arch/arm/mach-s3c24xx/irq-pm.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (c) 2003-2004 Simtec Electronics
   4 //      Ben Dooks <ben@simtec.co.uk>
   5 //      http://armlinux.simtec.co.uk/
   6 //
   7 // S3C24XX - IRQ PM code
   8
   9 #include <linux/init.h>
  10 #include <linux/module.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/irq.h>
  13 #include <linux/syscore_ops.h>
  14 #include <linux/io.h>
  15
  16 #include <plat/cpu.h>
  17 #include <plat/pm.h>
  18 #include <plat/map-base.h>
  19 #include <plat/map-s3c.h>
  20
  21 #include <mach/regs-irq.h>
  22 #include <mach/regs-gpio.h>
  23 #include <mach/pm-core.h>
  24
  25 #include <asm/irq.h>
  26
  27 int s3c_irq_wake(struct irq_data *data, unsigned int state)
  28 {
  29         unsigned long irqbit = 1 << data->hwirq;
  30
  31         if (!(s3c_irqwake_intallow & irqbit))
  32                 return -ENOENT;
  33
  34         pr_info("wake %s for hwirq %lu\n",
  35                 state ? "enabled" : "disabled", data->hwirq);
  36
  37         if (!state)
  38                 s3c_irqwake_intmask |= irqbit;
  39         else
  40                 s3c_irqwake_intmask &= ~irqbit;
  41
  42         return 0;
  43 }
  44
  45 static struct sleep_save irq_save[] = {
  46         SAVE_ITEM(S3C2410_INTMSK),
  47         SAVE_ITEM(S3C2410_INTSUBMSK),
  48 };
  49
  50 /* the extint values move between the s3c2410/s3c2440 and the s3c2412
  51  * so we use an array to hold them, and to calculate the address of
  52  * the register at run-time
  53 */
  54
  55 static unsigned long save_extint[3];
  56 static unsigned long save_eintflt[4];
  57 static unsigned long save_eintmask;
  58
  59 static int s3c24xx_irq_suspend(void)
  60 {
  61         unsigned int i;
  62
  63         for (i = 0; i < ARRAY_SIZE(save_extint); i++)
  64                 save_extint[i] = __raw_readl(S3C24XX_EXTINT0 + (i*4));
  65
  66         for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
  67                 save_eintflt[i] = __raw_readl(S3C24XX_EINFLT0 + (i*4));
  68
  69         s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
  70         save_eintmask = __raw_readl(S3C24XX_EINTMASK);
  71
  72         return 0;
  73 }
  74
  75 static void s3c24xx_irq_resume(void)
  76 {
  77         unsigned int i;
  78
  79         for (i = 0; i < ARRAY_SIZE(save_extint); i++)
  80                 __raw_writel(save_extint[i], S3C24XX_EXTINT0 + (i*4));
  81
  82         for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
  83                 __raw_writel(save_eintflt[i], S3C24XX_EINFLT0 + (i*4));
  84
  85         s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
  86         __raw_writel(save_eintmask, S3C24XX_EINTMASK);
  87 }
  88
  89 struct syscore_ops s3c24xx_irq_syscore_ops = {
  90         .suspend        = s3c24xx_irq_suspend,
  91         .resume         = s3c24xx_irq_resume,
  92 };
  93
  94 #ifdef CONFIG_CPU_S3C2416
  95 static struct sleep_save s3c2416_irq_save[] = {
  96         SAVE_ITEM(S3C2416_INTMSK2),
  97 };
  98
  99 static int s3c2416_irq_suspend(void)
 100 {
 101         s3c_pm_do_save(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
 102
 103         return 0;
 104 }
 105
 106 static void s3c2416_irq_resume(void)
 107 {
 108         s3c_pm_do_restore(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
 109 }
 110
 111 struct syscore_ops s3c2416_irq_syscore_ops = {
 112         .suspend        = s3c2416_irq_suspend,
 113         .resume         = s3c2416_irq_resume,
 114 };
 115 #endif