LXR linux/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
  35unsigned long s3c_irqwake_intallow      = 0x00000006L;
  36unsigned long s3c_irqwake_eintallow     = 0xffffffffL;
  37
  38int 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
  70static 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
  91int s3c24xx_irq_suspend(void)
  92{
  93        s3c_pm_do_save(eint_save, ARRAY_SIZE(eint_save));
  94
  95        return 0;
  96}
  97
  98void s3c24xx_irq_resume(void)
  99{
 100        s3c_pm_do_restore(eint_save, ARRAY_SIZE(eint_save));
 101}
 102
 103