diff --git a/liblights/lights.c b/liblights/lights.c index 1e54a01..1a4f40d 100644 --- a/liblights/lights.c +++ b/liblights/lights.c @@ -1,12 +1,12 @@ /* - * Copyright (C) 2008 The Android Open Source Project - * Copyright (C) 2012 milaq + * Copyright (C) 2011 The CyanogenMod Project + * Copyright (C) 2012 marc1706 * * 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 + * 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, @@ -15,8 +15,6 @@ * limitations under the License. */ - -// #define LOG_NDEBUG 0 #define LOG_TAG "lights" #include @@ -27,36 +25,43 @@ #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; -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 struct light_state_t g_notification; +static struct light_state_t g_battery; +static int g_backlight = 255; -static char const*const GREEN_LED_FILE - = "/sys/class/leds/green/brightness"; +// battery state checker vars +#define BATT_NONE 1 +#define BATT_FULL 5 +#define BATT_CHARGING 9 -static char const*const AMBER_LED_FILE - = "/sys/class/leds/amber/brightness"; +static pthread_t t_battery_checker = 0; +static int battery_thread_check = 1; +static int last_battery_state = 0; +static int force_led_amber = 0; +static int battery_thread_running = 0; -static char const*const LCD_FILE - = "/sys/class/leds/lcd-backlight/brightness"; +// sysfs files +char const*const AMBER_LED_FILE = "/sys/class/leds/amber/brightness"; +char const*const GREEN_LED_FILE = "/sys/class/leds/green/brightness"; -static char const*const AMBER_BLINK_FILE - = "/sys/class/leds/amber/blink"; +char const*const BUTTON_FILE = "/sys/class/leds/button-backlight/brightness"; -static char const*const GREEN_BLINK_FILE - = "/sys/class/leds/green/blink"; +char const*const AMBER_BLINK_FILE = "/sys/class/leds/amber/blink"; +char const*const GREEN_BLINK_FILE = "/sys/class/leds/green/blink"; +char const*const LCD_BACKLIGHT_FILE = "/sys/class/leds/lcd-backlight/brightness"; -static char const*const BUTTON_FILE - = "/sys/class/leds/button-backlight/brightness"; +char const*const BATTERY_STATUS_FILE = "/sys/class/power_supply/battery/status"; enum { LED_AMBER, @@ -66,74 +71,41 @@ enum { }; /** - * device methods + * Aux method, write int to file */ +static int write_int (const char* path, int value) { + int fd; + static int already_warned = 0; + + fd = open(path, O_RDWR); + if (fd < 0) { + if (already_warned == 0) { + LOGE("write_int failed to open %s\n", path); + already_warned = 1; + } + return -errno; + } -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; - } -} + char buffer[20]; + int bytes = snprintf(buffer, sizeof(buffer), "%d\n",value); + int written = write (fd, buffer, bytes); + close (fd); -static int -is_lit(struct light_state_t const* state) -{ - return state->color & 0x00ffffff; -} + return written == -1 ? -errno : 0; -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; +void init_globals (void) { + pthread_mutex_init (&g_lock, NULL); } -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 is_lit (struct light_state_t const* state) { + return state->color & 0x00ffffff; } -static void -set_speaker_light_locked(struct light_device_t* dev, - struct light_state_t const* state) -{ - unsigned int colorRGB = state->color & 0xFFFFFF; + +static void set_speaker_light_locked (struct light_device_t *dev, struct light_state_t *state) { + unsigned int colorRGB = state->color & 0xFFFFFF; unsigned int color = LED_BLANK; if (colorRGB & 0xFF) @@ -142,6 +114,17 @@ set_speaker_light_locked(struct light_device_t* dev, color = LED_GREEN; if ((colorRGB >> 16)&0xFF) color = LED_AMBER; + + /* + * this is needed in order to make sure that we don't show the green led + * at first while having a battery level between 90% and 100% + * -- marc1706 + */ + if (state->flashMode == LIGHT_FLASH_NONE && color == LED_GREEN && + force_led_amber) { + color = LED_AMBER; + force_led_amber = 0; + } int amber = (colorRGB >> 16)&0xFF; int green = (colorRGB >> 8)&0xFF; @@ -200,48 +183,240 @@ set_speaker_light_locked(struct light_device_t* dev, } -static void -handle_speaker_battery_locked(struct light_device_t* dev) -{ +/* +* check battery level and change LED if necessary +* Copyright (C) 2012 Marc Alexander - marc1706 +* +* @param (int) ret: return 1 if charging, 0 if full +*/ +static int check_battery_level(int ret) { + char str[20]; + int batt, battery_state; + + memset(&str[0], 0, sizeof(str)); + + batt = open(BATTERY_STATUS_FILE,O_RDONLY); + read(batt, str, 20); + close(batt); + + battery_state = 0; + battery_state = sprintf(str, "%s", str); + + if (last_battery_state != BATT_CHARGING && last_battery_state != BATT_FULL) { + last_battery_state = BATT_NONE; + LOGE("%s: Incorrect last battery_state! Resetting last battery state!", + __func__); + } + + if (battery_state != BATT_CHARGING && battery_state != BATT_FULL) + LOGE("%s: Incorrect battery_state!", __func__); + + // did the battery state change? + if (battery_state != last_battery_state) { + last_battery_state = battery_state; + + // battery & notification led should show + if (is_lit (&g_battery) && is_lit (&g_notification)) { + if (battery_state == BATT_CHARGING) { + // Charging -- fast blink amber + write_int (AMBER_BLINK_FILE, 2); + write_int (GREEN_LED_FILE, 0); + if (ret) + ret = 1; + } else { + // Charging -- fast blink green + write_int (AMBER_LED_FILE, 0); + write_int (GREEN_BLINK_FILE, 3); + // cancel thread if we reached full level + battery_thread_check = 0; + if (ret) + ret = 1; + } + } else if (!(is_lit (&g_battery) && is_lit (&g_notification))) { + if (battery_state == BATT_CHARGING) { + // Charging + write_int (AMBER_LED_FILE, 1); + write_int (GREEN_LED_FILE, 0); + if (ret) + ret = 1; + } else if (battery_state == BATT_FULL) { + // Full + write_int (AMBER_LED_FILE, 0); + write_int (GREEN_LED_FILE, 1); + // cancel thread if we reached full level + battery_thread_check = 0; + if (ret) + ret = 0; + } + } + LOGI("%s: state=%u", __func__, battery_state); + } else if (ret) { + if (battery_state == BATT_CHARGING) + ret = 1; + else + ret = 0; + } + + return ret; +} - if (is_lit(&g_battery)) { - set_speaker_light_locked(dev, &g_battery); - } else { - set_speaker_light_locked(dev, &g_notification); - } +/* +* thread routing for checking the battery state +* Copyright (C) 2012 Marc Alexander - marc1706 +*/ +void *battery_level_check(void *arg) { + struct timespec wait; + wait.tv_nsec = 1; + wait.tv_sec = 5; + + struct timespec start_wait; + start_wait.tv_nsec = 500000000; + start_wait.tv_sec = 0; + + // wait for last thread to finish + while (battery_thread_running) + nanosleep(&start_wait, NULL); + + battery_thread_running = 1; + battery_thread_check = 1; + + while (battery_thread_check) { + check_battery_level(0); + nanosleep(&wait, NULL); + } + + LOGI("%s: done with thread", __func__); + battery_thread_running = 0; + + return NULL; } -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; +/* +* start thread for checking battery state +* Copyright (C) 2012 Marc Alexander - marc1706 +*/ +void start_battery_thread() { + LOGI("%s: start thread", __func__); + if (t_battery_checker == 0) + pthread_create(&t_battery_checker, NULL, battery_level_check, NULL); } -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 void set_speaker_light_locked_dual (struct light_device_t *dev, struct light_state_t *bstate, struct light_state_t *nstate) { + + unsigned int bcolorRGB = bstate->color & 0xFFFFFF; + unsigned int bcolor = LED_BLANK; + int is_charging = check_battery_level(1); + + if ((bcolorRGB >> 8)&0xFF) bcolor = LED_GREEN; + if ((bcolorRGB >> 16)&0xFF) bcolor = LED_AMBER; + + if (bcolor == LED_GREEN && is_charging) { + write_int (AMBER_BLINK_FILE, 2); + write_int (GREEN_LED_FILE, 0); + start_battery_thread(); + } else if (bcolor == LED_AMBER) { + write_int (AMBER_BLINK_FILE, 2); + write_int (GREEN_LED_FILE, 0); + } else if (bcolor == LED_GREEN) { + write_int (AMBER_LED_FILE, 0); + write_int (GREEN_BLINK_FILE, 3); + } else { + LOGE("set_led_state (dual) unexpected color: bcolorRGB=%08x\n", bcolorRGB); + } } +static void handle_speaker_battery_locked (struct light_device_t *dev) { + unsigned int colorRGB = g_battery.color & 0xFFFFFF; + int ret = 0; + + // reset threads first + t_battery_checker = 0; + battery_thread_check = 0; + + if (is_lit (&g_battery) && is_lit (&g_notification)) { + set_speaker_light_locked_dual (dev, &g_battery, &g_notification); + } else if (is_lit (&g_battery)) { + // check if battery is below 100% and we are trying to show the green led + if ((colorRGB >> 8)&0xFF) { + ret = check_battery_level(1); + if (ret) { + force_led_amber = 1; + start_battery_thread(); + } + + LOGV("%s: changing color from LED_GREEN to LED_AMBER", __func__); + } + set_speaker_light_locked (dev, &g_battery); + } else { + set_speaker_light_locked (dev, &g_notification); + } + LOGV("%s: g_battery=%d , g_notification=%d", __func__, is_lit (&g_battery), + is_lit (&g_notification)); +} + +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); -/** Close the lights device */ -static int -close_lights(struct light_device_t *dev) + return err; +} + +static int rgb_to_brightness(struct light_state_t const* state) { - if (dev) { - free(dev); - } - return 0; + 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); + LOGV("%s: brightness=%d color=0x%08x", + __func__,brightness, state->color); + pthread_mutex_lock(&g_lock); + g_backlight = brightness; + err = write_int(LCD_BACKLIGHT_FILE, brightness); + pthread_mutex_unlock(&g_lock); + return err; +} + +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_attention (struct light_device_t* dev, + struct light_state_t const* state) { + /* bravo has no attention, bad bravo */ + /* dito on the leo */ + 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; } @@ -251,55 +426,58 @@ close_lights(struct light_device_t *dev) * 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; +/* 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_ATTENTION, name)) { + set_light = set_light_attention; + } + else if (0 == strcmp(LIGHT_ID_NOTIFICATIONS, name)) { + set_light = set_light_notifications; + } + else { + return -EINVAL; + } + + pthread_once (&g_init, init_globals); + 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, + .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 = "HTC leo lights module", - .author = "Micha LaQua", - .methods = &lights_module_methods, + .tag = HARDWARE_MODULE_TAG, + .version_major = 1, + .version_minor = 0, + .id = LIGHTS_HARDWARE_MODULE_ID, + .name = "HTC leo lights module", + .author = "Marc Alexander", + .methods = &lights_module_methods, };