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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright 2008 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* S3C24xx - PM core support for arch/arm/plat-s3c/pm.c
*/
#include <linux/delay.h>
#include <linux/io.h>
#include "regs-clock.h"
#include "regs-irq-s3c24xx.h"
#include "irqs.h"
static inline void s3c_pm_debug_init_uart(void)
{
#ifdef CONFIG_SAMSUNG_PM_DEBUG
unsigned long tmp = __raw_readl(S3C2410_CLKCON);
/* re-start uart clocks */
tmp |= S3C2410_CLKCON_UART0;
tmp |= S3C2410_CLKCON_UART1;
tmp |= S3C2410_CLKCON_UART2;
__raw_writel(tmp, S3C2410_CLKCON);
udelay(10);
#endif
}
static inline void s3c_pm_arch_prepare_irqs(void)
{
__raw_writel(s3c_irqwake_intmask, S3C2410_INTMSK);
__raw_writel(s3c_irqwake_eintmask, S3C2410_EINTMASK);
/* ack any outstanding external interrupts before we go to sleep */
__raw_writel(__raw_readl(S3C2410_EINTPEND), S3C2410_EINTPEND);
__raw_writel(__raw_readl(S3C2410_INTPND), S3C2410_INTPND);
__raw_writel(__raw_readl(S3C2410_SRCPND), S3C2410_SRCPND);
}
static inline void s3c_pm_arch_stop_clocks(void)
{
__raw_writel(0x00, S3C2410_CLKCON); /* turn off clocks over sleep */
}
/* s3c2410_pm_show_resume_irqs
*
* print any IRQs asserted at resume time (ie, we woke from)
*/
static inline void s3c_pm_show_resume_irqs(int start, unsigned long which,
unsigned long mask)
{
int i;
which &= ~mask;
for (i = 0; i <= 31; i++) {
if (which & (1L<<i)) {
S3C_PMDBG("IRQ %d asserted at resume\n", start+i);
}
}
}
static inline void s3c_pm_arch_show_resume_irqs(void)
{
S3C_PMDBG("post sleep: IRQs 0x%08x, 0x%08x\n",
__raw_readl(S3C2410_SRCPND),
__raw_readl(S3C2410_EINTPEND));
s3c_pm_show_resume_irqs(IRQ_EINT0, __raw_readl(S3C2410_SRCPND),
s3c_irqwake_intmask);
s3c_pm_show_resume_irqs(IRQ_EINT4-4, __raw_readl(S3C2410_EINTPEND),
s3c_irqwake_eintmask);
}
static inline void s3c_pm_restored_gpios(void) { }
static inline void samsung_pm_saved_gpios(void) { }
/* state for IRQs over sleep */
/* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
*
* set bit to 1 in allow bitfield to enable the wakeup settings on it
*/
#ifdef CONFIG_PM_SLEEP
#define s3c_irqwake_intallow (1L << 30 | 0xfL)
#define s3c_irqwake_eintallow (0x0000fff0L)
#else
#define s3c_irqwake_eintallow 0
#define s3c_irqwake_intallow 0
#endif
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