arch/arm/plat-samsung/s5p-irq-pm.c

   1 /*
   2  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
   3  *              http://www.samsung.com
   4  *
   5  * Based on arch/arm/plat-s3c24xx/irq-pm.c,
   6  * Copyright (c) 2003,2004 Simtec Electronics
   7  *      Ben Dooks <ben@simtec.co.uk>
   8  *      http://armlinux.simtec.co.uk/
   9  *
  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.
  13 */
  14
  15 #include <linux/init.h>
  16 #include <linux/module.h>
  17 #include <linux/interrupt.h>
  18
  19 #include <plat/cpu.h>
  20 #include <plat/irqs.h>
  21 #include <plat/pm.h>
  22 #include <mach/map.h>
  23
  24 #include <mach/regs-gpio.h>
  25
  26 #ifndef CONFIG_ARCH_EXYNOS
  27 #include <mach/regs-irq.h>
  28 #endif
  29
  30 /* state for IRQs over sleep */
  31
  32 /* default is to allow for EINT0..EINT31, and IRQ_RTC_TIC, IRQ_RTC_ALARM,
  33  * as wakeup sources
  34  *
  35  * set bit to 1 in allow bitfield to enable the wakeup settings on it
  36 */
  37
  38 unsigned long s3c_irqwake_intallow      = 0x00000006L;
  39 unsigned long s3c_irqwake_eintallow     = 0xffffffffL;
  40
  41 int s3c_irq_wake(struct irq_data *data, unsigned int state)
  42 {
  43         unsigned long irqbit;
  44         unsigned int irq_rtc_tic, irq_rtc_alarm;
  45
  46 #ifdef CONFIG_ARCH_EXYNOS
  47         if (soc_is_exynos5250()) {
  48                 irq_rtc_tic = EXYNOS5_IRQ_RTC_TIC;
  49                 irq_rtc_alarm = EXYNOS5_IRQ_RTC_ALARM;
  50         } else {
  51                 irq_rtc_tic = EXYNOS4_IRQ_RTC_TIC;
  52                 irq_rtc_alarm = EXYNOS4_IRQ_RTC_ALARM;
  53         }
  54 #else
  55         irq_rtc_tic = IRQ_RTC_TIC;
  56         irq_rtc_alarm = IRQ_RTC_ALARM;
  57 #endif
  58
  59         if (data->irq == irq_rtc_tic || data->irq == irq_rtc_alarm) {
  60                 irqbit = 1 << (data->irq + 1 - irq_rtc_alarm);
  61
  62                 if (!state)
  63                         s3c_irqwake_intmask |= irqbit;
  64                 else
  65                         s3c_irqwake_intmask &= ~irqbit;
  66         } else {
  67                 return -ENOENT;
  68         }
  69
  70         return 0;
  71 }
  72
  73 static struct sleep_save eint_save[] = {
  74         SAVE_ITEM(S5P_EINT_CON(0)),
  75         SAVE_ITEM(S5P_EINT_CON(1)),
  76         SAVE_ITEM(S5P_EINT_CON(2)),
  77         SAVE_ITEM(S5P_EINT_CON(3)),
  78
  79         SAVE_ITEM(S5P_EINT_FLTCON(0)),
  80         SAVE_ITEM(S5P_EINT_FLTCON(1)),
  81         SAVE_ITEM(S5P_EINT_FLTCON(2)),
  82         SAVE_ITEM(S5P_EINT_FLTCON(3)),
  83         SAVE_ITEM(S5P_EINT_FLTCON(4)),
  84         SAVE_ITEM(S5P_EINT_FLTCON(5)),
  85         SAVE_ITEM(S5P_EINT_FLTCON(6)),
  86         SAVE_ITEM(S5P_EINT_FLTCON(7)),
  87
  88         SAVE_ITEM(S5P_EINT_MASK(0)),
  89         SAVE_ITEM(S5P_EINT_MASK(1)),
  90         SAVE_ITEM(S5P_EINT_MASK(2)),
  91         SAVE_ITEM(S5P_EINT_MASK(3)),
  92 };
  93
  94 int s3c24xx_irq_suspend(void)
  95 {
  96         s3c_pm_do_save(eint_save, ARRAY_SIZE(eint_save));
  97
  98         return 0;
  99 }
 100
 101 void s3c24xx_irq_resume(void)
 102 {
 103         s3c_pm_do_restore(eint_save, ARRAY_SIZE(eint_save));
 104 }
 105