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da3601a5 GU |
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(unsigned int irq) | |
21 | { | |
22 | u32 imr; | |
23 | imr = readl(MCF_MBAR2 + MCFSIM2_GPIOINTENABLE); | |
24 | imr &= ~(0x1 << (irq - MCFINTC2_GPIOIRQ0)); | |
25 | writel(imr, MCF_MBAR2 + MCFSIM2_GPIOINTENABLE); | |
26 | } | |
27 | ||
28 | static void intc2_irq_gpio_unmask(unsigned int irq) | |
29 | { | |
30 | u32 imr; | |
31 | imr = readl(MCF_MBAR2 + MCFSIM2_GPIOINTENABLE); | |
32 | imr |= (0x1 << (irq - MCFINTC2_GPIOIRQ0)); | |
33 | writel(imr, MCF_MBAR2 + MCFSIM2_GPIOINTENABLE); | |
34 | } | |
35 | ||
36 | static void intc2_irq_gpio_ack(unsigned int irq) | |
37 | { | |
38 | writel(0x1 << (irq - MCFINTC2_GPIOIRQ0), MCF_MBAR2 + MCFSIM2_GPIOINTCLEAR); | |
39 | } | |
40 | ||
41 | static struct irq_chip intc2_irq_gpio_chip = { | |
42 | .name = "CF-INTC2", | |
43 | .mask = intc2_irq_gpio_mask, | |
44 | .unmask = intc2_irq_gpio_unmask, | |
45 | .ack = intc2_irq_gpio_ack, | |
46 | }; | |
47 | ||
48 | static int __init mcf_intc2_init(void) | |
49 | { | |
50 | int irq; | |
51 | ||
52 | /* GPIO interrupt sources */ | |
86d306c9 | 53 | for (irq = MCFINTC2_GPIOIRQ0; (irq <= MCFINTC2_GPIOIRQ7); irq++) { |
da3601a5 | 54 | irq_desc[irq].chip = &intc2_irq_gpio_chip; |
86d306c9 GU |
55 | set_irq_handler(irq, handle_edge_irq); |
56 | } | |
da3601a5 GU |
57 | |
58 | return 0; | |
59 | } | |
60 | ||
61 | arch_initcall(mcf_intc2_init); |