1 /* linux/arch/arm/plat-s3c24xx/irq-om.c
3 * Copyright (c) 2003-2004 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
5 * http://armlinux.simtec.co.uk/
7 * S3C24XX - IRQ PM code
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/init.h>
15 #include <linux/module.h>
16 #include <linux/interrupt.h>
17 #include <linux/irq.h>
18 #include <linux/syscore_ops.h>
26 /* state for IRQs over sleep */
28 /* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
30 * set bit to 1 in allow bitfield to enable the wakeup settings on it
33 unsigned long s3c_irqwake_intallow = 1L << 30 | 0xfL;
34 unsigned long s3c_irqwake_eintallow = 0x0000fff0L;
36 int s3c_irq_wake(struct irq_data *data, unsigned int state)
38 unsigned long irqbit = 1 << data->hwirq;
40 if (!(s3c_irqwake_intallow & irqbit))
43 pr_info("wake %s for hwirq %lu\n",
44 state ? "enabled" : "disabled", data->hwirq);
47 s3c_irqwake_intmask |= irqbit;
49 s3c_irqwake_intmask &= ~irqbit;
54 static struct sleep_save irq_save[] = {
55 SAVE_ITEM(S3C2410_INTMSK),
56 SAVE_ITEM(S3C2410_INTSUBMSK),
59 /* the extint values move between the s3c2410/s3c2440 and the s3c2412
60 * so we use an array to hold them, and to calculate the address of
61 * the register at run-time
64 static unsigned long save_extint[3];
65 static unsigned long save_eintflt[4];
66 static unsigned long save_eintmask;
68 static int s3c24xx_irq_suspend(void)
72 for (i = 0; i < ARRAY_SIZE(save_extint); i++)
73 save_extint[i] = __raw_readl(S3C24XX_EXTINT0 + (i*4));
75 for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
76 save_eintflt[i] = __raw_readl(S3C24XX_EINFLT0 + (i*4));
78 s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
79 save_eintmask = __raw_readl(S3C24XX_EINTMASK);
84 static void s3c24xx_irq_resume(void)
88 for (i = 0; i < ARRAY_SIZE(save_extint); i++)
89 __raw_writel(save_extint[i], S3C24XX_EXTINT0 + (i*4));
91 for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
92 __raw_writel(save_eintflt[i], S3C24XX_EINFLT0 + (i*4));
94 s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
95 __raw_writel(save_eintmask, S3C24XX_EINTMASK);
98 struct syscore_ops s3c24xx_irq_syscore_ops = {
99 .suspend = s3c24xx_irq_suspend,
100 .resume = s3c24xx_irq_resume,
103 #ifdef CONFIG_CPU_S3C2416
104 static struct sleep_save s3c2416_irq_save[] = {
105 SAVE_ITEM(S3C2416_INTMSK2),
108 static int s3c2416_irq_suspend(void)
110 s3c_pm_do_save(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
115 static void s3c2416_irq_resume(void)
117 s3c_pm_do_restore(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
120 struct syscore_ops s3c2416_irq_syscore_ops = {
121 .suspend = s3c2416_irq_suspend,
122 .resume = s3c2416_irq_resume,