summaryrefslogtreecommitdiff
path: root/drivers/sh/intc.c
blob: 559b5fe9dc0fd0ad7c6b96db9f5427fc76ccb0eb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
/*
 * Shared interrupt handling code for IPR and INTC2 types of IRQs.
 *
 * Copyright (C) 2007, 2008 Magnus Damm
 *
 * Based on intc2.c and ipr.c
 *
 * Copyright (C) 1999  Niibe Yutaka & Takeshi Yaegashi
 * Copyright (C) 2000  Kazumoto Kojima
 * Copyright (C) 2001  David J. Mckay (david.mckay@st.com)
 * Copyright (C) 2003  Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp>
 * Copyright (C) 2005, 2006  Paul Mundt
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/sh_intc.h>
#include <linux/sysdev.h>
#include <linux/list.h>
#include <linux/topology.h>

#define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \
	((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \
	 ((addr_e) << 16) | ((addr_d << 24)))

#define _INTC_SHIFT(h) (h & 0x1f)
#define _INTC_WIDTH(h) ((h >> 5) & 0xf)
#define _INTC_FN(h) ((h >> 9) & 0xf)
#define _INTC_MODE(h) ((h >> 13) & 0x7)
#define _INTC_ADDR_E(h) ((h >> 16) & 0xff)
#define _INTC_ADDR_D(h) ((h >> 24) & 0xff)

struct intc_handle_int {
	unsigned int irq;
	unsigned long handle;
};

struct intc_desc_int {
	struct list_head list;
	struct sys_device sysdev;
	pm_message_t state;
	unsigned long *reg;
#ifdef CONFIG_SMP
	unsigned long *smp;
#endif
	unsigned int nr_reg;
	struct intc_handle_int *prio;
	unsigned int nr_prio;
	struct intc_handle_int *sense;
	unsigned int nr_sense;
	struct irq_chip chip;
};

static LIST_HEAD(intc_list);

#ifdef CONFIG_SMP
#define IS_SMP(x) x.smp
#define INTC_REG(d, x, c) (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))
#define SMP_NR(d, x) ((d->smp[(x)] >> 8) ? (d->smp[(x)] >> 8) : 1)
#else
#define IS_SMP(x) 0
#define INTC_REG(d, x, c) (d->reg[(x)])
#define SMP_NR(d, x) 1
#endif

static unsigned int intc_prio_level[NR_IRQS]; /* for now */
#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
static unsigned long ack_handle[NR_IRQS];
#endif

static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
{
	struct irq_chip *chip = get_irq_chip(irq);
	return container_of(chip, struct intc_desc_int, chip);
}

static inline unsigned int set_field(unsigned int value,
				     unsigned int field_value,
				     unsigned int handle)
{
	unsigned int width = _INTC_WIDTH(handle);
	unsigned int shift = _INTC_SHIFT(handle);

	value &= ~(((1 << width) - 1) << shift);
	value |= field_value << shift;
	return value;
}

static void write_8(unsigned long addr, unsigned long h, unsigned long data)
{
	__raw_writeb(set_field(0, data, h), addr);
	(void)__raw_readb(addr);	/* Defeat write posting */
}

static void write_16(unsigned long addr, unsigned long h, unsigned long data)
{
	__raw_writew(set_field(0, data, h), addr);
	(void)__raw_readw(addr);	/* Defeat write posting */
}

static void write_32(unsigned long addr, unsigned long h, unsigned long data)
{
	__raw_writel(set_field(0, data, h), addr);
	(void)__raw_readl(addr);	/* Defeat write posting */
}

static void modify_8(unsigned long addr, unsigned long h, unsigned long data)
{
	unsigned long flags;
	local_irq_save(flags);
	__raw_writeb(set_field(__raw_readb(addr), data, h), addr);
	(void)__raw_readb(addr);	/* Defeat write posting */
	local_irq_restore(flags);
}

static void modify_16(unsigned long addr, unsigned long h, unsigned long data)
{
	unsigned long flags;
	local_irq_save(flags);
	__raw_writew(set_field(__raw_readw(addr), data, h), addr);
	(void)__raw_readw(addr);	/* Defeat write posting */
	local_irq_restore(flags);
}

static void modify_32(unsigned long addr, unsigned long h, unsigned long data)
{
	unsigned long flags;
	local_irq_save(flags);
	__raw_writel(set_field(__raw_readl(addr), data, h), addr);
	(void)__raw_readl(addr);	/* Defeat write posting */
	local_irq_restore(flags);
}

enum {	REG_FN_ERR = 0, REG_FN_WRITE_BASE = 1, REG_FN_MODIFY_BASE = 5 };

static void (*intc_reg_fns[])(unsigned long addr,
			      unsigned long h,
			      unsigned long data) = {
	[REG_FN_WRITE_BASE + 0] = write_8,
	[REG_FN_WRITE_BASE + 1] = write_16,
	[REG_FN_WRITE_BASE + 3] = write_32,
	[REG_FN_MODIFY_BASE + 0] = modify_8,
	[REG_FN_MODIFY_BASE + 1] = modify_16,
	[REG_FN_MODIFY_BASE + 3] = modify_32,
};

enum {	MODE_ENABLE_REG = 0, /* Bit(s) set -> interrupt enabled */
	MODE_MASK_REG,       /* Bit(s) set -> interrupt disabled */
	MODE_DUAL_REG,       /* Two registers, set bit to enable / disable */
	MODE_PRIO_REG,       /* Priority value written to enable interrupt */
	MODE_PCLR_REG,       /* Above plus all bits set to disable interrupt */
};

static void intc_mode_field(unsigned long addr,
			    unsigned long handle,
			    void (*fn)(unsigned long,
				       unsigned long,
				       unsigned long),
			    unsigned int irq)
{
	fn(addr, handle, ((1 << _INTC_WIDTH(handle)) - 1));
}

static void intc_mode_zero(unsigned long addr,
			   unsigned long handle,
			   void (*fn)(unsigned long,
				       unsigned long,
				       unsigned long),
			   unsigned int irq)
{
	fn(addr, handle, 0);
}

static void intc_mode_prio(unsigned long addr,
			   unsigned long handle,
			   void (*fn)(unsigned long,
				       unsigned long,
				       unsigned long),
			   unsigned int irq)
{
	fn(addr, handle, intc_prio_level[irq]);
}

static void (*intc_enable_fns[])(unsigned long addr,
				 unsigned long handle,
				 void (*fn)(unsigned long,
					    unsigned long,
					    unsigned long),
				 unsigned int irq) = {
	[MODE_ENABLE_REG] = intc_mode_field,
	[MODE_MASK_REG] = intc_mode_zero,
	[MODE_DUAL_REG] = intc_mode_field,
	[MODE_PRIO_REG] = intc_mode_prio,
	[MODE_PCLR_REG] = intc_mode_prio,
};

static void (*intc_disable_fns[])(unsigned long addr,
				  unsigned long handle,
				  void (*fn)(unsigned long,
					     unsigned long,
					     unsigned long),
				  unsigned int irq) = {
	[MODE_ENABLE_REG] = intc_mode_zero,
	[MODE_MASK_REG] = intc_mode_field,
	[MODE_DUAL_REG] = intc_mode_field,
	[MODE_PRIO_REG] = intc_mode_zero,
	[MODE_PCLR_REG] = intc_mode_field,
};

static inline void _intc_enable(unsigned int irq, unsigned long handle)
{
	struct intc_desc_int *d = get_intc_desc(irq);
	unsigned long addr;
	unsigned int cpu;

	for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_E(handle)); cpu++) {
		addr = INTC_REG(d, _INTC_ADDR_E(handle), cpu);
		intc_enable_fns[_INTC_MODE(handle)](addr, handle, intc_reg_fns\
						    [_INTC_FN(handle)], irq);
	}
}

static void intc_enable(unsigned int irq)
{
	_intc_enable(irq, (unsigned long)get_irq_chip_data(irq));
}

static void intc_disable(unsigned int irq)
{
	struct intc_desc_int *d = get_intc_desc(irq);
	unsigned long handle = (unsigned long) get_irq_chip_data(irq);
	unsigned long addr;
	unsigned int cpu;

	for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_D(handle)); cpu++) {
		addr = INTC_REG(d, _INTC_ADDR_D(handle), cpu);
		intc_disable_fns[_INTC_MODE(handle)](addr, handle,intc_reg_fns\
						     [_INTC_FN(handle)], irq);
	}
}

static int intc_set_wake(unsigned int irq, unsigned int on)
{
	return 0; /* allow wakeup, but setup hardware in intc_suspend() */
}

#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
static void intc_mask_ack(unsigned int irq)
{
	struct intc_desc_int *d = get_intc_desc(irq);
	unsigned long handle = ack_handle[irq];
	unsigned long addr;

	intc_disable(irq);

	/* read register and write zero only to the assocaited bit */

	if (handle) {
		addr = INTC_REG(d, _INTC_ADDR_D(handle), 0);
		switch (_INTC_FN(handle)) {
		case REG_FN_MODIFY_BASE + 0:	/* 8bit */
			__raw_readb(addr);
			__raw_writeb(0xff ^ set_field(0, 1, handle), addr);
			break;
		case REG_FN_MODIFY_BASE + 1:	/* 16bit */
			__raw_readw(addr);
			__raw_writew(0xffff ^ set_field(0, 1, handle), addr);
			break;
		case REG_FN_MODIFY_BASE + 3:	/* 32bit */
			__raw_readl(addr);
			__raw_writel(0xffffffff ^ set_field(0, 1, handle), addr);
			break;
		default:
			BUG();
			break;
		}
	}
}
#endif

static struct intc_handle_int *intc_find_irq(struct intc_handle_int *hp,
					     unsigned int nr_hp,
					     unsigned int irq)
{
	int i;

	/* this doesn't scale well, but...
	 *
	 * this function should only be used for cerain uncommon
	 * operations such as intc_set_priority() and intc_set_sense()
	 * and in those rare cases performance doesn't matter that much.
	 * keeping the memory footprint low is more important.
	 *
	 * one rather simple way to speed this up and still keep the
	 * memory footprint down is to make sure the array is sorted
	 * and then perform a bisect to lookup the irq.
	 */

	for (i = 0; i < nr_hp; i++) {
		if ((hp + i)->irq != irq)
			continue;

		return hp + i;
	}

	return NULL;
}

int intc_set_priority(unsigned int irq, unsigned int prio)
{
	struct intc_desc_int *d = get_intc_desc(irq);
	struct intc_handle_int *ihp;

	if (!intc_prio_level[irq] || prio <= 1)
		return -EINVAL;

	ihp = intc_find_irq(d->prio, d->nr_prio, irq);
	if (ihp) {
		if (prio >= (1 << _INTC_WIDTH(ihp->handle)))
			return -EINVAL;

		intc_prio_level[irq] = prio;

		/*
		 * only set secondary masking method directly
		 * primary masking method is using intc_prio_level[irq]
		 * priority level will be set during next enable()
		 */

		if (_INTC_FN(ihp->handle) != REG_FN_ERR)
			_intc_enable(irq, ihp->handle);
	}
	return 0;
}

#define VALID(x) (x | 0x80)

static unsigned char intc_irq_sense_table[IRQ_TYPE_SENSE_MASK + 1] = {
	[IRQ_TYPE_EDGE_FALLING] = VALID(0),
	[IRQ_TYPE_EDGE_RISING] = VALID(1),
	[IRQ_TYPE_LEVEL_LOW] = VALID(2),
	/* SH7706, SH7707 and SH7709 do not support high level triggered */
#if !defined(CONFIG_CPU_SUBTYPE_SH7706) && \
    !defined(CONFIG_CPU_SUBTYPE_SH7707) && \
    !defined(CONFIG_CPU_SUBTYPE_SH7709)
	[IRQ_TYPE_LEVEL_HIGH] = VALID(3),
#endif
};

static int intc_set_sense(unsigned int irq, unsigned int type)
{
	struct intc_desc_int *d = get_intc_desc(irq);
	unsigned char value = intc_irq_sense_table[type & IRQ_TYPE_SENSE_MASK];
	struct intc_handle_int *ihp;
	unsigned long addr;

	if (!value)
		return -EINVAL;

	ihp = intc_find_irq(d->sense, d->nr_sense, irq);
	if (ihp) {
		addr = INTC_REG(d, _INTC_ADDR_E(ihp->handle), 0);
		intc_reg_fns[_INTC_FN(ihp->handle)](addr, ihp->handle, value);
	}
	return 0;
}

static unsigned int __init intc_get_reg(struct intc_desc_int *d,
				 unsigned long address)
{
	unsigned int k;

	for (k = 0; k < d->nr_reg; k++) {
		if (d->reg[k] == address)
			return k;
	}

	BUG();
	return 0;
}

static intc_enum __init intc_grp_id(struct intc_desc *desc,
				    intc_enum enum_id)
{
	struct intc_group *g = desc->groups;
	unsigned int i, j;

	for (i = 0; g && enum_id && i < desc->nr_groups; i++) {
		g = desc->groups + i;

		for (j = 0; g->enum_ids[j]; j++) {
			if (g->enum_ids[j] != enum_id)
				continue;

			return g->enum_id;
		}
	}

	return 0;
}

static unsigned int __init intc_mask_data(struct intc_desc *desc,
					  struct intc_desc_int *d,
					  intc_enum enum_id, int do_grps)
{
	struct intc_mask_reg *mr = desc->mask_regs;
	unsigned int i, j, fn, mode;
	unsigned long reg_e, reg_d;

	for (i = 0; mr && enum_id && i < desc->nr_mask_regs; i++) {
		mr = desc->mask_regs + i;

		for (j = 0; j < ARRAY_SIZE(mr->enum_ids); j++) {
			if (mr->enum_ids[j] != enum_id)
				continue;

			if (mr->set_reg && mr->clr_reg) {
				fn = REG_FN_WRITE_BASE;
				mode = MODE_DUAL_REG;
				reg_e = mr->clr_reg;
				reg_d = mr->set_reg;
			} else {
				fn = REG_FN_MODIFY_BASE;
				if (mr->set_reg) {
					mode = MODE_ENABLE_REG;
					reg_e = mr->set_reg;
					reg_d = mr->set_reg;
				} else {
					mode = MODE_MASK_REG;
					reg_e = mr->clr_reg;
					reg_d = mr->clr_reg;
				}
			}

			fn += (mr->reg_width >> 3) - 1;
			return _INTC_MK(fn, mode,
					intc_get_reg(d, reg_e),
					intc_get_reg(d, reg_d),
					1,
					(mr->reg_width - 1) - j);
		}
	}

	if (do_grps)
		return intc_mask_data(desc, d, intc_grp_id(desc, enum_id), 0);

	return 0;
}

static unsigned int __init intc_prio_data(struct intc_desc *desc,
					  struct intc_desc_int *d,
					  intc_enum enum_id, int do_grps)
{
	struct intc_prio_reg *pr = desc->prio_regs;
	unsigned int i, j, fn, mode, bit;
	unsigned long reg_e, reg_d;

	for (i = 0; pr && enum_id && i < desc->nr_prio_regs; i++) {
		pr = desc->prio_regs + i;

		for (j = 0; j < ARRAY_SIZE(pr->enum_ids); j++) {
			if (pr->enum_ids[j] != enum_id)
				continue;

			if (pr->set_reg && pr->clr_reg) {
				fn = REG_FN_WRITE_BASE;
				mode = MODE_PCLR_REG;
				reg_e = pr->set_reg;
				reg_d = pr->clr_reg;
			} else {
				fn = REG_FN_MODIFY_BASE;
				mode = MODE_PRIO_REG;
				if (!pr->set_reg)
					BUG();
				reg_e = pr->set_reg;
				reg_d = pr->set_reg;
			}

			fn += (pr->reg_width >> 3) - 1;

			BUG_ON((j + 1) * pr->field_width > pr->reg_width);

			bit = pr->reg_width - ((j + 1) * pr->field_width);

			return _INTC_MK(fn, mode,
					intc_get_reg(d, reg_e),
					intc_get_reg(d, reg_d),
					pr->field_width, bit);
		}
	}

	if (do_grps)
		return intc_prio_data(desc, d, intc_grp_id(desc, enum_id), 0);

	return 0;
}

#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
static unsigned int __init intc_ack_data(struct intc_desc *desc,
					  struct intc_desc_int *d,
					  intc_enum enum_id)
{
	struct intc_mask_reg *mr = desc->ack_regs;
	unsigned int i, j, fn, mode;
	unsigned long reg_e, reg_d;

	for (i = 0; mr && enum_id && i < desc->nr_ack_regs; i++) {
		mr = desc->ack_regs + i;

		for (j = 0; j < ARRAY_SIZE(mr->enum_ids); j++) {
			if (mr->enum_ids[j] != enum_id)
				continue;

			fn = REG_FN_MODIFY_BASE;
			mode = MODE_ENABLE_REG;
			reg_e = mr->set_reg;
			reg_d = mr->set_reg;

			fn += (mr->reg_width >> 3) - 1;
			return _INTC_MK(fn, mode,
					intc_get_reg(d, reg_e),
					intc_get_reg(d, reg_d),
					1,
					(mr->reg_width - 1) - j);
		}
	}

	return 0;
}
#endif

static unsigned int __init intc_sense_data(struct intc_desc *desc,
					   struct intc_desc_int *d,
					   intc_enum enum_id)
{
	struct intc_sense_reg *sr = desc->sense_regs;
	unsigned int i, j, fn, bit;

	for (i = 0; sr && enum_id && i < desc->nr_sense_regs; i++) {
		sr = desc->sense_regs + i;

		for (j = 0; j < ARRAY_SIZE(sr->enum_ids); j++) {
			if (sr->enum_ids[j] != enum_id)
				continue;

			fn = REG_FN_MODIFY_BASE;
			fn += (sr->reg_width >> 3) - 1;

			BUG_ON((j + 1) * sr->field_width > sr->reg_width);

			bit = sr->reg_width - ((j + 1) * sr->field_width);

			return _INTC_MK(fn, 0, intc_get_reg(d, sr->reg),
					0, sr->field_width, bit);
		}
	}

	return 0;
}

static void __init intc_register_irq(struct intc_desc *desc,
				     struct intc_desc_int *d,
				     intc_enum enum_id,
				     unsigned int irq)
{
	struct intc_handle_int *hp;
	unsigned int data[2], primary;

	/* Prefer single interrupt source bitmap over other combinations:
	 * 1. bitmap, single interrupt source
	 * 2. priority, single interrupt source
	 * 3. bitmap, multiple interrupt sources (groups)
	 * 4. priority, multiple interrupt sources (groups)
	 */

	data[0] = intc_mask_data(desc, d, enum_id, 0);
	data[1] = intc_prio_data(desc, d, enum_id, 0);

	primary = 0;
	if (!data[0] && data[1])
		primary = 1;

	if (!data[0] && !data[1])
		pr_warning("intc: missing unique irq mask for "
			   "irq %d (vect 0x%04x)\n", irq, irq2evt(irq));

	data[0] = data[0] ? data[0] : intc_mask_data(desc, d, enum_id, 1);
	data[1] = data[1] ? data[1] : intc_prio_data(desc, d, enum_id, 1);

	if (!data[primary])
		primary ^= 1;

	BUG_ON(!data[primary]); /* must have primary masking method */

	disable_irq_nosync(irq);
	set_irq_chip_and_handler_name(irq, &d->chip,
				      handle_level_irq, "level");
	set_irq_chip_data(irq, (void *)data[primary]);

	/* set priority level
	 * - this needs to be at least 2 for 5-bit priorities on 7780
	 */
	intc_prio_level[irq] = 2;

	/* enable secondary masking method if present */
	if (data[!primary])
		_intc_enable(irq, data[!primary]);

	/* add irq to d->prio list if priority is available */
	if (data[1]) {
		hp = d->prio + d->nr_prio;
		hp->irq = irq;
		hp->handle = data[1];

		if (primary) {
			/*
			 * only secondary priority should access registers, so
			 * set _INTC_FN(h) = REG_FN_ERR for intc_set_priority()
			 */

			hp->handle &= ~_INTC_MK(0x0f, 0, 0, 0, 0, 0);
			hp->handle |= _INTC_MK(REG_FN_ERR, 0, 0, 0, 0, 0);
		}
		d->nr_prio++;
	}

	/* add irq to d->sense list if sense is available */
	data[0] = intc_sense_data(desc, d, enum_id);
	if (data[0]) {
		(d->sense + d->nr_sense)->irq = irq;
		(d->sense + d->nr_sense)->handle = data[0];
		d->nr_sense++;
	}

	/* irq should be disabled by default */
	d->chip.mask(irq);

#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
	if (desc->ack_regs)
		ack_handle[irq] = intc_ack_data(desc, d, enum_id);
#endif
}

static unsigned int __init save_reg(struct intc_desc_int *d,
				    unsigned int cnt,
				    unsigned long value,
				    unsigned int smp)
{
	if (value) {
		d->reg[cnt] = value;
#ifdef CONFIG_SMP
		d->smp[cnt] = smp;
#endif
		return 1;
	}

	return 0;
}

static void intc_redirect_irq(unsigned int irq, struct irq_desc *desc)
{
	generic_handle_irq((unsigned int)get_irq_data(irq));
}

void __init register_intc_controller(struct intc_desc *desc)
{
	unsigned int i, k, smp;
	struct intc_desc_int *d;

	d = kzalloc(sizeof(*d), GFP_NOWAIT);

	INIT_LIST_HEAD(&d->list);
	list_add(&d->list, &intc_list);

	d->nr_reg = desc->mask_regs ? desc->nr_mask_regs * 2 : 0;
	d->nr_reg += desc->prio_regs ? desc->nr_prio_regs * 2 : 0;
	d->nr_reg += desc->sense_regs ? desc->nr_sense_regs : 0;

#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
	d->nr_reg += desc->ack_regs ? desc->nr_ack_regs : 0;
#endif
	d->reg = kzalloc(d->nr_reg * sizeof(*d->reg), GFP_NOWAIT);
#ifdef CONFIG_SMP
	d->smp = kzalloc(d->nr_reg * sizeof(*d->smp), GFP_NOWAIT);
#endif
	k = 0;

	if (desc->mask_regs) {
		for (i = 0; i < desc->nr_mask_regs; i++) {
			smp = IS_SMP(desc->mask_regs[i]);
			k += save_reg(d, k, desc->mask_regs[i].set_reg, smp);
			k += save_reg(d, k, desc->mask_regs[i].clr_reg, smp);
		}
	}

	if (desc->prio_regs) {
		d->prio = kzalloc(desc->nr_vectors * sizeof(*d->prio), GFP_NOWAIT);

		for (i = 0; i < desc->nr_prio_regs; i++) {
			smp = IS_SMP(desc->prio_regs[i]);
			k += save_reg(d, k, desc->prio_regs[i].set_reg, smp);
			k += save_reg(d, k, desc->prio_regs[i].clr_reg, smp);
		}
	}

	if (desc->sense_regs) {
		d->sense = kzalloc(desc->nr_vectors * sizeof(*d->sense), GFP_NOWAIT);

		for (i = 0; i < desc->nr_sense_regs; i++) {
			k += save_reg(d, k, desc->sense_regs[i].reg, 0);
		}
	}

	d->chip.name = desc->name;
	d->chip.mask = intc_disable;
	d->chip.unmask = intc_enable;
	d->chip.mask_ack = intc_disable;
	d->chip.enable = intc_enable;
	d->chip.disable = intc_disable;
	d->chip.shutdown = intc_disable;
	d->chip.set_type = intc_set_sense;
	d->chip.set_wake = intc_set_wake;

#if defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4A)
	if (desc->ack_regs) {
		for (i = 0; i < desc->nr_ack_regs; i++)
			k += save_reg(d, k, desc->ack_regs[i].set_reg, 0);

		d->chip.mask_ack = intc_mask_ack;
	}
#endif

	BUG_ON(k > 256); /* _INTC_ADDR_E() and _INTC_ADDR_D() are 8 bits */

	/* register the vectors one by one */
	for (i = 0; i < desc->nr_vectors; i++) {
		struct intc_vect *vect = desc->vectors + i;
		unsigned int irq = evt2irq(vect->vect);
		struct irq_desc *irq_desc;

		if (!vect->enum_id)
			continue;

		irq_desc = irq_to_desc_alloc_node(irq, numa_node_id());
		if (unlikely(!irq_desc)) {
			pr_info("can't get irq_desc for %d\n", irq);
			continue;
		}

		intc_register_irq(desc, d, vect->enum_id, irq);

		for (k = i + 1; k < desc->nr_vectors; k++) {
			struct intc_vect *vect2 = desc->vectors + k;
			unsigned int irq2 = evt2irq(vect2->vect);

			if (vect->enum_id != vect2->enum_id)
				continue;

			/*
			 * In the case of multi-evt handling and sparse
			 * IRQ support, each vector still needs to have
			 * its own backing irq_desc.
			 */
			irq_desc = irq_to_desc_alloc_node(irq2, numa_node_id());
			if (unlikely(!irq_desc)) {
				pr_info("can't get irq_desc for %d\n", irq2);
				continue;
			}

			vect2->enum_id = 0;

			/* redirect this interrupts to the first one */
			set_irq_chip_and_handler_name(irq2, &d->chip,
					intc_redirect_irq, "redirect");
			set_irq_data(irq2, (void *)irq);
		}
	}
}

static int intc_suspend(struct sys_device *dev, pm_message_t state)
{
	struct intc_desc_int *d;
	struct irq_desc *desc;
	int irq;

	/* get intc controller associated with this sysdev */
	d = container_of(dev, struct intc_desc_int, sysdev);

	switch (state.event) {
	case PM_EVENT_ON:
		if (d->state.event != PM_EVENT_FREEZE)
			break;
		for_each_irq_desc(irq, desc) {
			if (desc->chip != &d->chip)
				continue;
			if (desc->status & IRQ_DISABLED)
				intc_disable(irq);
			else
				intc_enable(irq);
		}
		break;
	case PM_EVENT_FREEZE:
		/* nothing has to be done */
		break;
	case PM_EVENT_SUSPEND:
		/* enable wakeup irqs belonging to this intc controller */
		for_each_irq_desc(irq, desc) {
			if ((desc->status & IRQ_WAKEUP) && (desc->chip == &d->chip))
				intc_enable(irq);
		}
		break;
	}
	d->state = state;

	return 0;
}

static int intc_resume(struct sys_device *dev)
{
	return intc_suspend(dev, PMSG_ON);
}

static struct sysdev_class intc_sysdev_class = {
	.name = "intc",
	.suspend = intc_suspend,
	.resume = intc_resume,
};

/* register this intc as sysdev to allow suspend/resume */
static int __init register_intc_sysdevs(void)
{
	struct intc_desc_int *d;
	int error;
	int id = 0;

	error = sysdev_class_register(&intc_sysdev_class);
	if (!error) {
		list_for_each_entry(d, &intc_list, list) {
			d->sysdev.id = id;
			d->sysdev.cls = &intc_sysdev_class;
			error = sysdev_register(&d->sysdev);
			if (error)
				break;
			id++;
		}
	}

	if (error)
		pr_warning("intc: sysdev registration error\n");

	return error;
}

device_initcall(register_intc_sysdevs);