arch/arm/plat-samsung/include/plat/pm.h

   1 /* arch/arm/plat-samsung/include/plat/pm.h
   2  *
   3  * Copyright (c) 2004 Simtec Electronics
   4  *      http://armlinux.simtec.co.uk/
   5  *      Written by Ben Dooks, <ben@simtec.co.uk>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10 */
  11
  12 /* s3c_pm_init
  13  *
  14  * called from board at initialisation time to setup the power
  15  * management
  16 */
  17
  18 #include <plat/pm-common.h>
  19
  20 struct device;
  21
  22 #ifdef CONFIG_SAMSUNG_PM
  23
  24 extern __init int s3c_pm_init(void);
  25 extern __init int s3c64xx_pm_init(void);
  26
  27 #else
  28
  29 static inline int s3c_pm_init(void)
  30 {
  31         return 0;
  32 }
  33
  34 static inline int s3c64xx_pm_init(void)
  35 {
  36         return 0;
  37 }
  38 #endif
  39
  40 /* configuration for the IRQ mask over sleep */
  41 extern unsigned long s3c_irqwake_intmask;
  42 extern unsigned long s3c_irqwake_eintmask;
  43
  44 /* IRQ masks for IRQs allowed to go to sleep (see irq.c) */
  45 extern unsigned long s3c_irqwake_intallow;
  46 #ifdef CONFIG_PM_SLEEP
  47 extern unsigned long s3c_irqwake_eintallow;
  48 #else
  49 #define s3c_irqwake_eintallow 0
  50 #endif
  51
  52 /* per-cpu sleep functions */
  53
  54 extern void (*pm_cpu_prep)(void);
  55 extern int (*pm_cpu_sleep)(unsigned long);
  56
  57 /* Flags for PM Control */
  58
  59 extern unsigned long s3c_pm_flags;
  60
  61 /* from sleep.S */
  62
  63 extern int s3c2410_cpu_suspend(unsigned long);
  64
  65 #ifdef CONFIG_PM_SLEEP
  66 extern int s3c_irq_wake(struct irq_data *data, unsigned int state);
  67 extern void s3c_cpu_resume(void);
  68 #else
  69 #define s3c_irq_wake NULL
  70 #define s3c_cpu_resume NULL
  71 #endif
  72
  73 #ifdef CONFIG_SAMSUNG_PM
  74 extern int s3c_irqext_wake(struct irq_data *data, unsigned int state);
  75 #else
  76 #define s3c_irqext_wake NULL
  77 #endif
  78
  79 #ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
  80 /**
  81  * s3c_pm_debug_smdkled() - Debug PM suspend/resume via SMDK Board LEDs
  82  * @set: set bits for the state of the LEDs
  83  * @clear: clear bits for the state of the LEDs.
  84  */
  85 extern void s3c_pm_debug_smdkled(u32 set, u32 clear);
  86
  87 #else
  88 static inline void s3c_pm_debug_smdkled(u32 set, u32 clear) { }
  89 #endif /* CONFIG_S3C_PM_DEBUG_LED_SMDK */
  90
  91 /**
  92  * s3c_pm_configure_extint() - ensure pins are correctly set for IRQ
  93  *
  94  * Setup all the necessary GPIO pins for waking the system on external
  95  * interrupt.
  96  */
  97 extern void s3c_pm_configure_extint(void);
  98
  99 #ifdef CONFIG_GPIO_SAMSUNG
 100 /**
 101  * samsung_pm_restore_gpios() - restore the state of the gpios after sleep.
 102  *
 103  * Restore the state of the GPIO pins after sleep, which may involve ensuring
 104  * that we do not glitch the state of the pins from that the bootloader's
 105  * resume code has done.
 106 */
 107 extern void samsung_pm_restore_gpios(void);
 108
 109 /**
 110  * samsung_pm_save_gpios() - save the state of the GPIOs for restoring after sleep.
 111  *
 112  * Save the GPIO states for resotration on resume. See samsung_pm_restore_gpios().
 113  */
 114 extern void samsung_pm_save_gpios(void);
 115 #else
 116 static inline void samsung_pm_restore_gpios(void) {}
 117 static inline void samsung_pm_save_gpios(void) {}
 118 #endif
 119
 120 extern void s3c_pm_save_core(void);
 121 extern void s3c_pm_restore_core(void);