wayne: Initial bringup

Change-Id: I211da5781d8c7a16199fd8a18e1b00cfc9e01944
Signed-off-by: Isaac Chen <isaacchen@isaacchen.cn>

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,
+};