/* * 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 <linux/msm_mdp.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_last_backlight_mode = BRIGHTNESS_MODE_USER; 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/leds/lcd-backlight/brightness"; char const*const PERSISTENCE_FILE = "/sys/class/leds/lcd-backlight/low_persistence"; 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); unsigned int lpEnabled = state->brightnessMode == BRIGHTNESS_MODE_LOW_PERSISTENCE; if(!dev) { return -1; } pthread_mutex_lock(&g_lock); // If we're not in lp mode and it has been enabled or if we are in lp mode // and it has been disabled send an ioctl to the display with the update if ((g_last_backlight_mode != state->brightnessMode && lpEnabled) || (!lpEnabled && g_last_backlight_mode == BRIGHTNESS_MODE_LOW_PERSISTENCE)) { if ((err = write_int(PERSISTENCE_FILE, lpEnabled)) != 0) { ALOGE("%s: Failed to write to %s: %s\n", __FUNCTION__, PERSISTENCE_FILE, strerror(errno)); } } g_last_backlight_mode = state->brightnessMode; if (!err) { err = 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 blink; 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, };