pm_smbus: rename variable to avoid shadowing
[qemu/kevin.git] / hw / intc / omap_intc.c
blob435c47600fc5ea30782bc83de4a749aebe3282ad
1 /*
2 * TI OMAP interrupt controller emulation.
4 * Copyright (C) 2006-2008 Andrzej Zaborowski <balrog@zabor.org>
5 * Copyright (C) 2007-2008 Nokia Corporation
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 or
10 * (at your option) version 3 of the License.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, see <http://www.gnu.org/licenses/>.
21 #include "qemu/osdep.h"
22 #include "hw/irq.h"
23 #include "hw/qdev-properties.h"
24 #include "hw/arm/omap.h"
25 #include "hw/sysbus.h"
26 #include "qemu/error-report.h"
27 #include "qemu/module.h"
28 #include "qapi/error.h"
30 /* Interrupt Handlers */
31 struct omap_intr_handler_bank_s {
32 uint32_t irqs;
33 uint32_t inputs;
34 uint32_t mask;
35 uint32_t fiq;
36 uint32_t sens_edge;
37 uint32_t swi;
38 unsigned char priority[32];
41 struct OMAPIntcState {
42 SysBusDevice parent_obj;
44 qemu_irq *pins;
45 qemu_irq parent_intr[2];
46 MemoryRegion mmio;
47 void *iclk;
48 void *fclk;
49 unsigned char nbanks;
50 int level_only;
51 uint32_t size;
53 uint8_t revision;
55 /* state */
56 uint32_t new_agr[2];
57 int sir_intr[2];
58 int autoidle;
59 uint32_t mask;
60 struct omap_intr_handler_bank_s bank[3];
63 static void omap_inth_sir_update(OMAPIntcState *s, int is_fiq)
65 int i, j, sir_intr, p_intr, p;
66 uint32_t level;
67 sir_intr = 0;
68 p_intr = 255;
70 /* Find the interrupt line with the highest dynamic priority.
71 * Note: 0 denotes the highest priority.
72 * If all interrupts have the same priority, the default order is IRQ_N,
73 * IRQ_N-1,...,IRQ_0. */
74 for (j = 0; j < s->nbanks; ++j) {
75 level = s->bank[j].irqs & ~s->bank[j].mask &
76 (is_fiq ? s->bank[j].fiq : ~s->bank[j].fiq);
78 while (level != 0) {
79 i = ctz32(level);
80 p = s->bank[j].priority[i];
81 if (p <= p_intr) {
82 p_intr = p;
83 sir_intr = 32 * j + i;
85 level &= level - 1;
88 s->sir_intr[is_fiq] = sir_intr;
91 static inline void omap_inth_update(OMAPIntcState *s, int is_fiq)
93 int i;
94 uint32_t has_intr = 0;
96 for (i = 0; i < s->nbanks; ++i)
97 has_intr |= s->bank[i].irqs & ~s->bank[i].mask &
98 (is_fiq ? s->bank[i].fiq : ~s->bank[i].fiq);
100 if (s->new_agr[is_fiq] & has_intr & s->mask) {
101 s->new_agr[is_fiq] = 0;
102 omap_inth_sir_update(s, is_fiq);
103 qemu_set_irq(s->parent_intr[is_fiq], 1);
107 #define INT_FALLING_EDGE 0
108 #define INT_LOW_LEVEL 1
110 static void omap_set_intr(void *opaque, int irq, int req)
112 OMAPIntcState *ih = opaque;
113 uint32_t rise;
115 struct omap_intr_handler_bank_s *bank = &ih->bank[irq >> 5];
116 int n = irq & 31;
118 if (req) {
119 rise = ~bank->irqs & (1 << n);
120 if (~bank->sens_edge & (1 << n))
121 rise &= ~bank->inputs;
123 bank->inputs |= (1 << n);
124 if (rise) {
125 bank->irqs |= rise;
126 omap_inth_update(ih, 0);
127 omap_inth_update(ih, 1);
129 } else {
130 rise = bank->sens_edge & bank->irqs & (1 << n);
131 bank->irqs &= ~rise;
132 bank->inputs &= ~(1 << n);
136 /* Simplified version with no edge detection */
137 static void omap_set_intr_noedge(void *opaque, int irq, int req)
139 OMAPIntcState *ih = opaque;
140 uint32_t rise;
142 struct omap_intr_handler_bank_s *bank = &ih->bank[irq >> 5];
143 int n = irq & 31;
145 if (req) {
146 rise = ~bank->inputs & (1 << n);
147 if (rise) {
148 bank->irqs |= bank->inputs |= rise;
149 omap_inth_update(ih, 0);
150 omap_inth_update(ih, 1);
152 } else
153 bank->irqs = (bank->inputs &= ~(1 << n)) | bank->swi;
156 static uint64_t omap_inth_read(void *opaque, hwaddr addr,
157 unsigned size)
159 OMAPIntcState *s = opaque;
160 int i, offset = addr;
161 int bank_no = offset >> 8;
162 int line_no;
163 struct omap_intr_handler_bank_s *bank = &s->bank[bank_no];
164 offset &= 0xff;
166 switch (offset) {
167 case 0x00: /* ITR */
168 return bank->irqs;
170 case 0x04: /* MIR */
171 return bank->mask;
173 case 0x10: /* SIR_IRQ_CODE */
174 case 0x14: /* SIR_FIQ_CODE */
175 if (bank_no != 0)
176 break;
177 line_no = s->sir_intr[(offset - 0x10) >> 2];
178 bank = &s->bank[line_no >> 5];
179 i = line_no & 31;
180 if (((bank->sens_edge >> i) & 1) == INT_FALLING_EDGE)
181 bank->irqs &= ~(1 << i);
182 return line_no;
184 case 0x18: /* CONTROL_REG */
185 if (bank_no != 0)
186 break;
187 return 0;
189 case 0x1c: /* ILR0 */
190 case 0x20: /* ILR1 */
191 case 0x24: /* ILR2 */
192 case 0x28: /* ILR3 */
193 case 0x2c: /* ILR4 */
194 case 0x30: /* ILR5 */
195 case 0x34: /* ILR6 */
196 case 0x38: /* ILR7 */
197 case 0x3c: /* ILR8 */
198 case 0x40: /* ILR9 */
199 case 0x44: /* ILR10 */
200 case 0x48: /* ILR11 */
201 case 0x4c: /* ILR12 */
202 case 0x50: /* ILR13 */
203 case 0x54: /* ILR14 */
204 case 0x58: /* ILR15 */
205 case 0x5c: /* ILR16 */
206 case 0x60: /* ILR17 */
207 case 0x64: /* ILR18 */
208 case 0x68: /* ILR19 */
209 case 0x6c: /* ILR20 */
210 case 0x70: /* ILR21 */
211 case 0x74: /* ILR22 */
212 case 0x78: /* ILR23 */
213 case 0x7c: /* ILR24 */
214 case 0x80: /* ILR25 */
215 case 0x84: /* ILR26 */
216 case 0x88: /* ILR27 */
217 case 0x8c: /* ILR28 */
218 case 0x90: /* ILR29 */
219 case 0x94: /* ILR30 */
220 case 0x98: /* ILR31 */
221 i = (offset - 0x1c) >> 2;
222 return (bank->priority[i] << 2) |
223 (((bank->sens_edge >> i) & 1) << 1) |
224 ((bank->fiq >> i) & 1);
226 case 0x9c: /* ISR */
227 return 0x00000000;
230 OMAP_BAD_REG(addr);
231 return 0;
234 static void omap_inth_write(void *opaque, hwaddr addr,
235 uint64_t value, unsigned size)
237 OMAPIntcState *s = opaque;
238 int i, offset = addr;
239 int bank_no = offset >> 8;
240 struct omap_intr_handler_bank_s *bank = &s->bank[bank_no];
241 offset &= 0xff;
243 switch (offset) {
244 case 0x00: /* ITR */
245 /* Important: ignore the clearing if the IRQ is level-triggered and
246 the input bit is 1 */
247 bank->irqs &= value | (bank->inputs & bank->sens_edge);
248 return;
250 case 0x04: /* MIR */
251 bank->mask = value;
252 omap_inth_update(s, 0);
253 omap_inth_update(s, 1);
254 return;
256 case 0x10: /* SIR_IRQ_CODE */
257 case 0x14: /* SIR_FIQ_CODE */
258 OMAP_RO_REG(addr);
259 break;
261 case 0x18: /* CONTROL_REG */
262 if (bank_no != 0)
263 break;
264 if (value & 2) {
265 qemu_set_irq(s->parent_intr[1], 0);
266 s->new_agr[1] = ~0;
267 omap_inth_update(s, 1);
269 if (value & 1) {
270 qemu_set_irq(s->parent_intr[0], 0);
271 s->new_agr[0] = ~0;
272 omap_inth_update(s, 0);
274 return;
276 case 0x1c: /* ILR0 */
277 case 0x20: /* ILR1 */
278 case 0x24: /* ILR2 */
279 case 0x28: /* ILR3 */
280 case 0x2c: /* ILR4 */
281 case 0x30: /* ILR5 */
282 case 0x34: /* ILR6 */
283 case 0x38: /* ILR7 */
284 case 0x3c: /* ILR8 */
285 case 0x40: /* ILR9 */
286 case 0x44: /* ILR10 */
287 case 0x48: /* ILR11 */
288 case 0x4c: /* ILR12 */
289 case 0x50: /* ILR13 */
290 case 0x54: /* ILR14 */
291 case 0x58: /* ILR15 */
292 case 0x5c: /* ILR16 */
293 case 0x60: /* ILR17 */
294 case 0x64: /* ILR18 */
295 case 0x68: /* ILR19 */
296 case 0x6c: /* ILR20 */
297 case 0x70: /* ILR21 */
298 case 0x74: /* ILR22 */
299 case 0x78: /* ILR23 */
300 case 0x7c: /* ILR24 */
301 case 0x80: /* ILR25 */
302 case 0x84: /* ILR26 */
303 case 0x88: /* ILR27 */
304 case 0x8c: /* ILR28 */
305 case 0x90: /* ILR29 */
306 case 0x94: /* ILR30 */
307 case 0x98: /* ILR31 */
308 i = (offset - 0x1c) >> 2;
309 bank->priority[i] = (value >> 2) & 0x1f;
310 bank->sens_edge &= ~(1 << i);
311 bank->sens_edge |= ((value >> 1) & 1) << i;
312 bank->fiq &= ~(1 << i);
313 bank->fiq |= (value & 1) << i;
314 return;
316 case 0x9c: /* ISR */
317 for (i = 0; i < 32; i ++)
318 if (value & (1 << i)) {
319 omap_set_intr(s, 32 * bank_no + i, 1);
320 return;
322 return;
324 OMAP_BAD_REG(addr);
327 static const MemoryRegionOps omap_inth_mem_ops = {
328 .read = omap_inth_read,
329 .write = omap_inth_write,
330 .endianness = DEVICE_NATIVE_ENDIAN,
331 .valid = {
332 .min_access_size = 4,
333 .max_access_size = 4,
337 static void omap_inth_reset(DeviceState *dev)
339 OMAPIntcState *s = OMAP_INTC(dev);
340 int i;
342 for (i = 0; i < s->nbanks; ++i){
343 s->bank[i].irqs = 0x00000000;
344 s->bank[i].mask = 0xffffffff;
345 s->bank[i].sens_edge = 0x00000000;
346 s->bank[i].fiq = 0x00000000;
347 s->bank[i].inputs = 0x00000000;
348 s->bank[i].swi = 0x00000000;
349 memset(s->bank[i].priority, 0, sizeof(s->bank[i].priority));
351 if (s->level_only)
352 s->bank[i].sens_edge = 0xffffffff;
355 s->new_agr[0] = ~0;
356 s->new_agr[1] = ~0;
357 s->sir_intr[0] = 0;
358 s->sir_intr[1] = 0;
359 s->autoidle = 0;
360 s->mask = ~0;
362 qemu_set_irq(s->parent_intr[0], 0);
363 qemu_set_irq(s->parent_intr[1], 0);
366 static void omap_intc_init(Object *obj)
368 DeviceState *dev = DEVICE(obj);
369 OMAPIntcState *s = OMAP_INTC(obj);
370 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
372 s->nbanks = 1;
373 sysbus_init_irq(sbd, &s->parent_intr[0]);
374 sysbus_init_irq(sbd, &s->parent_intr[1]);
375 qdev_init_gpio_in(dev, omap_set_intr, s->nbanks * 32);
376 memory_region_init_io(&s->mmio, obj, &omap_inth_mem_ops, s,
377 "omap-intc", s->size);
378 sysbus_init_mmio(sbd, &s->mmio);
381 static void omap_intc_realize(DeviceState *dev, Error **errp)
383 OMAPIntcState *s = OMAP_INTC(dev);
385 if (!s->iclk) {
386 error_setg(errp, "omap-intc: clk not connected");
390 void omap_intc_set_iclk(OMAPIntcState *intc, omap_clk clk)
392 intc->iclk = clk;
395 void omap_intc_set_fclk(OMAPIntcState *intc, omap_clk clk)
397 intc->fclk = clk;
400 static Property omap_intc_properties[] = {
401 DEFINE_PROP_UINT32("size", OMAPIntcState, size, 0x100),
402 DEFINE_PROP_END_OF_LIST(),
405 static void omap_intc_class_init(ObjectClass *klass, void *data)
407 DeviceClass *dc = DEVICE_CLASS(klass);
409 dc->reset = omap_inth_reset;
410 device_class_set_props(dc, omap_intc_properties);
411 /* Reason: pointer property "clk" */
412 dc->user_creatable = false;
413 dc->realize = omap_intc_realize;
416 static const TypeInfo omap_intc_info = {
417 .name = "omap-intc",
418 .parent = TYPE_OMAP_INTC,
419 .instance_init = omap_intc_init,
420 .class_init = omap_intc_class_init,
423 static uint64_t omap2_inth_read(void *opaque, hwaddr addr,
424 unsigned size)
426 OMAPIntcState *s = opaque;
427 int offset = addr;
428 int bank_no, line_no;
429 struct omap_intr_handler_bank_s *bank = NULL;
431 if ((offset & 0xf80) == 0x80) {
432 bank_no = (offset & 0x60) >> 5;
433 if (bank_no < s->nbanks) {
434 offset &= ~0x60;
435 bank = &s->bank[bank_no];
436 } else {
437 OMAP_BAD_REG(addr);
438 return 0;
442 switch (offset) {
443 case 0x00: /* INTC_REVISION */
444 return s->revision;
446 case 0x10: /* INTC_SYSCONFIG */
447 return (s->autoidle >> 2) & 1;
449 case 0x14: /* INTC_SYSSTATUS */
450 return 1; /* RESETDONE */
452 case 0x40: /* INTC_SIR_IRQ */
453 return s->sir_intr[0];
455 case 0x44: /* INTC_SIR_FIQ */
456 return s->sir_intr[1];
458 case 0x48: /* INTC_CONTROL */
459 return (!s->mask) << 2; /* GLOBALMASK */
461 case 0x4c: /* INTC_PROTECTION */
462 return 0;
464 case 0x50: /* INTC_IDLE */
465 return s->autoidle & 3;
467 /* Per-bank registers */
468 case 0x80: /* INTC_ITR */
469 return bank->inputs;
471 case 0x84: /* INTC_MIR */
472 return bank->mask;
474 case 0x88: /* INTC_MIR_CLEAR */
475 case 0x8c: /* INTC_MIR_SET */
476 return 0;
478 case 0x90: /* INTC_ISR_SET */
479 return bank->swi;
481 case 0x94: /* INTC_ISR_CLEAR */
482 return 0;
484 case 0x98: /* INTC_PENDING_IRQ */
485 return bank->irqs & ~bank->mask & ~bank->fiq;
487 case 0x9c: /* INTC_PENDING_FIQ */
488 return bank->irqs & ~bank->mask & bank->fiq;
490 /* Per-line registers */
491 case 0x100 ... 0x300: /* INTC_ILR */
492 bank_no = (offset - 0x100) >> 7;
493 if (bank_no > s->nbanks)
494 break;
495 bank = &s->bank[bank_no];
496 line_no = (offset & 0x7f) >> 2;
497 return (bank->priority[line_no] << 2) |
498 ((bank->fiq >> line_no) & 1);
500 OMAP_BAD_REG(addr);
501 return 0;
504 static void omap2_inth_write(void *opaque, hwaddr addr,
505 uint64_t value, unsigned size)
507 OMAPIntcState *s = opaque;
508 int offset = addr;
509 int bank_no, line_no;
510 struct omap_intr_handler_bank_s *bank = NULL;
512 if ((offset & 0xf80) == 0x80) {
513 bank_no = (offset & 0x60) >> 5;
514 if (bank_no < s->nbanks) {
515 offset &= ~0x60;
516 bank = &s->bank[bank_no];
517 } else {
518 OMAP_BAD_REG(addr);
519 return;
523 switch (offset) {
524 case 0x10: /* INTC_SYSCONFIG */
525 s->autoidle &= 4;
526 s->autoidle |= (value & 1) << 2;
527 if (value & 2) { /* SOFTRESET */
528 omap_inth_reset(DEVICE(s));
530 return;
532 case 0x48: /* INTC_CONTROL */
533 s->mask = (value & 4) ? 0 : ~0; /* GLOBALMASK */
534 if (value & 2) { /* NEWFIQAGR */
535 qemu_set_irq(s->parent_intr[1], 0);
536 s->new_agr[1] = ~0;
537 omap_inth_update(s, 1);
539 if (value & 1) { /* NEWIRQAGR */
540 qemu_set_irq(s->parent_intr[0], 0);
541 s->new_agr[0] = ~0;
542 omap_inth_update(s, 0);
544 return;
546 case 0x4c: /* INTC_PROTECTION */
547 /* TODO: Make a bitmap (or sizeof(char)map) of access privileges
548 * for every register, see Chapter 3 and 4 for privileged mode. */
549 if (value & 1)
550 fprintf(stderr, "%s: protection mode enable attempt\n",
551 __func__);
552 return;
554 case 0x50: /* INTC_IDLE */
555 s->autoidle &= ~3;
556 s->autoidle |= value & 3;
557 return;
559 /* Per-bank registers */
560 case 0x84: /* INTC_MIR */
561 bank->mask = value;
562 omap_inth_update(s, 0);
563 omap_inth_update(s, 1);
564 return;
566 case 0x88: /* INTC_MIR_CLEAR */
567 bank->mask &= ~value;
568 omap_inth_update(s, 0);
569 omap_inth_update(s, 1);
570 return;
572 case 0x8c: /* INTC_MIR_SET */
573 bank->mask |= value;
574 return;
576 case 0x90: /* INTC_ISR_SET */
577 bank->irqs |= bank->swi |= value;
578 omap_inth_update(s, 0);
579 omap_inth_update(s, 1);
580 return;
582 case 0x94: /* INTC_ISR_CLEAR */
583 bank->swi &= ~value;
584 bank->irqs = bank->swi & bank->inputs;
585 return;
587 /* Per-line registers */
588 case 0x100 ... 0x300: /* INTC_ILR */
589 bank_no = (offset - 0x100) >> 7;
590 if (bank_no > s->nbanks)
591 break;
592 bank = &s->bank[bank_no];
593 line_no = (offset & 0x7f) >> 2;
594 bank->priority[line_no] = (value >> 2) & 0x3f;
595 bank->fiq &= ~(1 << line_no);
596 bank->fiq |= (value & 1) << line_no;
597 return;
599 case 0x00: /* INTC_REVISION */
600 case 0x14: /* INTC_SYSSTATUS */
601 case 0x40: /* INTC_SIR_IRQ */
602 case 0x44: /* INTC_SIR_FIQ */
603 case 0x80: /* INTC_ITR */
604 case 0x98: /* INTC_PENDING_IRQ */
605 case 0x9c: /* INTC_PENDING_FIQ */
606 OMAP_RO_REG(addr);
607 return;
609 OMAP_BAD_REG(addr);
612 static const MemoryRegionOps omap2_inth_mem_ops = {
613 .read = omap2_inth_read,
614 .write = omap2_inth_write,
615 .endianness = DEVICE_NATIVE_ENDIAN,
616 .valid = {
617 .min_access_size = 4,
618 .max_access_size = 4,
622 static void omap2_intc_init(Object *obj)
624 DeviceState *dev = DEVICE(obj);
625 OMAPIntcState *s = OMAP_INTC(obj);
626 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
628 s->level_only = 1;
629 s->nbanks = 3;
630 sysbus_init_irq(sbd, &s->parent_intr[0]);
631 sysbus_init_irq(sbd, &s->parent_intr[1]);
632 qdev_init_gpio_in(dev, omap_set_intr_noedge, s->nbanks * 32);
633 memory_region_init_io(&s->mmio, obj, &omap2_inth_mem_ops, s,
634 "omap2-intc", 0x1000);
635 sysbus_init_mmio(sbd, &s->mmio);
638 static void omap2_intc_realize(DeviceState *dev, Error **errp)
640 OMAPIntcState *s = OMAP_INTC(dev);
642 if (!s->iclk) {
643 error_setg(errp, "omap2-intc: iclk not connected");
644 return;
646 if (!s->fclk) {
647 error_setg(errp, "omap2-intc: fclk not connected");
648 return;
652 static Property omap2_intc_properties[] = {
653 DEFINE_PROP_UINT8("revision", OMAPIntcState,
654 revision, 0x21),
655 DEFINE_PROP_END_OF_LIST(),
658 static void omap2_intc_class_init(ObjectClass *klass, void *data)
660 DeviceClass *dc = DEVICE_CLASS(klass);
662 dc->reset = omap_inth_reset;
663 device_class_set_props(dc, omap2_intc_properties);
664 /* Reason: pointer property "iclk", "fclk" */
665 dc->user_creatable = false;
666 dc->realize = omap2_intc_realize;
669 static const TypeInfo omap2_intc_info = {
670 .name = "omap2-intc",
671 .parent = TYPE_OMAP_INTC,
672 .instance_init = omap2_intc_init,
673 .class_init = omap2_intc_class_init,
676 static const TypeInfo omap_intc_type_info = {
677 .name = TYPE_OMAP_INTC,
678 .parent = TYPE_SYS_BUS_DEVICE,
679 .instance_size = sizeof(OMAPIntcState),
680 .abstract = true,
683 static void omap_intc_register_types(void)
685 type_register_static(&omap_intc_type_info);
686 type_register_static(&omap_intc_info);
687 type_register_static(&omap2_intc_info);
690 type_init(omap_intc_register_types)