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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * arch/powerpc/sysdev/ipic.c
4 *
5 * IPIC routines implementations.
6 *
7 * Copyright 2005 Freescale Semiconductor, Inc.
8 */
9#include <linux/kernel.h>
10#include <linux/init.h>
11#include <linux/errno.h>
12#include <linux/reboot.h>
13#include <linux/slab.h>
14#include <linux/stddef.h>
15#include <linux/sched.h>
16#include <linux/signal.h>
17#include <linux/syscore_ops.h>
18#include <linux/device.h>
19#include <linux/spinlock.h>
20#include <linux/fsl_devices.h>
21#include <asm/irq.h>
22#include <asm/io.h>
23#include <asm/prom.h>
24#include <asm/ipic.h>
25
26#include "ipic.h"
27
28static struct ipic * primary_ipic;
29static struct irq_chip ipic_level_irq_chip, ipic_edge_irq_chip;
30static DEFINE_RAW_SPINLOCK(ipic_lock);
31
32static struct ipic_info ipic_info[] = {
33 [1] = {
34 .mask = IPIC_SIMSR_H,
35 .prio = IPIC_SIPRR_C,
36 .force = IPIC_SIFCR_H,
37 .bit = 16,
38 .prio_mask = 0,
39 },
40 [2] = {
41 .mask = IPIC_SIMSR_H,
42 .prio = IPIC_SIPRR_C,
43 .force = IPIC_SIFCR_H,
44 .bit = 17,
45 .prio_mask = 1,
46 },
47 [3] = {
48 .mask = IPIC_SIMSR_H,
49 .prio = IPIC_SIPRR_C,
50 .force = IPIC_SIFCR_H,
51 .bit = 18,
52 .prio_mask = 2,
53 },
54 [4] = {
55 .mask = IPIC_SIMSR_H,
56 .prio = IPIC_SIPRR_C,
57 .force = IPIC_SIFCR_H,
58 .bit = 19,
59 .prio_mask = 3,
60 },
61 [5] = {
62 .mask = IPIC_SIMSR_H,
63 .prio = IPIC_SIPRR_C,
64 .force = IPIC_SIFCR_H,
65 .bit = 20,
66 .prio_mask = 4,
67 },
68 [6] = {
69 .mask = IPIC_SIMSR_H,
70 .prio = IPIC_SIPRR_C,
71 .force = IPIC_SIFCR_H,
72 .bit = 21,
73 .prio_mask = 5,
74 },
75 [7] = {
76 .mask = IPIC_SIMSR_H,
77 .prio = IPIC_SIPRR_C,
78 .force = IPIC_SIFCR_H,
79 .bit = 22,
80 .prio_mask = 6,
81 },
82 [8] = {
83 .mask = IPIC_SIMSR_H,
84 .prio = IPIC_SIPRR_C,
85 .force = IPIC_SIFCR_H,
86 .bit = 23,
87 .prio_mask = 7,
88 },
89 [9] = {
90 .mask = IPIC_SIMSR_H,
91 .prio = IPIC_SIPRR_D,
92 .force = IPIC_SIFCR_H,
93 .bit = 24,
94 .prio_mask = 0,
95 },
96 [10] = {
97 .mask = IPIC_SIMSR_H,
98 .prio = IPIC_SIPRR_D,
99 .force = IPIC_SIFCR_H,
100 .bit = 25,
101 .prio_mask = 1,
102 },
103 [11] = {
104 .mask = IPIC_SIMSR_H,
105 .prio = IPIC_SIPRR_D,
106 .force = IPIC_SIFCR_H,
107 .bit = 26,
108 .prio_mask = 2,
109 },
110 [12] = {
111 .mask = IPIC_SIMSR_H,
112 .prio = IPIC_SIPRR_D,
113 .force = IPIC_SIFCR_H,
114 .bit = 27,
115 .prio_mask = 3,
116 },
117 [13] = {
118 .mask = IPIC_SIMSR_H,
119 .prio = IPIC_SIPRR_D,
120 .force = IPIC_SIFCR_H,
121 .bit = 28,
122 .prio_mask = 4,
123 },
124 [14] = {
125 .mask = IPIC_SIMSR_H,
126 .prio = IPIC_SIPRR_D,
127 .force = IPIC_SIFCR_H,
128 .bit = 29,
129 .prio_mask = 5,
130 },
131 [15] = {
132 .mask = IPIC_SIMSR_H,
133 .prio = IPIC_SIPRR_D,
134 .force = IPIC_SIFCR_H,
135 .bit = 30,
136 .prio_mask = 6,
137 },
138 [16] = {
139 .mask = IPIC_SIMSR_H,
140 .prio = IPIC_SIPRR_D,
141 .force = IPIC_SIFCR_H,
142 .bit = 31,
143 .prio_mask = 7,
144 },
145 [17] = {
146 .ack = IPIC_SEPNR,
147 .mask = IPIC_SEMSR,
148 .prio = IPIC_SMPRR_A,
149 .force = IPIC_SEFCR,
150 .bit = 1,
151 .prio_mask = 5,
152 },
153 [18] = {
154 .ack = IPIC_SEPNR,
155 .mask = IPIC_SEMSR,
156 .prio = IPIC_SMPRR_A,
157 .force = IPIC_SEFCR,
158 .bit = 2,
159 .prio_mask = 6,
160 },
161 [19] = {
162 .ack = IPIC_SEPNR,
163 .mask = IPIC_SEMSR,
164 .prio = IPIC_SMPRR_A,
165 .force = IPIC_SEFCR,
166 .bit = 3,
167 .prio_mask = 7,
168 },
169 [20] = {
170 .ack = IPIC_SEPNR,
171 .mask = IPIC_SEMSR,
172 .prio = IPIC_SMPRR_B,
173 .force = IPIC_SEFCR,
174 .bit = 4,
175 .prio_mask = 4,
176 },
177 [21] = {
178 .ack = IPIC_SEPNR,
179 .mask = IPIC_SEMSR,
180 .prio = IPIC_SMPRR_B,
181 .force = IPIC_SEFCR,
182 .bit = 5,
183 .prio_mask = 5,
184 },
185 [22] = {
186 .ack = IPIC_SEPNR,
187 .mask = IPIC_SEMSR,
188 .prio = IPIC_SMPRR_B,
189 .force = IPIC_SEFCR,
190 .bit = 6,
191 .prio_mask = 6,
192 },
193 [23] = {
194 .ack = IPIC_SEPNR,
195 .mask = IPIC_SEMSR,
196 .prio = IPIC_SMPRR_B,
197 .force = IPIC_SEFCR,
198 .bit = 7,
199 .prio_mask = 7,
200 },
201 [32] = {
202 .mask = IPIC_SIMSR_H,
203 .prio = IPIC_SIPRR_A,
204 .force = IPIC_SIFCR_H,
205 .bit = 0,
206 .prio_mask = 0,
207 },
208 [33] = {
209 .mask = IPIC_SIMSR_H,
210 .prio = IPIC_SIPRR_A,
211 .force = IPIC_SIFCR_H,
212 .bit = 1,
213 .prio_mask = 1,
214 },
215 [34] = {
216 .mask = IPIC_SIMSR_H,
217 .prio = IPIC_SIPRR_A,
218 .force = IPIC_SIFCR_H,
219 .bit = 2,
220 .prio_mask = 2,
221 },
222 [35] = {
223 .mask = IPIC_SIMSR_H,
224 .prio = IPIC_SIPRR_A,
225 .force = IPIC_SIFCR_H,
226 .bit = 3,
227 .prio_mask = 3,
228 },
229 [36] = {
230 .mask = IPIC_SIMSR_H,
231 .prio = IPIC_SIPRR_A,
232 .force = IPIC_SIFCR_H,
233 .bit = 4,
234 .prio_mask = 4,
235 },
236 [37] = {
237 .mask = IPIC_SIMSR_H,
238 .prio = IPIC_SIPRR_A,
239 .force = IPIC_SIFCR_H,
240 .bit = 5,
241 .prio_mask = 5,
242 },
243 [38] = {
244 .mask = IPIC_SIMSR_H,
245 .prio = IPIC_SIPRR_A,
246 .force = IPIC_SIFCR_H,
247 .bit = 6,
248 .prio_mask = 6,
249 },
250 [39] = {
251 .mask = IPIC_SIMSR_H,
252 .prio = IPIC_SIPRR_A,
253 .force = IPIC_SIFCR_H,
254 .bit = 7,
255 .prio_mask = 7,
256 },
257 [40] = {
258 .mask = IPIC_SIMSR_H,
259 .prio = IPIC_SIPRR_B,
260 .force = IPIC_SIFCR_H,
261 .bit = 8,
262 .prio_mask = 0,
263 },
264 [41] = {
265 .mask = IPIC_SIMSR_H,
266 .prio = IPIC_SIPRR_B,
267 .force = IPIC_SIFCR_H,
268 .bit = 9,
269 .prio_mask = 1,
270 },
271 [42] = {
272 .mask = IPIC_SIMSR_H,
273 .prio = IPIC_SIPRR_B,
274 .force = IPIC_SIFCR_H,
275 .bit = 10,
276 .prio_mask = 2,
277 },
278 [43] = {
279 .mask = IPIC_SIMSR_H,
280 .prio = IPIC_SIPRR_B,
281 .force = IPIC_SIFCR_H,
282 .bit = 11,
283 .prio_mask = 3,
284 },
285 [44] = {
286 .mask = IPIC_SIMSR_H,
287 .prio = IPIC_SIPRR_B,
288 .force = IPIC_SIFCR_H,
289 .bit = 12,
290 .prio_mask = 4,
291 },
292 [45] = {
293 .mask = IPIC_SIMSR_H,
294 .prio = IPIC_SIPRR_B,
295 .force = IPIC_SIFCR_H,
296 .bit = 13,
297 .prio_mask = 5,
298 },
299 [46] = {
300 .mask = IPIC_SIMSR_H,
301 .prio = IPIC_SIPRR_B,
302 .force = IPIC_SIFCR_H,
303 .bit = 14,
304 .prio_mask = 6,
305 },
306 [47] = {
307 .mask = IPIC_SIMSR_H,
308 .prio = IPIC_SIPRR_B,
309 .force = IPIC_SIFCR_H,
310 .bit = 15,
311 .prio_mask = 7,
312 },
313 [48] = {
314 .ack = IPIC_SEPNR,
315 .mask = IPIC_SEMSR,
316 .prio = IPIC_SMPRR_A,
317 .force = IPIC_SEFCR,
318 .bit = 0,
319 .prio_mask = 4,
320 },
321 [64] = {
322 .mask = IPIC_SIMSR_L,
323 .prio = IPIC_SMPRR_A,
324 .force = IPIC_SIFCR_L,
325 .bit = 0,
326 .prio_mask = 0,
327 },
328 [65] = {
329 .mask = IPIC_SIMSR_L,
330 .prio = IPIC_SMPRR_A,
331 .force = IPIC_SIFCR_L,
332 .bit = 1,
333 .prio_mask = 1,
334 },
335 [66] = {
336 .mask = IPIC_SIMSR_L,
337 .prio = IPIC_SMPRR_A,
338 .force = IPIC_SIFCR_L,
339 .bit = 2,
340 .prio_mask = 2,
341 },
342 [67] = {
343 .mask = IPIC_SIMSR_L,
344 .prio = IPIC_SMPRR_A,
345 .force = IPIC_SIFCR_L,
346 .bit = 3,
347 .prio_mask = 3,
348 },
349 [68] = {
350 .mask = IPIC_SIMSR_L,
351 .prio = IPIC_SMPRR_B,
352 .force = IPIC_SIFCR_L,
353 .bit = 4,
354 .prio_mask = 0,
355 },
356 [69] = {
357 .mask = IPIC_SIMSR_L,
358 .prio = IPIC_SMPRR_B,
359 .force = IPIC_SIFCR_L,
360 .bit = 5,
361 .prio_mask = 1,
362 },
363 [70] = {
364 .mask = IPIC_SIMSR_L,
365 .prio = IPIC_SMPRR_B,
366 .force = IPIC_SIFCR_L,
367 .bit = 6,
368 .prio_mask = 2,
369 },
370 [71] = {
371 .mask = IPIC_SIMSR_L,
372 .prio = IPIC_SMPRR_B,
373 .force = IPIC_SIFCR_L,
374 .bit = 7,
375 .prio_mask = 3,
376 },
377 [72] = {
378 .mask = IPIC_SIMSR_L,
379 .prio = 0,
380 .force = IPIC_SIFCR_L,
381 .bit = 8,
382 },
383 [73] = {
384 .mask = IPIC_SIMSR_L,
385 .prio = 0,
386 .force = IPIC_SIFCR_L,
387 .bit = 9,
388 },
389 [74] = {
390 .mask = IPIC_SIMSR_L,
391 .prio = 0,
392 .force = IPIC_SIFCR_L,
393 .bit = 10,
394 },
395 [75] = {
396 .mask = IPIC_SIMSR_L,
397 .prio = 0,
398 .force = IPIC_SIFCR_L,
399 .bit = 11,
400 },
401 [76] = {
402 .mask = IPIC_SIMSR_L,
403 .prio = 0,
404 .force = IPIC_SIFCR_L,
405 .bit = 12,
406 },
407 [77] = {
408 .mask = IPIC_SIMSR_L,
409 .prio = 0,
410 .force = IPIC_SIFCR_L,
411 .bit = 13,
412 },
413 [78] = {
414 .mask = IPIC_SIMSR_L,
415 .prio = 0,
416 .force = IPIC_SIFCR_L,
417 .bit = 14,
418 },
419 [79] = {
420 .mask = IPIC_SIMSR_L,
421 .prio = 0,
422 .force = IPIC_SIFCR_L,
423 .bit = 15,
424 },
425 [80] = {
426 .mask = IPIC_SIMSR_L,
427 .prio = 0,
428 .force = IPIC_SIFCR_L,
429 .bit = 16,
430 },
431 [81] = {
432 .mask = IPIC_SIMSR_L,
433 .prio = 0,
434 .force = IPIC_SIFCR_L,
435 .bit = 17,
436 },
437 [82] = {
438 .mask = IPIC_SIMSR_L,
439 .prio = 0,
440 .force = IPIC_SIFCR_L,
441 .bit = 18,
442 },
443 [83] = {
444 .mask = IPIC_SIMSR_L,
445 .prio = 0,
446 .force = IPIC_SIFCR_L,
447 .bit = 19,
448 },
449 [84] = {
450 .mask = IPIC_SIMSR_L,
451 .prio = 0,
452 .force = IPIC_SIFCR_L,
453 .bit = 20,
454 },
455 [85] = {
456 .mask = IPIC_SIMSR_L,
457 .prio = 0,
458 .force = IPIC_SIFCR_L,
459 .bit = 21,
460 },
461 [86] = {
462 .mask = IPIC_SIMSR_L,
463 .prio = 0,
464 .force = IPIC_SIFCR_L,
465 .bit = 22,
466 },
467 [87] = {
468 .mask = IPIC_SIMSR_L,
469 .prio = 0,
470 .force = IPIC_SIFCR_L,
471 .bit = 23,
472 },
473 [88] = {
474 .mask = IPIC_SIMSR_L,
475 .prio = 0,
476 .force = IPIC_SIFCR_L,
477 .bit = 24,
478 },
479 [89] = {
480 .mask = IPIC_SIMSR_L,
481 .prio = 0,
482 .force = IPIC_SIFCR_L,
483 .bit = 25,
484 },
485 [90] = {
486 .mask = IPIC_SIMSR_L,
487 .prio = 0,
488 .force = IPIC_SIFCR_L,
489 .bit = 26,
490 },
491 [91] = {
492 .mask = IPIC_SIMSR_L,
493 .prio = 0,
494 .force = IPIC_SIFCR_L,
495 .bit = 27,
496 },
497 [94] = {
498 .mask = IPIC_SIMSR_L,
499 .prio = 0,
500 .force = IPIC_SIFCR_L,
501 .bit = 30,
502 },
503};
504
505static inline u32 ipic_read(volatile u32 __iomem *base, unsigned int reg)
506{
507 return in_be32(base + (reg >> 2));
508}
509
510static inline void ipic_write(volatile u32 __iomem *base, unsigned int reg, u32 value)
511{
512 out_be32(base + (reg >> 2), value);
513}
514
515static inline struct ipic * ipic_from_irq(unsigned int virq)
516{
517 return primary_ipic;
518}
519
520static void ipic_unmask_irq(struct irq_data *d)
521{
522 struct ipic *ipic = ipic_from_irq(d->irq);
523 unsigned int src = irqd_to_hwirq(d);
524 unsigned long flags;
525 u32 temp;
526
527 raw_spin_lock_irqsave(&ipic_lock, flags);
528
529 temp = ipic_read(ipic->regs, ipic_info[src].mask);
530 temp |= (1 << (31 - ipic_info[src].bit));
531 ipic_write(ipic->regs, ipic_info[src].mask, temp);
532
533 raw_spin_unlock_irqrestore(&ipic_lock, flags);
534}
535
536static void ipic_mask_irq(struct irq_data *d)
537{
538 struct ipic *ipic = ipic_from_irq(d->irq);
539 unsigned int src = irqd_to_hwirq(d);
540 unsigned long flags;
541 u32 temp;
542
543 raw_spin_lock_irqsave(&ipic_lock, flags);
544
545 temp = ipic_read(ipic->regs, ipic_info[src].mask);
546 temp &= ~(1 << (31 - ipic_info[src].bit));
547 ipic_write(ipic->regs, ipic_info[src].mask, temp);
548
549 /* mb() can't guarantee that masking is finished. But it does finish
550 * for nearly all cases. */
551 mb();
552
553 raw_spin_unlock_irqrestore(&ipic_lock, flags);
554}
555
556static void ipic_ack_irq(struct irq_data *d)
557{
558 struct ipic *ipic = ipic_from_irq(d->irq);
559 unsigned int src = irqd_to_hwirq(d);
560 unsigned long flags;
561 u32 temp;
562
563 raw_spin_lock_irqsave(&ipic_lock, flags);
564
565 temp = 1 << (31 - ipic_info[src].bit);
566 ipic_write(ipic->regs, ipic_info[src].ack, temp);
567
568 /* mb() can't guarantee that ack is finished. But it does finish
569 * for nearly all cases. */
570 mb();
571
572 raw_spin_unlock_irqrestore(&ipic_lock, flags);
573}
574
575static void ipic_mask_irq_and_ack(struct irq_data *d)
576{
577 struct ipic *ipic = ipic_from_irq(d->irq);
578 unsigned int src = irqd_to_hwirq(d);
579 unsigned long flags;
580 u32 temp;
581
582 raw_spin_lock_irqsave(&ipic_lock, flags);
583
584 temp = ipic_read(ipic->regs, ipic_info[src].mask);
585 temp &= ~(1 << (31 - ipic_info[src].bit));
586 ipic_write(ipic->regs, ipic_info[src].mask, temp);
587
588 temp = 1 << (31 - ipic_info[src].bit);
589 ipic_write(ipic->regs, ipic_info[src].ack, temp);
590
591 /* mb() can't guarantee that ack is finished. But it does finish
592 * for nearly all cases. */
593 mb();
594
595 raw_spin_unlock_irqrestore(&ipic_lock, flags);
596}
597
598static int ipic_set_irq_type(struct irq_data *d, unsigned int flow_type)
599{
600 struct ipic *ipic = ipic_from_irq(d->irq);
601 unsigned int src = irqd_to_hwirq(d);
602 unsigned int vold, vnew, edibit;
603
604 if (flow_type == IRQ_TYPE_NONE)
605 flow_type = IRQ_TYPE_LEVEL_LOW;
606
607 /* ipic supports only low assertion and high-to-low change senses
608 */
609 if (!(flow_type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING))) {
610 printk(KERN_ERR "ipic: sense type 0x%x not supported\n",
611 flow_type);
612 return -EINVAL;
613 }
614 /* ipic supports only edge mode on external interrupts */
615 if ((flow_type & IRQ_TYPE_EDGE_FALLING) && !ipic_info[src].ack) {
616 printk(KERN_ERR "ipic: edge sense not supported on internal "
617 "interrupts\n");
618 return -EINVAL;
619
620 }
621
622 irqd_set_trigger_type(d, flow_type);
623 if (flow_type & IRQ_TYPE_LEVEL_LOW) {
624 irq_set_handler_locked(d, handle_level_irq);
625 d->chip = &ipic_level_irq_chip;
626 } else {
627 irq_set_handler_locked(d, handle_edge_irq);
628 d->chip = &ipic_edge_irq_chip;
629 }
630
631 /* only EXT IRQ senses are programmable on ipic
632 * internal IRQ senses are LEVEL_LOW
633 */
634 if (src == IPIC_IRQ_EXT0)
635 edibit = 15;
636 else
637 if (src >= IPIC_IRQ_EXT1 && src <= IPIC_IRQ_EXT7)
638 edibit = (14 - (src - IPIC_IRQ_EXT1));
639 else
640 return (flow_type & IRQ_TYPE_LEVEL_LOW) ? 0 : -EINVAL;
641
642 vold = ipic_read(ipic->regs, IPIC_SECNR);
643 if ((flow_type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_FALLING) {
644 vnew = vold | (1 << edibit);
645 } else {
646 vnew = vold & ~(1 << edibit);
647 }
648 if (vold != vnew)
649 ipic_write(ipic->regs, IPIC_SECNR, vnew);
650 return IRQ_SET_MASK_OK_NOCOPY;
651}
652
653/* level interrupts and edge interrupts have different ack operations */
654static struct irq_chip ipic_level_irq_chip = {
655 .name = "IPIC",
656 .irq_unmask = ipic_unmask_irq,
657 .irq_mask = ipic_mask_irq,
658 .irq_mask_ack = ipic_mask_irq,
659 .irq_set_type = ipic_set_irq_type,
660};
661
662static struct irq_chip ipic_edge_irq_chip = {
663 .name = "IPIC",
664 .irq_unmask = ipic_unmask_irq,
665 .irq_mask = ipic_mask_irq,
666 .irq_mask_ack = ipic_mask_irq_and_ack,
667 .irq_ack = ipic_ack_irq,
668 .irq_set_type = ipic_set_irq_type,
669};
670
671static int ipic_host_match(struct irq_domain *h, struct device_node *node,
672 enum irq_domain_bus_token bus_token)
673{
674 /* Exact match, unless ipic node is NULL */
675 struct device_node *of_node = irq_domain_get_of_node(h);
676 return of_node == NULL || of_node == node;
677}
678
679static int ipic_host_map(struct irq_domain *h, unsigned int virq,
680 irq_hw_number_t hw)
681{
682 struct ipic *ipic = h->host_data;
683
684 irq_set_chip_data(virq, ipic);
685 irq_set_chip_and_handler(virq, &ipic_level_irq_chip, handle_level_irq);
686
687 /* Set default irq type */
688 irq_set_irq_type(virq, IRQ_TYPE_NONE);
689
690 return 0;
691}
692
693static const struct irq_domain_ops ipic_host_ops = {
694 .match = ipic_host_match,
695 .map = ipic_host_map,
696 .xlate = irq_domain_xlate_onetwocell,
697};
698
699struct ipic * __init ipic_init(struct device_node *node, unsigned int flags)
700{
701 struct ipic *ipic;
702 struct resource res;
703 u32 temp = 0, ret;
704
705 ret = of_address_to_resource(node, 0, &res);
706 if (ret)
707 return NULL;
708
709 ipic = kzalloc(sizeof(*ipic), GFP_KERNEL);
710 if (ipic == NULL)
711 return NULL;
712
713 ipic->irqhost = irq_domain_add_linear(node, NR_IPIC_INTS,
714 &ipic_host_ops, ipic);
715 if (ipic->irqhost == NULL) {
716 kfree(ipic);
717 return NULL;
718 }
719
720 ipic->regs = ioremap(res.start, resource_size(&res));
721
722 /* init hw */
723 ipic_write(ipic->regs, IPIC_SICNR, 0x0);
724
725 /* default priority scheme is grouped. If spread mode is required
726 * configure SICFR accordingly */
727 if (flags & IPIC_SPREADMODE_GRP_A)
728 temp |= SICFR_IPSA;
729 if (flags & IPIC_SPREADMODE_GRP_B)
730 temp |= SICFR_IPSB;
731 if (flags & IPIC_SPREADMODE_GRP_C)
732 temp |= SICFR_IPSC;
733 if (flags & IPIC_SPREADMODE_GRP_D)
734 temp |= SICFR_IPSD;
735 if (flags & IPIC_SPREADMODE_MIX_A)
736 temp |= SICFR_MPSA;
737 if (flags & IPIC_SPREADMODE_MIX_B)
738 temp |= SICFR_MPSB;
739
740 ipic_write(ipic->regs, IPIC_SICFR, temp);
741
742 /* handle MCP route */
743 temp = 0;
744 if (flags & IPIC_DISABLE_MCP_OUT)
745 temp = SERCR_MCPR;
746 ipic_write(ipic->regs, IPIC_SERCR, temp);
747
748 /* handle routing of IRQ0 to MCP */
749 temp = ipic_read(ipic->regs, IPIC_SEMSR);
750
751 if (flags & IPIC_IRQ0_MCP)
752 temp |= SEMSR_SIRQ0;
753 else
754 temp &= ~SEMSR_SIRQ0;
755
756 ipic_write(ipic->regs, IPIC_SEMSR, temp);
757
758 primary_ipic = ipic;
759 irq_set_default_host(primary_ipic->irqhost);
760
761 ipic_write(ipic->regs, IPIC_SIMSR_H, 0);
762 ipic_write(ipic->regs, IPIC_SIMSR_L, 0);
763
764 printk ("IPIC (%d IRQ sources) at %p\n", NR_IPIC_INTS,
765 primary_ipic->regs);
766
767 return ipic;
768}
769
770void ipic_set_default_priority(void)
771{
772 ipic_write(primary_ipic->regs, IPIC_SIPRR_A, IPIC_PRIORITY_DEFAULT);
773 ipic_write(primary_ipic->regs, IPIC_SIPRR_B, IPIC_PRIORITY_DEFAULT);
774 ipic_write(primary_ipic->regs, IPIC_SIPRR_C, IPIC_PRIORITY_DEFAULT);
775 ipic_write(primary_ipic->regs, IPIC_SIPRR_D, IPIC_PRIORITY_DEFAULT);
776 ipic_write(primary_ipic->regs, IPIC_SMPRR_A, IPIC_PRIORITY_DEFAULT);
777 ipic_write(primary_ipic->regs, IPIC_SMPRR_B, IPIC_PRIORITY_DEFAULT);
778}
779
780u32 ipic_get_mcp_status(void)
781{
782 return primary_ipic ? ipic_read(primary_ipic->regs, IPIC_SERSR) : 0;
783}
784
785void ipic_clear_mcp_status(u32 mask)
786{
787 ipic_write(primary_ipic->regs, IPIC_SERSR, mask);
788}
789
790/* Return an interrupt vector or 0 if no interrupt is pending. */
791unsigned int ipic_get_irq(void)
792{
793 int irq;
794
795 BUG_ON(primary_ipic == NULL);
796
797#define IPIC_SIVCR_VECTOR_MASK 0x7f
798 irq = ipic_read(primary_ipic->regs, IPIC_SIVCR) & IPIC_SIVCR_VECTOR_MASK;
799
800 if (irq == 0) /* 0 --> no irq is pending */
801 return 0;
802
803 return irq_linear_revmap(primary_ipic->irqhost, irq);
804}
805
806#ifdef CONFIG_SUSPEND
807static struct {
808 u32 sicfr;
809 u32 siprr[2];
810 u32 simsr[2];
811 u32 sicnr;
812 u32 smprr[2];
813 u32 semsr;
814 u32 secnr;
815 u32 sermr;
816 u32 sercr;
817} ipic_saved_state;
818
819static int ipic_suspend(void)
820{
821 struct ipic *ipic = primary_ipic;
822
823 ipic_saved_state.sicfr = ipic_read(ipic->regs, IPIC_SICFR);
824 ipic_saved_state.siprr[0] = ipic_read(ipic->regs, IPIC_SIPRR_A);
825 ipic_saved_state.siprr[1] = ipic_read(ipic->regs, IPIC_SIPRR_D);
826 ipic_saved_state.simsr[0] = ipic_read(ipic->regs, IPIC_SIMSR_H);
827 ipic_saved_state.simsr[1] = ipic_read(ipic->regs, IPIC_SIMSR_L);
828 ipic_saved_state.sicnr = ipic_read(ipic->regs, IPIC_SICNR);
829 ipic_saved_state.smprr[0] = ipic_read(ipic->regs, IPIC_SMPRR_A);
830 ipic_saved_state.smprr[1] = ipic_read(ipic->regs, IPIC_SMPRR_B);
831 ipic_saved_state.semsr = ipic_read(ipic->regs, IPIC_SEMSR);
832 ipic_saved_state.secnr = ipic_read(ipic->regs, IPIC_SECNR);
833 ipic_saved_state.sermr = ipic_read(ipic->regs, IPIC_SERMR);
834 ipic_saved_state.sercr = ipic_read(ipic->regs, IPIC_SERCR);
835
836 if (fsl_deep_sleep()) {
837 /* In deep sleep, make sure there can be no
838 * pending interrupts, as this can cause
839 * problems on 831x.
840 */
841 ipic_write(ipic->regs, IPIC_SIMSR_H, 0);
842 ipic_write(ipic->regs, IPIC_SIMSR_L, 0);
843 ipic_write(ipic->regs, IPIC_SEMSR, 0);
844 ipic_write(ipic->regs, IPIC_SERMR, 0);
845 }
846
847 return 0;
848}
849
850static void ipic_resume(void)
851{
852 struct ipic *ipic = primary_ipic;
853
854 ipic_write(ipic->regs, IPIC_SICFR, ipic_saved_state.sicfr);
855 ipic_write(ipic->regs, IPIC_SIPRR_A, ipic_saved_state.siprr[0]);
856 ipic_write(ipic->regs, IPIC_SIPRR_D, ipic_saved_state.siprr[1]);
857 ipic_write(ipic->regs, IPIC_SIMSR_H, ipic_saved_state.simsr[0]);
858 ipic_write(ipic->regs, IPIC_SIMSR_L, ipic_saved_state.simsr[1]);
859 ipic_write(ipic->regs, IPIC_SICNR, ipic_saved_state.sicnr);
860 ipic_write(ipic->regs, IPIC_SMPRR_A, ipic_saved_state.smprr[0]);
861 ipic_write(ipic->regs, IPIC_SMPRR_B, ipic_saved_state.smprr[1]);
862 ipic_write(ipic->regs, IPIC_SEMSR, ipic_saved_state.semsr);
863 ipic_write(ipic->regs, IPIC_SECNR, ipic_saved_state.secnr);
864 ipic_write(ipic->regs, IPIC_SERMR, ipic_saved_state.sermr);
865 ipic_write(ipic->regs, IPIC_SERCR, ipic_saved_state.sercr);
866}
867#else
868#define ipic_suspend NULL
869#define ipic_resume NULL
870#endif
871
872static struct syscore_ops ipic_syscore_ops = {
873 .suspend = ipic_suspend,
874 .resume = ipic_resume,
875};
876
877static int __init init_ipic_syscore(void)
878{
879 if (!primary_ipic || !primary_ipic->regs)
880 return -ENODEV;
881
882 printk(KERN_DEBUG "Registering ipic system core operations\n");
883 register_syscore_ops(&ipic_syscore_ops);
884
885 return 0;
886}
887
888subsys_initcall(init_ipic_syscore);
1/*
2 * arch/powerpc/sysdev/ipic.c
3 *
4 * IPIC routines implementations.
5 *
6 * Copyright 2005 Freescale Semiconductor, Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 */
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/errno.h>
16#include <linux/reboot.h>
17#include <linux/slab.h>
18#include <linux/stddef.h>
19#include <linux/sched.h>
20#include <linux/signal.h>
21#include <linux/syscore_ops.h>
22#include <linux/device.h>
23#include <linux/spinlock.h>
24#include <linux/fsl_devices.h>
25#include <asm/irq.h>
26#include <asm/io.h>
27#include <asm/prom.h>
28#include <asm/ipic.h>
29
30#include "ipic.h"
31
32static struct ipic * primary_ipic;
33static struct irq_chip ipic_level_irq_chip, ipic_edge_irq_chip;
34static DEFINE_RAW_SPINLOCK(ipic_lock);
35
36static struct ipic_info ipic_info[] = {
37 [1] = {
38 .mask = IPIC_SIMSR_H,
39 .prio = IPIC_SIPRR_C,
40 .force = IPIC_SIFCR_H,
41 .bit = 16,
42 .prio_mask = 0,
43 },
44 [2] = {
45 .mask = IPIC_SIMSR_H,
46 .prio = IPIC_SIPRR_C,
47 .force = IPIC_SIFCR_H,
48 .bit = 17,
49 .prio_mask = 1,
50 },
51 [3] = {
52 .mask = IPIC_SIMSR_H,
53 .prio = IPIC_SIPRR_C,
54 .force = IPIC_SIFCR_H,
55 .bit = 18,
56 .prio_mask = 2,
57 },
58 [4] = {
59 .mask = IPIC_SIMSR_H,
60 .prio = IPIC_SIPRR_C,
61 .force = IPIC_SIFCR_H,
62 .bit = 19,
63 .prio_mask = 3,
64 },
65 [5] = {
66 .mask = IPIC_SIMSR_H,
67 .prio = IPIC_SIPRR_C,
68 .force = IPIC_SIFCR_H,
69 .bit = 20,
70 .prio_mask = 4,
71 },
72 [6] = {
73 .mask = IPIC_SIMSR_H,
74 .prio = IPIC_SIPRR_C,
75 .force = IPIC_SIFCR_H,
76 .bit = 21,
77 .prio_mask = 5,
78 },
79 [7] = {
80 .mask = IPIC_SIMSR_H,
81 .prio = IPIC_SIPRR_C,
82 .force = IPIC_SIFCR_H,
83 .bit = 22,
84 .prio_mask = 6,
85 },
86 [8] = {
87 .mask = IPIC_SIMSR_H,
88 .prio = IPIC_SIPRR_C,
89 .force = IPIC_SIFCR_H,
90 .bit = 23,
91 .prio_mask = 7,
92 },
93 [9] = {
94 .mask = IPIC_SIMSR_H,
95 .prio = IPIC_SIPRR_D,
96 .force = IPIC_SIFCR_H,
97 .bit = 24,
98 .prio_mask = 0,
99 },
100 [10] = {
101 .mask = IPIC_SIMSR_H,
102 .prio = IPIC_SIPRR_D,
103 .force = IPIC_SIFCR_H,
104 .bit = 25,
105 .prio_mask = 1,
106 },
107 [11] = {
108 .mask = IPIC_SIMSR_H,
109 .prio = IPIC_SIPRR_D,
110 .force = IPIC_SIFCR_H,
111 .bit = 26,
112 .prio_mask = 2,
113 },
114 [12] = {
115 .mask = IPIC_SIMSR_H,
116 .prio = IPIC_SIPRR_D,
117 .force = IPIC_SIFCR_H,
118 .bit = 27,
119 .prio_mask = 3,
120 },
121 [13] = {
122 .mask = IPIC_SIMSR_H,
123 .prio = IPIC_SIPRR_D,
124 .force = IPIC_SIFCR_H,
125 .bit = 28,
126 .prio_mask = 4,
127 },
128 [14] = {
129 .mask = IPIC_SIMSR_H,
130 .prio = IPIC_SIPRR_D,
131 .force = IPIC_SIFCR_H,
132 .bit = 29,
133 .prio_mask = 5,
134 },
135 [15] = {
136 .mask = IPIC_SIMSR_H,
137 .prio = IPIC_SIPRR_D,
138 .force = IPIC_SIFCR_H,
139 .bit = 30,
140 .prio_mask = 6,
141 },
142 [16] = {
143 .mask = IPIC_SIMSR_H,
144 .prio = IPIC_SIPRR_D,
145 .force = IPIC_SIFCR_H,
146 .bit = 31,
147 .prio_mask = 7,
148 },
149 [17] = {
150 .ack = IPIC_SEPNR,
151 .mask = IPIC_SEMSR,
152 .prio = IPIC_SMPRR_A,
153 .force = IPIC_SEFCR,
154 .bit = 1,
155 .prio_mask = 5,
156 },
157 [18] = {
158 .ack = IPIC_SEPNR,
159 .mask = IPIC_SEMSR,
160 .prio = IPIC_SMPRR_A,
161 .force = IPIC_SEFCR,
162 .bit = 2,
163 .prio_mask = 6,
164 },
165 [19] = {
166 .ack = IPIC_SEPNR,
167 .mask = IPIC_SEMSR,
168 .prio = IPIC_SMPRR_A,
169 .force = IPIC_SEFCR,
170 .bit = 3,
171 .prio_mask = 7,
172 },
173 [20] = {
174 .ack = IPIC_SEPNR,
175 .mask = IPIC_SEMSR,
176 .prio = IPIC_SMPRR_B,
177 .force = IPIC_SEFCR,
178 .bit = 4,
179 .prio_mask = 4,
180 },
181 [21] = {
182 .ack = IPIC_SEPNR,
183 .mask = IPIC_SEMSR,
184 .prio = IPIC_SMPRR_B,
185 .force = IPIC_SEFCR,
186 .bit = 5,
187 .prio_mask = 5,
188 },
189 [22] = {
190 .ack = IPIC_SEPNR,
191 .mask = IPIC_SEMSR,
192 .prio = IPIC_SMPRR_B,
193 .force = IPIC_SEFCR,
194 .bit = 6,
195 .prio_mask = 6,
196 },
197 [23] = {
198 .ack = IPIC_SEPNR,
199 .mask = IPIC_SEMSR,
200 .prio = IPIC_SMPRR_B,
201 .force = IPIC_SEFCR,
202 .bit = 7,
203 .prio_mask = 7,
204 },
205 [32] = {
206 .mask = IPIC_SIMSR_H,
207 .prio = IPIC_SIPRR_A,
208 .force = IPIC_SIFCR_H,
209 .bit = 0,
210 .prio_mask = 0,
211 },
212 [33] = {
213 .mask = IPIC_SIMSR_H,
214 .prio = IPIC_SIPRR_A,
215 .force = IPIC_SIFCR_H,
216 .bit = 1,
217 .prio_mask = 1,
218 },
219 [34] = {
220 .mask = IPIC_SIMSR_H,
221 .prio = IPIC_SIPRR_A,
222 .force = IPIC_SIFCR_H,
223 .bit = 2,
224 .prio_mask = 2,
225 },
226 [35] = {
227 .mask = IPIC_SIMSR_H,
228 .prio = IPIC_SIPRR_A,
229 .force = IPIC_SIFCR_H,
230 .bit = 3,
231 .prio_mask = 3,
232 },
233 [36] = {
234 .mask = IPIC_SIMSR_H,
235 .prio = IPIC_SIPRR_A,
236 .force = IPIC_SIFCR_H,
237 .bit = 4,
238 .prio_mask = 4,
239 },
240 [37] = {
241 .mask = IPIC_SIMSR_H,
242 .prio = IPIC_SIPRR_A,
243 .force = IPIC_SIFCR_H,
244 .bit = 5,
245 .prio_mask = 5,
246 },
247 [38] = {
248 .mask = IPIC_SIMSR_H,
249 .prio = IPIC_SIPRR_A,
250 .force = IPIC_SIFCR_H,
251 .bit = 6,
252 .prio_mask = 6,
253 },
254 [39] = {
255 .mask = IPIC_SIMSR_H,
256 .prio = IPIC_SIPRR_A,
257 .force = IPIC_SIFCR_H,
258 .bit = 7,
259 .prio_mask = 7,
260 },
261 [40] = {
262 .mask = IPIC_SIMSR_H,
263 .prio = IPIC_SIPRR_B,
264 .force = IPIC_SIFCR_H,
265 .bit = 8,
266 .prio_mask = 0,
267 },
268 [41] = {
269 .mask = IPIC_SIMSR_H,
270 .prio = IPIC_SIPRR_B,
271 .force = IPIC_SIFCR_H,
272 .bit = 9,
273 .prio_mask = 1,
274 },
275 [42] = {
276 .mask = IPIC_SIMSR_H,
277 .prio = IPIC_SIPRR_B,
278 .force = IPIC_SIFCR_H,
279 .bit = 10,
280 .prio_mask = 2,
281 },
282 [43] = {
283 .mask = IPIC_SIMSR_H,
284 .prio = IPIC_SIPRR_B,
285 .force = IPIC_SIFCR_H,
286 .bit = 11,
287 .prio_mask = 3,
288 },
289 [44] = {
290 .mask = IPIC_SIMSR_H,
291 .prio = IPIC_SIPRR_B,
292 .force = IPIC_SIFCR_H,
293 .bit = 12,
294 .prio_mask = 4,
295 },
296 [45] = {
297 .mask = IPIC_SIMSR_H,
298 .prio = IPIC_SIPRR_B,
299 .force = IPIC_SIFCR_H,
300 .bit = 13,
301 .prio_mask = 5,
302 },
303 [46] = {
304 .mask = IPIC_SIMSR_H,
305 .prio = IPIC_SIPRR_B,
306 .force = IPIC_SIFCR_H,
307 .bit = 14,
308 .prio_mask = 6,
309 },
310 [47] = {
311 .mask = IPIC_SIMSR_H,
312 .prio = IPIC_SIPRR_B,
313 .force = IPIC_SIFCR_H,
314 .bit = 15,
315 .prio_mask = 7,
316 },
317 [48] = {
318 .mask = IPIC_SEMSR,
319 .prio = IPIC_SMPRR_A,
320 .force = IPIC_SEFCR,
321 .bit = 0,
322 .prio_mask = 4,
323 },
324 [64] = {
325 .mask = IPIC_SIMSR_L,
326 .prio = IPIC_SMPRR_A,
327 .force = IPIC_SIFCR_L,
328 .bit = 0,
329 .prio_mask = 0,
330 },
331 [65] = {
332 .mask = IPIC_SIMSR_L,
333 .prio = IPIC_SMPRR_A,
334 .force = IPIC_SIFCR_L,
335 .bit = 1,
336 .prio_mask = 1,
337 },
338 [66] = {
339 .mask = IPIC_SIMSR_L,
340 .prio = IPIC_SMPRR_A,
341 .force = IPIC_SIFCR_L,
342 .bit = 2,
343 .prio_mask = 2,
344 },
345 [67] = {
346 .mask = IPIC_SIMSR_L,
347 .prio = IPIC_SMPRR_A,
348 .force = IPIC_SIFCR_L,
349 .bit = 3,
350 .prio_mask = 3,
351 },
352 [68] = {
353 .mask = IPIC_SIMSR_L,
354 .prio = IPIC_SMPRR_B,
355 .force = IPIC_SIFCR_L,
356 .bit = 4,
357 .prio_mask = 0,
358 },
359 [69] = {
360 .mask = IPIC_SIMSR_L,
361 .prio = IPIC_SMPRR_B,
362 .force = IPIC_SIFCR_L,
363 .bit = 5,
364 .prio_mask = 1,
365 },
366 [70] = {
367 .mask = IPIC_SIMSR_L,
368 .prio = IPIC_SMPRR_B,
369 .force = IPIC_SIFCR_L,
370 .bit = 6,
371 .prio_mask = 2,
372 },
373 [71] = {
374 .mask = IPIC_SIMSR_L,
375 .prio = IPIC_SMPRR_B,
376 .force = IPIC_SIFCR_L,
377 .bit = 7,
378 .prio_mask = 3,
379 },
380 [72] = {
381 .mask = IPIC_SIMSR_L,
382 .prio = 0,
383 .force = IPIC_SIFCR_L,
384 .bit = 8,
385 },
386 [73] = {
387 .mask = IPIC_SIMSR_L,
388 .prio = 0,
389 .force = IPIC_SIFCR_L,
390 .bit = 9,
391 },
392 [74] = {
393 .mask = IPIC_SIMSR_L,
394 .prio = 0,
395 .force = IPIC_SIFCR_L,
396 .bit = 10,
397 },
398 [75] = {
399 .mask = IPIC_SIMSR_L,
400 .prio = 0,
401 .force = IPIC_SIFCR_L,
402 .bit = 11,
403 },
404 [76] = {
405 .mask = IPIC_SIMSR_L,
406 .prio = 0,
407 .force = IPIC_SIFCR_L,
408 .bit = 12,
409 },
410 [77] = {
411 .mask = IPIC_SIMSR_L,
412 .prio = 0,
413 .force = IPIC_SIFCR_L,
414 .bit = 13,
415 },
416 [78] = {
417 .mask = IPIC_SIMSR_L,
418 .prio = 0,
419 .force = IPIC_SIFCR_L,
420 .bit = 14,
421 },
422 [79] = {
423 .mask = IPIC_SIMSR_L,
424 .prio = 0,
425 .force = IPIC_SIFCR_L,
426 .bit = 15,
427 },
428 [80] = {
429 .mask = IPIC_SIMSR_L,
430 .prio = 0,
431 .force = IPIC_SIFCR_L,
432 .bit = 16,
433 },
434 [81] = {
435 .mask = IPIC_SIMSR_L,
436 .prio = 0,
437 .force = IPIC_SIFCR_L,
438 .bit = 17,
439 },
440 [82] = {
441 .mask = IPIC_SIMSR_L,
442 .prio = 0,
443 .force = IPIC_SIFCR_L,
444 .bit = 18,
445 },
446 [83] = {
447 .mask = IPIC_SIMSR_L,
448 .prio = 0,
449 .force = IPIC_SIFCR_L,
450 .bit = 19,
451 },
452 [84] = {
453 .mask = IPIC_SIMSR_L,
454 .prio = 0,
455 .force = IPIC_SIFCR_L,
456 .bit = 20,
457 },
458 [85] = {
459 .mask = IPIC_SIMSR_L,
460 .prio = 0,
461 .force = IPIC_SIFCR_L,
462 .bit = 21,
463 },
464 [86] = {
465 .mask = IPIC_SIMSR_L,
466 .prio = 0,
467 .force = IPIC_SIFCR_L,
468 .bit = 22,
469 },
470 [87] = {
471 .mask = IPIC_SIMSR_L,
472 .prio = 0,
473 .force = IPIC_SIFCR_L,
474 .bit = 23,
475 },
476 [88] = {
477 .mask = IPIC_SIMSR_L,
478 .prio = 0,
479 .force = IPIC_SIFCR_L,
480 .bit = 24,
481 },
482 [89] = {
483 .mask = IPIC_SIMSR_L,
484 .prio = 0,
485 .force = IPIC_SIFCR_L,
486 .bit = 25,
487 },
488 [90] = {
489 .mask = IPIC_SIMSR_L,
490 .prio = 0,
491 .force = IPIC_SIFCR_L,
492 .bit = 26,
493 },
494 [91] = {
495 .mask = IPIC_SIMSR_L,
496 .prio = 0,
497 .force = IPIC_SIFCR_L,
498 .bit = 27,
499 },
500 [94] = {
501 .mask = IPIC_SIMSR_L,
502 .prio = 0,
503 .force = IPIC_SIFCR_L,
504 .bit = 30,
505 },
506};
507
508static inline u32 ipic_read(volatile u32 __iomem *base, unsigned int reg)
509{
510 return in_be32(base + (reg >> 2));
511}
512
513static inline void ipic_write(volatile u32 __iomem *base, unsigned int reg, u32 value)
514{
515 out_be32(base + (reg >> 2), value);
516}
517
518static inline struct ipic * ipic_from_irq(unsigned int virq)
519{
520 return primary_ipic;
521}
522
523static void ipic_unmask_irq(struct irq_data *d)
524{
525 struct ipic *ipic = ipic_from_irq(d->irq);
526 unsigned int src = irqd_to_hwirq(d);
527 unsigned long flags;
528 u32 temp;
529
530 raw_spin_lock_irqsave(&ipic_lock, flags);
531
532 temp = ipic_read(ipic->regs, ipic_info[src].mask);
533 temp |= (1 << (31 - ipic_info[src].bit));
534 ipic_write(ipic->regs, ipic_info[src].mask, temp);
535
536 raw_spin_unlock_irqrestore(&ipic_lock, flags);
537}
538
539static void ipic_mask_irq(struct irq_data *d)
540{
541 struct ipic *ipic = ipic_from_irq(d->irq);
542 unsigned int src = irqd_to_hwirq(d);
543 unsigned long flags;
544 u32 temp;
545
546 raw_spin_lock_irqsave(&ipic_lock, flags);
547
548 temp = ipic_read(ipic->regs, ipic_info[src].mask);
549 temp &= ~(1 << (31 - ipic_info[src].bit));
550 ipic_write(ipic->regs, ipic_info[src].mask, temp);
551
552 /* mb() can't guarantee that masking is finished. But it does finish
553 * for nearly all cases. */
554 mb();
555
556 raw_spin_unlock_irqrestore(&ipic_lock, flags);
557}
558
559static void ipic_ack_irq(struct irq_data *d)
560{
561 struct ipic *ipic = ipic_from_irq(d->irq);
562 unsigned int src = irqd_to_hwirq(d);
563 unsigned long flags;
564 u32 temp;
565
566 raw_spin_lock_irqsave(&ipic_lock, flags);
567
568 temp = 1 << (31 - ipic_info[src].bit);
569 ipic_write(ipic->regs, ipic_info[src].ack, temp);
570
571 /* mb() can't guarantee that ack is finished. But it does finish
572 * for nearly all cases. */
573 mb();
574
575 raw_spin_unlock_irqrestore(&ipic_lock, flags);
576}
577
578static void ipic_mask_irq_and_ack(struct irq_data *d)
579{
580 struct ipic *ipic = ipic_from_irq(d->irq);
581 unsigned int src = irqd_to_hwirq(d);
582 unsigned long flags;
583 u32 temp;
584
585 raw_spin_lock_irqsave(&ipic_lock, flags);
586
587 temp = ipic_read(ipic->regs, ipic_info[src].mask);
588 temp &= ~(1 << (31 - ipic_info[src].bit));
589 ipic_write(ipic->regs, ipic_info[src].mask, temp);
590
591 temp = 1 << (31 - ipic_info[src].bit);
592 ipic_write(ipic->regs, ipic_info[src].ack, temp);
593
594 /* mb() can't guarantee that ack is finished. But it does finish
595 * for nearly all cases. */
596 mb();
597
598 raw_spin_unlock_irqrestore(&ipic_lock, flags);
599}
600
601static int ipic_set_irq_type(struct irq_data *d, unsigned int flow_type)
602{
603 struct ipic *ipic = ipic_from_irq(d->irq);
604 unsigned int src = irqd_to_hwirq(d);
605 unsigned int vold, vnew, edibit;
606
607 if (flow_type == IRQ_TYPE_NONE)
608 flow_type = IRQ_TYPE_LEVEL_LOW;
609
610 /* ipic supports only low assertion and high-to-low change senses
611 */
612 if (!(flow_type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING))) {
613 printk(KERN_ERR "ipic: sense type 0x%x not supported\n",
614 flow_type);
615 return -EINVAL;
616 }
617 /* ipic supports only edge mode on external interrupts */
618 if ((flow_type & IRQ_TYPE_EDGE_FALLING) && !ipic_info[src].ack) {
619 printk(KERN_ERR "ipic: edge sense not supported on internal "
620 "interrupts\n");
621 return -EINVAL;
622
623 }
624
625 irqd_set_trigger_type(d, flow_type);
626 if (flow_type & IRQ_TYPE_LEVEL_LOW) {
627 irq_set_handler_locked(d, handle_level_irq);
628 d->chip = &ipic_level_irq_chip;
629 } else {
630 irq_set_handler_locked(d, handle_edge_irq);
631 d->chip = &ipic_edge_irq_chip;
632 }
633
634 /* only EXT IRQ senses are programmable on ipic
635 * internal IRQ senses are LEVEL_LOW
636 */
637 if (src == IPIC_IRQ_EXT0)
638 edibit = 15;
639 else
640 if (src >= IPIC_IRQ_EXT1 && src <= IPIC_IRQ_EXT7)
641 edibit = (14 - (src - IPIC_IRQ_EXT1));
642 else
643 return (flow_type & IRQ_TYPE_LEVEL_LOW) ? 0 : -EINVAL;
644
645 vold = ipic_read(ipic->regs, IPIC_SECNR);
646 if ((flow_type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_FALLING) {
647 vnew = vold | (1 << edibit);
648 } else {
649 vnew = vold & ~(1 << edibit);
650 }
651 if (vold != vnew)
652 ipic_write(ipic->regs, IPIC_SECNR, vnew);
653 return IRQ_SET_MASK_OK_NOCOPY;
654}
655
656/* level interrupts and edge interrupts have different ack operations */
657static struct irq_chip ipic_level_irq_chip = {
658 .name = "IPIC",
659 .irq_unmask = ipic_unmask_irq,
660 .irq_mask = ipic_mask_irq,
661 .irq_mask_ack = ipic_mask_irq,
662 .irq_set_type = ipic_set_irq_type,
663};
664
665static struct irq_chip ipic_edge_irq_chip = {
666 .name = "IPIC",
667 .irq_unmask = ipic_unmask_irq,
668 .irq_mask = ipic_mask_irq,
669 .irq_mask_ack = ipic_mask_irq_and_ack,
670 .irq_ack = ipic_ack_irq,
671 .irq_set_type = ipic_set_irq_type,
672};
673
674static int ipic_host_match(struct irq_domain *h, struct device_node *node,
675 enum irq_domain_bus_token bus_token)
676{
677 /* Exact match, unless ipic node is NULL */
678 struct device_node *of_node = irq_domain_get_of_node(h);
679 return of_node == NULL || of_node == node;
680}
681
682static int ipic_host_map(struct irq_domain *h, unsigned int virq,
683 irq_hw_number_t hw)
684{
685 struct ipic *ipic = h->host_data;
686
687 irq_set_chip_data(virq, ipic);
688 irq_set_chip_and_handler(virq, &ipic_level_irq_chip, handle_level_irq);
689
690 /* Set default irq type */
691 irq_set_irq_type(virq, IRQ_TYPE_NONE);
692
693 return 0;
694}
695
696static const struct irq_domain_ops ipic_host_ops = {
697 .match = ipic_host_match,
698 .map = ipic_host_map,
699 .xlate = irq_domain_xlate_onetwocell,
700};
701
702struct ipic * __init ipic_init(struct device_node *node, unsigned int flags)
703{
704 struct ipic *ipic;
705 struct resource res;
706 u32 temp = 0, ret;
707
708 ret = of_address_to_resource(node, 0, &res);
709 if (ret)
710 return NULL;
711
712 ipic = kzalloc(sizeof(*ipic), GFP_KERNEL);
713 if (ipic == NULL)
714 return NULL;
715
716 ipic->irqhost = irq_domain_add_linear(node, NR_IPIC_INTS,
717 &ipic_host_ops, ipic);
718 if (ipic->irqhost == NULL) {
719 kfree(ipic);
720 return NULL;
721 }
722
723 ipic->regs = ioremap(res.start, resource_size(&res));
724
725 /* init hw */
726 ipic_write(ipic->regs, IPIC_SICNR, 0x0);
727
728 /* default priority scheme is grouped. If spread mode is required
729 * configure SICFR accordingly */
730 if (flags & IPIC_SPREADMODE_GRP_A)
731 temp |= SICFR_IPSA;
732 if (flags & IPIC_SPREADMODE_GRP_B)
733 temp |= SICFR_IPSB;
734 if (flags & IPIC_SPREADMODE_GRP_C)
735 temp |= SICFR_IPSC;
736 if (flags & IPIC_SPREADMODE_GRP_D)
737 temp |= SICFR_IPSD;
738 if (flags & IPIC_SPREADMODE_MIX_A)
739 temp |= SICFR_MPSA;
740 if (flags & IPIC_SPREADMODE_MIX_B)
741 temp |= SICFR_MPSB;
742
743 ipic_write(ipic->regs, IPIC_SICFR, temp);
744
745 /* handle MCP route */
746 temp = 0;
747 if (flags & IPIC_DISABLE_MCP_OUT)
748 temp = SERCR_MCPR;
749 ipic_write(ipic->regs, IPIC_SERCR, temp);
750
751 /* handle routing of IRQ0 to MCP */
752 temp = ipic_read(ipic->regs, IPIC_SEMSR);
753
754 if (flags & IPIC_IRQ0_MCP)
755 temp |= SEMSR_SIRQ0;
756 else
757 temp &= ~SEMSR_SIRQ0;
758
759 ipic_write(ipic->regs, IPIC_SEMSR, temp);
760
761 primary_ipic = ipic;
762 irq_set_default_host(primary_ipic->irqhost);
763
764 ipic_write(ipic->regs, IPIC_SIMSR_H, 0);
765 ipic_write(ipic->regs, IPIC_SIMSR_L, 0);
766
767 printk ("IPIC (%d IRQ sources) at %p\n", NR_IPIC_INTS,
768 primary_ipic->regs);
769
770 return ipic;
771}
772
773int ipic_set_priority(unsigned int virq, unsigned int priority)
774{
775 struct ipic *ipic = ipic_from_irq(virq);
776 unsigned int src = virq_to_hw(virq);
777 u32 temp;
778
779 if (priority > 7)
780 return -EINVAL;
781 if (src > 127)
782 return -EINVAL;
783 if (ipic_info[src].prio == 0)
784 return -EINVAL;
785
786 temp = ipic_read(ipic->regs, ipic_info[src].prio);
787
788 if (priority < 4) {
789 temp &= ~(0x7 << (20 + (3 - priority) * 3));
790 temp |= ipic_info[src].prio_mask << (20 + (3 - priority) * 3);
791 } else {
792 temp &= ~(0x7 << (4 + (7 - priority) * 3));
793 temp |= ipic_info[src].prio_mask << (4 + (7 - priority) * 3);
794 }
795
796 ipic_write(ipic->regs, ipic_info[src].prio, temp);
797
798 return 0;
799}
800
801void ipic_set_highest_priority(unsigned int virq)
802{
803 struct ipic *ipic = ipic_from_irq(virq);
804 unsigned int src = virq_to_hw(virq);
805 u32 temp;
806
807 temp = ipic_read(ipic->regs, IPIC_SICFR);
808
809 /* clear and set HPI */
810 temp &= 0x7f000000;
811 temp |= (src & 0x7f) << 24;
812
813 ipic_write(ipic->regs, IPIC_SICFR, temp);
814}
815
816void ipic_set_default_priority(void)
817{
818 ipic_write(primary_ipic->regs, IPIC_SIPRR_A, IPIC_PRIORITY_DEFAULT);
819 ipic_write(primary_ipic->regs, IPIC_SIPRR_B, IPIC_PRIORITY_DEFAULT);
820 ipic_write(primary_ipic->regs, IPIC_SIPRR_C, IPIC_PRIORITY_DEFAULT);
821 ipic_write(primary_ipic->regs, IPIC_SIPRR_D, IPIC_PRIORITY_DEFAULT);
822 ipic_write(primary_ipic->regs, IPIC_SMPRR_A, IPIC_PRIORITY_DEFAULT);
823 ipic_write(primary_ipic->regs, IPIC_SMPRR_B, IPIC_PRIORITY_DEFAULT);
824}
825
826void ipic_enable_mcp(enum ipic_mcp_irq mcp_irq)
827{
828 struct ipic *ipic = primary_ipic;
829 u32 temp;
830
831 temp = ipic_read(ipic->regs, IPIC_SERMR);
832 temp |= (1 << (31 - mcp_irq));
833 ipic_write(ipic->regs, IPIC_SERMR, temp);
834}
835
836void ipic_disable_mcp(enum ipic_mcp_irq mcp_irq)
837{
838 struct ipic *ipic = primary_ipic;
839 u32 temp;
840
841 temp = ipic_read(ipic->regs, IPIC_SERMR);
842 temp &= (1 << (31 - mcp_irq));
843 ipic_write(ipic->regs, IPIC_SERMR, temp);
844}
845
846u32 ipic_get_mcp_status(void)
847{
848 return ipic_read(primary_ipic->regs, IPIC_SERMR);
849}
850
851void ipic_clear_mcp_status(u32 mask)
852{
853 ipic_write(primary_ipic->regs, IPIC_SERMR, mask);
854}
855
856/* Return an interrupt vector or NO_IRQ if no interrupt is pending. */
857unsigned int ipic_get_irq(void)
858{
859 int irq;
860
861 BUG_ON(primary_ipic == NULL);
862
863#define IPIC_SIVCR_VECTOR_MASK 0x7f
864 irq = ipic_read(primary_ipic->regs, IPIC_SIVCR) & IPIC_SIVCR_VECTOR_MASK;
865
866 if (irq == 0) /* 0 --> no irq is pending */
867 return NO_IRQ;
868
869 return irq_linear_revmap(primary_ipic->irqhost, irq);
870}
871
872#ifdef CONFIG_SUSPEND
873static struct {
874 u32 sicfr;
875 u32 siprr[2];
876 u32 simsr[2];
877 u32 sicnr;
878 u32 smprr[2];
879 u32 semsr;
880 u32 secnr;
881 u32 sermr;
882 u32 sercr;
883} ipic_saved_state;
884
885static int ipic_suspend(void)
886{
887 struct ipic *ipic = primary_ipic;
888
889 ipic_saved_state.sicfr = ipic_read(ipic->regs, IPIC_SICFR);
890 ipic_saved_state.siprr[0] = ipic_read(ipic->regs, IPIC_SIPRR_A);
891 ipic_saved_state.siprr[1] = ipic_read(ipic->regs, IPIC_SIPRR_D);
892 ipic_saved_state.simsr[0] = ipic_read(ipic->regs, IPIC_SIMSR_H);
893 ipic_saved_state.simsr[1] = ipic_read(ipic->regs, IPIC_SIMSR_L);
894 ipic_saved_state.sicnr = ipic_read(ipic->regs, IPIC_SICNR);
895 ipic_saved_state.smprr[0] = ipic_read(ipic->regs, IPIC_SMPRR_A);
896 ipic_saved_state.smprr[1] = ipic_read(ipic->regs, IPIC_SMPRR_B);
897 ipic_saved_state.semsr = ipic_read(ipic->regs, IPIC_SEMSR);
898 ipic_saved_state.secnr = ipic_read(ipic->regs, IPIC_SECNR);
899 ipic_saved_state.sermr = ipic_read(ipic->regs, IPIC_SERMR);
900 ipic_saved_state.sercr = ipic_read(ipic->regs, IPIC_SERCR);
901
902 if (fsl_deep_sleep()) {
903 /* In deep sleep, make sure there can be no
904 * pending interrupts, as this can cause
905 * problems on 831x.
906 */
907 ipic_write(ipic->regs, IPIC_SIMSR_H, 0);
908 ipic_write(ipic->regs, IPIC_SIMSR_L, 0);
909 ipic_write(ipic->regs, IPIC_SEMSR, 0);
910 ipic_write(ipic->regs, IPIC_SERMR, 0);
911 }
912
913 return 0;
914}
915
916static void ipic_resume(void)
917{
918 struct ipic *ipic = primary_ipic;
919
920 ipic_write(ipic->regs, IPIC_SICFR, ipic_saved_state.sicfr);
921 ipic_write(ipic->regs, IPIC_SIPRR_A, ipic_saved_state.siprr[0]);
922 ipic_write(ipic->regs, IPIC_SIPRR_D, ipic_saved_state.siprr[1]);
923 ipic_write(ipic->regs, IPIC_SIMSR_H, ipic_saved_state.simsr[0]);
924 ipic_write(ipic->regs, IPIC_SIMSR_L, ipic_saved_state.simsr[1]);
925 ipic_write(ipic->regs, IPIC_SICNR, ipic_saved_state.sicnr);
926 ipic_write(ipic->regs, IPIC_SMPRR_A, ipic_saved_state.smprr[0]);
927 ipic_write(ipic->regs, IPIC_SMPRR_B, ipic_saved_state.smprr[1]);
928 ipic_write(ipic->regs, IPIC_SEMSR, ipic_saved_state.semsr);
929 ipic_write(ipic->regs, IPIC_SECNR, ipic_saved_state.secnr);
930 ipic_write(ipic->regs, IPIC_SERMR, ipic_saved_state.sermr);
931 ipic_write(ipic->regs, IPIC_SERCR, ipic_saved_state.sercr);
932}
933#else
934#define ipic_suspend NULL
935#define ipic_resume NULL
936#endif
937
938static struct syscore_ops ipic_syscore_ops = {
939 .suspend = ipic_suspend,
940 .resume = ipic_resume,
941};
942
943static int __init init_ipic_syscore(void)
944{
945 if (!primary_ipic || !primary_ipic->regs)
946 return -ENODEV;
947
948 printk(KERN_DEBUG "Registering ipic system core operations\n");
949 register_syscore_ops(&ipic_syscore_ops);
950
951 return 0;
952}
953
954subsys_initcall(init_ipic_syscore);