HAL: Add backlight HAL structureHEADtizen

It support to controll brightness and mode(manual, sensor)

Signed-off-by: Jiyoung Yun <jy910.yun@samsung.com>
Change-Id: If17d807df3db67442bcb8792d74fdf1f8faaa5aa

5 files changed, 338 insertions, 1 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c51d52f..f336110 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,7 +16,7 @@ SET(CMAKE_C_FLAGS_DEBUG "-O0 -g")
 SET(CMAKE_C_FLAGS_RELEASE "-O2")
 
 INCLUDE(FindPkgConfig)
-pkg_check_modules(pkgs REQUIRED devman_plugin)
+pkg_check_modules(pkgs REQUIRED devman_plugin hwcommon)
 
 FOREACH(flag ${pkgs_CFLAGS})
 	SET(EXTRA_CFLAGS "${EXTRA_CFLAGS} ${flag}")
@@ -31,3 +31,7 @@ TARGET_LINK_LIBRARIES(${PROJECT_NAME} ${pkgs_LDFLAGS})
 SET(PREFIX ${CMAKE_INSTALL_PREFIX})
 
 INSTALL(TARGETS ${PROJECT_NAME} DESTINATION lib COMPONENT RuntimeLibraries)
+
+ADD_LIBRARY(backlight MODULE hw/backlight.c hw/shared.c)
+SET_TARGET_PROPERTIES(backlight PROPERTIES PREFIX "")
+INSTALL(TARGETS backlight DESTINATION lib/hw COMPONENT RuntimeLibraries)
diff --git a/hw/backlight.c b/hw/backlight.c
new file mode 100644
index 0000000..43763ed
--- /dev/null
+++ b/hw/backlight.c
@@ -0,0 +1,157 @@
+/*
+ * device-node
+ *
+ * Copyright (c) 2015 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 <linux/limits.h>
+
+#include <hw/backlight.h>
+#include "shared.h"
+
+#ifndef BACKLIGHT_PATH
+#define BACKLIGHT_PATH	"/sys/class/backlight/s6e8aa0-bl"
+#endif
+
+static int get_max_brightness(int *val)
+{
+	static int max = -1;
+	int r;
+
+	if (!val)
+		return -EINVAL;
+
+	if (max < 0) {
+		r = sys_get_int(BACKLIGHT_PATH"/max_brightness", &max);
+		if (r < 0)
+			return r;
+	}
+
+	*val = max;
+	return 0;
+}
+
+static int backlight_get_brightness(int *brightness)
+{
+	int r, v;
+
+	if (!brightness) {
+		_E("wrong parameter");
+		return -EINVAL;
+	}
+
+	r = sys_get_int(BACKLIGHT_PATH"/brightness", &v);
+	if (r < 0) {
+		_E("fail to get brightness : %s", strerror(r));
+		return r;
+	}
+
+	*brightness = v;
+	return 0;
+}
+
+static int backlight_set_brightness(int brightness)
+{
+	int r, v, max;
+
+	if (brightness < 0 || brightness > 100) {
+		_E("wrong parameter");
+		return -EINVAL;
+	}
+
+	r = get_max_brightness(&max);
+	if (r < 0) {
+		_E("fail to get max brightness : %s", strerror(r));
+		return r;
+	}
+
+	v = brightness/100.f*max;
+	r = sys_set_int(BACKLIGHT_PATH"/brightness", v);
+	if (r < 0) {
+		_E("fail to set brightness : %s", strerror(r));
+		return r;
+	}
+
+	return 0;
+}
+
+static int backlight_get_mode(enum backlight_mode *mode)
+{
+	if (!mode) {
+		_E("wrong parameter");
+		return -EINVAL;
+	}
+
+	*mode = BACKLIGHT_MANUAL;
+	return 0;
+}
+
+static int backlight_set_mode(enum backlight_mode mode)
+{
+	if (mode == BACKLIGHT_SENSOR) {
+		_E("not supported option");
+		return -ENOTSUP;
+	}
+
+	return 0;
+}
+
+static int backlight_open(struct hw_info *info,
+		const char *id, struct hw_common **common)
+{
+	struct backlight_device *backlight_dev;
+
+	if (!info || !common)
+		return -EINVAL;
+
+	backlight_dev = calloc(1, sizeof(struct backlight_device));
+	if (!backlight_dev)
+		return -ENOMEM;
+
+	backlight_dev->common.info = info;
+	backlight_dev->get_brightness = backlight_get_brightness;
+	backlight_dev->set_brightness = backlight_set_brightness;
+	backlight_dev->get_mode = backlight_get_mode;
+	backlight_dev->set_mode = backlight_set_mode;
+
+	*common = (struct hw_common *)backlight_dev;
+	return 0;
+}
+
+static int backlight_close(struct hw_common *common)
+{
+	if (!common)
+		return -EINVAL;
+
+	free(common);
+	return 0;
+}
+
+EXPORT
+struct hw_info HARDWARE_INFO_SYM = {
+	.magic = HARDWARE_INFO_TAG,
+	.hal_version = HARDWARE_INFO_VERSION,
+	.device_version = BACKLIGHT_HARDWARE_DEVICE_VERSION,
+	.id = BACKLIGHT_HARDWARE_DEVICE_ID,
+	.name = "Default Backlight",
+	.author = "Jiyoung Yun <jy910.yun@samsung.com>",
+	.open = backlight_open,
+	.close = backlight_close,
+};
diff --git a/hw/shared.c b/hw/shared.c
new file mode 100644
index 0000000..b6401c1
--- /dev/null
+++ b/hw/shared.c
@@ -0,0 +1,129 @@
+/*
+ * device-node
+ *
+ * Copyright (c) 2015 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 <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#define BUF_MAX		255
+
+static int sys_read_buf(char *file, char *buf, int len)
+{
+	int fd, r;
+
+	if (!file || !buf || len < 0)
+		return -EINVAL;
+
+	fd = open(file, O_RDONLY);
+	if (fd == -1)
+		return -ENOENT;
+
+	r = read(fd, buf, len);
+	close(fd);
+	if ((r >= 0) && (r < len))
+		buf[r] = '\0';
+	else
+		return -EIO;
+
+	return 0;
+}
+
+static int sys_write_buf(char *file, char *buf)
+{
+	int fd, r;
+
+	if (!file || !buf)
+		return -EINVAL;
+
+	fd = open(file, O_WRONLY);
+	if (fd == -1)
+		return -EPERM;
+
+	r = write(fd, buf, strlen(buf));
+	close(fd);
+	if (r < 0)
+		return -EIO;
+
+	return 0;
+}
+
+int sys_get_int(char *fname, int *val)
+{
+	char buf[BUF_MAX];
+	int r;
+
+	if (!fname || !val)
+		return -EINVAL;
+
+	r = sys_read_buf(fname, buf, sizeof(buf));
+	if (r < 0)
+		return r;
+
+	*val = atoi(buf);
+	return 0;
+}
+
+int sys_get_str(char *fname, char *str, int len)
+{
+	int r;
+
+	if (!fname || !str || len < 0)
+		return -EINVAL;
+
+	r = sys_read_buf(fname, str, len);
+	if (r < 0)
+		return r;
+
+	return 0;
+}
+
+int sys_set_int(char *fname, int val)
+{
+	char buf[BUF_MAX];
+	int r;
+
+	if (!fname)
+		return -EINVAL;
+
+	snprintf(buf, sizeof(buf), "%d", val);
+	r = sys_write_buf(fname, buf);
+	if (r < 0)
+		return r;
+
+	return 0;
+}
+
+int sys_set_str(char *fname, char *val)
+{
+	int r;
+
+	if (!fname || !val)
+		return -EINVAL;
+
+	r = sys_write_buf(fname, val);
+	if (r < 0)
+		return r;
+
+	return 0;
+}
diff --git a/hw/shared.h b/hw/shared.h
new file mode 100644
index 0000000..fdff1ec
--- /dev/null
+++ b/hw/shared.h
@@ -0,0 +1,45 @@
+/*
+ * libdevice-node
+ *
+ * Copyright (c) 2015 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.
+ */
+
+
+#ifndef __HW_DEFAULT_SHARED_H__
+#define __HW_DEFAULT_SHARED_H__
+
+#ifndef EXPORT
+#define EXPORT	__attribute__ ((visibility("default")))
+#endif
+
+#define FEATURE_HARDWARE_DLOG
+#ifndef FEATURE_HARDWARE_DLOG
+#define LOG_TAG	"HARDWARE"
+#include <dlog.h>
+#define _I(fmt, args...)	SLOGI(fmt, ##args)
+#define _D(fmt, args...)	SLOGD(fmt, ##args)
+#define _E(fmt, args...)	SLOGE(fmt, ##args)
+#else
+#define _I(x, ...)			do { } while (0)
+#define _D(x, ...)			do { } while (0)
+#define _E(x, ...)			do { } while (0)
+#endif
+
+int sys_get_int(char *fname, int *val);
+int sys_get_str(char *fname, char *str, int len);
+int sys_set_int(char *fname, int val);
+int sys_set_str(char *fname, char *val);
+
+#endif
diff --git a/packaging/device-manager-plugin-exynos.spec b/packaging/device-manager-plugin-exynos.spec
index 5a5f797..9784b22 100644
--- a/packaging/device-manager-plugin-exynos.spec
+++ b/packaging/device-manager-plugin-exynos.spec
@@ -10,6 +10,7 @@ Requires(post): /sbin/ldconfig
 Requires(postun): /sbin/ldconfig
 BuildRequires:  cmake
 BuildRequires:  pkgconfig(devman_plugin)
+BuildRequires:  pkgconfig(hwcommon)
 
 %description
 Device manager plugin exynos
@@ -39,4 +40,5 @@ cp LICENSE %{buildroot}/usr/share/license/%{name}
 %files
 %manifest device-manager-plugin-exynos.manifest
 /usr/lib/libslp_devman_plugin.so
+%{_libdir}/hw/*.so
 /usr/share/license/%{name}