Lights: Added lights module, updated init.gta04.rc

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>

3 files changed, 321 insertions, 0 deletions

diff --git a/init.gta04.rc b/init.gta04.rc
index 8f55798..e6ff9a7 100644
--- a/init.gta04.rc
+++ b/init.gta04.rc
@@ -1,4 +1,18 @@
 on boot
     write /sys/class/usb_composite/usb_mass_storage/enable 1
+
+    # Modem GPIO
     chown radio radio /sys/class/gpio/gpio186/value
     chmod 660 /sys/class/gpio/gpio186/value
+
+    # Lights
+    chown system system /sys/class/backlight/pwm-backlight/brightness
+    chown system system /sys/class/backlight/pwm-backlight/max_brightness
+    chown system system /sys/class/leds/gta04:red:power/brightness
+    chown system system /sys/class/leds/gta04:red:power/max_brightness
+    chown system system /sys/class/leds/gta04:green:power/brightness
+    chown system system /sys/class/leds/gta04:green:power/max_brightness
+    chown system system /sys/class/leds/gta04:red:aux/brightness
+    chown system system /sys/class/leds/gta04:red:aux/max_brightness
+    chown system system /sys/class/leds/gta04:green:aux/brightness
+    chown system system /sys/class/leds/gta04:green:aux/max_brightness
diff --git a/liblights/Android.mk b/liblights/Android.mk
new file mode 100644
index 0000000..49f1d1b
--- /dev/null
+++ b/liblights/Android.mk
@@ -0,0 +1,31 @@
+# Copyright (C) 2012 Paul Kocialkowski <contact@paulk.fr>
+#
+# 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.
+
+ifeq ($(TARGET_DEVICE),gta04)
+
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := lights.c
+
+LOCAL_SHARED_LIBRARIES := liblog
+
+LOCAL_PRELINK_MODULE := false
+LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_MODULE := lights.gta04
+include $(BUILD_SHARED_LIBRARY)
+
+endif
diff --git a/liblights/lights.c b/liblights/lights.c
new file mode 100644
index 0000000..2eeb171
--- /dev/null
+++ b/liblights/lights.c
@@ -0,0 +1,276 @@
+/*
+ * Copyright (C) 2012 Paul Kocialkowski <contact@paulk.fr>
+ * 
+ * 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.
+ */
+
+#define LOG_TAG "lights"
+#include <cutils/log.h>
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <hardware/lights.h>
+
+/*
+ * Globals
+ */
+
+pthread_mutex_t lights_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+const char backlight_brightness[] =
+	"/sys/class/backlight/pwm-backlight/brightness";
+const char backlight_max_brightness[] =
+	"/sys/class/backlight/pwm-backlight/max_brightness";
+
+const char battery_red_brightness[] =
+	"/sys/class/leds/gta04:red:power/brightness";
+const char battery_red_max_brightness[] =
+	"/sys/class/leds/gta04:red:power/max_brightness";
+const char battery_green_brightness[] =
+	"/sys/class/leds/gta04:green:power/brightness";
+const char battery_green_max_brightness[] =
+	"/sys/class/leds/gta04:green:power/max_brightness";
+
+const char notifications_red_brightness[] =
+	"/sys/class/leds/gta04:red:aux/brightness";
+const char notifications_red_max_brightness[] =
+	"/sys/class/leds/gta04:red:aux/max_brightness";
+const char notifications_green_brightness[] =
+	"/sys/class/leds/gta04:green:aux/brightness";
+const char notifications_green_max_brightness[] =
+	"/sys/class/leds/gta04:green:aux/max_brightness";
+
+/*
+ * Lights utils
+ */
+
+int sysfs_write_int(char *path, int value)
+{
+	char buf[10];
+	int length = 0;
+	int fd = -1;
+	int rc;
+
+	if(path == NULL)
+		return -1;
+
+	length = snprintf(buf, 10, "%d\n", value);
+
+	fd = open(path, O_WRONLY);
+	if(fd < 0)
+		return -1;
+
+	rc = write(fd, buf, length);
+
+	close(fd);
+
+	if(rc < length)
+		return -1;
+
+	return 0;
+}
+
+int sysfs_read_int(char *path)
+{
+	char buf[10];
+	int val = 0;
+	int fd = -1;
+	int rc;
+
+	if(path == NULL)
+		return -1;
+
+	fd = open(path, O_RDONLY);
+	if(fd < 0)
+		return -1;
+
+	rc = read(fd, buf, 10);
+	if(rc <= 0) {
+		close(fd);
+		return -1;
+	}
+
+	val = atoi(buf);
+
+	return val;
+}
+
+/*
+ * Lights functions
+ */
+
+static int set_light_notifications(struct light_device_t *dev,
+	const struct light_state_t *state)
+{
+	int red, green;
+	int max;
+	int rc;
+
+	// GTA04 only has red and green
+	red = state->color & 0x00ff0000;
+	green = state->color & 0x0000ff00;
+
+	// Red max
+	pthread_mutex_lock(&lights_mutex);
+	max = sysfs_read_int(notifications_red_max_brightness);
+	pthread_mutex_unlock(&lights_mutex);
+
+	if(max > 0)
+		red = (red * max) / 0xff;
+
+	// Green max
+	pthread_mutex_lock(&lights_mutex);
+	max = sysfs_read_int(notifications_green_max_brightness);
+	pthread_mutex_unlock(&lights_mutex);
+
+	if(max > 0)
+		green = (green * max) / 0xff;
+
+	pthread_mutex_lock(&lights_mutex);
+	rc = sysfs_write_int(notifications_red_brightness, red);
+	if(rc >= 0)
+		rc = sysfs_write_int(notifications_green_brightness, green);
+	pthread_mutex_unlock(&lights_mutex);
+
+	return rc;
+}
+
+static int set_light_battery(struct light_device_t *dev,
+	const struct light_state_t *state)
+{
+	int red, green;
+	int max;
+	int rc;
+
+	// GTA04 only has red and green
+	red = state->color & 0x00ff0000;
+	green = state->color & 0x0000ff00;
+
+	// Red max
+	pthread_mutex_lock(&lights_mutex);
+	max = sysfs_read_int(battery_red_max_brightness);
+	pthread_mutex_unlock(&lights_mutex);
+
+	if(max > 0)
+		red = (red * max) / 0xff;
+
+	// Green max
+	pthread_mutex_lock(&lights_mutex);
+	max = sysfs_read_int(battery_green_max_brightness);
+	pthread_mutex_unlock(&lights_mutex);
+
+	if(max > 0)
+		green = (green * max) / 0xff;
+
+	pthread_mutex_lock(&lights_mutex);
+	rc = sysfs_write_int(battery_red_brightness, red);
+	if(rc >= 0)
+		rc = sysfs_write_int(battery_green_brightness, green);
+	pthread_mutex_unlock(&lights_mutex);
+
+	return rc;
+}
+
+static int set_light_backlight(struct light_device_t *dev,
+	const struct light_state_t *state)
+{
+	int color;
+	unsigned char brightness;
+	int brightness_max;
+	int rc;
+
+	pthread_mutex_lock(&lights_mutex);
+	brightness_max =
+		sysfs_read_int(backlight_max_brightness);
+	pthread_mutex_unlock(&lights_mutex);
+
+	color = state->color & 0x00ffffff;
+	brightness = ((77*((color>>16) & 0x00ff)) + (150*((color>>8) & 0x00ff))
+		+ (29*(color & 0x00ff))) >> 8;
+
+	if(brightness_max > 0)
+		brightness = (brightness * brightness_max) / 0xff;
+
+	LOGD("Setting brightness to: %d", brightness);
+
+	pthread_mutex_lock(&lights_mutex);
+	rc = sysfs_write_int(backlight_brightness, brightness);
+	pthread_mutex_unlock(&lights_mutex);
+
+	return rc;
+}
+
+/*
+ * Interface
+ */
+
+static int close_lights(struct light_device_t *dev)
+{
+	LOGD("close_lights()");
+
+	if(dev != NULL)
+		free(dev);
+
+	return 0;
+}
+
+static int open_lights(const struct hw_module_t *module, char const *name,
+	struct hw_device_t **device)
+{
+	struct light_device_t *dev = NULL;
+	int (*set_light)(struct light_device_t *dev,
+		const struct light_state_t *state);
+
+	LOGD("open_lights(): %s", name);
+
+	if(strcmp(LIGHT_ID_BACKLIGHT, name) == 0) {
+		set_light = set_light_backlight;
+	} else if(strcmp(LIGHT_ID_BATTERY, name) == 0) {
+		set_light = set_light_battery;
+	} else if(strcmp(LIGHT_ID_NOTIFICATIONS, name) == 0) {
+		set_light = set_light_notifications;
+	} else {
+		return -1;
+	}
+
+	pthread_mutex_init(&lights_mutex, NULL);
+
+	dev = calloc(1, sizeof(struct light_device_t));
+	dev->common.tag = HARDWARE_DEVICE_TAG;
+	dev->common.version = 0;
+	dev->common.module = (struct hw_module_t *) module;
+	dev->common.close = (int (*)(struct hw_device_t *)) close_lights;
+	dev->set_light = set_light;
+
+	*device = (struct hw_device_t *) dev;
+
+	return 0;
+}
+
+static struct hw_module_methods_t lights_module_methods = {
+	.open =  open_lights,
+};
+
+const struct hw_module_t HAL_MODULE_INFO_SYM = {
+	.tag = HARDWARE_MODULE_TAG,
+	.version_major = 1,
+	.version_minor = 0,
+	.id = LIGHTS_HARDWARE_MODULE_ID,
+	.name = "Goldelico GTA04 lights",
+	.author = "Paul Kocialkowski",
+	.methods = &lights_module_methods,
+};