162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * Author: Huacai Chen <chenhuacai@loongson.cn> 462306a36Sopenharmony_ci * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 562306a36Sopenharmony_ci */ 662306a36Sopenharmony_ci#include <linux/acpi.h> 762306a36Sopenharmony_ci#include <linux/platform_device.h> 862306a36Sopenharmony_ci 962306a36Sopenharmony_ci#include <asm/bootinfo.h> 1062306a36Sopenharmony_ci#include <asm/loongson.h> 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_civoid enable_gpe_wakeup(void) 1362306a36Sopenharmony_ci{ 1462306a36Sopenharmony_ci if (acpi_disabled) 1562306a36Sopenharmony_ci return; 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ci if (acpi_gbl_reduced_hardware) 1862306a36Sopenharmony_ci return; 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ci acpi_enable_all_wakeup_gpes(); 2162306a36Sopenharmony_ci} 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_civoid enable_pci_wakeup(void) 2462306a36Sopenharmony_ci{ 2562306a36Sopenharmony_ci if (acpi_disabled) 2662306a36Sopenharmony_ci return; 2762306a36Sopenharmony_ci 2862306a36Sopenharmony_ci if (acpi_gbl_reduced_hardware) 2962306a36Sopenharmony_ci return; 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_ci acpi_write_bit_register(ACPI_BITREG_PCIEXP_WAKE_STATUS, 1); 3262306a36Sopenharmony_ci 3362306a36Sopenharmony_ci if (acpi_gbl_FADT.flags & ACPI_FADT_PCI_EXPRESS_WAKE) 3462306a36Sopenharmony_ci acpi_write_bit_register(ACPI_BITREG_PCIEXP_WAKE_DISABLE, 0); 3562306a36Sopenharmony_ci} 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_cistatic int __init loongson3_acpi_suspend_init(void) 3862306a36Sopenharmony_ci{ 3962306a36Sopenharmony_ci#ifdef CONFIG_ACPI 4062306a36Sopenharmony_ci acpi_status status; 4162306a36Sopenharmony_ci uint64_t suspend_addr = 0; 4262306a36Sopenharmony_ci 4362306a36Sopenharmony_ci if (acpi_disabled || acpi_gbl_reduced_hardware) 4462306a36Sopenharmony_ci return 0; 4562306a36Sopenharmony_ci 4662306a36Sopenharmony_ci acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); 4762306a36Sopenharmony_ci status = acpi_evaluate_integer(NULL, "\\SADR", NULL, &suspend_addr); 4862306a36Sopenharmony_ci if (ACPI_FAILURE(status) || !suspend_addr) { 4962306a36Sopenharmony_ci pr_err("ACPI S3 is not support!\n"); 5062306a36Sopenharmony_ci return -1; 5162306a36Sopenharmony_ci } 5262306a36Sopenharmony_ci loongson_sysconf.suspend_addr = (u64)phys_to_virt(PHYSADDR(suspend_addr)); 5362306a36Sopenharmony_ci#endif 5462306a36Sopenharmony_ci return 0; 5562306a36Sopenharmony_ci} 5662306a36Sopenharmony_ci 5762306a36Sopenharmony_cidevice_initcall(loongson3_acpi_suspend_init); 58