105 lines
2.1 KiB
C
105 lines
2.1 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* loongson-specific suspend support
|
||
|
|
*
|
||
|
|
* Copyright (C) 2009 Lemote Inc.
|
||
|
|
* Author: Wu Zhangjin <wuzhangjin@gmail.com>
|
||
|
|
*/
|
||
|
|
#include <linux/suspend.h>
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <linux/pm.h>
|
||
|
|
|
||
|
|
#include <asm/i8259.h>
|
||
|
|
#include <asm/mipsregs.h>
|
||
|
|
|
||
|
|
#include <loongson.h>
|
||
|
|
|
||
|
|
static unsigned int __maybe_unused cached_master_mask; /* i8259A */
|
||
|
|
static unsigned int __maybe_unused cached_slave_mask;
|
||
|
|
static unsigned int __maybe_unused cached_bonito_irq_mask; /* bonito */
|
||
|
|
|
||
|
|
void arch_suspend_disable_irqs(void)
|
||
|
|
{
|
||
|
|
/* disable all mips events */
|
||
|
|
local_irq_disable();
|
||
|
|
|
||
|
|
#ifdef CONFIG_I8259
|
||
|
|
/* disable all events of i8259A */
|
||
|
|
cached_slave_mask = inb(PIC_SLAVE_IMR);
|
||
|
|
cached_master_mask = inb(PIC_MASTER_IMR);
|
||
|
|
|
||
|
|
outb(0xff, PIC_SLAVE_IMR);
|
||
|
|
inb(PIC_SLAVE_IMR);
|
||
|
|
outb(0xff, PIC_MASTER_IMR);
|
||
|
|
inb(PIC_MASTER_IMR);
|
||
|
|
#endif
|
||
|
|
/* disable all events of bonito */
|
||
|
|
cached_bonito_irq_mask = LOONGSON_INTEN;
|
||
|
|
LOONGSON_INTENCLR = 0xffff;
|
||
|
|
(void)LOONGSON_INTENCLR;
|
||
|
|
}
|
||
|
|
|
||
|
|
void arch_suspend_enable_irqs(void)
|
||
|
|
{
|
||
|
|
/* enable all mips events */
|
||
|
|
local_irq_enable();
|
||
|
|
#ifdef CONFIG_I8259
|
||
|
|
/* only enable the cached events of i8259A */
|
||
|
|
outb(cached_slave_mask, PIC_SLAVE_IMR);
|
||
|
|
outb(cached_master_mask, PIC_MASTER_IMR);
|
||
|
|
#endif
|
||
|
|
/* enable all cached events of bonito */
|
||
|
|
LOONGSON_INTENSET = cached_bonito_irq_mask;
|
||
|
|
(void)LOONGSON_INTENSET;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Setup the board-specific events for waking up loongson from wait mode
|
||
|
|
*/
|
||
|
|
void __weak setup_wakeup_events(void)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
void __weak mach_suspend(void)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
void __weak mach_resume(void)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static int loongson_pm_enter(suspend_state_t state)
|
||
|
|
{
|
||
|
|
mach_suspend();
|
||
|
|
|
||
|
|
mach_resume();
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int loongson_pm_valid_state(suspend_state_t state)
|
||
|
|
{
|
||
|
|
switch (state) {
|
||
|
|
case PM_SUSPEND_ON:
|
||
|
|
case PM_SUSPEND_STANDBY:
|
||
|
|
case PM_SUSPEND_MEM:
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct platform_suspend_ops loongson_pm_ops = {
|
||
|
|
.valid = loongson_pm_valid_state,
|
||
|
|
.enter = loongson_pm_enter,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init loongson_pm_init(void)
|
||
|
|
{
|
||
|
|
suspend_set_ops(&loongson_pm_ops);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
arch_initcall(loongson_pm_init);
|