[mirror_qemu.git] / hw / intc / exynos4210_combiner.c

/*
 * 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 "qemu/osdep.h"
#include "hw/sysbus.h"
#include "qemu/module.h"

#include "hw/arm/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;

#define TYPE_EXYNOS4210_COMBINER "exynos4210.combiner"
#define EXYNOS4210_COMBINER(obj) \
    OBJECT_CHECK(Exynos4210CombinerState, (obj), TYPE_EXYNOS4210_COMBINER)

typedef struct Exynos4210CombinerState {
    SysBusDevice parent_obj;

    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,
    .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,
    .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 void exynos4210_combiner_init(Object *obj)
{
    DeviceState *dev = DEVICE(obj);
    Exynos4210CombinerState *s = EXYNOS4210_COMBINER(obj);
    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
    unsigned int i;

    /* Allocate general purpose input signals and connect a handler to each of
     * them */
    qdev_init_gpio_in(dev, exynos4210_combiner_handler, IIC_NIRQ);

    /* Connect SysBusDev irqs to device specific irqs */
    for (i = 0; i < IIC_NGRP; i++) {
        sysbus_init_irq(sbd, &s->output_irq[i]);
    }

    memory_region_init_io(&s->iomem, obj, &exynos4210_combiner_ops, s,
                          "exynos4210-combiner", IIC_REGION_SIZE);
    sysbus_init_mmio(sbd, &s->iomem);
}

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);

    dc->reset = exynos4210_combiner_reset;
    dc->props = exynos4210_combiner_properties;
    dc->vmsd = &vmstate_exynos4210_combiner;
}

static const TypeInfo exynos4210_combiner_info = {
    .name          = TYPE_EXYNOS4210_COMBINER,
    .parent        = TYPE_SYS_BUS_DEVICE,
    .instance_size = sizeof(Exynos4210CombinerState),
    .instance_init = exynos4210_combiner_init,
    .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)
Commit	Line	Data
8e03cf1e EV	1	/*
	2	* Samsung exynos4210 Interrupt Combiner
	3	*
	4	* Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd.
	5	* All rights reserved.
	6	*
	7	* Evgeny Voevodin <e.voevodin@samsung.com>
	8	*
	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.
	13	*
	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.
	18	*
	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/>.
	21	*/
	22
	23	/*
	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.
	28	*/
	29
8ef94f0b	30	#include "qemu/osdep.h"
83c9f4ca	31	#include "hw/sysbus.h"
0b8fa32f	32	#include "qemu/module.h"
8e03cf1e	33
0d09e41a	34	#include "hw/arm/exynos4210.h"
8e03cf1e EV	35
	36	//#define DEBUG_COMBINER
	37
	38	#ifdef DEBUG_COMBINER
	39	#define DPRINTF(fmt, ...) \
	40	do { fprintf(stdout, "COMBINER: [%s:%d] " fmt, __func__ , __LINE__, \
	41	## __VA_ARGS__); } while (0)
	42	#else
	43	#define DPRINTF(fmt, ...) do {} while (0)
	44	#endif
	45
	46	#define IIC_NGRP 64 /* Internal Interrupt Combiner
	47	Groups number */
	48	#define IIC_NIRQ (IIC_NGRP * 8)/* Internal Interrupt Combiner
	49	Interrupts number */
	50	#define IIC_REGION_SIZE 0x108 /* Size of memory mapped region */
	51	#define IIC_REGSET_SIZE 0x41
	52
	53	/*
	54	* State for each output signal of internal combiner
	55	*/
	56	typedef struct CombinerGroupState {
	57	uint8_t src_mask; /* 1 - source enabled, 0 - disabled */
	58	uint8_t src_pending; /* Pending source interrupts before masking */
	59	} CombinerGroupState;
	60
c03c6b9c AF	61	#define TYPE_EXYNOS4210_COMBINER "exynos4210.combiner"
	62	#define EXYNOS4210_COMBINER(obj) \
	63	OBJECT_CHECK(Exynos4210CombinerState, (obj), TYPE_EXYNOS4210_COMBINER)
	64
8e03cf1e	65	typedef struct Exynos4210CombinerState {
c03c6b9c AF	66	SysBusDevice parent_obj;
c03c6b9c AF	67
8e03cf1e EV	68	MemoryRegion iomem;
	69
	70	struct CombinerGroupState group[IIC_NGRP];
	71	uint32_t reg_set[IIC_REGSET_SIZE];
	72	uint32_t icipsr[2];
	73	uint32_t external; /* 1 means that this combiner is external */
	74
	75	qemu_irq output_irq[IIC_NGRP];
	76	} Exynos4210CombinerState;
	77
	78	static const VMStateDescription vmstate_exynos4210_combiner_group_state = {
	79	.name = "exynos4210.combiner.groupstate",
	80	.version_id = 1,
	81	.minimum_version_id = 1,
8e03cf1e EV	82	.fields = (VMStateField[]) {
	83	VMSTATE_UINT8(src_mask, CombinerGroupState),
	84	VMSTATE_UINT8(src_pending, CombinerGroupState),
	85	VMSTATE_END_OF_LIST()
	86	}
	87	};
	88
	89	static const VMStateDescription vmstate_exynos4210_combiner = {
	90	.name = "exynos4210.combiner",
	91	.version_id = 1,
	92	.minimum_version_id = 1,
8e03cf1e EV	93	.fields = (VMStateField[]) {
	94	VMSTATE_STRUCT_ARRAY(group, Exynos4210CombinerState, IIC_NGRP, 0,
	95	vmstate_exynos4210_combiner_group_state, CombinerGroupState),
	96	VMSTATE_UINT32_ARRAY(reg_set, Exynos4210CombinerState,
	97	IIC_REGSET_SIZE),
	98	VMSTATE_UINT32_ARRAY(icipsr, Exynos4210CombinerState, 2),
	99	VMSTATE_UINT32(external, Exynos4210CombinerState),
	100	VMSTATE_END_OF_LIST()
	101	}
	102	};
	103
	104	/*
	105	* Get Combiner input GPIO into irqs structure
	106	*/
	107	void exynos4210_combiner_get_gpioin(Exynos4210Irq irqs, DeviceState dev,
	108	int ext)
	109	{
	110	int n;
	111	int bit;
	112	int max;
	113	qemu_irq *irq;
	114
	115	max = ext ? EXYNOS4210_MAX_EXT_COMBINER_IN_IRQ :
	116	EXYNOS4210_MAX_INT_COMBINER_IN_IRQ;
	117	irq = ext ? irqs->ext_combiner_irq : irqs->int_combiner_irq;
	118
	119	/*
	120	* Some IRQs of Int/External Combiner are going to two Combiners groups,
	121	* so let split them.
	122	*/
	123	for (n = 0; n < max; n++) {
	124
	125	bit = EXYNOS4210_COMBINER_GET_BIT_NUM(n);
	126
	127	switch (n) {
	128	/* MDNIE_LCD1 INTG1 */
	129	case EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 0) ...
	130	EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 3):
	131	irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
	132	irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(0, bit + 4)]);
	133	continue;
	134
	135	/* TMU INTG3 */
	136	case EXYNOS4210_COMBINER_GET_IRQ_NUM(3, 4):
	137	irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
	138	irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(2, bit)]);
	139	continue;
	140
	141	/* LCD1 INTG12 */
	142	case EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 0) ...
	143	EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 3):
	144	irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
	145	irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(11, bit + 4)]);
	146	continue;
	147
	148	/* Multi-Core Timer INTG12 */
	149	case EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 4) ...
	150	EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 8):
	151	irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
	152	irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(1, bit + 4)]);
	153	continue;
	154
	155	/* Multi-Core Timer INTG35 */
	156	case EXYNOS4210_COMBINER_GET_IRQ_NUM(35, 4) ...
157	EXYNOS4210_COMBINER_GET_IRQ_NUM(35, 8):
158	irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
159	irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(1, bit + 4)]);
160	continue;
161
162	/* Multi-Core Timer INTG51 */
163	case EXYNOS4210_COMBINER_GET_IRQ_NUM(51, 4) ...
164	EXYNOS4210_COMBINER_GET_IRQ_NUM(51, 8):
165	irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
166	irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(1, bit + 4)]);
167	continue;
168
169	/* Multi-Core Timer INTG53 */
170	case EXYNOS4210_COMBINER_GET_IRQ_NUM(53, 4) ...
171	EXYNOS4210_COMBINER_GET_IRQ_NUM(53, 8):
172	irq[n] = qemu_irq_split(qdev_get_gpio_in(dev, n),
173	irq[EXYNOS4210_COMBINER_GET_IRQ_NUM(1, bit + 4)]);
174	continue;
175	}
176
177	irq[n] = qdev_get_gpio_in(dev, n);
178	}
179	}
180
181	static uint64_t
a8170e5e	182	exynos4210_combiner_read(void *opaque, hwaddr offset, unsigned size)
8e03cf1e EV	183	{
	184	struct Exynos4210CombinerState *s =
	185	(struct Exynos4210CombinerState *)opaque;
	186	uint32_t req_quad_base_n; /* Base of registers quad. Multiply it by 4 and
	187	get a start of corresponding group quad */
	188	uint32_t grp_quad_base_n; /* Base of group quad */
	189	uint32_t reg_n; /* Register number inside the quad */
	190	uint32_t val;
	191
8e03cf1e EV	192	req_quad_base_n = offset >> 4;
	193	grp_quad_base_n = req_quad_base_n << 2;
	194	reg_n = (offset - (req_quad_base_n << 4)) >> 2;
	195
	196	if (req_quad_base_n >= IIC_NGRP) {
	197	/* Read of ICIPSR register */
	198	return s->icipsr[reg_n];
	199	}
	200
	201	val = 0;
	202
	203	switch (reg_n) {
	204	/* IISTR */
	205	case 2:
	206	val \|= s->group[grp_quad_base_n].src_pending;
	207	val \|= s->group[grp_quad_base_n + 1].src_pending << 8;
	208	val \|= s->group[grp_quad_base_n + 2].src_pending << 16;
	209	val \|= s->group[grp_quad_base_n + 3].src_pending << 24;
	210	break;
	211	/* IIMSR */
	212	case 3:
	213	val \|= s->group[grp_quad_base_n].src_mask &
	214	s->group[grp_quad_base_n].src_pending;
	215	val \|= (s->group[grp_quad_base_n + 1].src_mask &
	216	s->group[grp_quad_base_n + 1].src_pending) << 8;
	217	val \|= (s->group[grp_quad_base_n + 2].src_mask &
	218	s->group[grp_quad_base_n + 2].src_pending) << 16;
	219	val \|= (s->group[grp_quad_base_n + 3].src_mask &
	220	s->group[grp_quad_base_n + 3].src_pending) << 24;
	221	break;
	222	default:
	223	if (offset >> 2 >= IIC_REGSET_SIZE) {
	224	hw_error("exynos4210.combiner: overflow of reg_set by 0x"
	225	TARGET_FMT_plx "offset\n", offset);
	226	}
	227	val = s->reg_set[offset >> 2];
	228	return 0;
	229	}
	230	return val;
	231	}
	232
	233	static void exynos4210_combiner_update(void *opaque, uint8_t group_n)
	234	{
	235	struct Exynos4210CombinerState *s =
	236	(struct Exynos4210CombinerState *)opaque;
	237
	238	/* Send interrupt if needed */
	239	if (s->group[group_n].src_mask & s->group[group_n].src_pending) {
	240	#ifdef DEBUG_COMBINER
	241	if (group_n != 26) {
	242	/* skip uart */
	243	DPRINTF("%s raise IRQ[%d]\n", s->external ? "EXT" : "INT", group_n);
	244	}
	245	#endif
	246
	247	/* Set Combiner interrupt pending status after masking */
	248	if (group_n >= 32) {
	249	s->icipsr[1] \|= 1 << (group_n - 32);
	250	} else {
	251	s->icipsr[0] \|= 1 << group_n;
	252	}
	253
	254	qemu_irq_raise(s->output_irq[group_n]);
	255	} else {
256	#ifdef DEBUG_COMBINER
257	if (group_n != 26) {
258	/* skip uart */
259	DPRINTF("%s lower IRQ[%d]\n", s->external ? "EXT" : "INT", group_n);
260	}
261	#endif
262
263	/* Set Combiner interrupt pending status after masking */
264	if (group_n >= 32) {
265	s->icipsr[1] &= ~(1 << (group_n - 32));
266	} else {
267	s->icipsr[0] &= ~(1 << group_n);
268	}
269
270	qemu_irq_lower(s->output_irq[group_n]);
271	}
272	}
273
a8170e5e	274	static void exynos4210_combiner_write(void *opaque, hwaddr offset,
8e03cf1e EV	275	uint64_t val, unsigned size)
	276	{
	277	struct Exynos4210CombinerState *s =
	278	(struct Exynos4210CombinerState *)opaque;
	279	uint32_t req_quad_base_n; /* Base of registers quad. Multiply it by 4 and
	280	get a start of corresponding group quad */
	281	uint32_t grp_quad_base_n; /* Base of group quad */
	282	uint32_t reg_n; /* Register number inside the quad */
	283
8e03cf1e EV	284	req_quad_base_n = offset >> 4;
	285	grp_quad_base_n = req_quad_base_n << 2;
	286	reg_n = (offset - (req_quad_base_n << 4)) >> 2;
	287
	288	if (req_quad_base_n >= IIC_NGRP) {
	289	hw_error("exynos4210.combiner: unallowed write access at offset 0x"
	290	TARGET_FMT_plx "\n", offset);
	291	return;
	292	}
	293
	294	if (reg_n > 1) {
	295	hw_error("exynos4210.combiner: unallowed write access at offset 0x"
	296	TARGET_FMT_plx "\n", offset);
	297	return;
	298	}
	299
	300	if (offset >> 2 >= IIC_REGSET_SIZE) {
	301	hw_error("exynos4210.combiner: overflow of reg_set by 0x"
	302	TARGET_FMT_plx "offset\n", offset);
	303	}
	304	s->reg_set[offset >> 2] = val;
	305
	306	switch (reg_n) {
	307	/* IIESR */
	308	case 0:
	309	/* FIXME: what if irq is pending, allowed by mask, and we allow it
	310	* again. Interrupt will rise again! */
	311
	312	DPRINTF("%s enable IRQ for groups %d, %d, %d, %d\n",
	313	s->external ? "EXT" : "INT",
	314	grp_quad_base_n,
	315	grp_quad_base_n + 1,
	316	grp_quad_base_n + 2,
	317	grp_quad_base_n + 3);
	318
	319	/* Enable interrupt sources */
	320	s->group[grp_quad_base_n].src_mask \|= val & 0xFF;
	321	s->group[grp_quad_base_n + 1].src_mask \|= (val & 0xFF00) >> 8;
	322	s->group[grp_quad_base_n + 2].src_mask \|= (val & 0xFF0000) >> 16;
	323	s->group[grp_quad_base_n + 3].src_mask \|= (val & 0xFF000000) >> 24;
	324
	325	exynos4210_combiner_update(s, grp_quad_base_n);
	326	exynos4210_combiner_update(s, grp_quad_base_n + 1);
	327	exynos4210_combiner_update(s, grp_quad_base_n + 2);
	328	exynos4210_combiner_update(s, grp_quad_base_n + 3);
	329	break;
	330	/* IIECR */
	331	case 1:
	332	DPRINTF("%s disable IRQ for groups %d, %d, %d, %d\n",
	333	s->external ? "EXT" : "INT",
	334	grp_quad_base_n,
	335	grp_quad_base_n + 1,
	336	grp_quad_base_n + 2,
	337	grp_quad_base_n + 3);
	338
	339	/* Disable interrupt sources */
	340	s->group[grp_quad_base_n].src_mask &= ~(val & 0xFF);
	341	s->group[grp_quad_base_n + 1].src_mask &= ~((val & 0xFF00) >> 8);
	342	s->group[grp_quad_base_n + 2].src_mask &= ~((val & 0xFF0000) >> 16);
	343	s->group[grp_quad_base_n + 3].src_mask &= ~((val & 0xFF000000) >> 24);
	344
	345	exynos4210_combiner_update(s, grp_quad_base_n);
	346	exynos4210_combiner_update(s, grp_quad_base_n + 1);
	347	exynos4210_combiner_update(s, grp_quad_base_n + 2);
348	exynos4210_combiner_update(s, grp_quad_base_n + 3);
349	break;
350	default:
351	hw_error("exynos4210.combiner: unallowed write access at offset 0x"
352	TARGET_FMT_plx "\n", offset);
353	break;
354	}
8e03cf1e EV	355	}
	356
	357	/* Get combiner group and bit from irq number */
	358	static uint8_t get_combiner_group_and_bit(int irq, uint8_t *bit)
	359	{
	360	*bit = irq - ((irq >> 3) << 3);
	361	return irq >> 3;
	362	}
	363
	364	/* Process a change in an external IRQ input. */
	365	static void exynos4210_combiner_handler(void *opaque, int irq, int level)
	366	{
	367	struct Exynos4210CombinerState *s =
	368	(struct Exynos4210CombinerState *)opaque;
	369	uint8_t bit_n, group_n;
	370
	371	group_n = get_combiner_group_and_bit(irq, &bit_n);
	372
	373	if (s->external && group_n >= EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ) {
	374	DPRINTF("%s unallowed IRQ group 0x%x\n", s->external ? "EXT" : "INT"
	375	, group_n);
	376	return;
	377	}
	378
	379	if (level) {
	380	s->group[group_n].src_pending \|= 1 << bit_n;
	381	} else {
	382	s->group[group_n].src_pending &= ~(1 << bit_n);
	383	}
	384
	385	exynos4210_combiner_update(s, group_n);
8e03cf1e EV	386	}
	387
	388	static void exynos4210_combiner_reset(DeviceState *d)
	389	{
	390	struct Exynos4210CombinerState s = (struct Exynos4210CombinerState )d;
	391
	392	memset(&s->group, 0, sizeof(s->group));
	393	memset(&s->reg_set, 0, sizeof(s->reg_set));
	394
	395	s->reg_set[0xC0 >> 2] = 0x01010101;
	396	s->reg_set[0xC4 >> 2] = 0x01010101;
	397	s->reg_set[0xD0 >> 2] = 0x01010101;
	398	s->reg_set[0xD4 >> 2] = 0x01010101;
	399	}
	400
	401	static const MemoryRegionOps exynos4210_combiner_ops = {
	402	.read = exynos4210_combiner_read,
	403	.write = exynos4210_combiner_write,
	404	.endianness = DEVICE_NATIVE_ENDIAN,
	405	};
	406
	407	/*
	408	* Internal Combiner initialization.
	409	*/
d3d5a6fe	410	static void exynos4210_combiner_init(Object *obj)
8e03cf1e	411	{
d3d5a6fe XZ	412	DeviceState *dev = DEVICE(obj);
	413	Exynos4210CombinerState *s = EXYNOS4210_COMBINER(obj);
	414	SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
8e03cf1e	415	unsigned int i;
8e03cf1e EV	416
	417	/* Allocate general purpose input signals and connect a handler to each of
	418	* them */
c03c6b9c	419	qdev_init_gpio_in(dev, exynos4210_combiner_handler, IIC_NIRQ);
8e03cf1e EV	420
8e03cf1e EV	421	/* Connect SysBusDev irqs to device specific irqs */
fce0a826	422	for (i = 0; i < IIC_NGRP; i++) {
c03c6b9c	423	sysbus_init_irq(sbd, &s->output_irq[i]);
8e03cf1e EV	424	}
8e03cf1e EV	425
d3d5a6fe	426	memory_region_init_io(&s->iomem, obj, &exynos4210_combiner_ops, s,
c03c6b9c AF	427	"exynos4210-combiner", IIC_REGION_SIZE);
c03c6b9c AF	428	sysbus_init_mmio(sbd, &s->iomem);
8e03cf1e EV	429	}
	430
	431	static Property exynos4210_combiner_properties[] = {
	432	DEFINE_PROP_UINT32("external", Exynos4210CombinerState, external, 0),
	433	DEFINE_PROP_END_OF_LIST(),
	434	};
	435
	436	static void exynos4210_combiner_class_init(ObjectClass klass, void data)
	437	{
	438	DeviceClass *dc = DEVICE_CLASS(klass);
8e03cf1e	439
8e03cf1e EV	440	dc->reset = exynos4210_combiner_reset;
	441	dc->props = exynos4210_combiner_properties;
	442	dc->vmsd = &vmstate_exynos4210_combiner;
	443	}
	444
8c43a6f0	445	static const TypeInfo exynos4210_combiner_info = {
c03c6b9c	446	.name = TYPE_EXYNOS4210_COMBINER,
8e03cf1e EV	447	.parent = TYPE_SYS_BUS_DEVICE,
8e03cf1e EV	448	.instance_size = sizeof(Exynos4210CombinerState),
d3d5a6fe	449	.instance_init = exynos4210_combiner_init,
8e03cf1e EV	450	.class_init = exynos4210_combiner_class_init,
	451	};
	452
	453	static void exynos4210_combiner_register_types(void)
	454	{
	455	type_register_static(&exynos4210_combiner_info);
	456	}
	457
	458	type_init(exynos4210_combiner_register_types)