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-rw-r--r--liblight/lights.c360
1 files changed, 360 insertions, 0 deletions
diff --git a/liblight/lights.c b/liblight/lights.c
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--- /dev/null
+++ b/liblight/lights.c
@@ -0,0 +1,360 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * Copyright (C) 2014 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.
+ */
+
+#include <cutils/log.h>
+#include <cutils/properties.h>
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+
+#include <sys/ioctl.h>
+#include <sys/types.h>
+
+#include <hardware/lights.h>
+
+/*
+ * Change this to 1 to support battery notifications via BatteryService
+ */
+#define LIGHTS_SUPPORT_BATTERY 0
+#define CG_COLOR_ID_PROPERTY "ro.boot.hardware.color"
+
+static pthread_once_t g_init = PTHREAD_ONCE_INIT;
+static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
+static struct light_state_t g_notification;
+static struct light_state_t g_battery;
+static int g_attention = 0;
+static int rgb_brightness_ratio = 255;
+
+char const*const RED_LED_FILE
+ = "/sys/class/leds/red/brightness";
+
+char const*const GREEN_LED_FILE
+ = "/sys/class/leds/green/brightness";
+
+char const*const BLUE_LED_FILE
+ = "/sys/class/leds/blue/brightness";
+
+char const*const LCD_FILE
+ = "/sys/class/backlight/panel/brightness";
+
+char const*const PERSISTENCE_FILE
+ = "/sys/class/graphics/fb0/msm_fb_persist_mode";
+
+char const*const RED_BLINK_FILE
+ = "/sys/class/leds/red/blink";
+
+char const*const GREEN_BLINK_FILE
+ = "/sys/class/leds/green/blink";
+
+char const*const BLUE_BLINK_FILE
+ = "/sys/class/leds/blue/blink";
+
+char const*const RED_ON_OFF_MS_FILE
+ = "/sys/class/leds/red/on_off_ms";
+
+char const*const GREEN_ON_OFF_MS_FILE
+ = "/sys/class/leds/green/on_off_ms";
+
+char const*const BLUE_ON_OFF_MS_FILE
+ = "/sys/class/leds/blue/on_off_ms";
+
+char const*const RED_RGB_START_FILE
+ = "/sys/class/leds/red/rgb_start";
+
+char const*const GREEN_RGB_START_FILE
+ = "/sys/class/leds/green/rgb_start";
+
+char const*const BLUE_RGB_START_FILE
+ = "/sys/class/leds/blue/rgb_start";
+
+/**
+ * device methods
+ */
+
+void init_globals(void)
+{
+ char color_id_prop[PROPERTY_VALUE_MAX] = {""};
+
+ // init the mutex
+ pthread_mutex_init(&g_lock, NULL);
+
+ // check CG color
+ property_get(CG_COLOR_ID_PROPERTY, color_id_prop, "DEF00");
+ if (strcmp(color_id_prop, "GRA00") == 0) {
+ rgb_brightness_ratio = 25;
+ } else if (strcmp(color_id_prop, "SLV00") == 0) {
+ rgb_brightness_ratio = 15;
+ } else if (strcmp(color_id_prop, "BLU00") == 0) {
+ rgb_brightness_ratio = 15;
+ } else {
+ rgb_brightness_ratio = 20;
+ }
+}
+
+static int
+write_int(char const* path, int value)
+{
+ int fd;
+ static int already_warned = 0;
+
+ fd = open(path, O_WRONLY);
+ if (fd >= 0) {
+ char buffer[20];
+ size_t bytes = snprintf(buffer, sizeof(buffer), "%d\n", value);
+ if(bytes >= sizeof(buffer)) return -EINVAL;
+ ssize_t amt = write(fd, buffer, bytes);
+ close(fd);
+ return amt == -1 ? -errno : 0;
+ } else {
+ if (already_warned == 0) {
+ ALOGE("write_int failed to open %s\n", path);
+ already_warned = 1;
+ }
+ return -errno;
+ }
+}
+
+static int
+write_double_int(char const* path, int value1, int value2)
+{
+ int fd;
+ static int already_warned = 0;
+
+ fd = open(path, O_WRONLY);
+ if (fd >= 0) {
+ char buffer[20];
+ size_t bytes = snprintf(buffer, sizeof(buffer), "%d %d\n", value1, value2);
+ if(bytes >= sizeof(buffer)) return -EINVAL;
+ ssize_t amt = write(fd, buffer, bytes);
+ close(fd);
+ return amt == -1 ? -errno : 0;
+ } else {
+ if (already_warned == 0) {
+ ALOGE("write_int failed to open %s\n", path);
+ already_warned = 1;
+ }
+ return -errno;
+ }
+}
+
+static int
+is_lit(struct light_state_t const* state)
+{
+ return state->color & 0x00ffffff;
+}
+
+static int
+rgb_to_brightness(struct light_state_t const* state)
+{
+ int color = state->color & 0x00ffffff;
+ return ((77*((color>>16)&0x00ff))
+ + (150*((color>>8)&0x00ff)) + (29*(color&0x00ff))) >> 8;
+}
+
+static int
+set_light_backlight(struct light_device_t* dev,
+ struct light_state_t const* state)
+{
+ int err = 0;
+ int brightness = rgb_to_brightness(state);
+ brightness = (int)(brightness * 24.f / 255);
+
+ (void)dev;
+
+ pthread_mutex_lock(&g_lock);
+ write_int(LCD_FILE, brightness);
+ pthread_mutex_unlock(&g_lock);
+
+ return err;
+}
+
+static int
+set_speaker_light_locked(struct light_device_t* dev,
+ struct light_state_t const* state)
+{
+ int red, green, blue;
+ int onMS, offMS;
+ unsigned int colorRGB;
+
+ if(!dev) {
+ return -1;
+ }
+
+ switch (state->flashMode) {
+ case LIGHT_FLASH_TIMED:
+ onMS = state->flashOnMS;
+ offMS = state->flashOffMS;
+ break;
+ case LIGHT_FLASH_NONE:
+ default:
+ onMS = 0;
+ offMS = 0;
+ break;
+ }
+
+ colorRGB = state->color;
+
+#if 0
+ ALOGD("set_speaker_light_locked mode %d, colorRGB=%08X, onMS=%d, offMS=%d\n",
+ state->flashMode, colorRGB, onMS, offMS);
+#endif
+
+ red = ((colorRGB >> 16) & 0xFF) * rgb_brightness_ratio / 255;
+ green = ((colorRGB >> 8) & 0xFF) * rgb_brightness_ratio / 255;
+ blue = (colorRGB & 0xFF) * rgb_brightness_ratio / 255;
+
+ write_double_int(RED_ON_OFF_MS_FILE, onMS, offMS);
+ write_int(RED_LED_FILE, red);
+ write_double_int(GREEN_ON_OFF_MS_FILE, onMS, offMS);
+ write_int(GREEN_LED_FILE, green);
+ write_double_int(BLUE_ON_OFF_MS_FILE, onMS, offMS);
+ write_int(BLUE_LED_FILE, blue);
+
+ if(!write_int(RED_RGB_START_FILE, 1))
+ if(!write_int(GREEN_RGB_START_FILE, 1))
+ if(!write_int(BLUE_RGB_START_FILE, 1))
+ return -1;
+
+ return 0;
+}
+
+static void
+handle_speaker_battery_locked(struct light_device_t* dev)
+{
+ if (is_lit(&g_battery)) {
+ set_speaker_light_locked(dev, &g_battery);
+ } else {
+ set_speaker_light_locked(dev, &g_notification);
+ }
+}
+
+#if LIGHTS_SUPPORT_BATTERY
+static int
+set_light_battery(struct light_device_t* dev,
+ struct light_state_t const* state)
+{
+ pthread_mutex_lock(&g_lock);
+ g_battery = *state;
+ handle_speaker_battery_locked(dev);
+ pthread_mutex_unlock(&g_lock);
+ return 0;
+}
+#endif
+
+static int
+set_light_notifications(struct light_device_t* dev,
+ struct light_state_t const* state)
+{
+ pthread_mutex_lock(&g_lock);
+ g_notification = *state;
+ handle_speaker_battery_locked(dev);
+ pthread_mutex_unlock(&g_lock);
+ return 0;
+}
+
+static int
+set_light_attention(struct light_device_t* dev,
+ struct light_state_t const* state)
+{
+ pthread_mutex_lock(&g_lock);
+ if (state->flashMode == LIGHT_FLASH_HARDWARE) {
+ g_attention = state->flashOnMS;
+ } else if (state->flashMode == LIGHT_FLASH_NONE) {
+ g_attention = 0;
+ }
+ handle_speaker_battery_locked(dev);
+ pthread_mutex_unlock(&g_lock);
+ return 0;
+}
+
+/** 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_BACKLIGHT, name))
+ set_light = set_light_backlight;
+#if LIGHTS_SUPPORT_BATTERY
+ else if (0 == strcmp(LIGHT_ID_BATTERY, name))
+ set_light = set_light_battery;
+#endif
+ else if (0 == strcmp(LIGHT_ID_NOTIFICATIONS, name))
+ set_light = set_light_notifications;
+ else if (0 == strcmp(LIGHT_ID_ATTENTION, name))
+ set_light = set_light_attention;
+ else
+ return -EINVAL;
+
+ pthread_once(&g_init, init_globals);
+
+ struct light_device_t *dev = malloc(sizeof(struct light_device_t));
+
+ if(!dev)
+ return -ENOMEM;
+
+ memset(dev, 0, sizeof(*dev));
+
+ dev->common.tag = HARDWARE_DEVICE_TAG;
+ dev->common.version = LIGHTS_DEVICE_API_VERSION_2_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 = "Google, Inc.",
+ .methods = &lights_module_methods,
+};
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