From: Zong-Zhe Yang <kevin_yang@xxxxxxxxxxx>
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@xxxxxxxxxxx>
Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
---
drivers/net/wireless/realtek/rtw89/Makefile | 3 +-
drivers/net/wireless/realtek/rtw89/acpi.c | 52 +++++++++++++++++++++
drivers/net/wireless/realtek/rtw89/acpi.h | 21 +++++++++
3 files changed, 75 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/wireless/realtek/rtw89/acpi.c
create mode 100644 drivers/net/wireless/realtek/rtw89/acpi.h
diff --git a/drivers/net/wireless/realtek/rtw89/Makefile b/drivers/net/wireless/realtek/rtw89/Makefile
index 2dc48fa10c6b6..99e870d6a7d7d 100644
--- a/drivers/net/wireless/realtek/rtw89/Makefile
+++ b/drivers/net/wireless/realtek/rtw89/Makefile
@@ -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
diff --git a/drivers/net/wireless/realtek/rtw89/acpi.c b/drivers/net/wireless/realtek/rtw89/acpi.c
new file mode 100644
index 0000000000000..8aaf83a2a6b48
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw89/acpi.c
@@ -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;
+}
diff --git a/drivers/net/wireless/realtek/rtw89/acpi.h b/drivers/net/wireless/realtek/rtw89/acpi.h
new file mode 100644
index 0000000000000..ed74d8ceb7339
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw89/acpi.h
@@ -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
--
2.25.1
