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wifi: rtw89: introduce realtek ACPI DSM method

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Introduce realtek ACPI DSM method to get required BIOS
configurations. It will be used in the following commits.

And, enum rtw89_acpi_dsm_func is added for listing the functions
which are currently recognized.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230508081211.38760-2-pkshih@realtek.com
This commit is contained in:
Zong-Zhe Yang 2023-05-08 16:12:09 +08:00 committed by Kalle Valo
parent d9aef04fcf
commit e897b0bef3
3 changed files with 75 additions and 1 deletions
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3
drivers/net/wireless/realtek/rtw89/Makefile
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@ -13,7 +13,8 @@ rtw89_core-y += core.o \
coex.o \
ps.o \
chan.o \
ser.o
ser.o \
acpi.o
rtw89_core-$(CONFIG_PM) += wow.o

52
drivers/net/wireless/realtek/rtw89/acpi.c Normal file
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@ -0,0 +1,52 @@
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/* Copyright(c) 2021-2023 Realtek Corporation
*/
#include <linux/acpi.h>
#include <linux/uuid.h>
#include "acpi.h"
#include "debug.h"
static const guid_t rtw89_guid = GUID_INIT(0xD2A8C3E8, 0x4B69, 0x4F00,
0x82, 0xBD, 0xFE, 0x86,
0x07, 0x80, 0x3A, 0xA7);
static int rtw89_acpi_dsm_get(struct rtw89_dev *rtwdev, union acpi_object *obj,
u8 *value)
{
switch (obj->type) {
case ACPI_TYPE_INTEGER:
*value = (u8)obj->integer.value;
break;
case ACPI_TYPE_BUFFER:
*value = obj->buffer.pointer[0];
break;
default:
rtw89_debug(rtwdev, RTW89_DBG_UNEXP,
"acpi dsm return unhandled type: %d\n", obj->type);
return -EINVAL;
}
return 0;
}
int rtw89_acpi_evaluate_dsm(struct rtw89_dev *rtwdev,
enum rtw89_acpi_dsm_func func, u8 *value)
{
union acpi_object *obj;
int ret;
obj = acpi_evaluate_dsm(ACPI_HANDLE(rtwdev->dev), &rtw89_guid,
0, func, NULL);
if (!obj) {
rtw89_debug(rtwdev, RTW89_DBG_UNEXP,
"acpi dsm fail to evaluate func: %d\n", func);
return -ENOENT;
}
ret = rtw89_acpi_dsm_get(rtwdev, obj, value);
ACPI_FREE(obj);
return ret;
}

21
drivers/net/wireless/realtek/rtw89/acpi.h Normal file
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@ -0,0 +1,21 @@
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/* Copyright(c) 2021-2023 Realtek Corporation
*/
#ifndef __RTW89_ACPI_H__
#define __RTW89_ACPI_H__
#include "core.h"
enum rtw89_acpi_dsm_func {
RTW89_ACPI_DSM_FUNC_IDN_BAND_SUP = 2,
RTW89_ACPI_DSM_FUNC_6G_DIS = 3,
RTW89_ACPI_DSM_FUNC_6G_BP = 4,
RTW89_ACPI_DSM_FUNC_TAS_EN = 5,
RTW89_ACPI_DSM_FUNC_59G_EN = 6,
};
int rtw89_acpi_evaluate_dsm(struct rtw89_dev *rtwdev,
enum rtw89_acpi_dsm_func func, u8 *value);
#endif