1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright 2008 Simtec Electronics
4 *      Ben Dooks <ben@simtec.co.uk>
5 *      http://armlinux.simtec.co.uk/
6 *
7 * S3C24xx - PM core support for arch/arm/plat-s3c/pm.c
8 */
9
10#include <linux/delay.h>
11#include <linux/io.h>
12
13#include "regs-clock.h"
14#include "regs-irq-s3c24xx.h"
15#include <mach/irqs.h>
16
17static inline void s3c_pm_debug_init_uart(void)
18{
19#ifdef CONFIG_SAMSUNG_PM_DEBUG
20	unsigned long tmp = __raw_readl(S3C2410_CLKCON);
21
22	/* re-start uart clocks */
23	tmp |= S3C2410_CLKCON_UART0;
24	tmp |= S3C2410_CLKCON_UART1;
25	tmp |= S3C2410_CLKCON_UART2;
26
27	__raw_writel(tmp, S3C2410_CLKCON);
28	udelay(10);
29#endif
30}
31
32static inline void s3c_pm_arch_prepare_irqs(void)
33{
34	__raw_writel(s3c_irqwake_intmask, S3C2410_INTMSK);
35	__raw_writel(s3c_irqwake_eintmask, S3C2410_EINTMASK);
36
37	/* ack any outstanding external interrupts before we go to sleep */
38
39	__raw_writel(__raw_readl(S3C2410_EINTPEND), S3C2410_EINTPEND);
40	__raw_writel(__raw_readl(S3C2410_INTPND), S3C2410_INTPND);
41	__raw_writel(__raw_readl(S3C2410_SRCPND), S3C2410_SRCPND);
42
43}
44
45static inline void s3c_pm_arch_stop_clocks(void)
46{
47	__raw_writel(0x00, S3C2410_CLKCON);  /* turn off clocks over sleep */
48}
49
50/* s3c2410_pm_show_resume_irqs
51 *
52 * print any IRQs asserted at resume time (ie, we woke from)
53*/
54static inline void s3c_pm_show_resume_irqs(int start, unsigned long which,
55					   unsigned long mask)
56{
57	int i;
58
59	which &= ~mask;
60
61	for (i = 0; i <= 31; i++) {
62		if (which & (1L<<i)) {
63			S3C_PMDBG("IRQ %d asserted at resume\n", start+i);
64		}
65	}
66}
67
68static inline void s3c_pm_arch_show_resume_irqs(void)
69{
70	S3C_PMDBG("post sleep: IRQs 0x%08x, 0x%08x\n",
71		  __raw_readl(S3C2410_SRCPND),
72		  __raw_readl(S3C2410_EINTPEND));
73
74	s3c_pm_show_resume_irqs(IRQ_EINT0, __raw_readl(S3C2410_SRCPND),
75				s3c_irqwake_intmask);
76
77	s3c_pm_show_resume_irqs(IRQ_EINT4-4, __raw_readl(S3C2410_EINTPEND),
78				s3c_irqwake_eintmask);
79}
80
81static inline void s3c_pm_restored_gpios(void) { }
82static inline void samsung_pm_saved_gpios(void) { }
83
84/* state for IRQs over sleep */
85
86/* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
87 *
88 * set bit to 1 in allow bitfield to enable the wakeup settings on it
89*/
90#ifdef CONFIG_PM_SLEEP
91#define s3c_irqwake_intallow	(1L << 30 | 0xfL)
92#define s3c_irqwake_eintallow	(0x0000fff0L)
93#else
94#define s3c_irqwake_eintallow 0
95#define s3c_irqwake_intallow  0
96#endif
97