108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2013 Samsung Electronics Co., Ltd.
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* Tomasz Figa <t.figa@samsung.com>
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* Copyright (c) 2004 Simtec Electronics
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* http://armlinux.simtec.co.uk/
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* Written by Ben Dooks, <ben@simtec.co.uk>
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*/
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#ifndef __PLAT_SAMSUNG_PM_COMMON_H
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#define __PLAT_SAMSUNG_PM_COMMON_H __FILE__
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#include <linux/irq.h>
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/* sleep save info */
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/**
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* struct sleep_save - save information for shared peripherals.
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* @reg: Pointer to the register to save.
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* @val: Holder for the value saved from reg.
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*
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* This describes a list of registers which is used by the pm core and
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* other subsystem to save and restore register values over suspend.
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*/
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struct sleep_save {
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void __iomem *reg;
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unsigned long val;
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};
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#define SAVE_ITEM(x) \
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{ .reg = (x) }
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/* helper functions to save/restore lists of registers. */
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extern void s3c_pm_do_save(struct sleep_save *ptr, int count);
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extern void s3c_pm_do_restore(const struct sleep_save *ptr, int count);
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extern void s3c_pm_do_restore_core(const struct sleep_save *ptr, int count);
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/* PM debug functions */
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/**
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* struct pm_uart_save - save block for core UART
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* @ulcon: Save value for S3C2410_ULCON
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* @ucon: Save value for S3C2410_UCON
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* @ufcon: Save value for S3C2410_UFCON
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* @umcon: Save value for S3C2410_UMCON
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* @ubrdiv: Save value for S3C2410_UBRDIV
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*
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* Save block for UART registers to be held over sleep and restored if they
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* are needed (say by debug).
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*/
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struct pm_uart_save {
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u32 ulcon;
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u32 ucon;
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u32 ufcon;
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u32 umcon;
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u32 ubrdiv;
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u32 udivslot;
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};
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#ifdef CONFIG_SAMSUNG_PM_DEBUG
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/**
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* s3c_pm_dbg() - low level debug function for use in suspend/resume.
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* @msg: The message to print.
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*
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* This function is used mainly to debug the resume process before the system
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* can rely on printk/console output. It uses the low-level debugging output
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* routine printascii() to do its work.
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*/
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extern void s3c_pm_dbg(const char *msg, ...);
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/**
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* s3c_pm_debug_init() - suspend/resume low level debug initialization.
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* @base: Virtual base of UART to use for suspend/resume debugging.
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*
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* This function needs to be called before S3C_PMDBG() can be used, to set up
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* UART port base address and configuration.
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*/
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extern void s3c_pm_debug_init(void);
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#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)
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extern void s3c_pm_save_uarts(void);
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extern void s3c_pm_restore_uarts(void);
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#else
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#define S3C_PMDBG(fmt...) pr_debug(fmt)
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#define s3c_pm_debug_init() do { } while (0)
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static inline void s3c_pm_save_uarts(void) { }
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static inline void s3c_pm_restore_uarts(void) { }
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#endif
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/* suspend memory checking */
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#ifdef CONFIG_SAMSUNG_PM_CHECK
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extern void s3c_pm_check_prepare(void);
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extern void s3c_pm_check_restore(void);
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extern void s3c_pm_check_cleanup(void);
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extern void s3c_pm_check_store(void);
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#else
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#define s3c_pm_check_prepare() do { } while (0)
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#define s3c_pm_check_restore() do { } while (0)
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#define s3c_pm_check_cleanup() do { } while (0)
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#define s3c_pm_check_store() do { } while (0)
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#endif
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#endif
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