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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/bootinfo.h>
34#include <asm/macintosh.h>
35#include <asm/macints.h>
36#include <asm/mac_via.h>
37#include <asm/mac_psc.h>
38#include <asm/mac_oss.h>
39
40volatile __u8 *via1, *via2;
41int rbv_present;
42int via_alt_mapping;
43EXPORT_SYMBOL(via_alt_mapping);
44static __u8 rbv_clear;
45
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54
55static int gIER,gIFR,gBufA,gBufB;
56
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58
59
60
61#define TICK_SIZE 10000
62#define MAC_CLOCK_TICK (783300/HZ)
63#define MAC_CLOCK_LOW (MAC_CLOCK_TICK&0xFF)
64#define MAC_CLOCK_HIGH (MAC_CLOCK_TICK>>8)
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107static u8 nubus_disabled;
108
109void via_debug_dump(void);
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122
123void __init via_init(void)
124{
125 switch(macintosh_config->via_type) {
126
127
128
129 case MAC_VIA_IICI:
130 via1 = (void *) VIA1_BASE;
131 if (macintosh_config->ident == MAC_MODEL_IIFX) {
132 via2 = NULL;
133 rbv_present = 0;
134 oss_present = 1;
135 } else {
136 via2 = (void *) RBV_BASE;
137 rbv_present = 1;
138 oss_present = 0;
139 }
140 if (macintosh_config->ident == MAC_MODEL_LCIII) {
141 rbv_clear = 0x00;
142 } else {
143
144
145
146 rbv_clear = 0x80;
147 }
148 gIER = rIER;
149 gIFR = rIFR;
150 gBufA = rSIFR;
151 gBufB = rBufB;
152 break;
153
154
155
156 case MAC_VIA_QUADRA:
157 case MAC_VIA_II:
158 via1 = (void *) VIA1_BASE;
159 via2 = (void *) VIA2_BASE;
160 rbv_present = 0;
161 oss_present = 0;
162 rbv_clear = 0x00;
163 gIER = vIER;
164 gIFR = vIFR;
165 gBufA = vBufA;
166 gBufB = vBufB;
167 break;
168 default:
169 panic("UNKNOWN VIA TYPE");
170 }
171
172 printk(KERN_INFO "VIA1 at %p is a 6522 or clone\n", via1);
173
174 printk(KERN_INFO "VIA2 at %p is ", via2);
175 if (rbv_present) {
176 printk("an RBV\n");
177 } else if (oss_present) {
178 printk("an OSS\n");
179 } else {
180 printk("a 6522 or clone\n");
181 }
182
183#ifdef DEBUG_VIA
184 via_debug_dump();
185#endif
186
187
188
189
190
191
192 via1[vIER] = 0x7F;
193 via1[vIFR] = 0x7F;
194 via1[vT1LL] = 0;
195 via1[vT1LH] = 0;
196 via1[vT1CL] = 0;
197 via1[vT1CH] = 0;
198 via1[vT2CL] = 0;
199 via1[vT2CH] = 0;
200 via1[vACR] &= ~0xC0;
201 via1[vACR] &= ~0x03;
202
203
204
205
206
207
208 if (macintosh_config->ident == MAC_MODEL_SE30) {
209 via1[vDirB] |= 0x40;
210 via1[vBufB] |= 0x40;
211 }
212
213
214
215
216
217
218 via1[vDirB] |= (VIA1B_vRTCEnb | VIA1B_vRTCClk | VIA1B_vRTCData);
219 via1[vBufB] |= (VIA1B_vRTCEnb | VIA1B_vRTCClk);
220
221
222
223 if (oss_present)
224 return;
225
226 if ((macintosh_config->via_type == MAC_VIA_QUADRA) &&
227 (macintosh_config->adb_type != MAC_ADB_PB1) &&
228 (macintosh_config->adb_type != MAC_ADB_PB2) &&
229 (macintosh_config->ident != MAC_MODEL_C660) &&
230 (macintosh_config->ident != MAC_MODEL_Q840)) {
231 via_alt_mapping = 1;
232 via1[vDirB] |= 0x40;
233 via1[vBufB] &= ~0x40;
234 } else {
235 via_alt_mapping = 0;
236 }
237
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242
243 via2[gIER] = 0x7F;
244 via2[gIFR] = 0x7F | rbv_clear;
245 if (!rbv_present) {
246 via2[vT1LL] = 0;
247 via2[vT1LH] = 0;
248 via2[vT1CL] = 0;
249 via2[vT1CH] = 0;
250 via2[vT2CL] = 0;
251 via2[vT2CH] = 0;
252 via2[vACR] &= ~0xC0;
253 via2[vACR] &= ~0x03;
254 }
255
256
257
258 if (rbv_present)
259 return;
260
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269
270
271 pr_debug("VIA2 vPCR is 0x%02X\n", via2[vPCR]);
272 if (macintosh_config->via_type == MAC_VIA_II) {
273
274 via2[vPCR] = 0x66;
275 } else {
276
277 via2[vPCR] = 0x22;
278 }
279}
280
281
282
283
284
285void __init via_init_clock(irq_handler_t func)
286{
287 via1[vACR] |= 0x40;
288 via1[vT1LL] = MAC_CLOCK_LOW;
289 via1[vT1LH] = MAC_CLOCK_HIGH;
290 via1[vT1CL] = MAC_CLOCK_LOW;
291 via1[vT1CH] = MAC_CLOCK_HIGH;
292
293 if (request_irq(IRQ_MAC_TIMER_1, func, 0, "timer", func))
294 pr_err("Couldn't register %s interrupt\n", "timer");
295}
296
297
298
299
300
301void via_debug_dump(void)
302{
303 printk(KERN_DEBUG "VIA1: DDRA = 0x%02X DDRB = 0x%02X ACR = 0x%02X\n",
304 (uint) via1[vDirA], (uint) via1[vDirB], (uint) via1[vACR]);
305 printk(KERN_DEBUG " PCR = 0x%02X IFR = 0x%02X IER = 0x%02X\n",
306 (uint) via1[vPCR], (uint) via1[vIFR], (uint) via1[vIER]);
307 if (oss_present) {
308 printk(KERN_DEBUG "VIA2: <OSS>\n");
309 } else if (rbv_present) {
310 printk(KERN_DEBUG "VIA2: IFR = 0x%02X IER = 0x%02X\n",
311 (uint) via2[rIFR], (uint) via2[rIER]);
312 printk(KERN_DEBUG " SIFR = 0x%02X SIER = 0x%02X\n",
313 (uint) via2[rSIFR], (uint) via2[rSIER]);
314 } else {
315 printk(KERN_DEBUG "VIA2: DDRA = 0x%02X DDRB = 0x%02X ACR = 0x%02X\n",
316 (uint) via2[vDirA], (uint) via2[vDirB],
317 (uint) via2[vACR]);
318 printk(KERN_DEBUG " PCR = 0x%02X IFR = 0x%02X IER = 0x%02X\n",
319 (uint) via2[vPCR],
320 (uint) via2[vIFR], (uint) via2[vIER]);
321 }
322}
323
324
325
326
327
328
329
330u32 mac_gettimeoffset(void)
331{
332 unsigned long ticks, offset = 0;
333
334
335 ticks = via1[vT1CL] | (via1[vT1CH] << 8);
336
337 if (ticks > MAC_CLOCK_TICK - MAC_CLOCK_TICK / 50)
338
339 if (via1[vIFR] & 0x40) offset = TICK_SIZE;
340
341 ticks = MAC_CLOCK_TICK - ticks;
342 ticks = ticks * 10000L / MAC_CLOCK_TICK;
343
344 return (ticks + offset) * 1000;
345}
346
347
348
349
350
351
352void via_flush_cache(void)
353{
354 via2[gBufB] &= ~VIA2B_vMode32;
355 via2[gBufB] |= VIA2B_vMode32;
356}
357
358
359
360
361
362int via_get_cache_disable(void)
363{
364
365 if (!via2) {
366 printk(KERN_ERR "via_get_cache_disable called on a non-VIA machine!\n");
367 return 1;
368 }
369
370 return (int) via2[gBufB] & VIA2B_vCDis;
371}
372
373
374
375
376
377void __init via_nubus_init(void)
378{
379
380
381 if ((macintosh_config->adb_type != MAC_ADB_PB1) &&
382 (macintosh_config->adb_type != MAC_ADB_PB2)) {
383
384 if (!rbv_present)
385 via2[vDirB] |= 0x02;
386
387
388
389 via2[gBufB] |= 0x02;
390 }
391
392
393
394
395
396
397 switch (macintosh_config->via_type) {
398 case MAC_VIA_II:
399 case MAC_VIA_QUADRA:
400 pr_debug("VIA2 vDirA is 0x%02X\n", via2[vDirA]);
401 break;
402 case MAC_VIA_IICI:
403
404 via2[rSIER] = 0x7F;
405 break;
406 }
407}
408
409void via_nubus_irq_startup(int irq)
410{
411 int irq_idx = IRQ_IDX(irq);
412
413 switch (macintosh_config->via_type) {
414 case MAC_VIA_II:
415 case MAC_VIA_QUADRA:
416
417 if (macintosh_config->via_type == MAC_VIA_II) {
418
419 via2[vDirA] &= 0xC0 | ~(1 << irq_idx);
420 } else {
421
422 via2[vDirA] &= 0x80 | ~(1 << irq_idx);
423 }
424
425 case MAC_VIA_IICI:
426 via_irq_enable(irq);
427 break;
428 }
429}
430
431void via_nubus_irq_shutdown(int irq)
432{
433 switch (macintosh_config->via_type) {
434 case MAC_VIA_II:
435 case MAC_VIA_QUADRA:
436
437 via_irq_enable(irq);
438 break;
439 case MAC_VIA_IICI:
440 via_irq_disable(irq);
441 break;
442 }
443}
444
445
446
447
448
449
450void via1_irq(unsigned int irq, struct irq_desc *desc)
451{
452 int irq_num;
453 unsigned char irq_bit, events;
454
455 events = via1[vIFR] & via1[vIER] & 0x7F;
456 if (!events)
457 return;
458
459 irq_num = VIA1_SOURCE_BASE;
460 irq_bit = 1;
461 do {
462 if (events & irq_bit) {
463 via1[vIFR] = irq_bit;
464 generic_handle_irq(irq_num);
465 }
466 ++irq_num;
467 irq_bit <<= 1;
468 } while (events >= irq_bit);
469}
470
471static void via2_irq(unsigned int irq, struct irq_desc *desc)
472{
473 int irq_num;
474 unsigned char irq_bit, events;
475
476 events = via2[gIFR] & via2[gIER] & 0x7F;
477 if (!events)
478 return;
479
480 irq_num = VIA2_SOURCE_BASE;
481 irq_bit = 1;
482 do {
483 if (events & irq_bit) {
484 via2[gIFR] = irq_bit | rbv_clear;
485 generic_handle_irq(irq_num);
486 }
487 ++irq_num;
488 irq_bit <<= 1;
489 } while (events >= irq_bit);
490}
491
492
493
494
495
496
497void via_nubus_irq(unsigned int irq, struct irq_desc *desc)
498{
499 int slot_irq;
500 unsigned char slot_bit, events;
501
502 events = ~via2[gBufA] & 0x7F;
503 if (rbv_present)
504 events &= via2[rSIER];
505 else
506 events &= ~via2[vDirA];
507 if (!events)
508 return;
509
510 do {
511 slot_irq = IRQ_NUBUS_F;
512 slot_bit = 0x40;
513 do {
514 if (events & slot_bit) {
515 events &= ~slot_bit;
516 generic_handle_irq(slot_irq);
517 }
518 --slot_irq;
519 slot_bit >>= 1;
520 } while (events);
521
522
523 via2[gIFR] = 0x02 | rbv_clear;
524 events = ~via2[gBufA] & 0x7F;
525 if (rbv_present)
526 events &= via2[rSIER];
527 else
528 events &= ~via2[vDirA];
529 } while (events);
530}
531
532
533
534
535
536void __init via_register_interrupts(void)
537{
538 if (via_alt_mapping) {
539
540 irq_set_chained_handler(IRQ_AUTO_1, via1_irq);
541
542 irq_set_chained_handler(IRQ_AUTO_6, via1_irq);
543 } else {
544 irq_set_chained_handler(IRQ_AUTO_1, via1_irq);
545 }
546 irq_set_chained_handler(IRQ_AUTO_2, via2_irq);
547 irq_set_chained_handler(IRQ_MAC_NUBUS, via_nubus_irq);
548}
549
550void via_irq_enable(int irq) {
551 int irq_src = IRQ_SRC(irq);
552 int irq_idx = IRQ_IDX(irq);
553
554#ifdef DEBUG_IRQUSE
555 printk(KERN_DEBUG "via_irq_enable(%d)\n", irq);
556#endif
557
558 if (irq_src == 1) {
559 via1[vIER] = IER_SET_BIT(irq_idx);
560 } else if (irq_src == 2) {
561 if (irq != IRQ_MAC_NUBUS || nubus_disabled == 0)
562 via2[gIER] = IER_SET_BIT(irq_idx);
563 } else if (irq_src == 7) {
564 switch (macintosh_config->via_type) {
565 case MAC_VIA_II:
566 case MAC_VIA_QUADRA:
567 nubus_disabled &= ~(1 << irq_idx);
568
569 if (!nubus_disabled)
570 via2[gIER] = IER_SET_BIT(1);
571 break;
572 case MAC_VIA_IICI:
573
574
575
576 via2[rSIER] = IER_SET_BIT(irq_idx);
577 break;
578 }
579 }
580}
581
582void via_irq_disable(int irq) {
583 int irq_src = IRQ_SRC(irq);
584 int irq_idx = IRQ_IDX(irq);
585
586#ifdef DEBUG_IRQUSE
587 printk(KERN_DEBUG "via_irq_disable(%d)\n", irq);
588#endif
589
590 if (irq_src == 1) {
591 via1[vIER] = IER_CLR_BIT(irq_idx);
592 } else if (irq_src == 2) {
593 via2[gIER] = IER_CLR_BIT(irq_idx);
594 } else if (irq_src == 7) {
595 switch (macintosh_config->via_type) {
596 case MAC_VIA_II:
597 case MAC_VIA_QUADRA:
598 nubus_disabled |= 1 << irq_idx;
599 if (nubus_disabled)
600 via2[gIER] = IER_CLR_BIT(1);
601 break;
602 case MAC_VIA_IICI:
603 via2[rSIER] = IER_CLR_BIT(irq_idx);
604 break;
605 }
606 }
607}
608
609void via1_set_head(int head)
610{
611 if (head == 0)
612 via1[vBufA] &= ~VIA1A_vHeadSel;
613 else
614 via1[vBufA] |= VIA1A_vHeadSel;
615}
616EXPORT_SYMBOL(via1_set_head);
617
618int via2_scsi_drq_pending(void)
619{
620 return via2[gIFR] & (1 << IRQ_IDX(IRQ_MAC_SCSIDRQ));
621}
622EXPORT_SYMBOL(via2_scsi_drq_pending);
623