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
20 static 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
28 static 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
36 static void intc2_irq_gpio_ack(struct irq_data *d)
37 {
38 writel(0x1 << (d->irq - MCF_IRQ_GPIO0), MCFSIM2_GPIOINTCLEAR);
39 }
40
41 static 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
48 static 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
61 arch_initcall(mcf_intc2_init);
62
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