Add thermal module for device_thermal_get_temperature

Change-Id: I575d6402d823ea1e53f738772b1ff3457603d54b
Signed-off-by: lokilee73 <changjoo.lee@samsung.com>

3 files changed, 176 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b7983c5..7f1ff58 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,3 +6,4 @@ SET(PREFIX ${CMAKE_INSTALL_PREFIX})
 ADD_SUBDIRECTORY(hw/display)
 ADD_SUBDIRECTORY(hw/led)
 ADD_SUBDIRECTORY(hw/touchscreen)
+ADD_SUBDIRECTORY(hw/thermal)
\ No newline at end of file
diff --git a/hw/thermal/CMakeLists.txt b/hw/thermal/CMakeLists.txt
new file mode 100644
index 0000000..42bcc20
--- /dev/null
+++ b/hw/thermal/CMakeLists.txt
@@ -0,0 +1,19 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
+PROJECT(thermal C)
+
+SET(PREFIX ${CMAKE_INSTALL_PREFIX})
+
+INCLUDE(FindPkgConfig)
+pkg_check_modules(thermal_pkgs REQUIRED hwcommon dlog glib-2.0 libudev)
+
+FOREACH(flag ${thermal_pkgs_CFLAGS})
+	SET(EXTRA_CFLAGS "${EXTRA_CFLAGS} ${flag}")
+ENDFOREACH(flag)
+
+SET(EXTRA_CFLAGS "${EXTRA_CFLAGS} -fvisibility=hidden")
+SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_CFLAGS}")
+
+ADD_LIBRARY(${PROJECT_NAME} MODULE thermal.c ../udev.c)
+TARGET_LINK_LIBRARIES(${PROJECT_NAME} ${thermal_pkgs_LDFLAGS})
+SET_TARGET_PROPERTIES(${PROJECT_NAME} PROPERTIES PREFIX "")
+INSTALL(TARGETS ${PROJECT_NAME} DESTINATION ${LIB_INSTALL_DIR}/hw COMPONENT RuntimeLibraries)
diff --git a/hw/thermal/thermal.c b/hw/thermal/thermal.c
new file mode 100644
index 0000000..10eaea4
--- /dev/null
+++ b/hw/thermal/thermal.c
@@ -0,0 +1,156 @@
+/*
+ * device-node
+ *
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd.
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <glib.h>
+
+#include <hw/thermal.h>
+#include <hw/shared.h>
+
+#define AP_PATH		"/sys/class/thermal/thermal_zone0/temp"
+
+static struct event_data {
+	ThermalUpdated updated_cb;
+	void *data;
+} edata = { 0, };
+
+static guint timer;
+
+static int thermal_get_info(device_thermal_e type, struct thermal_info *info)
+{
+	FILE *fp;
+	char buf[32];
+	size_t len;
+
+	if (!info)
+		return -EINVAL;
+
+	fp = fopen(AP_PATH, "r");
+	if (!fp) {
+		_E("Failed to open thermal path(%d)", errno);
+		return -errno;
+	}
+
+	len = fread(buf, 1, sizeof(buf) - 1, fp);
+	fclose(fp);
+	if (len == 0) {
+		_E("Failed to read thermal value(%d)", errno);
+		return -errno;
+	}
+	buf[len] = '\0';
+	info->temp = atoi(buf);
+	info->temp /= 1000;
+	info->adc = 0;
+
+	_I("temp(%d) adc(%d)", info->temp, info->adc);
+	return 0;
+}
+
+static gboolean thermal_timeout(gpointer data)
+{
+	struct thermal_info info;
+	int ret;
+
+	ret = thermal_get_info(DEVICE_THERMAL_AP, &info);
+	if (ret < 0) {
+		_E("Failed to read thermal info (%d)", ret);
+		return G_SOURCE_CONTINUE;
+	}
+
+	if (edata.updated_cb)
+		edata.updated_cb(&info, edata.data);
+
+	return G_SOURCE_CONTINUE;
+}
+
+static int thermal_register_changed_event(ThermalUpdated updated_cb, void *data)
+{
+	if (timer)
+		g_source_remove(timer);
+
+	timer = g_timeout_add(10000, thermal_timeout, NULL);
+	if (timer == 0) {
+		_E("Failed to add timer for thermal");
+		return -ENOENT;
+	}
+
+	edata.updated_cb = updated_cb;
+	edata.data = data;
+
+	return 0;
+}
+
+static int thermal_unregister_changed_event(ThermalUpdated updated_cb)
+{
+	if (timer) {
+		g_source_remove(timer);
+		timer = 0;
+	}
+
+	edata.updated_cb = NULL;
+	edata.data = NULL;
+
+	return 0;
+}
+
+static int thermal_open(struct hw_info *info,
+		const char *id, struct hw_common **common)
+{
+	struct thermal_device *thermal_dev;
+
+	if (!info || !common)
+		return -EINVAL;
+
+	thermal_dev = calloc(1, sizeof(struct thermal_device));
+	if (!thermal_dev)
+		return -ENOMEM;
+
+	thermal_dev->common.info = info;
+	thermal_dev->register_changed_event
+		= thermal_register_changed_event;
+	thermal_dev->unregister_changed_event
+		= thermal_unregister_changed_event;
+	thermal_dev->get_info
+		= thermal_get_info;
+
+	*common = (struct hw_common *)thermal_dev;
+	return 0;
+}
+
+static int thermal_close(struct hw_common *common)
+{
+	if (!common)
+		return -EINVAL;
+
+	free(common);
+	return 0;
+}
+
+HARDWARE_MODULE_STRUCTURE = {
+	.magic = HARDWARE_INFO_TAG,
+	.hal_version = HARDWARE_INFO_VERSION,
+	.device_version = THERMAL_HARDWARE_DEVICE_VERSION,
+	.id = THERMAL_HARDWARE_DEVICE_ID,
+	.name = "thermal",
+	.open = thermal_open,
+	.close = thermal_close,
+};