copy sholes liblights (including the history)

Change-Id: I06edb65e37ba3ba0eb2bf9b9daca6468dc32b7d1

liblights/Android.mk

@@ -0,0 +1,31 @@
+# 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.
+
+
+LOCAL_PATH:= $(call my-dir)
+# HAL module implemenation, not prelinked and stored in
+# hw/<COPYPIX_HARDWARE_MODULE_ID>.<ro.board.platform>.so
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := lights.c
+
+LOCAL_PRELINK_MODULE := false
+LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
+
+LOCAL_SHARED_LIBRARIES := liblog
+
+LOCAL_MODULE := lights.sholes
+LOCAL_MODULE_TAGS:= optional
+
+include $(BUILD_SHARED_LIBRARY)

liblights/lights.c

@@ -0,0 +1,365 @@
+/*
+ * 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_TAG "lights"
+
+#include <cutils/log.h>
+
+#include <stdint.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>
+
+// taken from led-lm3530.h in kernel source, these are als modes
+#define MANUAL          0
+#define AUTOMATIC       1
+#define MANUAL_SENSOR   2
+
+/******************************************************************************/
+
+static pthread_once_t g_init = PTHREAD_ONCE_INIT;
+static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
+
+char const*const LCD_FILE
+        = "/sys/class/leds/lcd-backlight/brightness";
+char const*const ALS_FILE
+        = "/sys/class/leds/lcd-backlight/als";
+
+char const*const KEYBOARD_FILE
+        = "/sys/class/leds/keyboard-backlight/brightness";
+char const*const BUTTON_FILE
+        = "/sys/class/leds/button-backlight/brightness";
+
+/*RGB file descriptors */
+char const*const RED_LED_FILE
+        = "/sys/class/leds/red/brightness";
+char const*const RED_BLINK_FILE
+        = "/sys/class/leds/red/blink";
+char const*const GREEN_LED_FILE
+        = "/sys/class/leds/green/brightness";
+char const*const BLUE_LED_FILE
+        = "/sys/class/leds/blue/brightness";
+
+static unsigned int colorstate = 0;
+static int blinkstate = 0;
+static unsigned int lastnotificationcolor = 0;
+static int lastnotificationblink = 0;
+static int lowbattery = 0;
+
+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) {
+            LOGE("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 als_mode;
+
+    int brightness = rgb_to_brightness(state);
+
+    switch(state->brightnessMode) {
+        case BRIGHTNESS_MODE_SENSOR:
+            als_mode = AUTOMATIC;
+            break;
+        case BRIGHTNESS_MODE_USER:
+        default:
+            als_mode = MANUAL_SENSOR;
+            break;
+    }
+
+    pthread_mutex_lock(&g_lock);
+    err = write_int(ALS_FILE, als_mode);
+    err = write_int(LCD_FILE, brightness);
+    pthread_mutex_unlock(&g_lock);
+
+    return err;
+}
+
+static int
+set_light_keyboard(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(KEYBOARD_FILE, on ? 255:0);
+    pthread_mutex_unlock(&g_lock);
+
+    return err;
+}
+
+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
+set_light_locked(unsigned int color, int blink)
+{
+    int err = 0;
+    int red, green, blue;
+
+    if(colorstate == color &&
+            blinkstate == blink) {
+        // don't bother changing if we don't have to
+        return 0;
+    } else {
+        colorstate = color;
+        blinkstate = blink;
+    }
+
+    red = (color >> 16) & 0xFF;
+    green = (color >> 8) & 0xFF;
+    blue = color & 0xFF;
+
+    // ensure blinking is off
+    err = write_int(RED_BLINK_FILE, 0);
+
+    // set colors
+    err = write_int(RED_LED_FILE, red);
+    err = write_int(GREEN_LED_FILE, green);
+    err = write_int(BLUE_LED_FILE, blue);
+
+    // blink if supposed to
+    if (blink) {
+        err = write_int(RED_BLINK_FILE, 255);
+    }
+    return err;
+}
+
+static int
+set_light_battery(struct light_device_t* dev,
+        struct light_state_t const* state)
+{
+    int err = 0;
+    int blink;
+
+    switch (state->flashMode) {
+        case LIGHT_FLASH_HARDWARE:
+        case LIGHT_FLASH_TIMED:
+            blink = 1;
+            break;
+        case LIGHT_FLASH_NONE:
+        default:
+            blink = 0;
+            break;
+    }
+#if 0
+    LOGD("set_light_battery color=%08X, blink=%d****************\n",
+            state->color, blink);
+#endif
+    if (state->color == 0xffff0000) {
+        lowbattery = 1;
+        err = set_light_locked(state->color, blink);
+    } else if (lowbattery == 1) {
+        lowbattery = 0;
+        err = set_light_locked(lastnotificationcolor, lastnotificationblink);
+    }
+
+    return err;
+}
+
+static int
+set_light_notification(struct light_device_t* dev,
+        struct light_state_t const* state)
+{
+    int err = 0;
+    int blink;
+
+    switch (state->flashMode) {
+       case LIGHT_FLASH_HARDWARE:
+       case LIGHT_FLASH_TIMED:
+            blink = 1;
+            break;
+        case LIGHT_FLASH_NONE:
+        default:
+            blink = 0;
+            break;
+    }
+#if 0
+    LOGD("set_light_notification color=%08X, blink=%d****************\n",
+            state->color, blink);
+#endif
+    lastnotificationcolor = state->color;
+    lastnotificationblink = blink;
+    if (lowbattery == 0) {
+        err = set_light_locked(state->color, blink);
+    }
+
+    return err;
+}
+
+static int
+set_light_attention(struct light_device_t* dev,
+        struct light_state_t const* state)
+{
+    int err = 0;
+
+    /**
+     * we don't have a defined attention light, so ignore these
+     *
+
+    int blink;
+
+    switch (state->flashMode) {
+        case LIGHT_FLASH_HARDWARE:
+        case LIGHT_FLASH_TIMED:
+            blink = 1;
+            break;
+        case LIGHT_FLASH_NONE:
+        default:
+            blink = 0;
+            break;
+    }
+
+    LOGD("set_light_attention color=%08X, blink=%d****************\n",
+            state->color, blink);
+
+    err = set_light_locked(state->color, blink);
+
+     *
+     */
+
+    return err;
+}
+
+static int
+close_lights(struct light_device_t *dev)
+{
+    if (dev) {
+        free(dev);
+    }
+    return 0;
+}
+
+
+/******************************************************************************/
+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_KEYBOARD, name)) {
+        set_light = set_light_keyboard;
+    }
+    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_notification;
+    }
+    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));
+    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,
+};
+
+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 = "TI OMAP lights Module",
+    .author = "Google, Inc.",
+    .methods = &lights_module_methods,
+};