bonito-irq.c

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/*
 * Copyright 2001 MontaVista Software Inc.
 * Author: Jun Sun, [email protected] or [email protected]
 * Copyright (C) 2000, 2001 Ralf Baechle ([email protected])
 *
 * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
 * Author: Fuxin Zhang, [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.
 */
#include <linux/interrupt.h>
#include <linux/compiler.h>

#include <loongson.h>

static inline void bonito_irq_enable(struct irq_data *d)
{
    LOONGSON_INTENSET = (1 << (d->irq - LOONGSON_IRQ_BASE));
    mmiowb();
}

static inline void bonito_irq_disable(struct irq_data *d)
{
    LOONGSON_INTENCLR = (1 << (d->irq - LOONGSON_IRQ_BASE));
    mmiowb();
}

static struct irq_chip bonito_irq_type = {
    .name       = "bonito_irq",
    .irq_mask   = bonito_irq_disable,
    .irq_unmask = bonito_irq_enable,
};

static struct irqaction __maybe_unused dma_timeout_irqaction = {
    .handler    = no_action,
    .name       = "dma_timeout",
};

void bonito_irq_init(void)
{
    u32 i;

    for (i = LOONGSON_IRQ_BASE; i < LOONGSON_IRQ_BASE + 32; i++)
        irq_set_chip_and_handler(i, &bonito_irq_type,
                     handle_level_irq);

#ifdef CONFIG_CPU_LOONGSON2E
    setup_irq(LOONGSON_IRQ_BASE + 10, &dma_timeout_irqaction);
#endif
}