467 } while (events >= irq_bit);
468}
469
470static void via2_irq(struct irq_desc *desc)
471{
472 int irq_num;
473 unsigned char irq_bit, events;
474
475 events = via2[gIFR] & via2[gIER] & 0x7F;
476 if (!events)
477 return;
478
479 irq_num = VIA2_SOURCE_BASE;
480 irq_bit = 1;
481 do {
482 if (events & irq_bit) {
483 via2[gIFR] = irq_bit | rbv_clear;
484 generic_handle_irq(irq_num);
485 }
486 ++irq_num;
487 irq_bit <<= 1;
488 } while (events >= irq_bit);
489}
490
491
492
493
494
495
496static void via_nubus_irq(struct irq_desc *desc)
497{
498 int slot_irq;
499 unsigned char slot_bit, events;
500
501 events = ~via2[gBufA] & 0x7F;
502 if (rbv_present)
503 events &= via2[rSIER];
504 else
505 events &= ~via2[vDirA];
506 if (!events)
507 return;
508
509 do {
510 slot_irq = IRQ_NUBUS_F;
511 slot_bit = 0x40;
512 do {
513 if (events & slot_bit) {
514 events &= ~slot_bit;
515 generic_handle_irq(slot_irq);
516 }
517 --slot_irq;
518 slot_bit >>= 1;
519 } while (events);
520
521
522 via2[gIFR] = 0x02 | rbv_clear;
523 events = ~via2[gBufA] & 0x7F;
524 if (rbv_present)
525 events &= via2[rSIER];
526 else
527 events &= ~via2[vDirA];
528 } while (events);
529}
530
531
532
533
534
535void __init via_register_interrupts(void)
536{
537 if (via_alt_mapping) {
538
539 irq_set_chained_handler(IRQ_AUTO_1, via1_irq);
540
541 irq_set_chained_handler(IRQ_AUTO_6, via1_irq);
542 } else {
543 irq_set_chained_handler(IRQ_AUTO_1, via1_irq);
544 }
545 irq_set_chained_handler(IRQ_AUTO_2, via2_irq);
546 irq_set_chained_handler(IRQ_MAC_NUBUS, via_nubus_irq);
547}
548
549void via_irq_enable(int irq) {
550 int irq_src = IRQ_SRC(irq);
551 int irq_idx = IRQ_IDX(irq);
552
553#ifdef DEBUG_IRQUSE
554 printk(KERN_DEBUG "via_irq_enable(%d)\n", irq);
555#endif
556
557 if (irq_src == 1) {
558 via1[vIER] = IER_SET_BIT(irq_idx);
559 } else if (irq_src == 2) {
560 if (irq != IRQ_MAC_NUBUS || nubus_disabled == 0)
561 via2[gIER] = IER_SET_BIT(irq_idx);
562 } else if (irq_src == 7) {
563 switch (macintosh_config->via_type) {
564 case MAC_VIA_II:
565 case MAC_VIA_QUADRA:
566 nubus_disabled &= ~(1 << irq_idx);
567
568 if (!nubus_disabled)
569 via2[gIER] = IER_SET_BIT(1);
570 break;
571 case MAC_VIA_IICI:
572
573
574
575 via2[rSIER] = IER_SET_BIT(irq_idx);
576 break;
577 }
578 }
579}
580
581void via_irq_disable(int irq) {
582 int irq_src = IRQ_SRC(irq);
583 int irq_idx = IRQ_IDX(irq);
584
585#ifdef DEBUG_IRQUSE
586 printk(KERN_DEBUG "via_irq_disable(%d)\n", irq);
587#endif
588
589 if (irq_src == 1) {
590 via1[vIER] = IER_CLR_BIT(irq_idx);
591 } else if (irq_src == 2) {
592 via2[gIER] = IER_CLR_BIT(irq_idx);
593 } else if (irq_src == 7) {
594 switch (macintosh_config->via_type) {
595 case MAC_VIA_II:
596 case MAC_VIA_QUADRA:
597 nubus_disabled |= 1 << irq_idx;
598 if (nubus_disabled)
599 via2[gIER] = IER_CLR_BIT(1);
600 break;
601 case MAC_VIA_IICI:
602 via2[rSIER] = IER_CLR_BIT(irq_idx);
603 break;
604 }
605 }
606}
607
608void via1_set_head(int head)
609{
610 if (head == 0)
611 via1[vBufA] &= ~VIA1A_vHeadSel;
612 else
613 via1[vBufA] |= VIA1A_vHeadSel;
614}
615EXPORT_SYMBOL(via1_set_head);
616
617int via2_scsi_drq_pending(void)
618{
619 return via2[gIFR] & (1 << IRQ_IDX(IRQ_MAC_SCSIDRQ));
620}
621EXPORT_SYMBOL(via2_scsi_drq_pending);
622