diff options
Diffstat (limited to 'liblight/lights.c')
| -rw-r--r-- | liblight/lights.c | 470 |
1 files changed, 0 insertions, 470 deletions
diff --git a/liblight/lights.c b/liblight/lights.c deleted file mode 100644 index ac5af69..0000000 --- a/liblight/lights.c +++ /dev/null @@ -1,470 +0,0 @@ -/* - * Copyright (C) 2008 The Android Open Source Project - * Copyright (C) 2014 The Linux Foundation. All rights reserved. - * Copyright (C) 2015-2016 The CyanogenMod Project - * Copyright (C) 2018 The LineageOS 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" - -#include <cutils/log.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> - -/******************************************************************************/ - -static pthread_once_t g_init = PTHREAD_ONCE_INIT; -static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER; -static struct light_state_t g_attention; -static struct light_state_t g_notification; -static struct light_state_t g_battery; - -#define LCD_BRIGHTNESS_FILE "/sys/class/leds/lcd-backlight/brightness" -#define LCD_MAX_BRIGHTNESS_FILE "/sys/class/leds/lcd-backlight/max_brightness" - -#define RED_LED_BRIGHTNESS_FILE "/sys/class/leds/red/brightness" -#define GREEN_LED_BRIGHTNESS_FILE "/sys/class/leds/green/brightness" -#define BLUE_LED_BRIGHTNESS_FILE "/sys/class/leds/blue/brightness" - -#define RED_DUTY_PCTS_FILE "/sys/class/leds/red/duty_pcts" -#define GREEN_DUTY_PCTS_FILE "/sys/class/leds/green/duty_pcts" -#define BLUE_DUTY_PCTS_FILE "/sys/class/leds/blue/duty_pcts" - -#define RED_START_IDX_FILE "/sys/class/leds/red/start_idx" -#define GREEN_START_IDX_FILE "/sys/class/leds/green/start_idx" -#define BLUE_START_IDX_FILE "/sys/class/leds/blue/start_idx" - -#define RED_PAUSE_LO_FILE "/sys/class/leds/red/pause_lo" -#define GREEN_PAUSE_LO_FILE "/sys/class/leds/green/pause_lo" -#define BLUE_PAUSE_LO_FILE "/sys/class/leds/blue/pause_lo" - -#define RED_PAUSE_HI_FILE "/sys/class/leds/red/pause_hi" -#define GREEN_PAUSE_HI_FILE "/sys/class/leds/green/pause_hi" -#define BLUE_PAUSE_HI_FILE "/sys/class/leds/blue/pause_hi" - -#define RED_RAMP_STEP_MS_FILE "/sys/class/leds/red/ramp_step_ms" -#define GREEN_RAMP_STEP_MS_FILE "/sys/class/leds/green/ramp_step_ms" -#define BLUE_RAMP_STEP_MS_FILE "/sys/class/leds/blue/ramp_step_ms" - -#define RED_BLINK_FILE "/sys/class/leds/red/blink" -#define GREEN_BLINK_FILE "/sys/class/leds/green/blink" -#define BLUE_BLINK_FILE "/sys/class/leds/blue/blink" - -#define RGB_BLINK_FILE "/sys/class/leds/rgb/rgb_blink" - -#define RAMP_SIZE 8 -static int BRIGHTNESS_RAMP[RAMP_SIZE] = { 0, 12, 25, 37, 50, 72, 85, 100 }; -#define RAMP_STEP_DURATION 50 - -#define DEFAULT_MAX_BRIGHTNESS 255 -int max_brightness; - -/** - * device methods - */ - -void init_globals(void) -{ - // init the mutex - pthread_mutex_init(&g_lock, NULL); -} - -static int read_int(char const* path) -{ - int fd, len; - int num_bytes = 10; - char buf[11]; - int retval; - - fd = open(path, O_RDONLY); - if (fd < 0) { - ALOGE("%s: failed to open %s\n", __func__, path); - goto fail; - } - - len = read(fd, buf, num_bytes - 1); - if (len < 0) { - ALOGE("%s: failed to read from %s\n", __func__, path); - goto fail; - } - - buf[len] = '\0'; - close(fd); - - // no endptr, decimal base - retval = strtol(buf, NULL, 10); - return retval == 0 ? -1 : retval; - -fail: - if (fd >= 0) - close(fd); - return -1; -} - -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("%s: failed to open %s\n", __func__, path); - already_warned = 1; - } - return -errno; - } -} - -static int -write_str(char const* path, char* value) -{ - int fd; - static int already_warned = 0; - - fd = open(path, O_RDWR); - if (fd >= 0) { - char buffer[1024]; - int bytes = snprintf(buffer, sizeof(buffer), "%s\n", value); - ssize_t amt = write(fd, buffer, (size_t)bytes); - close(fd); - return amt == -1 ? -errno : 0; - } else { - if (already_warned == 0) { - ALOGE("%s: failed to open %s\n", __func__, 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); - - if (!dev) - return -1; - - // If max panel brightness is not the default (255), - // apply linear scaling across the accepted range. - if (max_brightness != DEFAULT_MAX_BRIGHTNESS) { - int old_brightness = brightness; - brightness = brightness * max_brightness / DEFAULT_MAX_BRIGHTNESS; - ALOGV("%s: scaling brightness %d => %d\n", __func__, old_brightness, brightness); - } - - pthread_mutex_lock(&g_lock); - err = write_int(LCD_BRIGHTNESS_FILE, brightness); - pthread_mutex_unlock(&g_lock); - return err; -} - -static char* -get_scaled_duty_pcts(int brightness) -{ - char *buf = malloc(5 * RAMP_SIZE * sizeof(char)); - char *pad = ""; - int i = 0; - - memset(buf, 0, 5 * RAMP_SIZE * sizeof(char)); - - for (i = 0; i < RAMP_SIZE; i++) { - char temp[5] = ""; - snprintf(temp, sizeof(temp), "%s%d", pad, (BRIGHTNESS_RAMP[i] * brightness / 255)); - strcat(buf, temp); - pad = ","; - } - ALOGV("%s: brightness=%d, duty=%s\n", __func__, brightness, buf); - return buf; -} - -static int -set_speaker_light_locked(struct light_device_t* dev, - struct light_state_t const* state) -{ - int red, green, blue, blink; - int onMS, offMS, stepDuration, pauseHi; - unsigned int colorRGB; - char *duty; - - 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; - - ALOGV("%s: mode %d, colorRGB=%08X, onMS=%d, offMS=%d\n", - __func__, state->flashMode, colorRGB, onMS, offMS); - - red = (colorRGB >> 16) & 0xFF; - green = (colorRGB >> 8) & 0xFF; - blue = colorRGB & 0xFF; - blink = onMS > 0 && offMS > 0; - - // Disable all blinking to start - write_int(RGB_BLINK_FILE, 0); - - if (blink) { - stepDuration = RAMP_STEP_DURATION; - pauseHi = onMS - (stepDuration * RAMP_SIZE * 2); - if (stepDuration * RAMP_SIZE * 2 > onMS) { - stepDuration = onMS / (RAMP_SIZE * 2); - pauseHi = 0; - } - - // red - write_int(RED_START_IDX_FILE, 0); - duty = get_scaled_duty_pcts(red); - write_str(RED_DUTY_PCTS_FILE, duty); - write_int(RED_PAUSE_LO_FILE, offMS); - // The led driver is configured to ramp up then ramp - // down the lut. This effectively doubles the ramp duration. - write_int(RED_PAUSE_HI_FILE, pauseHi); - write_int(RED_RAMP_STEP_MS_FILE, stepDuration); - free(duty); - - // green - write_int(GREEN_START_IDX_FILE, RAMP_SIZE); - duty = get_scaled_duty_pcts(green); - write_str(GREEN_DUTY_PCTS_FILE, duty); - write_int(GREEN_PAUSE_LO_FILE, offMS); - // The led driver is configured to ramp up then ramp - // down the lut. This effectively doubles the ramp duration. - write_int(GREEN_PAUSE_HI_FILE, pauseHi); - write_int(GREEN_RAMP_STEP_MS_FILE, stepDuration); - free(duty); - - // blue - write_int(BLUE_START_IDX_FILE, RAMP_SIZE * 2); - duty = get_scaled_duty_pcts(blue); - write_str(BLUE_DUTY_PCTS_FILE, duty); - write_int(BLUE_PAUSE_LO_FILE, offMS); - // The led driver is configured to ramp up then ramp - // down the lut. This effectively doubles the ramp duration. - write_int(BLUE_PAUSE_HI_FILE, pauseHi); - write_int(BLUE_RAMP_STEP_MS_FILE, stepDuration); - free(duty); - - // Start the party - write_int(RGB_BLINK_FILE, 1); - } else { - if (red == 0 && green == 0 && blue == 0) { - write_int(RED_BLINK_FILE, 0); - write_int(GREEN_BLINK_FILE, 0); - write_int(BLUE_BLINK_FILE, 0); - } - write_int(RED_LED_BRIGHTNESS_FILE, red); - write_int(GREEN_LED_BRIGHTNESS_FILE, green); - write_int(BLUE_LED_BRIGHTNESS_FILE, blue); - } - - - return 0; -} - -static void -handle_speaker_light_locked(struct light_device_t* dev) -{ - if (is_lit(&g_attention)) - set_speaker_light_locked(dev, &g_attention); - else if (is_lit(&g_notification)) - set_speaker_light_locked(dev, &g_notification); - else - set_speaker_light_locked(dev, &g_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_light_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); - - unsigned int brightness; - unsigned int color; - unsigned int rgb[3]; - - g_notification = *state; - - // If a brightness has been applied by the user - brightness = (g_notification.color & 0xFF000000) >> 24; - if (brightness > 0 && brightness < 0xFF) { - - // Retrieve each of the RGB colors - color = g_notification.color & 0x00FFFFFF; - rgb[0] = (color >> 16) & 0xFF; - rgb[1] = (color >> 8) & 0xFF; - rgb[2] = color & 0xFF; - - // Apply the brightness level - if (rgb[0] > 0) - rgb[0] = (rgb[0] * brightness) / 0xFF; - if (rgb[1] > 0) - rgb[1] = (rgb[1] * brightness) / 0xFF; - if (rgb[2] > 0) - rgb[2] = (rgb[2] * brightness) / 0xFF; - - // Update with the new color - g_notification.color = (rgb[0] << 16) + (rgb[1] << 8) + rgb[2]; - } - - handle_speaker_light_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); - g_attention = *state; - handle_speaker_light_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_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_ATTENTION, name)) - set_light = set_light_attention; - else - return -EINVAL; - - max_brightness = read_int(LCD_MAX_BRIGHTNESS_FILE); - if (max_brightness < 0) { - ALOGE("%s: failed to read max panel brightness, fallback to 255!\n", __func__); - max_brightness = DEFAULT_MAX_BRIGHTNESS; - } - - 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", - .author = "The CyanogenMod Project", - .methods = &lights_module_methods, -}; |