arch/arm/mach-s3c/pm-core-s3c24xx.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright 2008 Simtec Electronics
   4  *      Ben Dooks <ben@simtec.co.uk>
   5  *      http://armlinux.simtec.co.uk/
   6  *
   7  * S3C24xx - PM core support for arch/arm/plat-s3c/pm.c
   8  */
   9
  10 #include <linux/delay.h>
  11 #include <linux/io.h>
  12
  13 #include "regs-clock.h"
  14 #include "regs-irq-s3c24xx.h"
  15 #include <mach/irqs.h>
  16
  17 static inline void s3c_pm_debug_init_uart(void)
  18 {
  19 #ifdef CONFIG_SAMSUNG_PM_DEBUG
  20         unsigned long tmp = __raw_readl(S3C2410_CLKCON);
  21
  22         /* re-start uart clocks */
  23         tmp |= S3C2410_CLKCON_UART0;
  24         tmp |= S3C2410_CLKCON_UART1;
  25         tmp |= S3C2410_CLKCON_UART2;
  26
  27         __raw_writel(tmp, S3C2410_CLKCON);
  28         udelay(10);
  29 #endif
  30 }
  31
  32 static inline void s3c_pm_arch_prepare_irqs(void)
  33 {
  34         __raw_writel(s3c_irqwake_intmask, S3C2410_INTMSK);
  35         __raw_writel(s3c_irqwake_eintmask, S3C2410_EINTMASK);
  36
  37         /* ack any outstanding external interrupts before we go to sleep */
  38
  39         __raw_writel(__raw_readl(S3C2410_EINTPEND), S3C2410_EINTPEND);
  40         __raw_writel(__raw_readl(S3C2410_INTPND), S3C2410_INTPND);
  41         __raw_writel(__raw_readl(S3C2410_SRCPND), S3C2410_SRCPND);
  42
  43 }
  44
  45 static inline void s3c_pm_arch_stop_clocks(void)
  46 {
  47         __raw_writel(0x00, S3C2410_CLKCON);  /* turn off clocks over sleep */
  48 }
  49
  50 /* s3c2410_pm_show_resume_irqs
  51  *
  52  * print any IRQs asserted at resume time (ie, we woke from)
  53 */
  54 static inline void s3c_pm_show_resume_irqs(int start, unsigned long which,
  55                                            unsigned long mask)
  56 {
  57         int i;
  58
  59         which &= ~mask;
  60
  61         for (i = 0; i <= 31; i++) {
  62                 if (which & (1L<<i)) {
  63                         S3C_PMDBG("IRQ %d asserted at resume\n", start+i);
  64                 }
  65         }
  66 }
  67
  68 static inline void s3c_pm_arch_show_resume_irqs(void)
  69 {
  70         S3C_PMDBG("post sleep: IRQs 0x%08x, 0x%08x\n",
  71                   __raw_readl(S3C2410_SRCPND),
  72                   __raw_readl(S3C2410_EINTPEND));
  73
  74         s3c_pm_show_resume_irqs(IRQ_EINT0, __raw_readl(S3C2410_SRCPND),
  75                                 s3c_irqwake_intmask);
  76
  77         s3c_pm_show_resume_irqs(IRQ_EINT4-4, __raw_readl(S3C2410_EINTPEND),
  78                                 s3c_irqwake_eintmask);
  79 }
  80
  81 static inline void s3c_pm_restored_gpios(void) { }
  82 static inline void samsung_pm_saved_gpios(void) { }
  83
  84 /* state for IRQs over sleep */
  85
  86 /* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
  87  *
  88  * set bit to 1 in allow bitfield to enable the wakeup settings on it
  89 */
  90 #ifdef CONFIG_PM_SLEEP
  91 #define s3c_irqwake_intallow    (1L << 30 | 0xfL)
  92 #define s3c_irqwake_eintallow   (0x0000fff0L)
  93 #else
  94 #define s3c_irqwake_eintallow 0
  95 #define s3c_irqwake_intallow  0
  96 #endif