/* * Copyright (C) 2015 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_TAG "lights" #define DEBUG 1 #include #include #include #include #include #include #include #include #include #include #include /******************************************************************************/ static pthread_once_t g_init = PTHREAD_ONCE_INIT; static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER; char const *const LCD_FILE = "/sys/class/leds/lcd-backlight/brightness"; 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 RED_TIMEOUT_FILE = "/sys/class/leds/red/on_off_ms"; char const *const GREEN_TIMEOUT_FILE = "/sys/class/leds/green/on_off_ms"; char const *const BLUE_TIMEOUT_FILE = "/sys/class/leds/blue/on_off_ms"; char const *const RGB_LOCKED_FILE = "/sys/class/leds/red/rgb_start"; /** * device methods */ void init_globals(void) { // init the mutex pthread_mutex_init(&g_lock, NULL); } 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[32] = {0,}; int bytes = snprintf(buffer, sizeof(buffer), "%d\n", value); int 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_on_off(char const* path, int on, int off) { int fd; static int already_warned = 0; fd = open(path, O_RDWR); if (fd >= 0) { char buffer[32] = {0,}; int bytes = snprintf(buffer, sizeof(buffer), "%d %d\n", on, off); int 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 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; } #if TEST_COMPLEX_CFG void simple_recursion(int recursion) { if (recursion == 0) return; ALOGE("simple_recursion %d", recursion); simple_recursion(recursion - 1); } #endif static int set_light_backlight(struct light_device_t* dev __unused, 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); #if TEST_COMPLEX_CFG simple_recursion(10); #endif return err; } static int set_light_locked(struct light_state_t const* state, int type __unused) { int red, green, blue; int onMS, offMS; unsigned int colorRGB; switch (state->flashMode) { case LIGHT_FLASH_TIMED: case LIGHT_FLASH_HARDWARE: onMS = state->flashOnMS; offMS = state->flashOffMS; break; case LIGHT_FLASH_NONE: default: onMS = 0; offMS = 0; break; } colorRGB = state->color; #if DEBUG ALOGD("set_light_locked mode %d, colorRGB=%08X, onMS=%d, offMS=%d\n", state->flashMode, colorRGB, onMS, offMS); #endif red = (colorRGB >> 16) & 0xFF; green = (colorRGB >> 8) & 0xFF; blue = colorRGB & 0xFF; // due to limitation of driver if (onMS == 0) { red = 0; green = 0; blue = 0; } write_int(RGB_LOCKED_FILE, 0); write_int(RED_LED_FILE, red); write_int(GREEN_LED_FILE, green); write_int(BLUE_LED_FILE, blue); write_on_off(RED_TIMEOUT_FILE, onMS, offMS); write_on_off(GREEN_TIMEOUT_FILE, onMS, offMS); write_on_off(BLUE_TIMEOUT_FILE, onMS, offMS); write_int(RGB_LOCKED_FILE, 1); return 0; } static int set_light_notifications(struct light_device_t* dev __unused, struct light_state_t const* state) { pthread_mutex_lock(&g_lock); set_light_locked(state, 0); pthread_mutex_unlock(&g_lock); return 0; } static int set_light_attention(struct light_device_t* dev __unused, struct light_state_t const* state) { pthread_mutex_lock(&g_lock); set_light_locked(state, 1); 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 (!strcmp(LIGHT_ID_BACKLIGHT, name)) set_light = set_light_backlight; else if (!strcmp(LIGHT_ID_NOTIFICATIONS, name)) set_light = set_light_notifications; else if (!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 = 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 (VTS instrumented)", .author = "Google, Inc.", .methods = &lights_module_methods, };