162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 262306a36Sopenharmony_ci/* Copyright(c) 2021-2023 Realtek Corporation 362306a36Sopenharmony_ci */ 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci#include <linux/acpi.h> 662306a36Sopenharmony_ci#include <linux/uuid.h> 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci#include "acpi.h" 962306a36Sopenharmony_ci#include "debug.h" 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_cistatic const guid_t rtw89_guid = GUID_INIT(0xD2A8C3E8, 0x4B69, 0x4F00, 1262306a36Sopenharmony_ci 0x82, 0xBD, 0xFE, 0x86, 1362306a36Sopenharmony_ci 0x07, 0x80, 0x3A, 0xA7); 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_cistatic int rtw89_acpi_dsm_get(struct rtw89_dev *rtwdev, union acpi_object *obj, 1662306a36Sopenharmony_ci u8 *value) 1762306a36Sopenharmony_ci{ 1862306a36Sopenharmony_ci switch (obj->type) { 1962306a36Sopenharmony_ci case ACPI_TYPE_INTEGER: 2062306a36Sopenharmony_ci *value = (u8)obj->integer.value; 2162306a36Sopenharmony_ci break; 2262306a36Sopenharmony_ci case ACPI_TYPE_BUFFER: 2362306a36Sopenharmony_ci *value = obj->buffer.pointer[0]; 2462306a36Sopenharmony_ci break; 2562306a36Sopenharmony_ci default: 2662306a36Sopenharmony_ci rtw89_debug(rtwdev, RTW89_DBG_UNEXP, 2762306a36Sopenharmony_ci "acpi dsm return unhandled type: %d\n", obj->type); 2862306a36Sopenharmony_ci return -EINVAL; 2962306a36Sopenharmony_ci } 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_ci return 0; 3262306a36Sopenharmony_ci} 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ciint rtw89_acpi_evaluate_dsm(struct rtw89_dev *rtwdev, 3562306a36Sopenharmony_ci enum rtw89_acpi_dsm_func func, u8 *value) 3662306a36Sopenharmony_ci{ 3762306a36Sopenharmony_ci union acpi_object *obj; 3862306a36Sopenharmony_ci int ret; 3962306a36Sopenharmony_ci 4062306a36Sopenharmony_ci obj = acpi_evaluate_dsm(ACPI_HANDLE(rtwdev->dev), &rtw89_guid, 4162306a36Sopenharmony_ci 0, func, NULL); 4262306a36Sopenharmony_ci if (!obj) { 4362306a36Sopenharmony_ci rtw89_debug(rtwdev, RTW89_DBG_UNEXP, 4462306a36Sopenharmony_ci "acpi dsm fail to evaluate func: %d\n", func); 4562306a36Sopenharmony_ci return -ENOENT; 4662306a36Sopenharmony_ci } 4762306a36Sopenharmony_ci 4862306a36Sopenharmony_ci ret = rtw89_acpi_dsm_get(rtwdev, obj, value); 4962306a36Sopenharmony_ci 5062306a36Sopenharmony_ci ACPI_FREE(obj); 5162306a36Sopenharmony_ci return ret; 5262306a36Sopenharmony_ci} 53