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/Ethereal-msm8939-beta9/arch/m68k/platform/coldfire/intc-5249.c

https://bitbucket.org/MilosStamenkovic95/etherealos
C | 61 lines | 42 code | 9 blank | 10 comment | 1 complexity | 4d15ecdb75f0660a40b025a79e043aef MD5 | raw file
 1/*
 2 * intc2.c  -- support for the 2nd INTC controller of the 5249
 3 *
 4 * (C) Copyright 2009, Greg Ungerer <gerg@snapgear.com>
 5 *
 6 * This file is subject to the terms and conditions of the GNU General Public
 7 * License.  See the file COPYING in the main directory of this archive
 8 * for more details.
 9 */
10
11#include <linux/types.h>
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <linux/interrupt.h>
15#include <linux/irq.h>
16#include <linux/io.h>
17#include <asm/coldfire.h>
18#include <asm/mcfsim.h>
19
20static void intc2_irq_gpio_mask(struct irq_data *d)
21{
22	u32 imr;
23	imr = readl(MCFSIM2_GPIOINTENABLE);
24	imr &= ~(0x1 << (d->irq - MCF_IRQ_GPIO0));
25	writel(imr, MCFSIM2_GPIOINTENABLE);
26}
27
28static void intc2_irq_gpio_unmask(struct irq_data *d)
29{
30	u32 imr;
31	imr = readl(MCFSIM2_GPIOINTENABLE);
32	imr |= (0x1 << (d->irq - MCF_IRQ_GPIO0));
33	writel(imr, MCFSIM2_GPIOINTENABLE);
34}
35
36static void intc2_irq_gpio_ack(struct irq_data *d)
37{
38	writel(0x1 << (d->irq - MCF_IRQ_GPIO0), MCFSIM2_GPIOINTCLEAR);
39}
40
41static struct irq_chip intc2_irq_gpio_chip = {
42	.name		= "CF-INTC2",
43	.irq_mask	= intc2_irq_gpio_mask,
44	.irq_unmask	= intc2_irq_gpio_unmask,
45	.irq_ack	= intc2_irq_gpio_ack,
46};
47
48static int __init mcf_intc2_init(void)
49{
50	int irq;
51
52	/* GPIO interrupt sources */
53	for (irq = MCF_IRQ_GPIO0; (irq <= MCF_IRQ_GPIO7); irq++) {
54		irq_set_chip(irq, &intc2_irq_gpio_chip);
55		irq_set_handler(irq, handle_edge_irq);
56	}
57
58	return 0;
59}
60
61arch_initcall(mcf_intc2_init);