arch/arm/plat-s3c/include/plat/pm.h

   1 /* linux/include/asm-arm/plat-s3c24xx/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 /* s3c2410_pm_init
  13  *
  14  * called from board at initialisation time to setup the power
  15  * management
  16 */
  17
  18 #ifdef CONFIG_PM
  19
  20 extern __init int s3c2410_pm_init(void);
  21
  22 #else
  23
  24 static inline int s3c2410_pm_init(void)
  25 {
  26         return 0;
  27 }
  28 #endif
  29
  30 /* configuration for the IRQ mask over sleep */
  31 extern unsigned long s3c_irqwake_intmask;
  32 extern unsigned long s3c_irqwake_eintmask;
  33
  34 /* IRQ masks for IRQs allowed to go to sleep (see irq.c) */
  35 extern unsigned long s3c_irqwake_intallow;
  36 extern unsigned long s3c_irqwake_eintallow;
  37
  38 /* per-cpu sleep functions */
  39
  40 extern void (*pm_cpu_prep)(void);
  41 extern void (*pm_cpu_sleep)(void);
  42
  43 /* Flags for PM Control */
  44
  45 extern unsigned long s3c_pm_flags;
  46
  47 /* from sleep.S */
  48
  49 extern int  s3c2410_cpu_save(unsigned long *saveblk);
  50 extern void s3c2410_cpu_suspend(void);
  51 extern void s3c2410_cpu_resume(void);
  52
  53 extern unsigned long s3c_sleep_save_phys;
  54
  55 /* sleep save info */
  56
  57 /**
  58  * struct sleep_save - save information for shared peripherals.
  59  * @reg: Pointer to the register to save.
  60  * @val: Holder for the value saved from reg.
  61  *
  62  * This describes a list of registers which is used by the pm core and
  63  * other subsystem to save and restore register values over suspend.
  64  */
  65 struct sleep_save {
  66         void __iomem    *reg;
  67         unsigned long   val;
  68 };
  69
  70 #define SAVE_ITEM(x) \
  71         { .reg = (x) }
  72
  73 /* helper functions to save/restore lists of registers. */
  74
  75 extern void s3c_pm_do_save(struct sleep_save *ptr, int count);
  76 extern void s3c_pm_do_restore(struct sleep_save *ptr, int count);
  77 extern void s3c_pm_do_restore_core(struct sleep_save *ptr, int count);
  78
  79 #ifdef CONFIG_PM
  80 extern int s3c_irqext_wake(unsigned int irqno, unsigned int state);
  81 extern int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state);
  82 extern int s3c24xx_irq_resume(struct sys_device *dev);
  83 #else
  84 #define s3c_irqext_wake NULL
  85 #define s3c24xx_irq_suspend NULL
  86 #define s3c24xx_irq_resume  NULL
  87 #endif
  88
  89 /* PM debug functions */
  90
  91 #ifdef CONFIG_S3C2410_PM_DEBUG
  92 /**
  93  * s3c_pm_dbg() - low level debug function for use in suspend/resume.
  94  * @msg: The message to print.
  95  *
  96  * This function is used mainly to debug the resume process before the system
  97  * can rely on printk/console output. It uses the low-level debugging output
  98  * routine printascii() to do its work.
  99  */
 100 extern void s3c_pm_dbg(const char *msg, ...);
 101
 102 #define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)
 103 #else
 104 #define S3C_PMDBG(fmt...) printk(KERN_DEBUG fmt)
 105 #endif
 106
 107 /* suspend memory checking */
 108
 109 #ifdef CONFIG_S3C2410_PM_CHECK
 110 extern void s3c_pm_check_prepare(void);
 111 extern void s3c_pm_check_restore(void);
 112 extern void s3c_pm_check_store(void);
 113 #else
 114 #define s3c_pm_check_prepare() do { } while(0)
 115 #define s3c_pm_check_restore() do { } while(0)
 116 #define s3c_pm_check_store()   do { } while(0)
 117 #endif
 118
 119 /**
 120  * s3c_pm_configure_extint() - ensure pins are correctly set for IRQ
 121  *
 122  * Setup all the necessary GPIO pins for waking the system on external
 123  * interrupt.
 124  */
 125 extern void s3c_pm_configure_extint(void);
 126
 127 /**
 128  * s3c_pm_restore_gpios() - restore the state of the gpios after sleep.
 129  *
 130  * Restore the state of the GPIO pins after sleep, which may involve ensuring
 131  * that we do not glitch the state of the pins from that the bootloader's
 132  * resume code has done.
 133 */
 134 extern void s3c_pm_restore_gpios(void);
 135
 136 /**
 137  * s3c_pm_save_gpios() - save the state of the GPIOs for restoring after sleep.
 138  *
 139  * Save the GPIO states for resotration on resume. See s3c_pm_restore_gpios().
 140  */
 141 extern void s3c_pm_save_gpios(void);
 142
 143 extern void s3c_pm_save_core(void);
 144 extern void s3c_pm_restore_core(void);