127 lines
2.9 KiB
C
Executable file
127 lines
2.9 KiB
C
Executable file
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "lights"
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#define LOGE ALOGE
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#include <cutils/log.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <hardware/lights.h>
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#include <hardware/hardware.h>
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#include "drv_display.h"
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static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
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int fd =0;
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static int rgb_to_brightness(struct light_state_t const *state)
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{
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int color = state->color & 0x00ffffff;
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return ((77 * ((color >> 16) & 0x00ff))
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+ (150 * ((color >> 8) & 0x00ff)) +
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(29 * (color & 0x00ff))) >> 8;
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}
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static int set_light_backlight(struct light_device_t *dev,
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struct light_state_t const *state)
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{
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(void)dev;
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int brightness = rgb_to_brightness(state);
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unsigned long args[3];
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int err = 0;
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pthread_mutex_lock(&g_lock);
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args[0] = 0;
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args[1] = brightness;
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args[2] = 0;
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err = ioctl(fd,DISP_CMD_LCD_SET_BRIGHTNESS,args);
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pthread_mutex_unlock(&g_lock);
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return err;
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}
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/** Close the lights device */
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static int close_lights(struct light_device_t *dev)
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{
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if(fd != 0)
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{
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close(fd);
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}
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if (dev)
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free(dev);
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return 0;
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}
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/** Open a new instance of a lights device using name */
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static int open_lights(const struct hw_module_t *module, char const *name,
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struct hw_device_t **device)
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{
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int (*set_light) (struct light_device_t *dev,
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struct light_state_t const *state);
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if (0 == strcmp(LIGHT_ID_BACKLIGHT, name))
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{
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set_light = set_light_backlight;
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fd = open("/dev/disp", O_RDONLY);
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}
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else
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return -EINVAL;
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pthread_mutex_init(&g_lock, NULL);
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struct light_device_t *dev = malloc(sizeof(struct light_device_t));
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memset(dev, 0, sizeof(*dev));
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dev->common.tag = HARDWARE_DEVICE_TAG;
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dev->common.version = 0;
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dev->common.module = (struct hw_module_t *)module;
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dev->common.close = (int (*)(struct hw_device_t *))close_lights;
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dev->set_light = set_light;
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*device = (struct hw_device_t *)dev;
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return 0;
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}
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static struct hw_module_methods_t lights_methods =
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{
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.open = open_lights,
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};
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/*
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* The backlight Module
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*/
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struct hw_module_t HAL_MODULE_INFO_SYM =
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{
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.tag = HARDWARE_MODULE_TAG,
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.version_major = 1,
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.version_minor = 0,
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.id = LIGHTS_HARDWARE_MODULE_ID,
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.name = "SoftWinner lights Module",
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.author = "SOFTWINNER",
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.methods = &lights_methods,
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};
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