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liblights: Add BLN support

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Change-Id: I859416c484777fcf08b5bf8f72ba9f9838e4c1b3
tirimbino
Arnab Chaudhuri 9 years ago
parent 067a82c50a
commit a958e7e7ac
4 changed files with 394 additions and 1 deletions
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  1. 5
      exynos4/exynos4210/Android.mk
  2. 31
      exynos4/exynos4210/liblightsbln/Android.mk
  3. 188
      exynos4/exynos4210/liblightsbln/LICENSE
  4. 169
      exynos4/exynos4210/liblightsbln/lights.c

5
exynos4/exynos4210/Android.mk
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@ -15,7 +15,12 @@
#
ifeq ($(TARGET_BOARD_PLATFORM),exynos4)
ifeq ($(BOARD_HAS_BLN),true)
exynos4210_dirs := liblightsbln
else
exynos4210_dirs := liblights
endif
include $(call all-named-subdir-makefiles,$(exynos4210_dirs))

31
exynos4/exynos4210/liblightsbln/Android.mk
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# Copyright (C) 2012 The CyanogenMod 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 := $(TARGET_OUT_SHARED_LIBRARIES)/hw
LOCAL_SHARED_LIBRARIES := liblog
LOCAL_MODULE := lights.$(TARGET_BOARD_PLATFORM)
LOCAL_MODULE_TAGS := optional
include $(BUILD_SHARED_LIBRARY)

188
exynos4/exynos4210/liblightsbln/LICENSE
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Copyright (C) 2012 The CyanogenMod 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
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.
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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169
exynos4/exynos4210/liblightsbln/lights.c
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/*
* Copyright (C) 2012 The CyanogenMod 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 <sys/ioctl.h>
#include <sys/types.h>
#include <hardware/lights.h>
#include <hardware/hardware.h>
static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
/** Paths to light files **/
char const *const BACKLIGHT_FILE = "/sys/class/backlight/panel/brightness";
char const *const BUTTON_FILE = "/sys/class/sec/sec_touchkey/brightness";
char const *const NOTIFICATION_FILE = "/sys/class/misc/backlightnotification/notification_led";
/** Write integer to file **/
static int write_int(char const *path, int value)
{
int fd;
static int already_warned = -1;
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 == -1) {
ALOGE("write_int failed to open %s\n", path);
already_warned = 1;
}
return -errno;
}
}
/** Convert RGB to 0-255 integer **/
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;
}
/** Is light already enabled? **/
static int is_lit(struct light_state_t const* state)
{
return state->color & 0x00ffffff;
}
/** Set LCD backlight **/
static int set_light_backlight(struct light_device_t *dev, struct light_state_t const *state)
{
pthread_mutex_lock(&g_lock);
int err = write_int(BACKLIGHT_FILE, rgb_to_brightness(state));
pthread_mutex_unlock(&g_lock);
return err;
}
/** Set buttons backlight **/
static int set_light_buttons(struct light_device_t* dev, struct light_state_t const* state)
{
int err = 0;
pthread_mutex_lock (&g_lock);
if(is_lit(state))
err = write_int(BUTTON_FILE, 1);
else
err = write_int(BUTTON_FILE, 0);
pthread_mutex_unlock (&g_lock);
return err;
}
/** Set buttons backlight as BLN **/
static int set_light_notifications(struct light_device_t* dev, struct light_state_t const* state)
{
int err = 0;
pthread_mutex_lock (&g_lock);
if(is_lit(state))
err = write_int(NOTIFICATION_FILE, 1);
else
err = write_int(NOTIFICATION_FILE, 0);
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;
}
/** 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)
{
pthread_t lighting_poll_thread;
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_BUTTONS, name))
set_light = set_light_buttons;
else if (0 == strcmp(LIGHT_ID_NOTIFICATIONS, name))
set_light = set_light_notifications;
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;
}
/** Method list **/
static struct hw_module_methods_t lights_methods =
{
.open = open_lights,
};
/** The backlight 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 = "The CyanogenMod Project",
.methods = &lights_methods,
};
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