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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
* Tomasz Figa <t.figa@samsung.com>
* Copyright (c) 2004 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Written by Ben Dooks, <ben@simtec.co.uk>
*/
#ifndef __PLAT_SAMSUNG_PM_COMMON_H
#define __PLAT_SAMSUNG_PM_COMMON_H __FILE__
#include <linux/irq.h>
/* 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) }
/* 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(const struct sleep_save *ptr, int count);
extern void s3c_pm_do_restore_core(const struct sleep_save *ptr, int count);
/* PM debug functions */
/**
* 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;
};
#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, ...);
/**
* s3c_pm_debug_init() - suspend/resume low level debug initialization.
* @base: Virtual base of UART to use for suspend/resume debugging.
*
* This function needs to be called before S3C_PMDBG() can be used, to set up
* UART port base address and configuration.
*/
extern void s3c_pm_debug_init(void);
#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)
extern void s3c_pm_save_uarts(void);
extern void s3c_pm_restore_uarts(void);
#else
#define S3C_PMDBG(fmt...) pr_debug(fmt)
#define s3c_pm_debug_init() do { } while (0)
static inline void s3c_pm_save_uarts(void) { }
static inline void s3c_pm_restore_uarts(void) { }
#endif
/* 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
#endif
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