zenfone6: Import CAF lights HAL
* Modified to build with -Wall and -Werror
* Simplified to support only red/green leds
Change-Id: I53ab6ebd22b811e53824b738d1dea9e297c4817c
diff --git a/light/lights.c b/light/lights.c
new file mode 100644
index 0000000..61c6de2
--- /dev/null
+++ b/light/lights.c
@@ -0,0 +1,266 @@
+/*
+ * Copyright (C) 2014 The CyanogenMod 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.
+ */
+
+#include <cutils/log.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <hardware/lights.h>
+
+/******************************************************************************/
+
+#define MAX_PATH_SIZE 80
+
+#define LED_LIGHT_OFF 0
+#define LED_LIGHT_ON 255
+
+enum {
+ ATTENTION = 0,
+ NOTIFICATION,
+ BATTERY,
+ LIGHT_MAX,
+};
+
+static pthread_once_t g_init = PTHREAD_ONCE_INIT;
+static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
+static struct light_state_t g_lights[LIGHT_MAX];
+
+#define LCD_BRIGHTNESS_FILE "/sys/class/backlight/panel0-backlight/brightness"
+
+#define GREEN_LED_BREATH_FILE "/sys/class/leds/green/breath"
+#define GREEN_LED_BRIGHTNESS_FILE "/sys/class/leds/green/brightness"
+#define GREEN_LED_DELAY_OFF_FILE "/sys/class/leds/green/delay_off"
+#define GREEN_LED_DELAY_ON_FILE "/sys/class/leds/green/delay_on"
+
+#define RED_LED_BREATH_FILE "/sys/class/leds/red/breath"
+#define RED_LED_BRIGHTNESS_FILE "/sys/class/leds/red/brightness"
+#define RED_LED_DELAY_OFF_FILE "/sys/class/leds/red/delay_off"
+#define RED_LED_DELAY_ON_FILE "/sys/class/leds/red/delay_on"
+
+/**
+ * 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 = sprintf(buffer, "%d\n", value);
+ int amt = write(fd, buffer, 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(__attribute__((unused)) 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_BRIGHTNESS_FILE, brightness);
+ pthread_mutex_unlock(&g_lock);
+ return err;
+}
+
+static int set_light_locked(struct light_state_t const* state) {
+ int onMS, offMS;
+ int blink = 0;
+ int brightness_level;
+
+ switch (state->flashMode) {
+ case LIGHT_FLASH_TIMED:
+ case LIGHT_FLASH_HARDWARE:
+ offMS = state->flashOffMS;
+ onMS = state->flashOnMS;
+ break;
+ case LIGHT_FLASH_NONE:
+ default:
+ offMS = 0;
+ onMS = 0;
+ break;
+ }
+
+ if (onMS != 0 && offMS != 0) blink = 1;
+
+ if (is_lit(state))
+ brightness_level =
+ (state->color & 0xff000000) ? (state->color & 0xff000000) >> 24 : LED_LIGHT_ON;
+ else
+ brightness_level = LED_LIGHT_OFF;
+
+ if (blink) {
+ write_int(GREEN_LED_BREATH_FILE, 1);
+ write_int(GREEN_LED_DELAY_OFF_FILE, offMS);
+ write_int(GREEN_LED_DELAY_ON_FILE, onMS);
+ } else {
+ write_int(GREEN_LED_BRIGHTNESS_FILE, brightness_level);
+ }
+
+ return 0;
+}
+
+static int handle_led_prioritized_locked(struct light_state_t const* state) {
+ if (is_lit(&g_lights[ATTENTION]))
+ return set_light_locked(&g_lights[ATTENTION]);
+ else if (is_lit(&g_lights[NOTIFICATION]))
+ return set_light_locked(&g_lights[NOTIFICATION]);
+ else
+ return set_light_locked(state);
+}
+
+static int set_light_notifications(__attribute__((unused)) struct light_device_t* dev,
+ struct light_state_t const* state) {
+ int err = 0;
+ pthread_mutex_lock(&g_lock);
+ g_lights[NOTIFICATION] = *state;
+ err = handle_led_prioritized_locked(state);
+ pthread_mutex_unlock(&g_lock);
+ return err;
+}
+
+static int set_light_attention(__attribute__((unused)) struct light_device_t* dev,
+ struct light_state_t const* state) {
+ int err = 0;
+ pthread_mutex_lock(&g_lock);
+ g_lights[ATTENTION] = *state;
+ err = handle_led_prioritized_locked(state);
+ pthread_mutex_unlock(&g_lock);
+ return err;
+}
+
+static int set_light_battery(__attribute__((unused)) struct light_device_t* dev,
+ struct light_state_t const* state) {
+ int err = 0;
+
+ if (!dev) return -1;
+
+ pthread_mutex_lock(&g_lock);
+
+ int level = (state->color & 0xff000000) >> 24;
+
+ // sanity check
+ if (level < 0)
+ level = 0;
+ else if (level > 100)
+ level = 100;
+
+ // turn led off
+ write_int(GREEN_LED_BRIGHTNESS_FILE, LED_LIGHT_OFF);
+ write_int(RED_LED_BRIGHTNESS_FILE, LED_LIGHT_OFF);
+
+ if (is_lit(state)) {
+ if (level <= 15) {
+ write_int(RED_LED_BRIGHTNESS_FILE, 255);
+ } else if (level <= 99) {
+ write_int(GREEN_LED_BRIGHTNESS_FILE, 255);
+ write_int(RED_LED_BRIGHTNESS_FILE, 255);
+ } else {
+ write_int(GREEN_LED_BRIGHTNESS_FILE, 255);
+ }
+ }
+
+ 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 (strcmp(LIGHT_ID_BACKLIGHT, name) == 0)
+ set_light = set_light_backlight;
+ else if (strcmp(LIGHT_ID_NOTIFICATIONS, name) == 0)
+ set_light = set_light_notifications;
+ else if (strcmp(LIGHT_ID_ATTENTION, name) == 0)
+ set_light = set_light_attention;
+ else if (strcmp(LIGHT_ID_BATTERY, name) == 0)
+ set_light = set_light_battery;
+ else
+ return -EINVAL;
+
+ pthread_once(&g_init, init_globals);
+
+ struct light_device_t* dev = malloc(sizeof(struct light_device_t));
+ 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 = "MSM8916 lights Module",
+ .author = "Google, Inc.",
+ .methods = &lights_module_methods,
+};