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add liblights from source

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Kolja Dummann 2011-06-19 11:15:07 +02:00
parent a217cdb9d6
commit 6fe5788ec6
3 changed files with 371 additions and 0 deletions
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liblight/Android.mk Normal file
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# 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.GT-I9100
LOCAL_MODULE_TAGS := optional
include $(BUILD_SHARED_LIBRARY)

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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.
Unless required by applicable law or agreed to in writing, software
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/*
* Copyright (C) 2011 Kolja Dummann <k.dummann@gmail.com>
*
* 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"
#define LOG_NDEBUG 0
#include <cutils/log.h>
#include <stdint.h>
#include <string.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;
char const *const LCD_FILE = "/sys/class/backlight/pwm-backlight/brightness";
char const *const BUTTON_FILE = "/sys/devices/virtual/misc/melfas_touchkey/brightness";
static int write_int(char const *path, int value)
{
int fd;
static int already_warned;
already_warned = 0;
LOGV("write_int: path %s, value %d", path, value);
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 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 is_lit (struct light_state_t const* state) {
return state->color & 0xffffffff;
}
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;
}
static int set_light_buttons (struct light_device_t* dev,
struct light_state_t const* state) {
int err = 0;
int on = is_lit (state);
LOGV("%s state->color = %d is_lit = %d", __func__,state->color , on);
pthread_mutex_lock (&g_lock);
err = write_int (BUTTON_FILE, on?1:0);
pthread_mutex_unlock (&g_lock);
return 0;
}
static int close_lights(struct light_device_t *dev)
{
LOGV("close_light is called");
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);
LOGV("open_lights: open with %s", name);
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
return -EINVAL;
pthread_mutex_init(&g_lock, NULL);
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 = "lights Module",
.author = "Kolja Dummann <k.dummann@gmail.com>",
.methods = &lights_module_methods,
};