1 files changed, 136 insertions, 0 deletions
diff --git a/lights/lights.c b/lights/lights.c
new file mode 100644
index 0000000..1bd19f5
--- /dev/null
+++ b/lights/lights.c
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * Copyright (C) 2014 - 2015 The  Linux Foundation. All rights reserved.
+ *
+ * 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_NDEBUG 0
+
+#include <cutils/log.h>
+
+#include <string.h>
+#include <errno.h>
+#include <pthread.h>
+#include <stdlib.h>
+
+#include <hardware/lights.h>
+
+/******************************************************************************/
+#define SET_LIGHT(color)    (color & 0xffffff ? 0x28 : 0)
+
+static pthread_once_t g_init = PTHREAD_ONCE_INIT;
+static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
+
+char const* const LED1_LED_FILE
+        = "/sys/class/leds/leds/brightness";
+
+/**
+ * device methods
+ */
+
+void init_globals(void)
+{
+    // init the mutex
+    pthread_mutex_init(&g_lock, NULL);
+}
+
+static int write_int(char const* path, int value)
+{
+    FILE *fd;
+
+    fd = fopen(path, "w+");
+    if (fd) {
+        int bytes = fprintf(fd, "%d", value);
+        fclose(fd);
+        return (bytes < 0 ? bytes : 0);
+    } else {
+        ALOGE("write_int failed to open %s\n", path);
+        return -errno;
+    }
+}
+
+static int set_light_notifications(struct light_device_t* dev,
+        struct light_state_t const* state)
+{
+    int err = 0;
+    if(!dev) {
+        return -1;
+    }
+    pthread_mutex_lock(&g_lock);
+    err = write_int(LED1_LED_FILE, SET_LIGHT(state->color));
+    pthread_mutex_unlock(&g_lock);
+    return err;
+}
+
+/** Close the lights device */
+static int close_lights(struct light_device_t *dev)
+{
+    if (dev) {
+        free(dev);
+    }
+    return 0;
+}
+
+
+/******************************************************************************/
+
+/**
+ * module methods
+ */
+
+/** Open a new instance of a lights device using name */
+static int open_lights(const struct hw_module_t* module, char const* name,
+        struct hw_device_t** device)
+{
+    int (*set_light)(struct light_device_t* dev,
+            struct light_state_t const* state);
+
+    if (0 == strcmp(LIGHT_ID_NOTIFICATIONS, name))
+        set_light = set_light_notifications;
+        return -EINVAL;
+
+    pthread_once(&g_init, init_globals);
+
+    struct light_device_t *dev = calloc( 1, sizeof(struct light_device_t));
+
+    if(!dev)
+        return -ENOMEM;
+
+    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,
+};
+
+/*
+ * The lights Module
+ */
+struct hw_module_t HAL_MODULE_INFO_SYM = {
+    .tag = HARDWARE_MODULE_TAG,
+    .version_major = 1,
+    .version_minor = 0,
+    .id = LIGHTS_HARDWARE_MODULE_ID,
+    .name = "Lights Module",
+    .author = "Rockchip",
+    .methods = &lights_module_methods,
+};