Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Jiaxun Yang | 303 | 79.32% | 2 | 20.00% |
Wu Zhangjin | 78 | 20.42% | 7 | 70.00% |
Thomas Gleixner | 1 | 0.26% | 1 | 10.00% |
Total | 382 | 10 |
// 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) { } /* * Check wakeup events */ int __weak wakeup_loongson(void) { return 1; } /* * If the events are really what we want to wakeup the CPU, wake it up * otherwise put the CPU asleep again. */ static void wait_for_wakeup_events(void) { while (!wakeup_loongson()) writel(readl(LOONGSON_CHIPCFG) & ~0x7, LOONGSON_CHIPCFG); } /* * Stop all perf counters * * $24 is the control register of Loongson perf counter */ static inline void stop_perf_counters(void) { __write_64bit_c0_register($24, 0, 0); } static void loongson_suspend_enter(void) { unsigned int cached_cpu_freq; /* setup wakeup events via enabling the IRQs */ setup_wakeup_events(); stop_perf_counters(); cached_cpu_freq = readl(LOONGSON_CHIPCFG); /* Put CPU into wait mode */ writel(readl(LOONGSON_CHIPCFG) & ~0x7, LOONGSON_CHIPCFG); /* wait for the given events to wakeup cpu from wait mode */ wait_for_wakeup_events(); writel(cached_cpu_freq, LOONGSON_CHIPCFG); mmiowb(); } void __weak mach_suspend(void) { } void __weak mach_resume(void) { } static int loongson_pm_enter(suspend_state_t state) { mach_suspend(); /* processor specific suspend */ loongson_suspend_enter(); 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);
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