| /* |
| * Samsung exynos4210 Interrupt Combiner |
| * |
| * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd. |
| * All rights reserved. |
| * |
| * Evgeny Voevodin <e.voevodin@samsung.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| * See the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| /* |
| * Exynos4210 Combiner represents an OR gate for SOC's IRQ lines. It combines |
| * IRQ sources into groups and provides signal output to GIC from each group. It |
| * is driven by common mask and enable/disable logic. Take a note that not all |
| * IRQs are passed to GIC through Combiner. |
| */ |
| |
| #include "hw/sysbus.h" |
| |
| #include "hw/exynos4210.h" |
| |
| //#define DEBUG_COMBINER |
| |
| #ifdef DEBUG_COMBINER |
| #define DPRINTF(fmt, ...) \ |
| do { fprintf(stdout, "COMBINER: [%s:%d] " fmt, __func__ , __LINE__, \ |
| ## __VA_ARGS__); } while (0) |
| #else |
| #define DPRINTF(fmt, ...) do {} while (0) |
| #endif |
| |
| #define IIC_NGRP 64 /* Internal Interrupt Combiner |
| Groups number */ |
| #define IIC_NIRQ (IIC_NGRP * 8)/* Internal Interrupt Combiner |
| Interrupts number */ |
| #define IIC_REGION_SIZE 0x108 /* Size of memory mapped region */ |
| #define IIC_REGSET_SIZE 0x41 |
| |
| /* |
| * State for each output signal of internal combiner |
| */ |
| typedef struct CombinerGroupState { |
| uint8_t src_mask; /* 1 - source enabled, 0 - disabled */ |
| uint8_t src_pending; /* Pending source interrupts before masking */ |
| } CombinerGroupState; |
| |
| typedef struct Exynos4210CombinerState { |
| SysBusDevice busdev; |
| MemoryRegion iomem; |
| |
| struct CombinerGroupState group[IIC_NGRP]; |
| uint32_t reg_set[IIC_REGSET_SIZE]; |
| uint32_t icipsr[2]; |
| uint32_t external; /* 1 means that this combiner is external */ |
| |
| qemu_irq output_irq[IIC_NGRP]; |
| } Exynos4210CombinerState; |
| |
| static const VMStateDescription vmstate_exynos4210_combiner_group_state = { |
| .name = "exynos4210.combiner.groupstate", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .minimum_version_id_old = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT8(src_mask, CombinerGroupState), |
| VMSTATE_UINT8(src_pending, CombinerGroupState), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static const VMStateDescription vmstate_exynos4210_combiner = { |
| .name = "exynos4210.combiner", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .minimum_version_id_old = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_STRUCT_ARRAY(group, Exynos4210CombinerState, IIC_NGRP, 0, |
| vmstate_exynos4210_combiner_group_state, CombinerGroupState), |
| VMSTATE_UINT32_ARRAY(reg_set, Exynos4210CombinerState, |
| IIC_REGSET_SIZE), |
| VMSTATE_UINT32_ARRAY(icipsr, Exynos4210CombinerState, 2), |
| VMSTATE_UINT32(external, Exynos4210CombinerState), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| /* |
| * Get Combiner input GPIO into irqs structure |
| */ |
| void exynos4210_combiner_get_gpioin(Exynos4210Irq *irqs, DeviceState *dev, |
| int ext) |
| { |
| int n; |
| int bit; |
| int max; |
| qemu_irq *irq; |
| |
| max = ext ? EXYNOS4210_MAX_EXT_COMBINER_IN_IRQ : |
| EXYNOS4210_MAX_INT_COMBINER_IN_IRQ; |
| irq = ext ? irqs->ext_combiner_irq : irqs->int_combiner_irq; |
| |
| /* |
| * Some IRQs of Int/External Combiner are going to two Combiners groups, |
| * so let split them. |
| */ |
| for (n = 0; n < max; n++) { |
| |
| bit = EXYNOS4210_COMBINER_GET_BIT_NUM(n); |
| |
| switch (n) { |
| /* MDNIE_LCD1 INTG1 */ |
| case EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 0) ... |
| EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 3): |
| irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n), |
| irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(0, bit + 4)]); |
| continue; |
| |
| /* TMU INTG3 */ |
| case EXYNOS4210_COMBINER_GET_IRQ_NUM(3, 4): |
| irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n), |
| irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(2, bit)]); |
| continue; |
| |
| /* LCD1 INTG12 */ |
| case EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 0) ... |
| EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 3): |
| irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n), |
| irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(11, bit + 4)]); |
| continue; |
| |
| /* Multi-Core Timer INTG12 */ |
| case EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 4) ... |
| EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 8): |
| irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n), |
| irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(1, bit + 4)]); |
| continue; |
| |
| /* Multi-Core Timer INTG35 */ |
| case EXYNOS4210_COMBINER_GET_IRQ_NUM(35, 4) ... |
| EXYNOS4210_COMBINER_GET_IRQ_NUM(35, 8): |
| irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n), |
| irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(1, bit + 4)]); |
| continue; |
| |
| /* Multi-Core Timer INTG51 */ |
| case EXYNOS4210_COMBINER_GET_IRQ_NUM(51, 4) ... |
| EXYNOS4210_COMBINER_GET_IRQ_NUM(51, 8): |
| irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n), |
| irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(1, bit + 4)]); |
| continue; |
| |
| /* Multi-Core Timer INTG53 */ |
| case EXYNOS4210_COMBINER_GET_IRQ_NUM(53, 4) ... |
| EXYNOS4210_COMBINER_GET_IRQ_NUM(53, 8): |
| irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n), |
| irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(1, bit + 4)]); |
| continue; |
| } |
| |
| irq[n] = qdev_get_gpio_in(dev, n); |
| } |
| } |
| |
| static uint64_t |
| exynos4210_combiner_read(void *opaque, hwaddr offset, unsigned size) |
| { |
| struct Exynos4210CombinerState *s = |
| (struct Exynos4210CombinerState *)opaque; |
| uint32_t req_quad_base_n; /* Base of registers quad. Multiply it by 4 and |
| get a start of corresponding group quad */ |
| uint32_t grp_quad_base_n; /* Base of group quad */ |
| uint32_t reg_n; /* Register number inside the quad */ |
| uint32_t val; |
| |
| req_quad_base_n = offset >> 4; |
| grp_quad_base_n = req_quad_base_n << 2; |
| reg_n = (offset - (req_quad_base_n << 4)) >> 2; |
| |
| if (req_quad_base_n >= IIC_NGRP) { |
| /* Read of ICIPSR register */ |
| return s->icipsr[reg_n]; |
| } |
| |
| val = 0; |
| |
| switch (reg_n) { |
| /* IISTR */ |
| case 2: |
| val |= s->group[grp_quad_base_n].src_pending; |
| val |= s->group[grp_quad_base_n + 1].src_pending << 8; |
| val |= s->group[grp_quad_base_n + 2].src_pending << 16; |
| val |= s->group[grp_quad_base_n + 3].src_pending << 24; |
| break; |
| /* IIMSR */ |
| case 3: |
| val |= s->group[grp_quad_base_n].src_mask & |
| s->group[grp_quad_base_n].src_pending; |
| val |= (s->group[grp_quad_base_n + 1].src_mask & |
| s->group[grp_quad_base_n + 1].src_pending) << 8; |
| val |= (s->group[grp_quad_base_n + 2].src_mask & |
| s->group[grp_quad_base_n + 2].src_pending) << 16; |
| val |= (s->group[grp_quad_base_n + 3].src_mask & |
| s->group[grp_quad_base_n + 3].src_pending) << 24; |
| break; |
| default: |
| if (offset >> 2 >= IIC_REGSET_SIZE) { |
| hw_error("exynos4210.combiner: overflow of reg_set by 0x" |
| TARGET_FMT_plx "offset\n", offset); |
| } |
| val = s->reg_set[offset >> 2]; |
| return 0; |
| } |
| return val; |
| } |
| |
| static void exynos4210_combiner_update(void *opaque, uint8_t group_n) |
| { |
| struct Exynos4210CombinerState *s = |
| (struct Exynos4210CombinerState *)opaque; |
| |
| /* Send interrupt if needed */ |
| if (s->group[group_n].src_mask & s->group[group_n].src_pending) { |
| #ifdef DEBUG_COMBINER |
| if (group_n != 26) { |
| /* skip uart */ |
| DPRINTF("%s raise IRQ[%d]\n", s->external ? "EXT" : "INT", group_n); |
| } |
| #endif |
| |
| /* Set Combiner interrupt pending status after masking */ |
| if (group_n >= 32) { |
| s->icipsr[1] |= 1 << (group_n - 32); |
| } else { |
| s->icipsr[0] |= 1 << group_n; |
| } |
| |
| qemu_irq_raise(s->output_irq[group_n]); |
| } else { |
| #ifdef DEBUG_COMBINER |
| if (group_n != 26) { |
| /* skip uart */ |
| DPRINTF("%s lower IRQ[%d]\n", s->external ? "EXT" : "INT", group_n); |
| } |
| #endif |
| |
| /* Set Combiner interrupt pending status after masking */ |
| if (group_n >= 32) { |
| s->icipsr[1] &= ~(1 << (group_n - 32)); |
| } else { |
| s->icipsr[0] &= ~(1 << group_n); |
| } |
| |
| qemu_irq_lower(s->output_irq[group_n]); |
| } |
| } |
| |
| static void exynos4210_combiner_write(void *opaque, hwaddr offset, |
| uint64_t val, unsigned size) |
| { |
| struct Exynos4210CombinerState *s = |
| (struct Exynos4210CombinerState *)opaque; |
| uint32_t req_quad_base_n; /* Base of registers quad. Multiply it by 4 and |
| get a start of corresponding group quad */ |
| uint32_t grp_quad_base_n; /* Base of group quad */ |
| uint32_t reg_n; /* Register number inside the quad */ |
| |
| req_quad_base_n = offset >> 4; |
| grp_quad_base_n = req_quad_base_n << 2; |
| reg_n = (offset - (req_quad_base_n << 4)) >> 2; |
| |
| if (req_quad_base_n >= IIC_NGRP) { |
| hw_error("exynos4210.combiner: unallowed write access at offset 0x" |
| TARGET_FMT_plx "\n", offset); |
| return; |
| } |
| |
| if (reg_n > 1) { |
| hw_error("exynos4210.combiner: unallowed write access at offset 0x" |
| TARGET_FMT_plx "\n", offset); |
| return; |
| } |
| |
| if (offset >> 2 >= IIC_REGSET_SIZE) { |
| hw_error("exynos4210.combiner: overflow of reg_set by 0x" |
| TARGET_FMT_plx "offset\n", offset); |
| } |
| s->reg_set[offset >> 2] = val; |
| |
| switch (reg_n) { |
| /* IIESR */ |
| case 0: |
| /* FIXME: what if irq is pending, allowed by mask, and we allow it |
| * again. Interrupt will rise again! */ |
| |
| DPRINTF("%s enable IRQ for groups %d, %d, %d, %d\n", |
| s->external ? "EXT" : "INT", |
| grp_quad_base_n, |
| grp_quad_base_n + 1, |
| grp_quad_base_n + 2, |
| grp_quad_base_n + 3); |
| |
| /* Enable interrupt sources */ |
| s->group[grp_quad_base_n].src_mask |= val & 0xFF; |
| s->group[grp_quad_base_n + 1].src_mask |= (val & 0xFF00) >> 8; |
| s->group[grp_quad_base_n + 2].src_mask |= (val & 0xFF0000) >> 16; |
| s->group[grp_quad_base_n + 3].src_mask |= (val & 0xFF000000) >> 24; |
| |
| exynos4210_combiner_update(s, grp_quad_base_n); |
| exynos4210_combiner_update(s, grp_quad_base_n + 1); |
| exynos4210_combiner_update(s, grp_quad_base_n + 2); |
| exynos4210_combiner_update(s, grp_quad_base_n + 3); |
| break; |
| /* IIECR */ |
| case 1: |
| DPRINTF("%s disable IRQ for groups %d, %d, %d, %d\n", |
| s->external ? "EXT" : "INT", |
| grp_quad_base_n, |
| grp_quad_base_n + 1, |
| grp_quad_base_n + 2, |
| grp_quad_base_n + 3); |
| |
| /* Disable interrupt sources */ |
| s->group[grp_quad_base_n].src_mask &= ~(val & 0xFF); |
| s->group[grp_quad_base_n + 1].src_mask &= ~((val & 0xFF00) >> 8); |
| s->group[grp_quad_base_n + 2].src_mask &= ~((val & 0xFF0000) >> 16); |
| s->group[grp_quad_base_n + 3].src_mask &= ~((val & 0xFF000000) >> 24); |
| |
| exynos4210_combiner_update(s, grp_quad_base_n); |
| exynos4210_combiner_update(s, grp_quad_base_n + 1); |
| exynos4210_combiner_update(s, grp_quad_base_n + 2); |
| exynos4210_combiner_update(s, grp_quad_base_n + 3); |
| break; |
| default: |
| hw_error("exynos4210.combiner: unallowed write access at offset 0x" |
| TARGET_FMT_plx "\n", offset); |
| break; |
| } |
| } |
| |
| /* Get combiner group and bit from irq number */ |
| static uint8_t get_combiner_group_and_bit(int irq, uint8_t *bit) |
| { |
| *bit = irq - ((irq >> 3) << 3); |
| return irq >> 3; |
| } |
| |
| /* Process a change in an external IRQ input. */ |
| static void exynos4210_combiner_handler(void *opaque, int irq, int level) |
| { |
| struct Exynos4210CombinerState *s = |
| (struct Exynos4210CombinerState *)opaque; |
| uint8_t bit_n, group_n; |
| |
| group_n = get_combiner_group_and_bit(irq, &bit_n); |
| |
| if (s->external && group_n >= EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ) { |
| DPRINTF("%s unallowed IRQ group 0x%x\n", s->external ? "EXT" : "INT" |
| , group_n); |
| return; |
| } |
| |
| if (level) { |
| s->group[group_n].src_pending |= 1 << bit_n; |
| } else { |
| s->group[group_n].src_pending &= ~(1 << bit_n); |
| } |
| |
| exynos4210_combiner_update(s, group_n); |
| } |
| |
| static void exynos4210_combiner_reset(DeviceState *d) |
| { |
| struct Exynos4210CombinerState *s = (struct Exynos4210CombinerState *)d; |
| |
| memset(&s->group, 0, sizeof(s->group)); |
| memset(&s->reg_set, 0, sizeof(s->reg_set)); |
| |
| s->reg_set[0xC0 >> 2] = 0x01010101; |
| s->reg_set[0xC4 >> 2] = 0x01010101; |
| s->reg_set[0xD0 >> 2] = 0x01010101; |
| s->reg_set[0xD4 >> 2] = 0x01010101; |
| } |
| |
| static const MemoryRegionOps exynos4210_combiner_ops = { |
| .read = exynos4210_combiner_read, |
| .write = exynos4210_combiner_write, |
| .endianness = DEVICE_NATIVE_ENDIAN, |
| }; |
| |
| /* |
| * Internal Combiner initialization. |
| */ |
| static int exynos4210_combiner_init(SysBusDevice *dev) |
| { |
| unsigned int i; |
| struct Exynos4210CombinerState *s = |
| FROM_SYSBUS(struct Exynos4210CombinerState, dev); |
| |
| /* Allocate general purpose input signals and connect a handler to each of |
| * them */ |
| qdev_init_gpio_in(&s->busdev.qdev, exynos4210_combiner_handler, IIC_NIRQ); |
| |
| /* Connect SysBusDev irqs to device specific irqs */ |
| for (i = 0; i < IIC_NIRQ; i++) { |
| sysbus_init_irq(dev, &s->output_irq[i]); |
| } |
| |
| memory_region_init_io(&s->iomem, &exynos4210_combiner_ops, s, |
| "exynos4210-combiner", IIC_REGION_SIZE); |
| sysbus_init_mmio(dev, &s->iomem); |
| |
| return 0; |
| } |
| |
| static Property exynos4210_combiner_properties[] = { |
| DEFINE_PROP_UINT32("external", Exynos4210CombinerState, external, 0), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static void exynos4210_combiner_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
| |
| k->init = exynos4210_combiner_init; |
| dc->reset = exynos4210_combiner_reset; |
| dc->props = exynos4210_combiner_properties; |
| dc->vmsd = &vmstate_exynos4210_combiner; |
| } |
| |
| static const TypeInfo exynos4210_combiner_info = { |
| .name = "exynos4210.combiner", |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(Exynos4210CombinerState), |
| .class_init = exynos4210_combiner_class_init, |
| }; |
| |
| static void exynos4210_combiner_register_types(void) |
| { |
| type_register_static(&exynos4210_combiner_info); |
| } |
| |
| type_init(exynos4210_combiner_register_types) |
