irq.c
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/*
* arch/arm/mach-iop33x/irq.c
*
* Generic IOP331 IRQ handling functionality
*
* Author: Dave Jiang <dave.jiang@intel.com>
* Copyright (C) 2003 Intel Corp.
*
* 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.
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <asm/mach/irq.h>
#include <asm/irq.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
static u32 iop33x_mask0;
static u32 iop33x_mask1;
static void intctl0_write(u32 val)
{
asm volatile("mcr p6, 0, %0, c0, c0, 0" : : "r" (val));
}
static void intctl1_write(u32 val)
{
asm volatile("mcr p6, 0, %0, c1, c0, 0" : : "r" (val));
}
static void intstr0_write(u32 val)
{
asm volatile("mcr p6, 0, %0, c2, c0, 0" : : "r" (val));
}
static void intstr1_write(u32 val)
{
asm volatile("mcr p6, 0, %0, c3, c0, 0" : : "r" (val));
}
static void intbase_write(u32 val)
{
asm volatile("mcr p6, 0, %0, c12, c0, 0" : : "r" (val));
}
static void intsize_write(u32 val)
{
asm volatile("mcr p6, 0, %0, c13, c0, 0" : : "r" (val));
}
static void
iop33x_irq_mask1 (struct irq_data *d)
{
iop33x_mask0 &= ~(1 << d->irq);
intctl0_write(iop33x_mask0);
}
static void
iop33x_irq_mask2 (struct irq_data *d)
{
iop33x_mask1 &= ~(1 << (d->irq - 32));
intctl1_write(iop33x_mask1);
}
static void
iop33x_irq_unmask1(struct irq_data *d)
{
iop33x_mask0 |= 1 << d->irq;
intctl0_write(iop33x_mask0);
}
static void
iop33x_irq_unmask2(struct irq_data *d)
{
iop33x_mask1 |= (1 << (d->irq - 32));
intctl1_write(iop33x_mask1);
}
struct irq_chip iop33x_irqchip1 = {
.name = "IOP33x-1",
.irq_ack = iop33x_irq_mask1,
.irq_mask = iop33x_irq_mask1,
.irq_unmask = iop33x_irq_unmask1,
};
struct irq_chip iop33x_irqchip2 = {
.name = "IOP33x-2",
.irq_ack = iop33x_irq_mask2,
.irq_mask = iop33x_irq_mask2,
.irq_unmask = iop33x_irq_unmask2,
};
void __init iop33x_init_irq(void)
{
int i;
iop_init_cp6_handler();
intctl0_write(0);
intctl1_write(0);
intstr0_write(0);
intstr1_write(0);
intbase_write(0);
intsize_write(1);
if (machine_is_iq80331())
*IOP3XX_PCIIRSR = 0x0f;
for (i = 0; i < NR_IRQS; i++) {
irq_set_chip_and_handler(i,
(i < 32) ? &iop33x_irqchip1 : &iop33x_irqchip2,
handle_level_irq);
set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
}
}