Implemantation of Thermal HAL

Moving files from /device/qcom/common/thermal to
/hardware/qcom/thermal

Change-Id: If315bc13408756b672ec368ec29d5dc28897029a

1 files changed, 190 insertions, 0 deletions

diff --git a/thermal-8998.c b/thermal-8998.c
new file mode 100644
index 0000000..da7c69b
--- /dev/null
+++ b/thermal-8998.c
@@ -0,0 +1,190 @@
+/*
+ * 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) 
+{
+    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) 
+{
+    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) {
+    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;
+}