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 #include <mach/regs-irq.h>
  26
  27 /* state for IRQs over sleep */
  28
  29 /* default is to allow for EINT0..EINT31, and IRQ_RTC_TIC, IRQ_RTC_ALARM,
  30  * as wakeup sources
  31  *
  32  * set bit to 1 in allow bitfield to enable the wakeup settings on it
  33 */
  34
  35 unsigned long s3c_irqwake_intallow      = 0x00000006L;
  36 unsigned long s3c_irqwake_eintallow     = 0xffffffffL;
  37
  38 int s3c_irq_wake(struct irq_data *data, unsigned int state)
  39 {
  40         unsigned long irqbit;
  41         unsigned int irq_rtc_tic, irq_rtc_alarm;
  42
  43 #ifdef CONFIG_ARCH_EXYNOS
  44         if (soc_is_exynos5250()) {
  45                 irq_rtc_tic = EXYNOS5_IRQ_RTC_TIC;
  46                 irq_rtc_alarm = EXYNOS5_IRQ_RTC_ALARM;
  47         } else {
  48                 irq_rtc_tic = EXYNOS4_IRQ_RTC_TIC;
  49                 irq_rtc_alarm = EXYNOS4_IRQ_RTC_ALARM;
  50         }
  51 #else
  52         irq_rtc_tic = IRQ_RTC_TIC;
  53         irq_rtc_alarm = IRQ_RTC_ALARM;
  54 #endif
  55
  56         if (data->irq == irq_rtc_tic || data->irq == irq_rtc_alarm) {
  57                 irqbit = 1 << (data->irq + 1 - irq_rtc_alarm);
  58
  59                 if (!state)
  60                         s3c_irqwake_intmask |= irqbit;
  61                 else
  62                         s3c_irqwake_intmask &= ~irqbit;
  63         } else {
  64                 return -ENOENT;
  65         }
  66
  67         return 0;
  68 }
  69
  70 static struct sleep_save eint_save[] = {
  71         SAVE_ITEM(S5P_EINT_CON(0)),
  72         SAVE_ITEM(S5P_EINT_CON(1)),
  73         SAVE_ITEM(S5P_EINT_CON(2)),
  74         SAVE_ITEM(S5P_EINT_CON(3)),
  75
  76         SAVE_ITEM(S5P_EINT_FLTCON(0)),
  77         SAVE_ITEM(S5P_EINT_FLTCON(1)),
  78         SAVE_ITEM(S5P_EINT_FLTCON(2)),
  79         SAVE_ITEM(S5P_EINT_FLTCON(3)),
  80         SAVE_ITEM(S5P_EINT_FLTCON(4)),
  81         SAVE_ITEM(S5P_EINT_FLTCON(5)),
  82         SAVE_ITEM(S5P_EINT_FLTCON(6)),
  83         SAVE_ITEM(S5P_EINT_FLTCON(7)),
  84
  85         SAVE_ITEM(S5P_EINT_MASK(0)),
  86         SAVE_ITEM(S5P_EINT_MASK(1)),
  87         SAVE_ITEM(S5P_EINT_MASK(2)),
  88         SAVE_ITEM(S5P_EINT_MASK(3)),
  89 };
  90
  91 int s3c24xx_irq_suspend(void)
  92 {
  93         s3c_pm_do_save(eint_save, ARRAY_SIZE(eint_save));
  94
  95         return 0;
  96 }
  97
  98 void s3c24xx_irq_resume(void)
  99 {
 100         s3c_pm_do_restore(eint_save, ARRAY_SIZE(eint_save));
 101 }
 102