2 * linux/arch/arm/mach-pxa/irq.c
4 * Generic PXA IRQ handling
6 * Author: Nicolas Pitre
7 * Created: Jun 15, 2001
8 * Copyright: MontaVista Software Inc.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/interrupt.h>
18 #include <linux/sysdev.h>
20 #include <asm/hardware.h>
22 #include <asm/mach/irq.h>
23 #include <asm/arch/pxa-regs.h>
29 * This is for peripheral IRQs internal to the PXA chip.
32 static void pxa_mask_low_irq(unsigned int irq)
37 static void pxa_unmask_low_irq(unsigned int irq)
42 static struct irq_chip pxa_internal_chip_low = {
44 .ack = pxa_mask_low_irq,
45 .mask = pxa_mask_low_irq,
46 .unmask = pxa_unmask_low_irq,
49 void __init pxa_init_irq_low(void)
53 /* disable all IRQs */
56 /* all IRQs are IRQ, not FIQ */
59 /* only unmasked interrupts kick us out of idle */
62 for (irq = PXA_IRQ(0); irq <= PXA_IRQ(31); irq++) {
63 set_irq_chip(irq, &pxa_internal_chip_low);
64 set_irq_handler(irq, handle_level_irq);
65 set_irq_flags(irq, IRQF_VALID);
69 #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
72 * This is for the second set of internal IRQs as found on the PXA27x.
75 static void pxa_mask_high_irq(unsigned int irq)
77 ICMR2 &= ~(1 << (irq - 32));
80 static void pxa_unmask_high_irq(unsigned int irq)
82 ICMR2 |= (1 << (irq - 32));
85 static struct irq_chip pxa_internal_chip_high = {
87 .ack = pxa_mask_high_irq,
88 .mask = pxa_mask_high_irq,
89 .unmask = pxa_unmask_high_irq,
92 void __init pxa_init_irq_high(void)
99 for (irq = PXA_IRQ(32); irq < PXA_IRQ(64); irq++) {
100 set_irq_chip(irq, &pxa_internal_chip_high);
101 set_irq_handler(irq, handle_level_irq);
102 set_irq_flags(irq, IRQF_VALID);
107 void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int))
109 pxa_internal_chip_low.set_wake = set_wake;
111 pxa_internal_chip_high.set_wake = set_wake;
113 pxa_init_gpio_set_wake(set_wake);
117 static unsigned long saved_icmr[2];
119 static int pxa_irq_suspend(struct sys_device *dev, pm_message_t state)
123 saved_icmr[0] = ICMR;
126 #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
128 saved_icmr[1] = ICMR2;
139 static int pxa_irq_resume(struct sys_device *dev)
143 ICMR = saved_icmr[0];
147 #if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
149 ICMR2 = saved_icmr[1];
160 #define pxa_irq_suspend NULL
161 #define pxa_irq_resume NULL
164 struct sysdev_class pxa_irq_sysclass = {
166 .suspend = pxa_irq_suspend,
167 .resume = pxa_irq_resume,
170 static int __init pxa_irq_init(void)
172 return sysdev_class_register(&pxa_irq_sysclass);
175 core_initcall(pxa_irq_init);