arm/mach-s3c/pm-core-s3c24xx.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  * Copyright 2008 Simtec Electronics
0004  *      Ben Dooks <ben@simtec.co.uk>
0005  *      http://armlinux.simtec.co.uk/
0006  *
0007  * S3C24xx - PM core support for arch/arm/plat-s3c/pm.c
0008  */
0009
0010 #include <linux/delay.h>
0011 #include <linux/io.h>
0012
0013 #include "regs-clock.h"
0014 #include "regs-irq-s3c24xx.h"
0015 #include "irqs.h"
0016
0017 static inline void s3c_pm_debug_init_uart(void)
0018 {
0019 #ifdef CONFIG_SAMSUNG_PM_DEBUG
0020     unsigned long tmp = __raw_readl(S3C2410_CLKCON);
0021
0022     /* re-start uart clocks */
0023     tmp |= S3C2410_CLKCON_UART0;
0024     tmp |= S3C2410_CLKCON_UART1;
0025     tmp |= S3C2410_CLKCON_UART2;
0026
0027     __raw_writel(tmp, S3C2410_CLKCON);
0028     udelay(10);
0029 #endif
0030 }
0031
0032 static inline void s3c_pm_arch_prepare_irqs(void)
0033 {
0034     __raw_writel(s3c_irqwake_intmask, S3C2410_INTMSK);
0035     __raw_writel(s3c_irqwake_eintmask, S3C2410_EINTMASK);
0036
0037     /* ack any outstanding external interrupts before we go to sleep */
0038
0039     __raw_writel(__raw_readl(S3C2410_EINTPEND), S3C2410_EINTPEND);
0040     __raw_writel(__raw_readl(S3C2410_INTPND), S3C2410_INTPND);
0041     __raw_writel(__raw_readl(S3C2410_SRCPND), S3C2410_SRCPND);
0042
0043 }
0044
0045 static inline void s3c_pm_arch_stop_clocks(void)
0046 {
0047     __raw_writel(0x00, S3C2410_CLKCON);  /* turn off clocks over sleep */
0048 }
0049
0050 /* s3c2410_pm_show_resume_irqs
0051  *
0052  * print any IRQs asserted at resume time (ie, we woke from)
0053 */
0054 static inline void s3c_pm_show_resume_irqs(int start, unsigned long which,
0055                        unsigned long mask)
0056 {
0057     int i;
0058
0059     which &= ~mask;
0060
0061     for (i = 0; i <= 31; i++) {
0062         if (which & (1L<<i)) {
0063             S3C_PMDBG("IRQ %d asserted at resume\n", start+i);
0064         }
0065     }
0066 }
0067
0068 static inline void s3c_pm_arch_show_resume_irqs(void)
0069 {
0070     S3C_PMDBG("post sleep: IRQs 0x%08x, 0x%08x\n",
0071           __raw_readl(S3C2410_SRCPND),
0072           __raw_readl(S3C2410_EINTPEND));
0073
0074     s3c_pm_show_resume_irqs(IRQ_EINT0, __raw_readl(S3C2410_SRCPND),
0075                 s3c_irqwake_intmask);
0076
0077     s3c_pm_show_resume_irqs(IRQ_EINT4-4, __raw_readl(S3C2410_EINTPEND),
0078                 s3c_irqwake_eintmask);
0079 }
0080
0081 static inline void s3c_pm_restored_gpios(void) { }
0082 static inline void samsung_pm_saved_gpios(void) { }
0083
0084 /* state for IRQs over sleep */
0085
0086 /* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
0087  *
0088  * set bit to 1 in allow bitfield to enable the wakeup settings on it
0089 */
0090 #ifdef CONFIG_PM_SLEEP
0091 #define s3c_irqwake_intallow    (1L << 30 | 0xfL)
0092 #define s3c_irqwake_eintallow   (0x0000fff0L)
0093 #else
0094 #define s3c_irqwake_eintallow 0
0095 #define s3c_irqwake_intallow  0
0096 #endif