2 * Samsung exynos4210 Interrupt Combiner
4 * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd.
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
17 * See the GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, see <http://www.gnu.org/licenses/>.
24 * Exynos4210 Combiner represents an OR gate for SOC's IRQ lines. It combines
25 * IRQ sources into groups and provides signal output to GIC from each group. It
26 * is driven by common mask and enable/disable logic. Take a note that not all
27 * IRQs are passed to GIC through Combiner.
30 #include "hw/sysbus.h"
32 #include "hw/arm/exynos4210.h"
34 //#define DEBUG_COMBINER
37 #define DPRINTF(fmt, ...) \
38 do { fprintf(stdout, "COMBINER: [%s:%d] " fmt, __func__ , __LINE__, \
39 ## __VA_ARGS__); } while (0)
41 #define DPRINTF(fmt, ...) do {} while (0)
44 #define IIC_NGRP 64 /* Internal Interrupt Combiner
46 #define IIC_NIRQ (IIC_NGRP * 8)/* Internal Interrupt Combiner
48 #define IIC_REGION_SIZE 0x108 /* Size of memory mapped region */
49 #define IIC_REGSET_SIZE 0x41
52 * State for each output signal of internal combiner
54 typedef struct CombinerGroupState {
55 uint8_t src_mask; /* 1 - source enabled, 0 - disabled */
56 uint8_t src_pending; /* Pending source interrupts before masking */
59 #define TYPE_EXYNOS4210_COMBINER "exynos4210.combiner"
60 #define EXYNOS4210_COMBINER(obj) \
61 OBJECT_CHECK(Exynos4210CombinerState, (obj), TYPE_EXYNOS4210_COMBINER)
63 typedef struct Exynos4210CombinerState {
64 SysBusDevice parent_obj;
68 struct CombinerGroupState group[IIC_NGRP];
69 uint32_t reg_set[IIC_REGSET_SIZE];
71 uint32_t external; /* 1 means that this combiner is external */
73 qemu_irq output_irq[IIC_NGRP];
74 } Exynos4210CombinerState;
76 static const VMStateDescription vmstate_exynos4210_combiner_group_state = {
77 .name = "exynos4210.combiner.groupstate",
79 .minimum_version_id = 1,
80 .fields = (VMStateField[]) {
81 VMSTATE_UINT8(src_mask, CombinerGroupState),
82 VMSTATE_UINT8(src_pending, CombinerGroupState),
87 static const VMStateDescription vmstate_exynos4210_combiner = {
88 .name = "exynos4210.combiner",
90 .minimum_version_id = 1,
91 .fields = (VMStateField[]) {
92 VMSTATE_STRUCT_ARRAY(group, Exynos4210CombinerState, IIC_NGRP, 0,
93 vmstate_exynos4210_combiner_group_state, CombinerGroupState),
94 VMSTATE_UINT32_ARRAY(reg_set, Exynos4210CombinerState,
96 VMSTATE_UINT32_ARRAY(icipsr, Exynos4210CombinerState, 2),
97 VMSTATE_UINT32(external, Exynos4210CombinerState),
103 * Get Combiner input GPIO into irqs structure
105 void exynos4210_combiner_get_gpioin(Exynos4210Irq *irqs, DeviceState *dev,
113 max = ext ? EXYNOS4210_MAX_EXT_COMBINER_IN_IRQ :
114 EXYNOS4210_MAX_INT_COMBINER_IN_IRQ;
115 irq = ext ? irqs->ext_combiner_irq : irqs->int_combiner_irq;
118 * Some IRQs of Int/External Combiner are going to two Combiners groups,
121 for (n = 0; n < max; n++) {
123 bit = EXYNOS4210_COMBINER_GET_BIT_NUM(n);
126 /* MDNIE_LCD1 INTG1 */
127 case EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 0) ...
128 EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 3):
129 irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
130 irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(0, bit + 4)]);
134 case EXYNOS4210_COMBINER_GET_IRQ_NUM(3, 4):
135 irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
136 irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(2, bit)]);
140 case EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 0) ...
141 EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 3):
142 irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
143 irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(11, bit + 4)]);
146 /* Multi-Core Timer INTG12 */
147 case EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 4) ...
148 EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 8):
149 irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
150 irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(1, bit + 4)]);
153 /* Multi-Core Timer INTG35 */
154 case EXYNOS4210_COMBINER_GET_IRQ_NUM(35, 4) ...
155 EXYNOS4210_COMBINER_GET_IRQ_NUM(35, 8):
156 irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
157 irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(1, bit + 4)]);
160 /* Multi-Core Timer INTG51 */
161 case EXYNOS4210_COMBINER_GET_IRQ_NUM(51, 4) ...
162 EXYNOS4210_COMBINER_GET_IRQ_NUM(51, 8):
163 irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
164 irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(1, bit + 4)]);
167 /* Multi-Core Timer INTG53 */
168 case EXYNOS4210_COMBINER_GET_IRQ_NUM(53, 4) ...
169 EXYNOS4210_COMBINER_GET_IRQ_NUM(53, 8):
170 irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
171 irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(1, bit + 4)]);
175 irq[n] = qdev_get_gpio_in(dev, n);
180 exynos4210_combiner_read(void *opaque, hwaddr offset, unsigned size)
182 struct Exynos4210CombinerState *s =
183 (struct Exynos4210CombinerState *)opaque;
184 uint32_t req_quad_base_n; /* Base of registers quad. Multiply it by 4 and
185 get a start of corresponding group quad */
186 uint32_t grp_quad_base_n; /* Base of group quad */
187 uint32_t reg_n; /* Register number inside the quad */
190 req_quad_base_n = offset >> 4;
191 grp_quad_base_n = req_quad_base_n << 2;
192 reg_n = (offset - (req_quad_base_n << 4)) >> 2;
194 if (req_quad_base_n >= IIC_NGRP) {
195 /* Read of ICIPSR register */
196 return s->icipsr[reg_n];
204 val |= s->group[grp_quad_base_n].src_pending;
205 val |= s->group[grp_quad_base_n + 1].src_pending << 8;
206 val |= s->group[grp_quad_base_n + 2].src_pending << 16;
207 val |= s->group[grp_quad_base_n + 3].src_pending << 24;
211 val |= s->group[grp_quad_base_n].src_mask &
212 s->group[grp_quad_base_n].src_pending;
213 val |= (s->group[grp_quad_base_n + 1].src_mask &
214 s->group[grp_quad_base_n + 1].src_pending) << 8;
215 val |= (s->group[grp_quad_base_n + 2].src_mask &
216 s->group[grp_quad_base_n + 2].src_pending) << 16;
217 val |= (s->group[grp_quad_base_n + 3].src_mask &
218 s->group[grp_quad_base_n + 3].src_pending) << 24;
221 if (offset >> 2 >= IIC_REGSET_SIZE) {
222 hw_error("exynos4210.combiner: overflow of reg_set by 0x"
223 TARGET_FMT_plx "offset\n", offset);
225 val = s->reg_set[offset >> 2];
231 static void exynos4210_combiner_update(void *opaque, uint8_t group_n)
233 struct Exynos4210CombinerState *s =
234 (struct Exynos4210CombinerState *)opaque;
236 /* Send interrupt if needed */
237 if (s->group[group_n].src_mask & s->group[group_n].src_pending) {
238 #ifdef DEBUG_COMBINER
241 DPRINTF("%s raise IRQ[%d]\n", s->external ? "EXT" : "INT", group_n);
245 /* Set Combiner interrupt pending status after masking */
247 s->icipsr[1] |= 1 << (group_n - 32);
249 s->icipsr[0] |= 1 << group_n;
252 qemu_irq_raise(s->output_irq[group_n]);
254 #ifdef DEBUG_COMBINER
257 DPRINTF("%s lower IRQ[%d]\n", s->external ? "EXT" : "INT", group_n);
261 /* Set Combiner interrupt pending status after masking */
263 s->icipsr[1] &= ~(1 << (group_n - 32));
265 s->icipsr[0] &= ~(1 << group_n);
268 qemu_irq_lower(s->output_irq[group_n]);
272 static void exynos4210_combiner_write(void *opaque, hwaddr offset,
273 uint64_t val, unsigned size)
275 struct Exynos4210CombinerState *s =
276 (struct Exynos4210CombinerState *)opaque;
277 uint32_t req_quad_base_n; /* Base of registers quad. Multiply it by 4 and
278 get a start of corresponding group quad */
279 uint32_t grp_quad_base_n; /* Base of group quad */
280 uint32_t reg_n; /* Register number inside the quad */
282 req_quad_base_n = offset >> 4;
283 grp_quad_base_n = req_quad_base_n << 2;
284 reg_n = (offset - (req_quad_base_n << 4)) >> 2;
286 if (req_quad_base_n >= IIC_NGRP) {
287 hw_error("exynos4210.combiner: unallowed write access at offset 0x"
288 TARGET_FMT_plx "\n", offset);
293 hw_error("exynos4210.combiner: unallowed write access at offset 0x"
294 TARGET_FMT_plx "\n", offset);
298 if (offset >> 2 >= IIC_REGSET_SIZE) {
299 hw_error("exynos4210.combiner: overflow of reg_set by 0x"
300 TARGET_FMT_plx "offset\n", offset);
302 s->reg_set[offset >> 2] = val;
307 /* FIXME: what if irq is pending, allowed by mask, and we allow it
308 * again. Interrupt will rise again! */
310 DPRINTF("%s enable IRQ for groups %d, %d, %d, %d\n",
311 s->external ? "EXT" : "INT",
315 grp_quad_base_n + 3);
317 /* Enable interrupt sources */
318 s->group[grp_quad_base_n].src_mask |= val & 0xFF;
319 s->group[grp_quad_base_n + 1].src_mask |= (val & 0xFF00) >> 8;
320 s->group[grp_quad_base_n + 2].src_mask |= (val & 0xFF0000) >> 16;
321 s->group[grp_quad_base_n + 3].src_mask |= (val & 0xFF000000) >> 24;
323 exynos4210_combiner_update(s, grp_quad_base_n);
324 exynos4210_combiner_update(s, grp_quad_base_n + 1);
325 exynos4210_combiner_update(s, grp_quad_base_n + 2);
326 exynos4210_combiner_update(s, grp_quad_base_n + 3);
330 DPRINTF("%s disable IRQ for groups %d, %d, %d, %d\n",
331 s->external ? "EXT" : "INT",
335 grp_quad_base_n + 3);
337 /* Disable interrupt sources */
338 s->group[grp_quad_base_n].src_mask &= ~(val & 0xFF);
339 s->group[grp_quad_base_n + 1].src_mask &= ~((val & 0xFF00) >> 8);
340 s->group[grp_quad_base_n + 2].src_mask &= ~((val & 0xFF0000) >> 16);
341 s->group[grp_quad_base_n + 3].src_mask &= ~((val & 0xFF000000) >> 24);
343 exynos4210_combiner_update(s, grp_quad_base_n);
344 exynos4210_combiner_update(s, grp_quad_base_n + 1);
345 exynos4210_combiner_update(s, grp_quad_base_n + 2);
346 exynos4210_combiner_update(s, grp_quad_base_n + 3);
349 hw_error("exynos4210.combiner: unallowed write access at offset 0x"
350 TARGET_FMT_plx "\n", offset);
355 /* Get combiner group and bit from irq number */
356 static uint8_t get_combiner_group_and_bit(int irq, uint8_t *bit)
358 *bit = irq - ((irq >> 3) << 3);
362 /* Process a change in an external IRQ input. */
363 static void exynos4210_combiner_handler(void *opaque, int irq, int level)
365 struct Exynos4210CombinerState *s =
366 (struct Exynos4210CombinerState *)opaque;
367 uint8_t bit_n, group_n;
369 group_n = get_combiner_group_and_bit(irq, &bit_n);
371 if (s->external && group_n >= EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ) {
372 DPRINTF("%s unallowed IRQ group 0x%x\n", s->external ? "EXT" : "INT"
378 s->group[group_n].src_pending |= 1 << bit_n;
380 s->group[group_n].src_pending &= ~(1 << bit_n);
383 exynos4210_combiner_update(s, group_n);
386 static void exynos4210_combiner_reset(DeviceState *d)
388 struct Exynos4210CombinerState *s = (struct Exynos4210CombinerState *)d;
390 memset(&s->group, 0, sizeof(s->group));
391 memset(&s->reg_set, 0, sizeof(s->reg_set));
393 s->reg_set[0xC0 >> 2] = 0x01010101;
394 s->reg_set[0xC4 >> 2] = 0x01010101;
395 s->reg_set[0xD0 >> 2] = 0x01010101;
396 s->reg_set[0xD4 >> 2] = 0x01010101;
399 static const MemoryRegionOps exynos4210_combiner_ops = {
400 .read = exynos4210_combiner_read,
401 .write = exynos4210_combiner_write,
402 .endianness = DEVICE_NATIVE_ENDIAN,
406 * Internal Combiner initialization.
408 static int exynos4210_combiner_init(SysBusDevice *sbd)
410 DeviceState *dev = DEVICE(sbd);
411 Exynos4210CombinerState *s = EXYNOS4210_COMBINER(dev);
414 /* Allocate general purpose input signals and connect a handler to each of
416 qdev_init_gpio_in(dev, exynos4210_combiner_handler, IIC_NIRQ);
418 /* Connect SysBusDev irqs to device specific irqs */
419 for (i = 0; i < IIC_NGRP; i++) {
420 sysbus_init_irq(sbd, &s->output_irq[i]);
423 memory_region_init_io(&s->iomem, OBJECT(s), &exynos4210_combiner_ops, s,
424 "exynos4210-combiner", IIC_REGION_SIZE);
425 sysbus_init_mmio(sbd, &s->iomem);
430 static Property exynos4210_combiner_properties[] = {
431 DEFINE_PROP_UINT32("external", Exynos4210CombinerState, external, 0),
432 DEFINE_PROP_END_OF_LIST(),
435 static void exynos4210_combiner_class_init(ObjectClass *klass, void *data)
437 DeviceClass *dc = DEVICE_CLASS(klass);
438 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
440 k->init = exynos4210_combiner_init;
441 dc->reset = exynos4210_combiner_reset;
442 dc->props = exynos4210_combiner_properties;
443 dc->vmsd = &vmstate_exynos4210_combiner;
446 static const TypeInfo exynos4210_combiner_info = {
447 .name = TYPE_EXYNOS4210_COMBINER,
448 .parent = TYPE_SYS_BUS_DEVICE,
449 .instance_size = sizeof(Exynos4210CombinerState),
450 .class_init = exynos4210_combiner_class_init,
453 static void exynos4210_combiner_register_types(void)
455 type_register_static(&exynos4210_combiner_info);
458 type_init(exynos4210_combiner_register_types)