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

/*
 * Samsung exynos4210 Interrupt Combiner
 *
 * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd.
 * All rights reserved.
 *
 * Evgeny Voevodin <[email protected]>
 *
 * 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/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;

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