1 /* arch/arm/plat-samsung/include/plat/pm.h
3 * Copyright (c) 2004 Simtec Electronics
4 * http://armlinux.simtec.co.uk/
5 * Written by Ben Dooks, <ben@simtec.co.uk>
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.
14 * called from board at initialisation time to setup the power
18 #include <linux/irq.h>
24 extern __init
int s3c_pm_init(void);
25 extern __init
int s3c64xx_pm_init(void);
29 static inline int s3c_pm_init(void)
34 static inline int s3c64xx_pm_init(void)
40 /* configuration for the IRQ mask over sleep */
41 extern unsigned long s3c_irqwake_intmask
;
42 extern unsigned long s3c_irqwake_eintmask
;
44 /* IRQ masks for IRQs allowed to go to sleep (see irq.c) */
45 extern unsigned long s3c_irqwake_intallow
;
46 extern unsigned long s3c_irqwake_eintallow
;
48 /* per-cpu sleep functions */
50 extern void (*pm_cpu_prep
)(void);
51 extern int (*pm_cpu_sleep
)(unsigned long);
53 /* Flags for PM Control */
55 extern unsigned long s3c_pm_flags
;
57 extern unsigned char pm_uart_udivslot
; /* true to save UART UDIVSLOT */
61 extern void s3c_cpu_resume(void);
63 extern int s3c2410_cpu_suspend(unsigned long);
68 * struct sleep_save - save information for shared peripherals.
69 * @reg: Pointer to the register to save.
70 * @val: Holder for the value saved from reg.
72 * This describes a list of registers which is used by the pm core and
73 * other subsystem to save and restore register values over suspend.
80 #define SAVE_ITEM(x) \
84 * struct pm_uart_save - save block for core UART
85 * @ulcon: Save value for S3C2410_ULCON
86 * @ucon: Save value for S3C2410_UCON
87 * @ufcon: Save value for S3C2410_UFCON
88 * @umcon: Save value for S3C2410_UMCON
89 * @ubrdiv: Save value for S3C2410_UBRDIV
91 * Save block for UART registers to be held over sleep and restored if they
92 * are needed (say by debug).
103 /* helper functions to save/restore lists of registers. */
105 extern void s3c_pm_do_save(struct sleep_save
*ptr
, int count
);
106 extern void s3c_pm_do_restore(struct sleep_save
*ptr
, int count
);
107 extern void s3c_pm_do_restore_core(struct sleep_save
*ptr
, int count
);
110 extern int s3c_irq_wake(struct irq_data
*data
, unsigned int state
);
111 extern int s3c_irqext_wake(struct irq_data
*data
, unsigned int state
);
113 #define s3c_irq_wake NULL
114 #define s3c_irqext_wake NULL
117 /* PM debug functions */
119 #ifdef CONFIG_SAMSUNG_PM_DEBUG
121 * s3c_pm_dbg() - low level debug function for use in suspend/resume.
122 * @msg: The message to print.
124 * This function is used mainly to debug the resume process before the system
125 * can rely on printk/console output. It uses the low-level debugging output
126 * routine printascii() to do its work.
128 extern void s3c_pm_dbg(const char *msg
, ...);
130 #define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)
132 #define S3C_PMDBG(fmt...) printk(KERN_DEBUG fmt)
135 #ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
137 * s3c_pm_debug_smdkled() - Debug PM suspend/resume via SMDK Board LEDs
138 * @set: set bits for the state of the LEDs
139 * @clear: clear bits for the state of the LEDs.
141 extern void s3c_pm_debug_smdkled(u32 set
, u32 clear
);
144 static inline void s3c_pm_debug_smdkled(u32 set
, u32 clear
) { }
145 #endif /* CONFIG_S3C_PM_DEBUG_LED_SMDK */
147 /* suspend memory checking */
149 #ifdef CONFIG_SAMSUNG_PM_CHECK
150 extern void s3c_pm_check_prepare(void);
151 extern void s3c_pm_check_restore(void);
152 extern void s3c_pm_check_cleanup(void);
153 extern void s3c_pm_check_store(void);
155 #define s3c_pm_check_prepare() do { } while(0)
156 #define s3c_pm_check_restore() do { } while(0)
157 #define s3c_pm_check_cleanup() do { } while(0)
158 #define s3c_pm_check_store() do { } while(0)
162 * s3c_pm_configure_extint() - ensure pins are correctly set for IRQ
164 * Setup all the necessary GPIO pins for waking the system on external
167 extern void s3c_pm_configure_extint(void);
169 #ifdef CONFIG_GPIO_SAMSUNG
171 * samsung_pm_restore_gpios() - restore the state of the gpios after sleep.
173 * Restore the state of the GPIO pins after sleep, which may involve ensuring
174 * that we do not glitch the state of the pins from that the bootloader's
175 * resume code has done.
177 extern void samsung_pm_restore_gpios(void);
180 * samsung_pm_save_gpios() - save the state of the GPIOs for restoring after sleep.
182 * Save the GPIO states for resotration on resume. See samsung_pm_restore_gpios().
184 extern void samsung_pm_save_gpios(void);
186 static inline void samsung_pm_restore_gpios(void) {}
187 static inline void samsung_pm_save_gpios(void) {}
190 extern void s3c_pm_save_core(void);
191 extern void s3c_pm_restore_core(void);
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