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/*
* Copyright (c) 2017, The Linux Foundation. All rights reserved.
* Not a contribution
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <ctype.h>
#include <errno.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#define LOG_TAG "ThermalHAL-8998"
#include <utils/Log.h>
#include <hardware/hardware.h>
#include <hardware/thermal.h>
#define MAX_LENGTH 50
#define TEMPERATURE_FILE_FORMAT "/sys/class/thermal/thermal_zone%d/temp"
#define BATTERY_SENSOR_NUM 0
#define GPU_SENSOR_NUM 17
#define SKIN_SENSOR_NUM 5
const int CPU_SENSORS[] = {8, 9, 10, 11, 12, 13, 14,15};
#define CPU_NUM (sizeof(CPU_SENSORS) / sizeof(int))
// Sum of CPU_NUM + 3 for GPU, BATTERY, and SKIN.
#define TEMPERATURE_NUM (CPU_NUM + 3)
//therm-reset-temp
#define CPU_SHUTDOWN_THRESHOLD 115
//limit-temp
#define CPU_THROTTLING_THRESHOLD 60
#define BATTERY_SHUTDOWN_THRESHOLD 60
//must match thermal-engine.conf
#define SKIN_THROTTLING_THRESHOLD 44
#define SKIN_SHUTDOWN_THRESHOLD 70
#define VR_THROTTLED_BELOW_MIN 58
#define GPU_LABEL "GPU"
#define BATTERY_LABEL "battery"
#define SKIN_LABEL "skin"
const char *CPU_LABEL[] = {"CPU0", "CPU1", "CPU2", "CPU3", "CPU4", "CPU5", "CPU6", "CPU7"};
const char *get_cpu_label(unsigned int cpu_num) {
if(cpu_num >= CPU_NUM)
return NULL;
return CPU_LABEL[cpu_num];
}
size_t get_num_cpus() {
return CPU_NUM;
}
/**
* Reads device temperature.
*
* @param sensor_num Number of sensor file with temperature.
* @param type Device temperature type.
* @param name Device temperature name.
* @param mult Multiplier used to translate temperature to Celsius.
* @param throttling_threshold Throttling threshold for the temperature.
* @param shutdown_threshold Shutdown threshold for the temperature.
* @param out Pointer to temperature_t structure that will be filled with current
* values.
*
* @return 0 on success or negative value -errno on error.
*/
static ssize_t read_temperature(int sensor_num, int type, const char *name, float mult,
float throttling_threshold, float shutdown_threshold, float vr_throttling_threshold,
temperature_t *out)
{
ALOGD("Entering %s",__func__);
FILE *file;
char file_name[MAX_LENGTH];
float temp;
snprintf(file_name, sizeof(file_name), TEMPERATURE_FILE_FORMAT, sensor_num);
file = fopen(file_name, "r");
if (file == NULL) {
ALOGE("%s: failed to open: %s", __func__, strerror(errno));
return -errno;
}
if (1 != fscanf(file, "%f", &temp)) {
fclose(file);
ALOGE("%s: failed to read a float: %s", __func__, strerror(errno));
return errno ? -errno : -EIO;
}
fclose(file);
(*out) = (temperature_t) {
.type = type,
.name = name,
.current_value = temp * mult,
.throttling_threshold = throttling_threshold,
.shutdown_threshold = shutdown_threshold,
.vr_throttling_threshold = vr_throttling_threshold
};
return 0;
}
static ssize_t get_cpu_temperatures(temperature_t *list, size_t size)
{
ALOGD("Entering %s",__func__);
size_t cpu;
for (cpu = 0; cpu < CPU_NUM; cpu++) {
if (cpu >= size) {
break;
}
// tsens_tz_sensor[4,6,9,11]: temperature in decidegrees Celsius.
ssize_t result = read_temperature(CPU_SENSORS[cpu], DEVICE_TEMPERATURE_CPU, CPU_LABEL[cpu],
0.1, CPU_THROTTLING_THRESHOLD, CPU_SHUTDOWN_THRESHOLD, UNKNOWN_TEMPERATURE,
&list[cpu]);
if (result != 0) {
return result;
}
}
return cpu;
}
ssize_t get_temperatures(thermal_module_t *module, temperature_t *list, size_t size) {
ALOGD("Entering %s",__func__);
ssize_t result = 0;
size_t current_index = 0;
if (list == NULL) {
return TEMPERATURE_NUM;
}
result = get_cpu_temperatures(list, size);
if (result < 0) {
return result;
}
current_index += result;
// GPU temperature.
if (current_index < size) {
// tsens_tz_sensor14: temperature in decidegrees Celsius.
result = read_temperature(GPU_SENSOR_NUM, DEVICE_TEMPERATURE_GPU, GPU_LABEL, 0.1,
UNKNOWN_TEMPERATURE, UNKNOWN_TEMPERATURE, UNKNOWN_TEMPERATURE,
&list[current_index]);
if (result < 0) {
return result;
}
current_index++;
}
// Battery temperature.
if (current_index < size) {
// tsens_tz_sensor29: battery: temperature in millidegrees Celsius.
result = read_temperature(BATTERY_SENSOR_NUM, DEVICE_TEMPERATURE_BATTERY, BATTERY_LABEL,
0.001, UNKNOWN_TEMPERATURE, BATTERY_SHUTDOWN_THRESHOLD, UNKNOWN_TEMPERATURE,
&list[current_index]);
if (result < 0) {
return result;
}
current_index++;
}
// Skin temperature.
if (current_index < size) {
// tsens_tz_sensor24: temperature in Celsius.
result = read_temperature(SKIN_SENSOR_NUM, DEVICE_TEMPERATURE_SKIN, SKIN_LABEL, 1.,
SKIN_THROTTLING_THRESHOLD, SKIN_SHUTDOWN_THRESHOLD, VR_THROTTLED_BELOW_MIN,
&list[current_index]);
if (result < 0) {
return result;
}
current_index++;
}
return TEMPERATURE_NUM;
}
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