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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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bd117bd161
Add the initial support for the S3C64XX based systems to use suspend-to-RAM to sleep. Includes basic debugging for use with the SMDK6410 usign the LEDs on the baseboard. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
190 lines
5.0 KiB
C
190 lines
5.0 KiB
C
/* linux/include/asm-arm/plat-s3c24xx/pm.h
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*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/* s3c_pm_init
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*
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* called from board at initialisation time to setup the power
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* management
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*/
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#ifdef CONFIG_PM
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extern __init int s3c_pm_init(void);
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#else
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static inline int s3c_pm_init(void)
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{
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return 0;
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}
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#endif
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/* configuration for the IRQ mask over sleep */
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extern unsigned long s3c_irqwake_intmask;
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extern unsigned long s3c_irqwake_eintmask;
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/* IRQ masks for IRQs allowed to go to sleep (see irq.c) */
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extern unsigned long s3c_irqwake_intallow;
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extern unsigned long s3c_irqwake_eintallow;
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/* per-cpu sleep functions */
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extern void (*pm_cpu_prep)(void);
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extern void (*pm_cpu_sleep)(void);
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/* Flags for PM Control */
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extern unsigned long s3c_pm_flags;
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extern unsigned char pm_uart_udivslot; /* true to save UART UDIVSLOT */
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/* from sleep.S */
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extern int s3c_cpu_save(unsigned long *saveblk);
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extern void s3c_cpu_resume(void);
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extern void s3c2410_cpu_suspend(void);
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extern unsigned long s3c_sleep_save_phys;
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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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/**
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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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/* 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(struct sleep_save *ptr, int count);
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extern void s3c_pm_do_restore_core(struct sleep_save *ptr, int count);
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#ifdef CONFIG_PM
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extern int s3c_irqext_wake(unsigned int irqno, unsigned int state);
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extern int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state);
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extern int s3c24xx_irq_resume(struct sys_device *dev);
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#else
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#define s3c_irqext_wake NULL
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#define s3c24xx_irq_suspend NULL
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#define s3c24xx_irq_resume NULL
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#endif
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/* PM debug functions */
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#ifdef CONFIG_S3C2410_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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#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)
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#else
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#define S3C_PMDBG(fmt...) printk(KERN_DEBUG fmt)
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#endif
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#ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
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/**
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* s3c_pm_debug_smdkled() - Debug PM suspend/resume via SMDK Board LEDs
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* @set: set bits for the state of the LEDs
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* @clear: clear bits for the state of the LEDs.
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*/
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extern void s3c_pm_debug_smdkled(u32 set, u32 clear);
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#else
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static inline void s3c_pm_debug_smdkled(u32 set, u32 clear) { }
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#endif /* CONFIG_S3C_PM_DEBUG_LED_SMDK */
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/* suspend memory checking */
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#ifdef CONFIG_S3C2410_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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/**
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* s3c_pm_configure_extint() - ensure pins are correctly set for IRQ
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*
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* Setup all the necessary GPIO pins for waking the system on external
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* interrupt.
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*/
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extern void s3c_pm_configure_extint(void);
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/**
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* s3c_pm_restore_gpios() - restore the state of the gpios after sleep.
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*
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* Restore the state of the GPIO pins after sleep, which may involve ensuring
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* that we do not glitch the state of the pins from that the bootloader's
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* resume code has done.
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*/
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extern void s3c_pm_restore_gpios(void);
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/**
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* s3c_pm_save_gpios() - save the state of the GPIOs for restoring after sleep.
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*
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* Save the GPIO states for resotration on resume. See s3c_pm_restore_gpios().
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*/
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extern void s3c_pm_save_gpios(void);
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/**
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* s3c_pm_cb_flushcache - callback for assembly code
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*
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* Callback to issue flush_cache_all() as this call is
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* not a directly callable object.
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*/
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extern void s3c_pm_cb_flushcache(void);
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extern void s3c_pm_save_core(void);
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extern void s3c_pm_restore_core(void);
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