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-rw-r--r--arch/arm/plat-s3c/include/plat/pm.h174
1 files changed, 174 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c/include/plat/pm.h b/arch/arm/plat-s3c/include/plat/pm.h
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1/* linux/include/asm-arm/plat-s3c24xx/pm.h
2 *
3 * Copyright (c) 2004 Simtec Electronics
4 * http://armlinux.simtec.co.uk/
5 * Written by Ben Dooks, <ben@simtec.co.uk>
6 *
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.
10*/
11
12/* s3c_pm_init
13 *
14 * called from board at initialisation time to setup the power
15 * management
16*/
17
18#ifdef CONFIG_PM
19
20extern __init int s3c_pm_init(void);
21
22#else
23
24static inline int s3c_pm_init(void)
25{
26 return 0;
27}
28#endif
29
30/* configuration for the IRQ mask over sleep */
31extern unsigned long s3c_irqwake_intmask;
32extern unsigned long s3c_irqwake_eintmask;
33
34/* IRQ masks for IRQs allowed to go to sleep (see irq.c) */
35extern unsigned long s3c_irqwake_intallow;
36extern unsigned long s3c_irqwake_eintallow;
37
38/* per-cpu sleep functions */
39
40extern void (*pm_cpu_prep)(void);
41extern void (*pm_cpu_sleep)(void);
42
43/* Flags for PM Control */
44
45extern unsigned long s3c_pm_flags;
46
47/* from sleep.S */
48
49extern int s3c_cpu_save(unsigned long *saveblk);
50extern void s3c_cpu_resume(void);
51
52extern void s3c2410_cpu_suspend(void);
53
54extern unsigned long s3c_sleep_save_phys;
55
56/* sleep save info */
57
58/**
59 * struct sleep_save - save information for shared peripherals.
60 * @reg: Pointer to the register to save.
61 * @val: Holder for the value saved from reg.
62 *
63 * This describes a list of registers which is used by the pm core and
64 * other subsystem to save and restore register values over suspend.
65 */
66struct sleep_save {
67 void __iomem *reg;
68 unsigned long val;
69};
70
71#define SAVE_ITEM(x) \
72 { .reg = (x) }
73
74/**
75 * struct pm_uart_save - save block for core UART
76 * @ulcon: Save value for S3C2410_ULCON
77 * @ucon: Save value for S3C2410_UCON
78 * @ufcon: Save value for S3C2410_UFCON
79 * @umcon: Save value for S3C2410_UMCON
80 * @ubrdiv: Save value for S3C2410_UBRDIV
81 *
82 * Save block for UART registers to be held over sleep and restored if they
83 * are needed (say by debug).
84*/
85struct pm_uart_save {
86 u32 ulcon;
87 u32 ucon;
88 u32 ufcon;
89 u32 umcon;
90 u32 ubrdiv;
91};
92
93/* helper functions to save/restore lists of registers. */
94
95extern void s3c_pm_do_save(struct sleep_save *ptr, int count);
96extern void s3c_pm_do_restore(struct sleep_save *ptr, int count);
97extern void s3c_pm_do_restore_core(struct sleep_save *ptr, int count);
98
99#ifdef CONFIG_PM
100extern int s3c_irqext_wake(unsigned int irqno, unsigned int state);
101extern int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state);
102extern int s3c24xx_irq_resume(struct sys_device *dev);
103#else
104#define s3c_irqext_wake NULL
105#define s3c24xx_irq_suspend NULL
106#define s3c24xx_irq_resume NULL
107#endif
108
109/* PM debug functions */
110
111#ifdef CONFIG_S3C2410_PM_DEBUG
112/**
113 * s3c_pm_dbg() - low level debug function for use in suspend/resume.
114 * @msg: The message to print.
115 *
116 * This function is used mainly to debug the resume process before the system
117 * can rely on printk/console output. It uses the low-level debugging output
118 * routine printascii() to do its work.
119 */
120extern void s3c_pm_dbg(const char *msg, ...);
121
122#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)
123#else
124#define S3C_PMDBG(fmt...) printk(KERN_DEBUG fmt)
125#endif
126
127/* suspend memory checking */
128
129#ifdef CONFIG_S3C2410_PM_CHECK
130extern void s3c_pm_check_prepare(void);
131extern void s3c_pm_check_restore(void);
132extern void s3c_pm_check_cleanup(void);
133extern void s3c_pm_check_store(void);
134#else
135#define s3c_pm_check_prepare() do { } while(0)
136#define s3c_pm_check_restore() do { } while(0)
137#define s3c_pm_check_cleanup() do { } while(0)
138#define s3c_pm_check_store() do { } while(0)
139#endif
140
141/**
142 * s3c_pm_configure_extint() - ensure pins are correctly set for IRQ
143 *
144 * Setup all the necessary GPIO pins for waking the system on external
145 * interrupt.
146 */
147extern void s3c_pm_configure_extint(void);
148
149/**
150 * s3c_pm_restore_gpios() - restore the state of the gpios after sleep.
151 *
152 * Restore the state of the GPIO pins after sleep, which may involve ensuring
153 * that we do not glitch the state of the pins from that the bootloader's
154 * resume code has done.
155*/
156extern void s3c_pm_restore_gpios(void);
157
158/**
159 * s3c_pm_save_gpios() - save the state of the GPIOs for restoring after sleep.
160 *
161 * Save the GPIO states for resotration on resume. See s3c_pm_restore_gpios().
162 */
163extern void s3c_pm_save_gpios(void);
164
165/**
166 * s3c_pm_cb_flushcache - callback for assembly code
167 *
168 * Callback to issue flush_cache_all() as this call is
169 * not a directly callable object.
170 */
171extern void s3c_pm_cb_flushcache(void);
172
173extern void s3c_pm_save_core(void);
174extern void s3c_pm_restore_core(void);
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