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/*

 *  linux/arch/arm/mach-anakin/irq.c

 *

 *  Copyright (C) 2001 Aleph One Ltd. for Acunia N.V.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 *  Changelog:

 *   10-Apr-2001 TTC    Created

 */

#include <linux/ptrace.h>

#include <linux/sched.h>

#include <linux/interrupt.h>

#include <linux/init.h>

#include <linux/list.h>

#include <linux/timer.h>

#include <asm/irq.h>

#include <asm/mach/irq.h>

extern unsigned int anakin_irq_mask, anakin_active_irqs;

extern void do_IRQ(int, struct pt_regs *);

static void

anakin_mask_irq(unsigned int irq)

{

        anakin_irq_mask &= ~(1 << irq);

}

static void

anakin_unmask_irq(unsigned int irq)

{

        anakin_irq_mask |= (1 << irq);

}

/*

 * This is a faked interrupt to deal with parallel interrupt requests

 * on the Anakin.  Make sure that its interrupt number is not in any

 * way conflicting with the hardware interrupt numbers!  Check

 * IRQ_ANAKIN in linux/include/asm-arm/arch-anakin/irqs.h.

 */

static void

anakin_interrupt(int irq, void *dev_id, struct pt_regs *regs)

{

        for (irq = 0; irq < NR_IRQS; irq++)

                if (anakin_active_irqs & (1 << irq))

                        do_IRQ(irq, regs);

}

static struct irqaction anakin_irq = {

        .name           = "Anakin IRQ",

        .handler        = anakin_interrupt,

        .flags          = SA_INTERRUPT,

};

void __init

irq_init_irq(void)

{

        unsigned int irq;

        for (irq = 0; irq < NR_IRQS; irq++) {

                switch (irq) {

                case IRQ_UART0:

                case IRQ_UART1:

                case IRQ_UART2:

                case IRQ_TICK:

                case IRQ_CODEC:

                case IRQ_UART4:

                case IRQ_TOUCHSCREEN:

                case IRQ_UART3:

                case IRQ_FIFO:

                case IRQ_CAN:

                case IRQ_COMPACTFLASH:

                case IRQ_BOSH:

                case IRQ_ANAKIN:

                        irq_desc[irq].valid = 1;

                        irq_desc[irq].mask_ack = anakin_mask_irq;

                        irq_desc[irq].mask = anakin_mask_irq;

                        irq_desc[irq].unmask = anakin_unmask_irq;

                }

        }

        setup_arm_irq(IRQ_ANAKIN, &anakin_irq);

}