diff options
Diffstat (limited to 'liblight/lights.c')
| -rw-r--r-- | liblight/lights.c | 413 |
1 files changed, 413 insertions, 0 deletions
diff --git a/liblight/lights.c b/liblight/lights.c new file mode 100644 index 0000000..0e36b4b --- /dev/null +++ b/liblight/lights.c @@ -0,0 +1,413 @@ +/* + * Copyright (C) 2014, 2017 The Linux Foundation. All rights reserved. + * Not a contribution + * 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 + +#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> +#include "lights_prv.h" + +#ifndef DEFAULT_LOW_PERSISTENCE_MODE_BRIGHTNESS +#define DEFAULT_LOW_PERSISTENCE_MODE_BRIGHTNESS 0x80 +#endif + +/******************************************************************************/ + +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 g_brightness_max = 0; + +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 LCD_FILE2 + = "/sys/class/backlight/panel0-backlight/brightness"; + +char const*const BUTTON_FILE + = "/sys/class/leds/button-backlight/brightness"; + +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 PERSISTENCE_FILE + = "/sys/class/graphics/fb0/msm_fb_persist_mode"; + +/** + * 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[20]; + int bytes = snprintf(buffer, sizeof(buffer), "%d\n", value); + ssize_t amt = write(fd, buffer, (size_t)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); + // Toggle low persistence mode state + 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)); + } + if (lpEnabled != 0) { + brightness = DEFAULT_LOW_PERSISTENCE_MODE_BRIGHTNESS; + } + } + + g_last_backlight_mode = state->brightnessMode; + + brightness *= brightness; + + if (!err) { + if (!access(LCD_FILE, F_OK)) { + err = write_int(LCD_FILE, brightness); + } else { + err = write_int(LCD_FILE2, brightness); + } + } + + pthread_mutex_unlock(&g_lock); + return err; +} + +static int +set_light_backlight_ext(struct light_device_t* dev, + struct light_state_t const* state) +{ + int err = 0; + + if(!dev) { + return -1; + } + + int brightness = state->color & 0x00ffffff; + pthread_mutex_lock(&g_lock); + + if (brightness >= 0 && brightness <= g_brightness_max) { + set_brightness_ext_level(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; + green = (colorRGB >> 8) & 0xFF; + blue = colorRGB & 0xFF; + + if (onMS > 0 && offMS > 0) { + /* + * if ON time == OFF time + * use blink mode 2 + * else + * use blink mode 1 + */ + if (onMS == offMS) + blink = 2; + else + blink = 1; + } else { + blink = 0; + } + + if (blink) { + if (red) { + if (write_int(RED_BLINK_FILE, blink)) + write_int(RED_LED_FILE, 0); + } + if (green) { + if (write_int(GREEN_BLINK_FILE, blink)) + write_int(GREEN_LED_FILE, 0); + } + if (blue) { + if (write_int(BLUE_BLINK_FILE, blink)) + write_int(BLUE_LED_FILE, 0); + } + } else { + write_int(RED_LED_FILE, red); + write_int(GREEN_LED_FILE, green); + write_int(BLUE_LED_FILE, blue); + } + + 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; +} + +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; +} + +static int +set_light_buttons(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(BUTTON_FILE, state->color & 0xFF); + 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_BACKLIGHT, name)) { + char property[PROPERTY_VALUE_MAX]; + property_get("persist.extend.brightness", property, "0"); + + if(!(strncmp(property, "1", PROPERTY_VALUE_MAX)) || + !(strncmp(property, "true", PROPERTY_VALUE_MAX))) { + property_get("persist.display.max_brightness", property, "255"); + g_brightness_max = atoi(property); + set_brightness_ext_init(); + set_light = set_light_backlight_ext; + } else + set_light = set_light_backlight; + } 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 if (0 == strcmp(LIGHT_ID_BUTTONS, name)) { + if (!access(BUTTON_FILE, F_OK)) { + // enable light button when the file is present + set_light = set_light_buttons; + } else { + return -EINVAL; + } + } + 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, +}; |