1/* 2 * Copyright (C) 2013 Samsung Electronics Co., Ltd. 3 * Tomasz Figa <t.figa@samsung.com> 4 * Copyright (c) 2004 Simtec Electronics 5 * http://armlinux.simtec.co.uk/ 6 * Written by Ben Dooks, <ben@simtec.co.uk> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11*/ 12 13#ifndef __PLAT_SAMSUNG_PM_COMMON_H 14#define __PLAT_SAMSUNG_PM_COMMON_H __FILE__ 15 16#include <linux/irq.h> 17 18/* sleep save info */ 19 20/** 21 * struct sleep_save - save information for shared peripherals. 22 * @reg: Pointer to the register to save. 23 * @val: Holder for the value saved from reg. 24 * 25 * This describes a list of registers which is used by the pm core and 26 * other subsystem to save and restore register values over suspend. 27 */ 28struct sleep_save { 29 void __iomem *reg; 30 unsigned long val; 31}; 32 33#define SAVE_ITEM(x) \ 34 { .reg = (x) } 35 36/* helper functions to save/restore lists of registers. */ 37 38extern void s3c_pm_do_save(struct sleep_save *ptr, int count); 39extern void s3c_pm_do_restore(const struct sleep_save *ptr, int count); 40extern void s3c_pm_do_restore_core(const struct sleep_save *ptr, int count); 41 42/* PM debug functions */ 43 44/** 45 * struct pm_uart_save - save block for core UART 46 * @ulcon: Save value for S3C2410_ULCON 47 * @ucon: Save value for S3C2410_UCON 48 * @ufcon: Save value for S3C2410_UFCON 49 * @umcon: Save value for S3C2410_UMCON 50 * @ubrdiv: Save value for S3C2410_UBRDIV 51 * 52 * Save block for UART registers to be held over sleep and restored if they 53 * are needed (say by debug). 54*/ 55struct pm_uart_save { 56 u32 ulcon; 57 u32 ucon; 58 u32 ufcon; 59 u32 umcon; 60 u32 ubrdiv; 61 u32 udivslot; 62}; 63 64#ifdef CONFIG_SAMSUNG_PM_DEBUG 65/** 66 * s3c_pm_dbg() - low level debug function for use in suspend/resume. 67 * @msg: The message to print. 68 * 69 * This function is used mainly to debug the resume process before the system 70 * can rely on printk/console output. It uses the low-level debugging output 71 * routine printascii() to do its work. 72 */ 73extern void s3c_pm_dbg(const char *msg, ...); 74 75/** 76 * s3c_pm_debug_init() - suspend/resume low level debug initialization. 77 * @base: Virtual base of UART to use for suspend/resume debugging. 78 * 79 * This function needs to be called before S3C_PMDBG() can be used, to set up 80 * UART port base address and configuration. 81 */ 82extern void s3c_pm_debug_init(void); 83 84#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt) 85 86extern void s3c_pm_save_uarts(void); 87extern void s3c_pm_restore_uarts(void); 88#else 89#define S3C_PMDBG(fmt...) pr_debug(fmt) 90#define s3c_pm_debug_init() do { } while (0) 91 92static inline void s3c_pm_save_uarts(void) { } 93static inline void s3c_pm_restore_uarts(void) { } 94#endif 95 96/* suspend memory checking */ 97 98#ifdef CONFIG_SAMSUNG_PM_CHECK 99extern void s3c_pm_check_prepare(void); 100extern void s3c_pm_check_restore(void); 101extern void s3c_pm_check_cleanup(void); 102extern void s3c_pm_check_store(void); 103#else 104#define s3c_pm_check_prepare() do { } while (0) 105#define s3c_pm_check_restore() do { } while (0) 106#define s3c_pm_check_cleanup() do { } while (0) 107#define s3c_pm_check_store() do { } while (0) 108#endif 109 110#endif 111