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/* arch/arm/plat-samsung/include/plat/pm.h
*
* Copyright (c) 2004 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Written by Ben Dooks, <ben@simtec.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/* s3c_pm_init
*
* called from board at initialisation time to setup the power
* management
*/
#include <linux/irq.h>
struct device;
#ifdef CONFIG_SAMSUNG_PM
extern __init int s3c_pm_init(void);
extern __init int s3c64xx_pm_init(void);
#else
static inline int s3c_pm_init(void)
{
return 0;
}
static inline int s3c64xx_pm_init(void)
{
return 0;
}
#endif
/* configuration for the IRQ mask over sleep */
extern unsigned long s3c_irqwake_intmask;
extern unsigned long s3c_irqwake_eintmask;
/* IRQ masks for IRQs allowed to go to sleep (see irq.c) */
extern unsigned long s3c_irqwake_intallow;
extern unsigned long s3c_irqwake_eintallow;
/* per-cpu sleep functions */
extern void (*pm_cpu_prep)(void);
extern int (*pm_cpu_sleep)(unsigned long);
/* Flags for PM Control */
extern unsigned long s3c_pm_flags;
extern unsigned char pm_uart_udivslot; /* true to save UART UDIVSLOT */
/* from sleep.S */
extern int s3c2410_cpu_suspend(unsigned long);
/* sleep save info */
/**
* struct sleep_save - save information for shared peripherals.
* @reg: Pointer to the register to save.
* @val: Holder for the value saved from reg.
*
* This describes a list of registers which is used by the pm core and
* other subsystem to save and restore register values over suspend.
*/
struct sleep_save {
void __iomem *reg;
unsigned long val;
};
#define SAVE_ITEM(x) \
{ .reg = (x) }
/**
* struct pm_uart_save - save block for core UART
* @ulcon: Save value for S3C2410_ULCON
* @ucon: Save value for S3C2410_UCON
* @ufcon: Save value for S3C2410_UFCON
* @umcon: Save value for S3C2410_UMCON
* @ubrdiv: Save value for S3C2410_UBRDIV
*
* Save block for UART registers to be held over sleep and restored if they
* are needed (say by debug).
*/
struct pm_uart_save {
u32 ulcon;
u32 ucon;
u32 ufcon;
u32 umcon;
u32 ubrdiv;
u32 udivslot;
};
/* helper functions to save/restore lists of registers. */
extern void s3c_pm_do_save(struct sleep_save *ptr, int count);
extern void s3c_pm_do_restore(struct sleep_save *ptr, int count);
extern void s3c_pm_do_restore_core(struct sleep_save *ptr, int count);
#ifdef CONFIG_SAMSUNG_PM
extern int s3c_irq_wake(struct irq_data *data, unsigned int state);
extern int s3c_irqext_wake(struct irq_data *data, unsigned int state);
extern void s3c_cpu_resume(void);
#else
#define s3c_irq_wake NULL
#define s3c_irqext_wake NULL
#define s3c_cpu_resume NULL
#endif
/* PM debug functions */
#ifdef CONFIG_SAMSUNG_PM_DEBUG
/**
* s3c_pm_dbg() - low level debug function for use in suspend/resume.
* @msg: The message to print.
*
* This function is used mainly to debug the resume process before the system
* can rely on printk/console output. It uses the low-level debugging output
* routine printascii() to do its work.
*/
extern void s3c_pm_dbg(const char *msg, ...);
#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)
#else
#define S3C_PMDBG(fmt...) printk(KERN_DEBUG fmt)
#endif
#ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
/**
* s3c_pm_debug_smdkled() - Debug PM suspend/resume via SMDK Board LEDs
* @set: set bits for the state of the LEDs
* @clear: clear bits for the state of the LEDs.
*/
extern void s3c_pm_debug_smdkled(u32 set, u32 clear);
#else
static inline void s3c_pm_debug_smdkled(u32 set, u32 clear) { }
#endif /* CONFIG_S3C_PM_DEBUG_LED_SMDK */
/* suspend memory checking */
#ifdef CONFIG_SAMSUNG_PM_CHECK
extern void s3c_pm_check_prepare(void);
extern void s3c_pm_check_restore(void);
extern void s3c_pm_check_cleanup(void);
extern void s3c_pm_check_store(void);
#else
#define s3c_pm_check_prepare() do { } while(0)
#define s3c_pm_check_restore() do { } while(0)
#define s3c_pm_check_cleanup() do { } while(0)
#define s3c_pm_check_store() do { } while(0)
#endif
/**
* s3c_pm_configure_extint() - ensure pins are correctly set for IRQ
*
* Setup all the necessary GPIO pins for waking the system on external
* interrupt.
*/
extern void s3c_pm_configure_extint(void);
#ifdef CONFIG_GPIO_SAMSUNG
/**
* samsung_pm_restore_gpios() - restore the state of the gpios after sleep.
*
* Restore the state of the GPIO pins after sleep, which may involve ensuring
* that we do not glitch the state of the pins from that the bootloader's
* resume code has done.
*/
extern void samsung_pm_restore_gpios(void);
/**
* samsung_pm_save_gpios() - save the state of the GPIOs for restoring after sleep.
*
* Save the GPIO states for resotration on resume. See samsung_pm_restore_gpios().
*/
extern void samsung_pm_save_gpios(void);
#else
static inline void samsung_pm_restore_gpios(void) {}
static inline void samsung_pm_save_gpios(void) {}
#endif
extern void s3c_pm_save_core(void);
extern void s3c_pm_restore_core(void);