/* * Copyright (C) 2008 The Android Open Source Project * * 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 #define LOG_TAG "lights" #include #include #include #include #include #include #include #include #include #include /******************************************************************************/ static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER; static struct light_state_t g_notification = {0,0,0,0,0}; static struct light_state_t g_battery = {0,0,0,0,0}; static char const*const GREEN_LED_FILE = "/sys/class/leds/green/brightness"; static char const*const AMBER_LED_FILE = "/sys/class/leds/amber/brightness"; static char const*const RED_LED_FILE = "/sys/class/leds/red/brightness"; static char const*const LCD_FILE = "/sys/class/leds/lcd-backlight/brightness"; static char const*const AMBER_BLINK_FILE = "/sys/class/leds/amber/blink"; static char const*const GREEN_BLINK_FILE = "/sys/class/leds/green/blink"; static char const*const RED_BLINK_FILE = "/sys/class/leds/red/blink"; static char const*const BUTTON_FILE = "/sys/class/leds/button-backlight/brightness"; /** * device methods */ static int write_int(char const* path, int value) { int fd; static int already_warned = 0; fd = open(path, O_RDWR); if (fd >= 0) { char buffer[20]; int bytes = sprintf(buffer, "%d\n", value); int amt = write(fd, buffer, bytes); close(fd); return amt == -1 ? -errno : 0; } else { if (already_warned == 0) { LOGE("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); pthread_mutex_lock(&g_lock); err = write_int(LCD_FILE, brightness); pthread_mutex_unlock(&g_lock); return err; } static int set_light_buttons(struct light_device_t* dev, struct light_state_t const* state) { int err = 0; int on = is_lit(state); pthread_mutex_lock(&g_lock); err = write_int(BUTTON_FILE, on?255:0); 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 len; int alpha, red, green, blue; int blink, freq, pwm; int onMS, offMS; unsigned int colorRGB; switch (state->flashMode) { case LIGHT_FLASH_TIMED: blink = 1; onMS = state->flashOnMS; offMS = state->flashOffMS; break; case LIGHT_FLASH_HARDWARE: blink = 1; onMS = state->flashOnMS; offMS = state->flashOffMS; break; case LIGHT_FLASH_NONE: blink = 0; onMS = 0; offMS = 0; break; default: blink = 1; onMS = 0; offMS = 0; break; } colorRGB = state->color; #if 0 LOGD("set_speaker_light_locked colorRGB=%08X, onMS=%d, offMS=%d\n", colorRGB, onMS, offMS); #endif red = (colorRGB >> 16) & 0xFF; green = (colorRGB >> 8) & 0xFF; blue = colorRGB & 0xFF; if (red) { write_int(GREEN_LED_FILE, 0); write_int(AMBER_LED_FILE, 1); if (blink) { //blink must come after brightness change write_int(AMBER_BLINK_FILE, 1); } } else if (green || blue) { write_int(AMBER_LED_FILE, 0); write_int(GREEN_LED_FILE, 1); if (blink) { write_int(GREEN_BLINK_FILE, 1); } } else { write_int(GREEN_LED_FILE, 0); write_int(AMBER_LED_FILE, 0); } 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); } } 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; } 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; } /** 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; } else if (0 == strcmp(LIGHT_ID_BUTTONS, name)) { set_light = set_light_buttons; } else if (0 == strcmp(LIGHT_ID_BATTERY, name)) { set_light = set_light_battery; } else if (0 == strcmp(LIGHT_ID_NOTIFICATIONS, name)) { set_light = set_light_notifications; } else { return -EINVAL; } struct light_device_t *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, }; /* * The lights Module */ 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 = "QCT MSM7K lights Module", .author = "Google, Inc.", .methods = &lights_module_methods, };