mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-24 20:53:07 +02:00
f2053cb231
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27399 3c298f89-4303-0410-b956-a3cf2f4a3e73
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/*
|
|
* Ralink SoC Interrupt controller routines
|
|
*
|
|
* Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
|
|
*
|
|
* 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/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/bitops.h>
|
|
|
|
#include <asm/irq_cpu.h>
|
|
#include <asm/mipsregs.h>
|
|
|
|
#include <asm/mach-ralink/common.h>
|
|
|
|
/* INTC register offsets */
|
|
#define INTC_REG_STATUS0 0x00
|
|
#define INTC_REG_STATUS1 0x04
|
|
#define INTC_REG_TYPE 0x20
|
|
#define INTC_REG_RAW_STATUS 0x30
|
|
#define INTC_REG_ENABLE 0x34
|
|
#define INTC_REG_DISABLE 0x38
|
|
|
|
#define INTC_INT_GLOBAL BIT(31)
|
|
#define INTC_IRQ_COUNT 32
|
|
|
|
static unsigned int ramips_intc_irq_base;
|
|
static void __iomem *ramips_intc_base;
|
|
|
|
static inline void ramips_intc_wr(u32 val, unsigned reg)
|
|
{
|
|
__raw_writel(val, ramips_intc_base + reg);
|
|
}
|
|
|
|
static inline u32 ramips_intc_rr(unsigned reg)
|
|
{
|
|
return __raw_readl(ramips_intc_base + reg);
|
|
}
|
|
|
|
static void ramips_intc_irq_unmask(struct irq_data *d)
|
|
{
|
|
unsigned int irq = d->irq - ramips_intc_irq_base;
|
|
|
|
ramips_intc_wr((1 << irq), INTC_REG_ENABLE);
|
|
}
|
|
|
|
static void ramips_intc_irq_mask(struct irq_data *d)
|
|
{
|
|
unsigned int irq = d->irq - ramips_intc_irq_base;
|
|
|
|
ramips_intc_wr((1 << irq), INTC_REG_DISABLE);
|
|
}
|
|
|
|
static struct irq_chip ramips_intc_irq_chip = {
|
|
.name = "INTC",
|
|
.irq_unmask = ramips_intc_irq_unmask,
|
|
.irq_mask = ramips_intc_irq_mask,
|
|
.irq_mask_ack = ramips_intc_irq_mask,
|
|
};
|
|
|
|
static struct irqaction ramips_intc_irqaction = {
|
|
.handler = no_action,
|
|
.name = "cascade [INTC]",
|
|
};
|
|
|
|
void __init ramips_intc_irq_init(unsigned intc_base, unsigned irq,
|
|
unsigned irq_base)
|
|
{
|
|
int i;
|
|
|
|
ramips_intc_base = ioremap_nocache(intc_base, PAGE_SIZE);
|
|
ramips_intc_irq_base = irq_base;
|
|
|
|
/* disable all interrupts */
|
|
ramips_intc_wr(~0, INTC_REG_DISABLE);
|
|
|
|
/* route all INTC interrupts to MIPS HW0 interrupt */
|
|
ramips_intc_wr(0, INTC_REG_TYPE);
|
|
|
|
for (i = ramips_intc_irq_base;
|
|
i < ramips_intc_irq_base + INTC_IRQ_COUNT; i++)
|
|
irq_set_chip_and_handler(i, &ramips_intc_irq_chip,
|
|
handle_level_irq);
|
|
|
|
setup_irq(irq, &ramips_intc_irqaction);
|
|
ramips_intc_wr(INTC_INT_GLOBAL, INTC_REG_ENABLE);
|
|
}
|
|
|
|
u32 ramips_intc_get_status(void)
|
|
{
|
|
return ramips_intc_rr(INTC_REG_STATUS0);
|
|
}
|