^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * loongson-specific suspend support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2009 Lemote Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Wu Zhangjin <wuzhangjin@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/suspend.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/i8259.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/mipsregs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <loongson.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static unsigned int __maybe_unused cached_master_mask; /* i8259A */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static unsigned int __maybe_unused cached_slave_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static unsigned int __maybe_unused cached_bonito_irq_mask; /* bonito */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) void arch_suspend_disable_irqs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /* disable all mips events */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #ifdef CONFIG_I8259
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /* disable all events of i8259A */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) cached_slave_mask = inb(PIC_SLAVE_IMR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) cached_master_mask = inb(PIC_MASTER_IMR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) outb(0xff, PIC_SLAVE_IMR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) inb(PIC_SLAVE_IMR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) outb(0xff, PIC_MASTER_IMR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) inb(PIC_MASTER_IMR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) /* disable all events of bonito */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) cached_bonito_irq_mask = LOONGSON_INTEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) LOONGSON_INTENCLR = 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) (void)LOONGSON_INTENCLR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) void arch_suspend_enable_irqs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* enable all mips events */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #ifdef CONFIG_I8259
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /* only enable the cached events of i8259A */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) outb(cached_slave_mask, PIC_SLAVE_IMR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) outb(cached_master_mask, PIC_MASTER_IMR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /* enable all cached events of bonito */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) LOONGSON_INTENSET = cached_bonito_irq_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) (void)LOONGSON_INTENSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * Setup the board-specific events for waking up loongson from wait mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) void __weak setup_wakeup_events(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) void __weak mach_suspend(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) void __weak mach_resume(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static int loongson_pm_enter(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) mach_suspend();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) mach_resume();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static int loongson_pm_valid_state(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) switch (state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) case PM_SUSPEND_ON:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) case PM_SUSPEND_STANDBY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) case PM_SUSPEND_MEM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static const struct platform_suspend_ops loongson_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .valid = loongson_pm_valid_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .enter = loongson_pm_enter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static int __init loongson_pm_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) suspend_set_ops(&loongson_pm_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) arch_initcall(loongson_pm_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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