arch/arm/mach-s3c24xx/include/mach/pm-core.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.h"
  15
  16 static inline void s3c_pm_debug_init_uart(void)
  17 {
  18         unsigned long tmp = __raw_readl(S3C2410_CLKCON);
  19
  20         /* re-start uart clocks */
  21         tmp |= S3C2410_CLKCON_UART0;
  22         tmp |= S3C2410_CLKCON_UART1;
  23         tmp |= S3C2410_CLKCON_UART2;
  24
  25         __raw_writel(tmp, S3C2410_CLKCON);
  26         udelay(10);
  27 }
  28
  29 static inline void s3c_pm_arch_prepare_irqs(void)
  30 {
  31         __raw_writel(s3c_irqwake_intmask, S3C2410_INTMSK);
  32         __raw_writel(s3c_irqwake_eintmask, S3C2410_EINTMASK);
  33
  34         /* ack any outstanding external interrupts before we go to sleep */
  35
  36         __raw_writel(__raw_readl(S3C2410_EINTPEND), S3C2410_EINTPEND);
  37         __raw_writel(__raw_readl(S3C2410_INTPND), S3C2410_INTPND);
  38         __raw_writel(__raw_readl(S3C2410_SRCPND), S3C2410_SRCPND);
  39
  40 }
  41
  42 static inline void s3c_pm_arch_stop_clocks(void)
  43 {
  44         __raw_writel(0x00, S3C2410_CLKCON);  /* turn off clocks over sleep */
  45 }
  46
  47 /* s3c2410_pm_show_resume_irqs
  48  *
  49  * print any IRQs asserted at resume time (ie, we woke from)
  50 */
  51 static inline void s3c_pm_show_resume_irqs(int start, unsigned long which,
  52                                            unsigned long mask)
  53 {
  54         int i;
  55
  56         which &= ~mask;
  57
  58         for (i = 0; i <= 31; i++) {
  59                 if (which & (1L<<i)) {
  60                         S3C_PMDBG("IRQ %d asserted at resume\n", start+i);
  61                 }
  62         }
  63 }
  64
  65 static inline void s3c_pm_arch_show_resume_irqs(void)
  66 {
  67         S3C_PMDBG("post sleep: IRQs 0x%08x, 0x%08x\n",
  68                   __raw_readl(S3C2410_SRCPND),
  69                   __raw_readl(S3C2410_EINTPEND));
  70
  71         s3c_pm_show_resume_irqs(IRQ_EINT0, __raw_readl(S3C2410_SRCPND),
  72                                 s3c_irqwake_intmask);
  73
  74         s3c_pm_show_resume_irqs(IRQ_EINT4-4, __raw_readl(S3C2410_EINTPEND),
  75                                 s3c_irqwake_eintmask);
  76 }
  77
  78 static inline void s3c_pm_arch_update_uart(void __iomem *regs,
  79                                            struct pm_uart_save *save)
  80 {
  81 }
  82
  83 static inline void s3c_pm_restored_gpios(void) { }
  84 static inline void samsung_pm_saved_gpios(void) { }
  85
  86 /* state for IRQs over sleep */
  87
  88 /* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
  89  *
  90  * set bit to 1 in allow bitfield to enable the wakeup settings on it
  91 */
  92 #ifdef CONFIG_PM_SLEEP
  93 #define s3c_irqwake_intallow    (1L << 30 | 0xfL)
  94 #define s3c_irqwake_eintallow   (0x0000fff0L)
  95 #else
  96 #define s3c_irqwake_eintallow 0
  97 #define s3c_irqwake_intallow  0
  98 #endif