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/*
*
* Copyright (C) 1999 ARM Limited
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/stddef.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <mach/csp/intcHw_reg.h>
#include <mach/csp/mm_io.h>
static void bcmring_mask_irq0(struct irq_data *d)
{
writel(1 << (d->irq - IRQ_INTC0_START),
MM_IO_BASE_INTC0 + INTCHW_INTENCLEAR);
}
static void bcmring_unmask_irq0(struct irq_data *d)
{
writel(1 << (d->irq - IRQ_INTC0_START),
MM_IO_BASE_INTC0 + INTCHW_INTENABLE);
}
static void bcmring_mask_irq1(struct irq_data *d)
{
writel(1 << (d->irq - IRQ_INTC1_START),
MM_IO_BASE_INTC1 + INTCHW_INTENCLEAR);
}
static void bcmring_unmask_irq1(struct irq_data *d)
{
writel(1 << (d->irq - IRQ_INTC1_START),
MM_IO_BASE_INTC1 + INTCHW_INTENABLE);
}
static void bcmring_mask_irq2(struct irq_data *d)
{
writel(1 << (d->irq - IRQ_SINTC_START),
MM_IO_BASE_SINTC + INTCHW_INTENCLEAR);
}
static void bcmring_unmask_irq2(struct irq_data *d)
{
writel(1 << (d->irq - IRQ_SINTC_START),
MM_IO_BASE_SINTC + INTCHW_INTENABLE);
}
static struct irq_chip bcmring_irq0_chip = {
.name = "ARM-INTC0",
.irq_ack = bcmring_mask_irq0,
.irq_mask = bcmring_mask_irq0, /* mask a specific interrupt, blocking its delivery. */
.irq_unmask = bcmring_unmask_irq0, /* unmaks an interrupt */
};
static struct irq_chip bcmring_irq1_chip = {
.name = "ARM-INTC1",
.irq_ack = bcmring_mask_irq1,
.irq_mask = bcmring_mask_irq1,
.irq_unmask = bcmring_unmask_irq1,
};
static struct irq_chip bcmring_irq2_chip = {
.name = "ARM-SINTC",
.irq_ack = bcmring_mask_irq2,
.irq_mask = bcmring_mask_irq2,
.irq_unmask = bcmring_unmask_irq2,
};
static void vic_init(void __iomem *base, struct irq_chip *chip,
unsigned int irq_start, unsigned int vic_sources)
{
unsigned int i;
for (i = 0; i < 32; i++) {
unsigned int irq = irq_start + i;
irq_set_chip(irq, chip);
irq_set_chip_data(irq, base);
if (vic_sources & (1 << i)) {
irq_set_handler(irq, handle_level_irq);
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
}
}
writel(0, base + INTCHW_INTSELECT);
writel(0, base + INTCHW_INTENABLE);
writel(~0, base + INTCHW_INTENCLEAR);
writel(0, base + INTCHW_IRQSTATUS);
writel(~0, base + INTCHW_SOFTINTCLEAR);
}
void __init bcmring_init_irq(void)
{
vic_init((void __iomem *)MM_IO_BASE_INTC0, &bcmring_irq0_chip,
IRQ_INTC0_START, IRQ_INTC0_VALID_MASK);
vic_init((void __iomem *)MM_IO_BASE_INTC1, &bcmring_irq1_chip,
IRQ_INTC1_START, IRQ_INTC1_VALID_MASK);
vic_init((void __iomem *)MM_IO_BASE_SINTC, &bcmring_irq2_chip,
IRQ_SINTC_START, IRQ_SINTC_VALID_MASK);
/* special cases */
if (INTCHW_INTC1_GPIO0 & IRQ_INTC1_VALID_MASK) {
irq_set_handler(IRQ_GPIO0, handle_simple_irq);
}
if (INTCHW_INTC1_GPIO1 & IRQ_INTC1_VALID_MASK) {
irq_set_handler(IRQ_GPIO1, handle_simple_irq);
}
}
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