| 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 | |
| 12 | void 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 | |
| 23 | void 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, value: 1); |
| 32 | |
| 33 | if (acpi_gbl_FADT.flags & ACPI_FADT_PCI_EXPRESS_WAKE) |
| 34 | acpi_write_bit_register(ACPI_BITREG_PCIEXP_WAKE_DISABLE, value: 0); |
| 35 | } |
| 36 | |
| 37 | static 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, value: 1); |
| 47 | status = acpi_evaluate_integer(NULL, pathname: "\\SADR", NULL, data: &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 | |
| 57 | device_initcall(loongson3_acpi_suspend_init); |
| 58 |