/*
 * Copyright (C) 2012 Thomas Petazzoni
 *
 * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2.  This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#ifndef _LINUX_IRQCHIP_H
#define _LINUX_IRQCHIP_H

#include <linux/acpi.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>

typedef int (*platform_irq_probe_t)(struct platform_device *, struct device_node *);

/* Undefined on purpose */
extern of_irq_init_cb_t typecheck_irq_init_cb;
extern platform_irq_probe_t typecheck_irq_probe;

#define typecheck_irq_init_cb(fn)                                       \
        (__typecheck(typecheck_irq_init_cb, &fn) ? fn : fn)

#define typecheck_irq_probe(fn)                                         \
        (__typecheck(typecheck_irq_probe, &fn) ? fn : fn)

/*
 * This macro must be used by the different irqchip drivers to declare
 * the association between their DT compatible string and their
 * initialization function.
 *
 * @name: name that must be unique across all IRQCHIP_DECLARE of the
 * same file.
 * @compat: compatible string of the irqchip driver
 * @fn: initialization function
 */
#define IRQCHIP_DECLARE(name, compat, fn)       \
        OF_DECLARE_2(irqchip, name, compat, typecheck_irq_init_cb(fn))

extern int platform_irqchip_probe(struct platform_device *pdev);

#define IRQCHIP_PLATFORM_DRIVER_BEGIN(drv_name) \
static const struct of_device_id drv_name##_irqchip_match_table[] = {

#define IRQCHIP_MATCH(compat, fn) { .compatible = compat,               \
                                    .data = typecheck_irq_probe(fn), },


#define IRQCHIP_PLATFORM_DRIVER_END(drv_name, ...)                      \
        {},                                                             \
};                                                                      \
MODULE_DEVICE_TABLE(of, drv_name##_irqchip_match_table);                \
static struct platform_driver drv_name##_driver = {                     \
        .probe  = IS_ENABLED(CONFIG_IRQCHIP) ?                          \
                        platform_irqchip_probe : NULL,                  \
        .driver = {                                                     \
                .name = #drv_name,                                      \
                .owner = THIS_MODULE,                                   \
                .of_match_table = drv_name##_irqchip_match_table,       \
                .suppress_bind_attrs = true,                            \
                __VA_ARGS__                                             \
        },                                                              \
};                                                                      \
builtin_platform_driver(drv_name##_driver)

/*
 * This macro must be used by the different irqchip drivers to declare
 * the association between their version and their initialization function.
 *
 * @name: name that must be unique across all IRQCHIP_ACPI_DECLARE of the
 * same file.
 * @subtable: Subtable to be identified in MADT
 * @validate: Function to be called on that subtable to check its validity.
 *            Can be NULL.
 * @data: data to be checked by the validate function.
 * @fn: initialization function
 */
#define IRQCHIP_ACPI_DECLARE(name, subtable, validate, data, fn)        \
        ACPI_DECLARE_SUBTABLE_PROBE_ENTRY(irqchip, name,                \
                                          ACPI_SIG_MADT, subtable,      \
                                          validate, data, fn)

#ifdef CONFIG_IRQCHIP
void irqchip_init(void);
#else
static inline void irqchip_init(void) {}
#endif

#endif