62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
|
/*
|
||
|
|
* intc2.c -- support for the 2nd INTC controller of the 5249
|
||
|
|
*
|
||
|
|
* (C) Copyright 2009, Greg Ungerer <gerg@snapgear.com>
|
||
|
|
*
|
||
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
||
|
|
* License. See the file COPYING in the main directory of this archive
|
||
|
|
* for more details.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <linux/irq.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include <asm/coldfire.h>
|
||
|
|
#include <asm/mcfsim.h>
|
||
|
|
|
||
|
|
static void intc2_irq_gpio_mask(struct irq_data *d)
|
||
|
|
{
|
||
|
|
u32 imr;
|
||
|
|
imr = readl(MCFSIM2_GPIOINTENABLE);
|
||
|
|
imr &= ~(0x1 << (d->irq - MCF_IRQ_GPIO0));
|
||
|
|
writel(imr, MCFSIM2_GPIOINTENABLE);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void intc2_irq_gpio_unmask(struct irq_data *d)
|
||
|
|
{
|
||
|
|
u32 imr;
|
||
|
|
imr = readl(MCFSIM2_GPIOINTENABLE);
|
||
|
|
imr |= (0x1 << (d->irq - MCF_IRQ_GPIO0));
|
||
|
|
writel(imr, MCFSIM2_GPIOINTENABLE);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void intc2_irq_gpio_ack(struct irq_data *d)
|
||
|
|
{
|
||
|
|
writel(0x1 << (d->irq - MCF_IRQ_GPIO0), MCFSIM2_GPIOINTCLEAR);
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct irq_chip intc2_irq_gpio_chip = {
|
||
|
|
.name = "CF-INTC2",
|
||
|
|
.irq_mask = intc2_irq_gpio_mask,
|
||
|
|
.irq_unmask = intc2_irq_gpio_unmask,
|
||
|
|
.irq_ack = intc2_irq_gpio_ack,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init mcf_intc2_init(void)
|
||
|
|
{
|
||
|
|
int irq;
|
||
|
|
|
||
|
|
/* GPIO interrupt sources */
|
||
|
|
for (irq = MCF_IRQ_GPIO0; (irq <= MCF_IRQ_GPIO7); irq++) {
|
||
|
|
irq_set_chip(irq, &intc2_irq_gpio_chip);
|
||
|
|
irq_set_handler(irq, handle_edge_irq);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
arch_initcall(mcf_intc2_init);
|