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// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
* Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
* Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include "core.h"
#include "acpi.h"
#include "debug.h"
static int ath12k_acpi_dsm_get_data(struct ath12k_base *ab, int func)
{
union acpi_object *obj;
acpi_handle root_handle;
int ret;
root_handle = ACPI_HANDLE(ab->dev);
if (!root_handle) {
ath12k_dbg(ab, ATH12K_DBG_BOOT, "invalid acpi handler\n");
return -EOPNOTSUPP;
}
obj = acpi_evaluate_dsm(root_handle, ab->hw_params->acpi_guid, 0, func,
NULL);
if (!obj) {
ath12k_dbg(ab, ATH12K_DBG_BOOT, "acpi_evaluate_dsm() failed\n");
return -ENOENT;
}
if (obj->type == ACPI_TYPE_INTEGER) {
ab->acpi.func_bit = obj->integer.value;
} else if (obj->type == ACPI_TYPE_BUFFER) {
switch (func) {
case ATH12K_ACPI_DSM_FUNC_TAS_CFG:
if (obj->buffer.length != ATH12K_ACPI_DSM_TAS_CFG_SIZE) {
ath12k_warn(ab, "invalid ACPI DSM TAS config size: %d\n",
obj->buffer.length);
ret = -EINVAL;
goto out;
}
memcpy(&ab->acpi.tas_cfg, obj->buffer.pointer,
obj->buffer.length);
break;
case ATH12K_ACPI_DSM_FUNC_TAS_DATA:
if (obj->buffer.length != ATH12K_ACPI_DSM_TAS_DATA_SIZE) {
ath12k_warn(ab, "invalid ACPI DSM TAS data size: %d\n",
obj->buffer.length);
ret = -EINVAL;
goto out;
}
memcpy(&ab->acpi.tas_sar_power_table, obj->buffer.pointer,
obj->buffer.length);
break;
}
} else {
ath12k_warn(ab, "ACPI DSM method returned an unsupported object type: %d\n",
obj->type);
ret = -EINVAL;
goto out;
}
ret = 0;
out:
ACPI_FREE(obj);
return ret;
}
static int ath12k_acpi_set_power_limit(struct ath12k_base *ab)
{
const u8 *tas_sar_power_table = ab->acpi.tas_sar_power_table;
int ret;
if (tas_sar_power_table[0] != ATH12K_ACPI_TAS_DATA_VERSION ||
tas_sar_power_table[1] != ATH12K_ACPI_TAS_DATA_ENABLE) {
ath12k_warn(ab, "latest ACPI TAS data is invalid\n");
return -EINVAL;
}
ret = ath12k_wmi_set_bios_cmd(ab, WMI_BIOS_PARAM_TAS_DATA_TYPE,
tas_sar_power_table,
ATH12K_ACPI_DSM_TAS_DATA_SIZE);
if (ret) {
ath12k_warn(ab, "failed to send ACPI TAS data table: %d\n", ret);
return ret;
}
return ret;
}
static void ath12k_acpi_dsm_notify(acpi_handle handle, u32 event, void *data)
{
int ret;
struct ath12k_base *ab = data;
if (event == ATH12K_ACPI_NOTIFY_EVENT) {
ath12k_warn(ab, "unknown acpi notify %u\n", event);
return;
}
if (!ab->acpi.acpi_tas_enable) {
ath12k_dbg(ab, ATH12K_DBG_BOOT, "acpi_tas_enable is false\n");
return;
}
ret = ath12k_acpi_dsm_get_data(ab, ATH12K_ACPI_DSM_FUNC_TAS_DATA);
if (ret) {
ath12k_warn(ab, "failed to update ACPI TAS data table: %d\n", ret);
return;
}
ret = ath12k_acpi_set_power_limit(ab);
if (ret) {
ath12k_warn(ab, "failed to set ACPI TAS power limit data: %d", ret);
return;
}
}
static int ath12k_acpi_set_tas_params(struct ath12k_base *ab)
{
int ret;
ret = ath12k_wmi_set_bios_cmd(ab, WMI_BIOS_PARAM_TAS_CONFIG_TYPE,
ab->acpi.tas_cfg,
ATH12K_ACPI_DSM_TAS_CFG_SIZE);
if (ret) {
ath12k_warn(ab, "failed to send ACPI TAS config table parameter: %d\n",
ret);
return ret;
}
ret = ath12k_wmi_set_bios_cmd(ab, WMI_BIOS_PARAM_TAS_DATA_TYPE,
ab->acpi.tas_sar_power_table,
ATH12K_ACPI_DSM_TAS_DATA_SIZE);
if (ret) {
ath12k_warn(ab, "failed to send ACPI TAS data table parameter: %d\n",
ret);
return ret;
}
return 0;
}
int ath12k_acpi_start(struct ath12k_base *ab)
{
acpi_status status;
int ret;
if (!ab->hw_params->acpi_guid)
/* not supported with this hardware */
return 0;
ab->acpi.acpi_tas_enable = false;
ret = ath12k_acpi_dsm_get_data(ab, ATH12K_ACPI_DSM_FUNC_SUPPORT_FUNCS);
if (ret) {
ath12k_dbg(ab, ATH12K_DBG_BOOT, "failed to get ACPI DSM data: %d\n", ret);
return ret;
}
if (ATH12K_ACPI_FUNC_BIT_VALID(ab->acpi, ATH12K_ACPI_FUNC_BIT_TAS_CFG)) {
ret = ath12k_acpi_dsm_get_data(ab, ATH12K_ACPI_DSM_FUNC_TAS_CFG);
if (ret) {
ath12k_warn(ab, "failed to get ACPI TAS config table: %d\n", ret);
return ret;
}
}
if (ATH12K_ACPI_FUNC_BIT_VALID(ab->acpi, ATH12K_ACPI_FUNC_BIT_TAS_DATA)) {
ret = ath12k_acpi_dsm_get_data(ab, ATH12K_ACPI_DSM_FUNC_TAS_DATA);
if (ret) {
ath12k_warn(ab, "failed to get ACPI TAS data table: %d\n", ret);
return ret;
}
if (ATH12K_ACPI_FUNC_BIT_VALID(ab->acpi, ATH12K_ACPI_FUNC_BIT_TAS_CFG) &&
ab->acpi.tas_sar_power_table[0] == ATH12K_ACPI_TAS_DATA_VERSION &&
ab->acpi.tas_sar_power_table[1] == ATH12K_ACPI_TAS_DATA_ENABLE)
ab->acpi.acpi_tas_enable = true;
}
if (ab->acpi.acpi_tas_enable) {
ret = ath12k_acpi_set_tas_params(ab);
if (ret) {
ath12k_warn(ab, "failed to send ACPI parameters: %d\n", ret);
return ret;
}
}
status = acpi_install_notify_handler(ACPI_HANDLE(ab->dev),
ACPI_DEVICE_NOTIFY,
ath12k_acpi_dsm_notify, ab);
if (ACPI_FAILURE(status)) {
ath12k_warn(ab, "failed to install DSM notify callback: %d\n", status);
return -EIO;
}
ab->acpi.started = true;
return 0;
}
void ath12k_acpi_stop(struct ath12k_base *ab)
{
if (!ab->acpi.started)
return;
acpi_remove_notify_handler(ACPI_HANDLE(ab->dev),
ACPI_DEVICE_NOTIFY,
ath12k_acpi_dsm_notify);
}
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