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/* Copyright (C) 2011 The Android Open Source Project
*
* Original code licensed under the Apache License, Version 2.0 (the "License");
* you may not use this software 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.
*
* This implements a lights hardware library for the Android emulator.
* the following code should be built as a shared library that will be
* placed into /system/lib/hw/lights.goldfish.so
*
* It will be loaded by the code in hardware/libhardware/hardware.c
* which is itself called from
* ./frameworks/base/services/jni/com_android_server_HardwareService.cpp
*/
#ifdef LOG_TAG
#undef LOG_TAG
#define LOG_TAG "Lights"
#endif
/* we connect with the emulator through the "hw-control" qemud service */
#define LIGHTS_SERVICE_NAME "hw-control"
#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>
#include <hardware/qemud.h>
/* Set to 1 to enable debug messages to the log */
#define DEBUG 0
#if DEBUG
# define D(...) ALOGD(__VA_ARGS__)
#else
# define D(...) do{}while(0)
#endif
#define E(...) ALOGE(__VA_ARGS__)
/* Get brightness(0~255) from state. */
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;
}
/* set backlight brightness by LIGHTS_SERVICE_NAME service. */
static int
set_light_backlight( struct light_device_t* dev, struct light_state_t const* state )
{
/* Get Lights service. */
int fd = qemud_channel_open( LIGHTS_SERVICE_NAME );
if (fd < 0) {
E( "%s: no qemud connection", __FUNCTION__ );
return -1;
}
D( "%s: On/Off %d/%d flashMode %d brightnessMode %d"
" RGB = 0x%08x", __func__,
state->flashOnMS,
state->flashOffMS,
state->flashMode,
state->brightnessMode,
state->color );
int brightness = rgb_to_brightness( state );
char buffer[64];
snprintf( buffer, sizeof(buffer), "power:light:brightness:lcd_backlight:%d", brightness );
D( "%s: lcd_backlight command: %s", __FUNCTION__, buffer );
/* send backlight command to perform the backlight setting. */
if (qemud_channel_send( fd, buffer, -1 ) < 0) {
E( "%s: could not query lcd_backlight: %s", __FUNCTION__, strerror(errno) );
close( fd );
return -1;
}
close( fd );
return 0;
}
static int
set_light_buttons( struct light_device_t* dev, struct light_state_t const* state )
{
/* @Waiting for later implementation. */
D( "%s: Not implemented.", __FUNCTION__ );
return 0;
}
static int
set_light_battery( struct light_device_t* dev, struct light_state_t const* state )
{
/* @Waiting for later implementation. */
D( "%s: Not implemented.", __FUNCTION__ );
return 0;
}
static int
set_light_keyboard( struct light_device_t* dev, struct light_state_t const* state )
{
/* @Waiting for later implementation. */
D( "%s: Not implemented.", __FUNCTION__ );
return 0;
}
static int
set_light_notifications( struct light_device_t* dev, struct light_state_t const* state )
{
/* @Waiting for later implementation. */
D( "%s: Not implemented.", __FUNCTION__ );
return 0;
}
static int
set_light_attention( struct light_device_t* dev, struct light_state_t const* state )
{
/* @Waiting for later implementation. */
D( "%s: Not implemented.", __FUNCTION__ );
return 0;
}
/** Close the lights device */
static int
close_lights( struct light_device_t *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 )
{
void* set_light;
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_notifications;
} else if (0 == strcmp( LIGHT_ID_ATTENTION, name )) {
set_light = set_light_attention;
} else {
D( "%s: %s light isn't supported yet.", __FUNCTION__, name );
return -EINVAL;
}
struct light_device_t *dev = malloc( sizeof(struct light_device_t) );
if (dev == NULL) {
return -EINVAL;
}
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 emulator 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 = "Goldfish lights Module",
.author = "The Android Open Source Project",
.methods = &lights_module_methods,
};
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