1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Author: Huacai Chen <chenhuacai@loongson.cn>
 4 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
 5 */
 6#include <linux/acpi.h>
 7#include <linux/platform_device.h>
 8
 9#include <asm/bootinfo.h>
10#include <asm/loongson.h>
11
12void enable_gpe_wakeup(void)
13{
14	if (acpi_disabled)
15	       return;
16
17	if (acpi_gbl_reduced_hardware)
18	       return;
19
20	acpi_enable_all_wakeup_gpes();
21}
22
23void enable_pci_wakeup(void)
24{
25	if (acpi_disabled)
26	       return;
27
28	if (acpi_gbl_reduced_hardware)
29	       return;
30
31	acpi_write_bit_register(ACPI_BITREG_PCIEXP_WAKE_STATUS, 1);
32
33	if (acpi_gbl_FADT.flags & ACPI_FADT_PCI_EXPRESS_WAKE)
34		acpi_write_bit_register(ACPI_BITREG_PCIEXP_WAKE_DISABLE, 0);
35}
36
37static int __init loongson3_acpi_suspend_init(void)
38{
39#ifdef CONFIG_ACPI
40	acpi_status status;
41	uint64_t suspend_addr = 0;
42
43	if (acpi_disabled || acpi_gbl_reduced_hardware)
44		return 0;
45
46	acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
47	status = acpi_evaluate_integer(NULL, "\\SADR", NULL, &suspend_addr);
48	if (ACPI_FAILURE(status) || !suspend_addr) {
49		pr_err("ACPI S3 is not support!\n");
50		return -1;
51	}
52	loongson_sysconf.suspend_addr = (u64)phys_to_virt(PHYSADDR(suspend_addr));
53#endif
54	return 0;
55}
56
57device_initcall(loongson3_acpi_suspend_init);