| /* 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 |
