59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
|
/*
|
||
|
|
* arch/arm/mach-kirkwood/irq.c
|
||
|
|
*
|
||
|
|
* Kirkwood IRQ handling.
|
||
|
|
*
|
||
|
|
* This file is licensed under the terms of the GNU General Public
|
||
|
|
* License version 2. This program is licensed "as is" without any
|
||
|
|
* warranty of any kind, whether express or implied.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/irq.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include <mach/bridge-regs.h>
|
||
|
|
#include <plat/irq.h>
|
||
|
|
#include <asm/gpio.h>
|
||
|
|
#include "common.h"
|
||
|
|
|
||
|
|
static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
|
||
|
|
{
|
||
|
|
BUG_ON(irq < IRQ_KIRKWOOD_GPIO_LOW_0_7);
|
||
|
|
BUG_ON(irq > IRQ_KIRKWOOD_GPIO_HIGH_16_23);
|
||
|
|
|
||
|
|
orion_gpio_irq_handler((irq - IRQ_KIRKWOOD_GPIO_LOW_0_7) << 3);
|
||
|
|
}
|
||
|
|
|
||
|
|
void __init kirkwood_init_irq(void)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
orion_irq_init(0, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF));
|
||
|
|
orion_irq_init(32, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF));
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Mask and clear GPIO IRQ interrupts.
|
||
|
|
*/
|
||
|
|
writel(0, GPIO_LEVEL_MASK(0));
|
||
|
|
writel(0, GPIO_EDGE_MASK(0));
|
||
|
|
writel(0, GPIO_EDGE_CAUSE(0));
|
||
|
|
writel(0, GPIO_LEVEL_MASK(32));
|
||
|
|
writel(0, GPIO_EDGE_MASK(32));
|
||
|
|
writel(0, GPIO_EDGE_CAUSE(32));
|
||
|
|
|
||
|
|
for (i = IRQ_KIRKWOOD_GPIO_START; i < NR_IRQS; i++) {
|
||
|
|
set_irq_chip(i, &orion_gpio_irq_chip);
|
||
|
|
set_irq_handler(i, handle_level_irq);
|
||
|
|
irq_desc[i].status |= IRQ_LEVEL;
|
||
|
|
set_irq_flags(i, IRQF_VALID);
|
||
|
|
}
|
||
|
|
set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_0_7, gpio_irq_handler);
|
||
|
|
set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_8_15, gpio_irq_handler);
|
||
|
|
set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_16_23, gpio_irq_handler);
|
||
|
|
set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_24_31, gpio_irq_handler);
|
||
|
|
set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_0_7, gpio_irq_handler);
|
||
|
|
set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_8_15, gpio_irq_handler);
|
||
|
|
set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_16_23, gpio_irq_handler);
|
||
|
|
}
|