/*
 * S3C24XX IRQ handling
 *
 * Copyright (c) 2003-2004 Simtec Electronics
 *      Ben Dooks <ben@simtec.co.uk>
 * Copyright (c) 2012 Heiko Stuebner <heiko@sntech.de>
 *
 * 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.
*/

#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/irqdomain.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>

#include <asm/exception.h>
#include <asm/mach/irq.h>

#include <mach/regs-irq.h>
#include <mach/regs-gpio.h>

#include <plat/cpu.h>
#include <plat/regs-irqtype.h>
#include <plat/pm.h>

#include "irqchip.h"

#define S3C_IRQTYPE_NONE        0
#define S3C_IRQTYPE_EINT        1
#define S3C_IRQTYPE_EDGE        2
#define S3C_IRQTYPE_LEVEL       3

struct s3c_irq_data {
        unsigned int type;
        unsigned long offset;
        unsigned long parent_irq;

        /* data gets filled during init */
        struct s3c_irq_intc *intc;
        unsigned long sub_bits;
        struct s3c_irq_intc *sub_intc;
};

/*
 * Sructure holding the controller data
 * @reg_pending         register holding pending irqs
 * @reg_intpnd          special register intpnd in main intc
 * @reg_mask            mask register
 * @domain              irq_domain of the controller
 * @parent              parent controller for ext and sub irqs
 * @irqs                irq-data, always s3c_irq_data[32]
 */
struct s3c_irq_intc {
        void __iomem            *reg_pending;
        void __iomem            *reg_intpnd;
        void __iomem            *reg_mask;
        struct irq_domain       *domain;
        struct s3c_irq_intc     *parent;
        struct s3c_irq_data     *irqs;
};

/*
 * Array holding pointers to the global controller structs
 * [0] ... main_intc
 * [1] ... sub_intc
 * [2] ... main_intc2 on s3c2416
 */
static struct s3c_irq_intc *s3c_intc[3];

static void s3c_irq_mask(struct irq_data *data)
{
        struct s3c_irq_data *irq_data = irq_data_get_irq_chip_data(data);
        struct s3c_irq_intc *intc = irq_data->intc;
        struct s3c_irq_intc *parent_intc = intc->parent;
        struct s3c_irq_data *parent_data;
        unsigned long mask;
        unsigned int irqno;

        mask = __raw_readl(intc->reg_mask);
        mask |= (1UL << irq_data->offset);
        __raw_writel(mask, intc->reg_mask);

        if (parent_intc) {
                parent_data = &parent_intc->irqs[irq_data->parent_irq];

                /* check to see if we need to mask the parent IRQ
                 * The parent_irq is always in main_intc, so the hwirq
                 * for find_mapping does not need an offset in any case.
                 */
                if ((mask & parent_data->sub_bits) == parent_data->sub_bits) {
                        irqno = irq_find_mapping(parent_intc->domain,
                                         irq_data->parent_irq);
                        s3c_irq_mask(irq_get_irq_data(irqno));
                }
        }
}

static void s3c_irq_unmask(struct irq_data *data)
{
        struct s3c_irq_data *irq_data = irq_data_get_irq_chip_data(data);
        struct s3c_irq_intc *intc = irq_data->intc;
        struct s3c_irq_intc *parent_intc = intc->parent;
        unsigned long mask;
        unsigned int irqno;

        mask = __raw_readl(intc->reg_mask);
        mask &= ~(1UL << irq_data->offset);
        __raw_writel(mask, intc->reg_mask);

        if (parent_intc) {
                irqno = irq_find_mapping(parent_intc->domain,
                                         irq_data->parent_irq);
                s3c_irq_unmask(irq_get_irq_data(irqno));
        }
}

static inline void s3c_irq_ack(struct irq_data *data)
{
        struct s3c_irq_data *irq_data = irq_data_get_irq_chip_data(data);
        struct s3c_irq_intc *intc = irq_data->intc;
        unsigned long bitval = 1UL << irq_data->offset;

        __raw_writel(bitval, intc->reg_pending);
        if (intc->reg_intpnd)
                __raw_writel(bitval, intc->reg_intpnd);
}

static int s3c_irq_type(struct irq_data *data, unsigned int type)
{
        switch (type) {
        case IRQ_TYPE_NONE:
                break;
        case IRQ_TYPE_EDGE_RISING:
        case IRQ_TYPE_EDGE_FALLING:
        case IRQ_TYPE_EDGE_BOTH:
                irq_set_handler(data->irq, handle_edge_irq);
                break;
        case IRQ_TYPE_LEVEL_LOW:
        case IRQ_TYPE_LEVEL_HIGH:
                irq_set_handler(data->irq, handle_level_irq);
                break;
        default:
                pr_err("No such irq type %d", type);
                return -EINVAL;
        }

        return 0;
}

static int s3c_irqext_type_set(void __iomem *gpcon_reg,
                               void __iomem *extint_reg,
                               unsigned long gpcon_offset,
                               unsigned long extint_offset,
                               unsigned int type)
{
        unsigned long newvalue = 0, value;

        /* Set the GPIO to external interrupt mode */
        value = __raw_readl(gpcon_reg);
        value = (value & ~(3 << gpcon_offset)) | (0x02 << gpcon_offset);
        __raw_writel(value, gpcon_reg);

        /* Set the external interrupt to pointed trigger type */
        switch (type)
        {
                case IRQ_TYPE_NONE:
                        pr_warn("No edge setting!\n");
                        break;

                case IRQ_TYPE_EDGE_RISING:
                        newvalue = S3C2410_EXTINT_RISEEDGE;
                        break;

                case IRQ_TYPE_EDGE_FALLING:
                        newvalue = S3C2410_EXTINT_FALLEDGE;
                        break;

                case IRQ_TYPE_EDGE_BOTH:
                        newvalue = S3C2410_EXTINT_BOTHEDGE;
                        break;

                case IRQ_TYPE_LEVEL_LOW:
                        newvalue = S3C2410_EXTINT_LOWLEV;
                        break;

                case IRQ_TYPE_LEVEL_HIGH:
                        newvalue = S3C2410_EXTINT_HILEV;
                        break;

                default:
                        pr_err("No such irq type %d", type);
                        return -EINVAL;
        }

        value = __raw_readl(extint_reg);
        value = (value & ~(7 << extint_offset)) | (newvalue << extint_offset);
        __raw_writel(value, extint_reg);

        return 0;
}

static int s3c_irqext_type(struct irq_data *data, unsigned int type)
{
        void __iomem *extint_reg;
        void __iomem *gpcon_reg;
        unsigned long gpcon_offset, extint_offset;

        if ((data->hwirq >= 4) && (data->hwirq <= 7)) {
                gpcon_reg = S3C2410_GPFCON;
                extint_reg = S3C24XX_EXTINT0;
                gpcon_offset = (data->hwirq) * 2;
                extint_offset = (data->hwirq) * 4;
        } else if ((data->hwirq >= 8) && (data->hwirq <= 15)) {
                gpcon_reg = S3C2410_GPGCON;
                extint_reg = S3C24XX_EXTINT1;
                gpcon_offset = (data->hwirq - 8) * 2;
                extint_offset = (data->hwirq - 8) * 4;
        } else if ((data->hwirq >= 16) && (data->hwirq <= 23)) {
                gpcon_reg = S3C2410_GPGCON;
                extint_reg = S3C24XX_EXTINT2;
                gpcon_offset = (data->hwirq - 8) * 2;
                extint_offset = (data->hwirq - 16) * 4;
        } else {
                return -EINVAL;
        }

        return s3c_irqext_type_set(gpcon_reg, extint_reg, gpcon_offset,
                                   extint_offset, type);
}

static int s3c_irqext0_type(struct irq_data *data, unsigned int type)
{
        void __iomem *extint_reg;
        void __iomem *gpcon_reg;
        unsigned long gpcon_offset, extint_offset;

        if ((data->hwirq >= 0) && (data->hwirq <= 3)) {
                gpcon_reg = S3C2410_GPFCON;
                extint_reg = S3C24XX_EXTINT0;
                gpcon_offset = (data->hwirq) * 2;
                extint_offset = (data->hwirq) * 4;
        } else {
                return -EINVAL;
        }

        return s3c_irqext_type_set(gpcon_reg, extint_reg, gpcon_offset,
                                   extint_offset, type);
}

static struct irq_chip s3c_irq_chip = {
        .name           = "s3c",
        .irq_ack        = s3c_irq_ack,
        .irq_mask       = s3c_irq_mask,
        .irq_unmask     = s3c_irq_unmask,
        .irq_set_type   = s3c_irq_type,
        .irq_set_wake   = s3c_irq_wake
};

static struct irq_chip s3c_irq_level_chip = {
        .name           = "s3c-level",
        .irq_mask       = s3c_irq_mask,
        .irq_unmask     = s3c_irq_unmask,
        .irq_ack        = s3c_irq_ack,
        .irq_set_type   = s3c_irq_type,
};

static struct irq_chip s3c_irqext_chip = {
        .name           = "s3c-ext",
        .irq_mask       = s3c_irq_mask,
        .irq_unmask     = s3c_irq_unmask,
        .irq_ack        = s3c_irq_ack,
        .irq_set_type   = s3c_irqext_type,
        .irq_set_wake   = s3c_irqext_wake
};

static struct irq_chip s3c_irq_eint0t4 = {
        .name           = "s3c-ext0",
        .irq_ack        = s3c_irq_ack,
        .irq_mask       = s3c_irq_mask,
        .irq_unmask     = s3c_irq_unmask,
        .irq_set_wake   = s3c_irq_wake,
        .irq_set_type   = s3c_irqext0_type,
};

static void s3c_irq_demux(unsigned int irq, struct irq_desc *desc)
{
        struct irq_chip *chip = irq_desc_get_chip(desc);
        struct s3c_irq_data *irq_data = irq_desc_get_chip_data(desc);
        struct s3c_irq_intc *intc = irq_data->intc;
        struct s3c_irq_intc *sub_intc = irq_data->sub_intc;
        unsigned long src;
        unsigned long msk;
        unsigned int n;
        unsigned int offset;

        /* we're using individual domains for the non-dt case
         * and one big domain for the dt case where the subintc
         * starts at hwirq number 32.
         */
        offset = (intc->domain->of_node) ? 32 : 0;

        chained_irq_enter(chip, desc);

        src = __raw_readl(sub_intc->reg_pending);
        msk = __raw_readl(sub_intc->reg_mask);

        src &= ~msk;
        src &= irq_data->sub_bits;

        while (src) {
                n = __ffs(src);
                src &= ~(1 << n);
                irq = irq_find_mapping(sub_intc->domain, offset + n);
                generic_handle_irq(irq);
        }

        chained_irq_exit(chip, desc);
}

static inline int s3c24xx_handle_intc(struct s3c_irq_intc *intc,
                                      struct pt_regs *regs, int intc_offset)
{
        int pnd;
        int offset;
        int irq;

        pnd = __raw_readl(intc->reg_intpnd);
        if (!pnd)
                return false;

        /* non-dt machines use individual domains */
        if (!intc->domain->of_node)
                intc_offset = 0;

        /* We have a problem that the INTOFFSET register does not always
         * show one interrupt. Occasionally we get two interrupts through
         * the prioritiser, and this causes the INTOFFSET register to show
         * what looks like the logical-or of the two interrupt numbers.
         *
         * Thanks to Klaus, Shannon, et al for helping to debug this problem
         */
        offset = __raw_readl(intc->reg_intpnd + 4);

        /* Find the bit manually, when the offset is wrong.
         * The pending register only ever contains the one bit of the next
         * interrupt to handle.
         */
        if (!(pnd & (1 << offset)))
                offset =  __ffs(pnd);

        irq = irq_find_mapping(intc->domain, intc_offset + offset);
        handle_IRQ(irq, regs);
        return true;
}

asmlinkage void __exception_irq_entry s3c24xx_handle_irq(struct pt_regs *regs)
{
        do {
                if (likely(s3c_intc[0]))
                        if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
                                continue;

                if (s3c_intc[2])
                        if (s3c24xx_handle_intc(s3c_intc[2], regs, 64))
                                continue;

                break;
        } while (1);
}

#ifdef CONFIG_FIQ
/**
 * s3c24xx_set_fiq - set the FIQ routing
 * @irq: IRQ number to route to FIQ on processor.
 * @on: Whether to route @irq to the FIQ, or to remove the FIQ routing.
 *
 * Change the state of the IRQ to FIQ routing depending on @irq and @on. If
 * @on is true, the @irq is checked to see if it can be routed and the
 * interrupt controller updated to route the IRQ. If @on is false, the FIQ
 * routing is cleared, regardless of which @irq is specified.
 */
int s3c24xx_set_fiq(unsigned int irq, bool on)
{
        u32 intmod;
        unsigned offs;

        if (on) {
                offs = irq - FIQ_START;
                if (offs > 31)
                        return -EINVAL;

                intmod = 1 << offs;
        } else {
                intmod = 0;
        }

        __raw_writel(intmod, S3C2410_INTMOD);
        return 0;
}

EXPORT_SYMBOL_GPL(s3c24xx_set_fiq);
#endif

static int s3c24xx_irq_map(struct irq_domain *h, unsigned int virq,
                                                        irq_hw_number_t hw)
{
        struct s3c_irq_intc *intc = h->host_data;
        struct s3c_irq_data *irq_data = &intc->irqs[hw];
        struct s3c_irq_intc *parent_intc;
        struct s3c_irq_data *parent_irq_data;
        unsigned int irqno;

        /* attach controller pointer to irq_data */
        irq_data->intc = intc;
        irq_data->offset = hw;

        parent_intc = intc->parent;

        /* set handler and flags */
        switch (irq_data->type) {
        case S3C_IRQTYPE_NONE:
                return 0;
        case S3C_IRQTYPE_EINT:
                /* On the S3C2412, the EINT0to3 have a parent irq
                 * but need the s3c_irq_eint0t4 chip
                 */
                if (parent_intc && (!soc_is_s3c2412() || hw >= 4))
                        irq_set_chip_and_handler(virq, &s3c_irqext_chip,
                                                 handle_edge_irq);
                else
                        irq_set_chip_and_handler(virq, &s3c_irq_eint0t4,
                                                 handle_edge_irq);
                break;
        case S3C_IRQTYPE_EDGE:
                if (parent_intc || intc->reg_pending == S3C2416_SRCPND2)
                        irq_set_chip_and_handler(virq, &s3c_irq_level_chip,
                                                 handle_edge_irq);
                else
                        irq_set_chip_and_handler(virq, &s3c_irq_chip,
                                                 handle_edge_irq);
                break;
        case S3C_IRQTYPE_LEVEL:
                if (parent_intc)
                        irq_set_chip_and_handler(virq, &s3c_irq_level_chip,
                                                 handle_level_irq);
                else
                        irq_set_chip_and_handler(virq, &s3c_irq_chip,
                                                 handle_level_irq);
                break;
        default:
                pr_err("irq-s3c24xx: unsupported irqtype %d\n", irq_data->type);
                return -EINVAL;
        }

        irq_set_chip_data(virq, irq_data);

        set_irq_flags(virq, IRQF_VALID);

        if (parent_intc && irq_data->type != S3C_IRQTYPE_NONE) {
                if (irq_data->parent_irq > 31) {
                        pr_err("irq-s3c24xx: parent irq %lu is out of range\n",
                               irq_data->parent_irq);
                        goto err;
                }

                parent_irq_data = &parent_intc->irqs[irq_data->parent_irq];
                parent_irq_data->sub_intc = intc;
                parent_irq_data->sub_bits |= (1UL << hw);

                /* attach the demuxer to the parent irq */
                irqno = irq_find_mapping(parent_intc->domain,
                                         irq_data->parent_irq);
                if (!irqno) {
                        pr_err("irq-s3c24xx: could not find mapping for parent irq %lu\n",
                               irq_data->parent_irq);
                        goto err;
                }
                irq_set_chained_handler(irqno, s3c_irq_demux);
        }

        return 0;

err:
        set_irq_flags(virq, 0);

        /* the only error can result from bad mapping data*/
        return -EINVAL;
}

static struct irq_domain_ops s3c24xx_irq_ops = {
        .map = s3c24xx_irq_map,
        .xlate = irq_domain_xlate_twocell,
};

static void s3c24xx_clear_intc(struct s3c_irq_intc *intc)
{
        void __iomem *reg_source;
        unsigned long pend;
        unsigned long last;
        int i;

        /* if intpnd is set, read the next pending irq from there */
        reg_source = intc->reg_intpnd ? intc->reg_intpnd : intc->reg_pending;

        last = 0;
        for (i = 0; i < 4; i++) {
                pend = __raw_readl(reg_source);

                if (pend == 0 || pend == last)
                        break;

                __raw_writel(pend, intc->reg_pending);
                if (intc->reg_intpnd)
                        __raw_writel(pend, intc->reg_intpnd);

                pr_info("irq: clearing pending status %08x\n", (int)pend);
                last = pend;
        }
}

static struct s3c_irq_intc * __init s3c24xx_init_intc(struct device_node *np,
                                       struct s3c_irq_data *irq_data,
                                       struct s3c_irq_intc *parent,
                                       unsigned long address)
{
        struct s3c_irq_intc *intc;
        void __iomem *base = (void *)0xf6000000; /* static mapping */
        int irq_num;
        int irq_start;
        int ret;

        intc = kzalloc(sizeof(struct s3c_irq_intc), GFP_KERNEL);
        if (!intc)
                return ERR_PTR(-ENOMEM);

        intc->irqs = irq_data;

        if (parent)
                intc->parent = parent;

        /* select the correct data for the controller.
         * Need to hard code the irq num start and offset
         * to preserve the static mapping for now
         */
        switch (address) {
        case 0x4a000000:
                pr_debug("irq: found main intc\n");
                intc->reg_pending = base;
                intc->reg_mask = base + 0x08;
                intc->reg_intpnd = base + 0x10;
                irq_num = 32;
                irq_start = S3C2410_IRQ(0);
                break;
        case 0x4a000018:
                pr_debug("irq: found subintc\n");
                intc->reg_pending = base + 0x18;
                intc->reg_mask = base + 0x1c;
                irq_num = 29;
                irq_start = S3C2410_IRQSUB(0);
                break;
        case 0x4a000040:
                pr_debug("irq: found intc2\n");
                intc->reg_pending = base + 0x40;
                intc->reg_mask = base + 0x48;
                intc->reg_intpnd = base + 0x50;
                irq_num = 8;
                irq_start = S3C2416_IRQ(0);
                break;
        case 0x560000a4:
                pr_debug("irq: found eintc\n");
                base = (void *)0xfd000000;

                intc->reg_mask = base + 0xa4;
                intc->reg_pending = base + 0xa8;
                irq_num = 24;
                irq_start = S3C2410_IRQ(32);
                break;
        default:
                pr_err("irq: unsupported controller address\n");
                ret = -EINVAL;
                goto err;
        }

        /* now that all the data is complete, init the irq-domain */
        s3c24xx_clear_intc(intc);
        intc->domain = irq_domain_add_legacy(np, irq_num, irq_start,
                                             0, &s3c24xx_irq_ops,
                                             intc);
        if (!intc->domain) {
                pr_err("irq: could not create irq-domain\n");
                ret = -EINVAL;
                goto err;
        }

        set_handle_irq(s3c24xx_handle_irq);

        return intc;

err:
        kfree(intc);
        return ERR_PTR(ret);
}

static struct s3c_irq_data init_eint[32] = {
        { .type = S3C_IRQTYPE_NONE, }, /* reserved */
        { .type = S3C_IRQTYPE_NONE, }, /* reserved */
        { .type = S3C_IRQTYPE_NONE, }, /* reserved */
        { .type = S3C_IRQTYPE_NONE, }, /* reserved */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT4 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT5 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT6 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT7 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT8 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT9 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT10 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT11 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT12 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT13 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT14 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT15 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT16 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT17 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT18 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT19 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT20 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT21 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT22 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT23 */
};

#ifdef CONFIG_CPU_S3C2410
static struct s3c_irq_data init_s3c2410base[32] = {
        { .type = S3C_IRQTYPE_EINT, }, /* EINT0 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT1 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT2 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT3 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT4to7 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT8to23 */
        { .type = S3C_IRQTYPE_NONE, }, /* reserved */
        { .type = S3C_IRQTYPE_EDGE, }, /* nBATT_FLT */
        { .type = S3C_IRQTYPE_EDGE, }, /* TICK */
        { .type = S3C_IRQTYPE_EDGE, }, /* WDT */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER3 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER4 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* LCD */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA3 */
        { .type = S3C_IRQTYPE_EDGE, }, /* SDI */
        { .type = S3C_IRQTYPE_EDGE, }, /* SPI0 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART1 */
        { .type = S3C_IRQTYPE_NONE, }, /* reserved */
        { .type = S3C_IRQTYPE_EDGE, }, /* USBD */
        { .type = S3C_IRQTYPE_EDGE, }, /* USBH */
        { .type = S3C_IRQTYPE_EDGE, }, /* IIC */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* SPI1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* RTC */
        { .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */
};

static struct s3c_irq_data init_s3c2410subint[32] = {
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */
        { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */
        { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */
};

void __init s3c2410_init_irq(void)
{
#ifdef CONFIG_FIQ
        init_FIQ(FIQ_START);
#endif

        s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2410base[0], NULL,
                                        0x4a000000);
        if (IS_ERR(s3c_intc[0])) {
                pr_err("irq: could not create main interrupt controller\n");
                return;
        }

        s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2410subint[0],
                                        s3c_intc[0], 0x4a000018);
        s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4);
}
#endif

#ifdef CONFIG_CPU_S3C2412
static struct s3c_irq_data init_s3c2412base[32] = {
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT0 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT1 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT2 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT3 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT4to7 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT8to23 */
        { .type = S3C_IRQTYPE_NONE, }, /* reserved */
        { .type = S3C_IRQTYPE_EDGE, }, /* nBATT_FLT */
        { .type = S3C_IRQTYPE_EDGE, }, /* TICK */
        { .type = S3C_IRQTYPE_EDGE, }, /* WDT */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER3 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER4 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* LCD */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA3 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* SDI/CF */
        { .type = S3C_IRQTYPE_EDGE, }, /* SPI0 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART1 */
        { .type = S3C_IRQTYPE_NONE, }, /* reserved */
        { .type = S3C_IRQTYPE_EDGE, }, /* USBD */
        { .type = S3C_IRQTYPE_EDGE, }, /* USBH */
        { .type = S3C_IRQTYPE_EDGE, }, /* IIC */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* SPI1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* RTC */
        { .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */
};

static struct s3c_irq_data init_s3c2412eint[32] = {
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 0 }, /* EINT0 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 1 }, /* EINT1 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 2 }, /* EINT2 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 3 }, /* EINT3 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT4 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT5 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT6 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 4 }, /* EINT7 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT8 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT9 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT10 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT11 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT12 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT13 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT14 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT15 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT16 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT17 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT18 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT19 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT20 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT21 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT22 */
        { .type = S3C_IRQTYPE_EINT, .parent_irq = 5 }, /* EINT23 */
};

static struct s3c_irq_data init_s3c2412subint[32] = {
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */
        { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */
        { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */
        { .type = S3C_IRQTYPE_NONE, },
        { .type = S3C_IRQTYPE_NONE, },
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 21 }, /* SDI */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 21 }, /* CF */
};

void __init s3c2412_init_irq(void)
{
        pr_info("S3C2412: IRQ Support\n");

#ifdef CONFIG_FIQ
        init_FIQ(FIQ_START);
#endif

        s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2412base[0], NULL,
                                        0x4a000000);
        if (IS_ERR(s3c_intc[0])) {
                pr_err("irq: could not create main interrupt controller\n");
                return;
        }

        s3c24xx_init_intc(NULL, &init_s3c2412eint[0], s3c_intc[0], 0x560000a4);
        s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2412subint[0],
                                        s3c_intc[0], 0x4a000018);
}
#endif

#ifdef CONFIG_CPU_S3C2416
static struct s3c_irq_data init_s3c2416base[32] = {
        { .type = S3C_IRQTYPE_EINT, }, /* EINT0 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT1 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT2 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT3 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT4to7 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT8to23 */
        { .type = S3C_IRQTYPE_NONE, }, /* reserved */
        { .type = S3C_IRQTYPE_EDGE, }, /* nBATT_FLT */
        { .type = S3C_IRQTYPE_EDGE, }, /* TICK */
        { .type = S3C_IRQTYPE_LEVEL, }, /* WDT/AC97 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER3 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER4 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART2 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* LCD */
        { .type = S3C_IRQTYPE_LEVEL, }, /* DMA */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART3 */
        { .type = S3C_IRQTYPE_NONE, }, /* reserved */
        { .type = S3C_IRQTYPE_EDGE, }, /* SDI1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* SDI0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* SPI0 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* NAND */
        { .type = S3C_IRQTYPE_EDGE, }, /* USBD */
        { .type = S3C_IRQTYPE_EDGE, }, /* USBH */
        { .type = S3C_IRQTYPE_EDGE, }, /* IIC */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART0 */
        { .type = S3C_IRQTYPE_NONE, },
        { .type = S3C_IRQTYPE_EDGE, }, /* RTC */
        { .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */
};

static struct s3c_irq_data init_s3c2416subint[32] = {
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */
        { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */
        { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */
        { .type = S3C_IRQTYPE_NONE }, /* reserved */
        { .type = S3C_IRQTYPE_NONE }, /* reserved */
        { .type = S3C_IRQTYPE_NONE }, /* reserved */
        { .type = S3C_IRQTYPE_NONE }, /* reserved */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD2 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD3 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD4 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA0 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA1 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA2 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA3 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA4 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA5 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 18 }, /* UART3-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 18 }, /* UART3-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 18 }, /* UART3-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* WDT */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* AC97 */
};

static struct s3c_irq_data init_s3c2416_second[32] = {
        { .type = S3C_IRQTYPE_EDGE }, /* 2D */
        { .type = S3C_IRQTYPE_NONE }, /* reserved */
        { .type = S3C_IRQTYPE_NONE }, /* reserved */
        { .type = S3C_IRQTYPE_NONE }, /* reserved */
        { .type = S3C_IRQTYPE_EDGE }, /* PCM0 */
        { .type = S3C_IRQTYPE_NONE }, /* reserved */
        { .type = S3C_IRQTYPE_EDGE }, /* I2S0 */
};

void __init s3c2416_init_irq(void)
{
        pr_info("S3C2416: IRQ Support\n");

#ifdef CONFIG_FIQ
        init_FIQ(FIQ_START);
#endif

        s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2416base[0], NULL,
                                        0x4a000000);
        if (IS_ERR(s3c_intc[0])) {
                pr_err("irq: could not create main interrupt controller\n");
                return;
        }

        s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4);
        s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2416subint[0],
                                        s3c_intc[0], 0x4a000018);

        s3c_intc[2] = s3c24xx_init_intc(NULL, &init_s3c2416_second[0],
                                        NULL, 0x4a000040);
}

#endif

#ifdef CONFIG_CPU_S3C2440
static struct s3c_irq_data init_s3c2440base[32] = {
        { .type = S3C_IRQTYPE_EINT, }, /* EINT0 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT1 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT2 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT3 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT4to7 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT8to23 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* CAM */
        { .type = S3C_IRQTYPE_EDGE, }, /* nBATT_FLT */
        { .type = S3C_IRQTYPE_EDGE, }, /* TICK */
        { .type = S3C_IRQTYPE_LEVEL, }, /* WDT/AC97 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER3 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER4 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* LCD */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA3 */
        { .type = S3C_IRQTYPE_EDGE, }, /* SDI */
        { .type = S3C_IRQTYPE_EDGE, }, /* SPI0 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART1 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* NFCON */
        { .type = S3C_IRQTYPE_EDGE, }, /* USBD */
        { .type = S3C_IRQTYPE_EDGE, }, /* USBH */
        { .type = S3C_IRQTYPE_EDGE, }, /* IIC */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* SPI1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* RTC */
        { .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */
};

static struct s3c_irq_data init_s3c2440subint[32] = {
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */
        { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */
        { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_C */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_P */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* WDT */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* AC97 */
};

void __init s3c2440_init_irq(void)
{
        pr_info("S3C2440: IRQ Support\n");

#ifdef CONFIG_FIQ
        init_FIQ(FIQ_START);
#endif

        s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2440base[0], NULL,
                                        0x4a000000);
        if (IS_ERR(s3c_intc[0])) {
                pr_err("irq: could not create main interrupt controller\n");
                return;
        }

        s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4);
        s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2440subint[0],
                                        s3c_intc[0], 0x4a000018);
}
#endif

#ifdef CONFIG_CPU_S3C2442
static struct s3c_irq_data init_s3c2442base[32] = {
        { .type = S3C_IRQTYPE_EINT, }, /* EINT0 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT1 */

        { .type = S3C_IRQTYPE_EINT, }, /* EINT2 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT3 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT4to7 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT8to23 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* CAM */
        { .type = S3C_IRQTYPE_EDGE, }, /* nBATT_FLT */
        { .type = S3C_IRQTYPE_EDGE, }, /* TICK */
        { .type = S3C_IRQTYPE_EDGE, }, /* WDT */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER3 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER4 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* LCD */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* DMA3 */
        { .type = S3C_IRQTYPE_EDGE, }, /* SDI */
        { .type = S3C_IRQTYPE_EDGE, }, /* SPI0 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART1 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* NFCON */
        { .type = S3C_IRQTYPE_EDGE, }, /* USBD */
        { .type = S3C_IRQTYPE_EDGE, }, /* USBH */
        { .type = S3C_IRQTYPE_EDGE, }, /* IIC */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* SPI1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* RTC */
        { .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */
};

static struct s3c_irq_data init_s3c2442subint[32] = {
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */
        { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */
        { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_C */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_P */
};

void __init s3c2442_init_irq(void)
{
        pr_info("S3C2442: IRQ Support\n");

#ifdef CONFIG_FIQ
        init_FIQ(FIQ_START);
#endif

        s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2442base[0], NULL,
                                        0x4a000000);
        if (IS_ERR(s3c_intc[0])) {
                pr_err("irq: could not create main interrupt controller\n");
                return;
        }

        s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4);
        s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2442subint[0],
                                        s3c_intc[0], 0x4a000018);
}
#endif

#ifdef CONFIG_CPU_S3C2443
static struct s3c_irq_data init_s3c2443base[32] = {
        { .type = S3C_IRQTYPE_EINT, }, /* EINT0 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT1 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT2 */
        { .type = S3C_IRQTYPE_EINT, }, /* EINT3 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT4to7 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* EINT8to23 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* CAM */
        { .type = S3C_IRQTYPE_EDGE, }, /* nBATT_FLT */
        { .type = S3C_IRQTYPE_EDGE, }, /* TICK */
        { .type = S3C_IRQTYPE_LEVEL, }, /* WDT/AC97 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER2 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER3 */
        { .type = S3C_IRQTYPE_EDGE, }, /* TIMER4 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART2 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* LCD */
        { .type = S3C_IRQTYPE_LEVEL, }, /* DMA */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART3 */
        { .type = S3C_IRQTYPE_EDGE, }, /* CFON */
        { .type = S3C_IRQTYPE_EDGE, }, /* SDI1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* SDI0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* SPI0 */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* NAND */
        { .type = S3C_IRQTYPE_EDGE, }, /* USBD */
        { .type = S3C_IRQTYPE_EDGE, }, /* USBH */
        { .type = S3C_IRQTYPE_EDGE, }, /* IIC */
        { .type = S3C_IRQTYPE_LEVEL, }, /* UART0 */
        { .type = S3C_IRQTYPE_EDGE, }, /* SPI1 */
        { .type = S3C_IRQTYPE_EDGE, }, /* RTC */
        { .type = S3C_IRQTYPE_LEVEL, }, /* ADCPARENT */
};


static struct s3c_irq_data init_s3c2443subint[32] = {
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 28 }, /* UART0-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 23 }, /* UART1-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 15 }, /* UART2-ERR */
        { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* TC */
        { .type = S3C_IRQTYPE_EDGE, .parent_irq = 31 }, /* ADC */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_C */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 6 }, /* CAM_P */
        { .type = S3C_IRQTYPE_NONE }, /* reserved */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD1 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD2 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD3 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 16 }, /* LCD4 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA0 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA1 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA2 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA3 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA4 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 17 }, /* DMA5 */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 18 }, /* UART3-RX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 18 }, /* UART3-TX */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 18 }, /* UART3-ERR */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* WDT */
        { .type = S3C_IRQTYPE_LEVEL, .parent_irq = 9 }, /* AC97 */
};

void __init s3c2443_init_irq(void)
{
        pr_info("S3C2443: IRQ Support\n");

#ifdef CONFIG_FIQ
        init_FIQ(FIQ_START);
#endif

        s3c_intc[0] = s3c24xx_init_intc(NULL, &init_s3c2443base[0], NULL,
                                        0x4a000000);
        if (IS_ERR(s3c_intc[0])) {
                pr_err("irq: could not create main interrupt controller\n");
                return;
        }

        s3c24xx_init_intc(NULL, &init_eint[0], s3c_intc[0], 0x560000a4);
        s3c_intc[1] = s3c24xx_init_intc(NULL, &init_s3c2443subint[0],
                                        s3c_intc[0], 0x4a000018);
}
#endif

#ifdef CONFIG_OF
static int s3c24xx_irq_map_of(struct irq_domain *h, unsigned int virq,
                                                        irq_hw_number_t hw)
{
        unsigned int ctrl_num = hw / 32;
        unsigned int intc_hw = hw % 32;
        struct s3c_irq_intc *intc = s3c_intc[ctrl_num];
        struct s3c_irq_intc *parent_intc = intc->parent;
        struct s3c_irq_data *irq_data = &intc->irqs[intc_hw];

        /* attach controller pointer to irq_data */
        irq_data->intc = intc;
        irq_data->offset = intc_hw;

        if (!parent_intc)
                irq_set_chip_and_handler(virq, &s3c_irq_chip, handle_edge_irq);
        else
                irq_set_chip_and_handler(virq, &s3c_irq_level_chip,
                                         handle_edge_irq);

        irq_set_chip_data(virq, irq_data);

        set_irq_flags(virq, IRQF_VALID);

        return 0;
}

/* Translate our of irq notation
 * format: <ctrl_num ctrl_irq parent_irq type>
 */
static int s3c24xx_irq_xlate_of(struct irq_domain *d, struct device_node *n,
                        const u32 *intspec, unsigned int intsize,
                        irq_hw_number_t *out_hwirq, unsigned int *out_type)
{
        struct s3c_irq_intc *intc;
        struct s3c_irq_intc *parent_intc;
        struct s3c_irq_data *irq_data;
        struct s3c_irq_data *parent_irq_data;
        int irqno;

        if (WARN_ON(intsize < 4))
                return -EINVAL;

        if (intspec[0] > 2 || !s3c_intc[intspec[0]]) {
                pr_err("controller number %d invalid\n", intspec[0]);
                return -EINVAL;
        }
        intc = s3c_intc[intspec[0]];

        *out_hwirq = intspec[0] * 32 + intspec[2];
        *out_type = intspec[3] & IRQ_TYPE_SENSE_MASK;

        parent_intc = intc->parent;
        if (parent_intc) {
                irq_data = &intc->irqs[intspec[2]];
                irq_data->parent_irq = intspec[1];
                parent_irq_data = &parent_intc->irqs[irq_data->parent_irq];
                parent_irq_data->sub_intc = intc;
                parent_irq_data->sub_bits |= (1UL << intspec[2]);

                /* parent_intc is always s3c_intc[0], so no offset */
                irqno = irq_create_mapping(parent_intc->domain, intspec[1]);
                if (irqno < 0) {
                        pr_err("irq: could not map parent interrupt\n");
                        return irqno;
                }

                irq_set_chained_handler(irqno, s3c_irq_demux);
        }

        return 0;
}

static struct irq_domain_ops s3c24xx_irq_ops_of = {
        .map = s3c24xx_irq_map_of,
        .xlate = s3c24xx_irq_xlate_of,
};

struct s3c24xx_irq_of_ctrl {
        char                    *name;
        unsigned long           offset;
        struct s3c_irq_intc     **handle;
        struct s3c_irq_intc     **parent;
        struct irq_domain_ops   *ops;
};

static int __init s3c_init_intc_of(struct device_node *np,
                        struct device_node *interrupt_parent,
                        struct s3c24xx_irq_of_ctrl *s3c_ctrl, int num_ctrl)
{
        struct s3c_irq_intc *intc;
        struct s3c24xx_irq_of_ctrl *ctrl;
        struct irq_domain *domain;
        void __iomem *reg_base;
        int i;

        reg_base = of_iomap(np, 0);
        if (!reg_base) {
                pr_err("irq-s3c24xx: could not map irq registers\n");
                return -EINVAL;
        }

        domain = irq_domain_add_linear(np, num_ctrl * 32,
                                                     &s3c24xx_irq_ops_of, NULL);
        if (!domain) {
                pr_err("irq: could not create irq-domain\n");
                return -EINVAL;
        }

        for (i = 0; i < num_ctrl; i++) {
                ctrl = &s3c_ctrl[i];

                pr_debug("irq: found controller %s\n", ctrl->name);

                intc = kzalloc(sizeof(struct s3c_irq_intc), GFP_KERNEL);
                if (!intc)
                        return -ENOMEM;

                intc->domain = domain;
                intc->irqs = kzalloc(sizeof(struct s3c_irq_data) * 32,
                                     GFP_KERNEL);
                if (!intc->irqs) {
                        kfree(intc);
                        return -ENOMEM;
                }

                if (ctrl->parent) {
                        intc->reg_pending = reg_base + ctrl->offset;
                        intc->reg_mask = reg_base + ctrl->offset + 0x4;

                        if (*(ctrl->parent)) {
                                intc->parent = *(ctrl->parent);
                        } else {
                                pr_warn("irq: parent of %s missing\n",
                                        ctrl->name);
                                kfree(intc->irqs);
                                kfree(intc);
                                continue;
                        }
                } else {
                        intc->reg_pending = reg_base + ctrl->offset;
                        intc->reg_mask = reg_base + ctrl->offset + 0x08;
                        intc->reg_intpnd = reg_base + ctrl->offset + 0x10;
                }

                s3c24xx_clear_intc(intc);
                s3c_intc[i] = intc;
        }

        set_handle_irq(s3c24xx_handle_irq);

        return 0;
}

static struct s3c24xx_irq_of_ctrl s3c2410_ctrl[] = {
        {
                .name = "intc",
                .offset = 0,
        }, {
                .name = "subintc",
                .offset = 0x18,
                .parent = &s3c_intc[0],
        }
};

int __init s3c2410_init_intc_of(struct device_node *np,
                        struct device_node *interrupt_parent,
                        struct s3c24xx_irq_of_ctrl *ctrl, int num_ctrl)
{
        return s3c_init_intc_of(np, interrupt_parent,
                                s3c2410_ctrl, ARRAY_SIZE(s3c2410_ctrl));
}
IRQCHIP_DECLARE(s3c2410_irq, "samsung,s3c2410-irq", s3c2410_init_intc_of);

static struct s3c24xx_irq_of_ctrl s3c2416_ctrl[] = {
        {
                .name = "intc",
                .offset = 0,
        }, {
                .name = "subintc",
                .offset = 0x18,
                .parent = &s3c_intc[0],
        }, {
                .name = "intc2",
                .offset = 0x40,
        }
};

int __init s3c2416_init_intc_of(struct device_node *np,
                        struct device_node *interrupt_parent,
                        struct s3c24xx_irq_of_ctrl *ctrl, int num_ctrl)
{
        return s3c_init_intc_of(np, interrupt_parent,
                                s3c2416_ctrl, ARRAY_SIZE(s3c2416_ctrl));
}
IRQCHIP_DECLARE(s3c2416_irq, "samsung,s3c2416-irq", s3c2416_init_intc_of);
#endif