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

   1 /* linux/arch/arm/plat-s5p/irq-pm.c
   2  *
   3  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com
   5  *
   6  * Based on arch/arm/plat-s3c24xx/irq-pm.c,
   7  * Copyright (c) 2003,2004 Simtec Electronics
   8  *      Ben Dooks <ben@simtec.co.uk>
   9  *      http://armlinux.simtec.co.uk/
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14 */
  15
  16 #include <linux/init.h>
  17 #include <linux/module.h>
  18 #include <linux/interrupt.h>
  19
  20 #include <plat/cpu.h>
  21 #include <plat/irqs.h>
  22 #include <plat/pm.h>
  23 #include <mach/map.h>
  24
  25 #include <mach/regs-gpio.h>
  26 #include <mach/regs-irq.h>
  27
  28 /* state for IRQs over sleep */
  29
  30 /* default is to allow for EINT0..EINT31, and IRQ_RTC_TIC, IRQ_RTC_ALARM,
  31  * as wakeup sources
  32  *
  33  * set bit to 1 in allow bitfield to enable the wakeup settings on it
  34 */
  35
  36 unsigned long s3c_irqwake_intallow      = 0x00000006L;
  37 unsigned long s3c_irqwake_eintallow     = 0xffffffffL;
  38
  39 int s3c_irq_wake(struct irq_data *data, unsigned int state)
  40 {
  41         unsigned long irqbit;
  42
  43         switch (data->irq) {
  44         case IRQ_RTC_TIC:
  45         case IRQ_RTC_ALARM:
  46                 irqbit = 1 << (data->irq + 1 - IRQ_RTC_ALARM);
  47                 if (!state)
  48                         s3c_irqwake_intmask |= irqbit;
  49                 else
  50                         s3c_irqwake_intmask &= ~irqbit;
  51                 break;
  52         default:
  53                 return -ENOENT;
  54         }
  55         return 0;
  56 }
  57
  58 static struct sleep_save eint_save[] = {
  59         SAVE_ITEM(S5P_EINT_CON(0)),
  60         SAVE_ITEM(S5P_EINT_CON(1)),
  61         SAVE_ITEM(S5P_EINT_CON(2)),
  62         SAVE_ITEM(S5P_EINT_CON(3)),
  63
  64         SAVE_ITEM(S5P_EINT_FLTCON(0)),
  65         SAVE_ITEM(S5P_EINT_FLTCON(1)),
  66         SAVE_ITEM(S5P_EINT_FLTCON(2)),
  67         SAVE_ITEM(S5P_EINT_FLTCON(3)),
  68         SAVE_ITEM(S5P_EINT_FLTCON(4)),
  69         SAVE_ITEM(S5P_EINT_FLTCON(5)),
  70         SAVE_ITEM(S5P_EINT_FLTCON(6)),
  71         SAVE_ITEM(S5P_EINT_FLTCON(7)),
  72
  73         SAVE_ITEM(S5P_EINT_MASK(0)),
  74         SAVE_ITEM(S5P_EINT_MASK(1)),
  75         SAVE_ITEM(S5P_EINT_MASK(2)),
  76         SAVE_ITEM(S5P_EINT_MASK(3)),
  77 };
  78
  79 int s3c24xx_irq_suspend(void)
  80 {
  81         s3c_pm_do_save(eint_save, ARRAY_SIZE(eint_save));
  82
  83         return 0;
  84 }
  85
  86 void s3c24xx_irq_resume(void)
  87 {
  88         s3c_pm_do_restore(eint_save, ARRAY_SIZE(eint_save));
  89 }
  90