Arnab Chaudhuri
9 years ago
parent
067a82c50a
commit
a958e7e7ac
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# Copyright (C) 2012 The CyanogenMod 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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LOCAL_PATH:= $(call my-dir)
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# HAL module implemenation, not prelinked and stored in
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# hw/<COPYPIX_HARDWARE_MODULE_ID>.<ro.board.platform>.so
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include $(CLEAR_VARS) |
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LOCAL_SRC_FILES := lights.c
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LOCAL_PRELINK_MODULE := false
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LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
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LOCAL_SHARED_LIBRARIES := liblog
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LOCAL_MODULE := lights.$(TARGET_BOARD_PLATFORM)
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LOCAL_MODULE_TAGS := optional
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include $(BUILD_SHARED_LIBRARY) |
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@ -0,0 +1,188 @@ |
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Copyright (C) 2012 The CyanogenMod Project |
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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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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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Apache License |
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Version 2.0, January 2004 |
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http://www.apache.org/licenses/ |
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TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION |
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END OF TERMS AND CONDITIONS |
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@ -0,0 +1,169 @@ |
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/*
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* Copyright (C) 2012 The CyanogenMod 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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#include <cutils/log.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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static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER; |
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/** Paths to light files **/ |
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char const *const BACKLIGHT_FILE = "/sys/class/backlight/panel/brightness"; |
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char const *const BUTTON_FILE = "/sys/class/sec/sec_touchkey/brightness"; |
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char const *const NOTIFICATION_FILE = "/sys/class/misc/backlightnotification/notification_led"; |
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/** Write integer to file **/ |
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static int write_int(char const *path, int value) |
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{ |
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int fd; |
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static int already_warned = -1; |
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fd = open(path, O_RDWR); |
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if (fd >= 0) { |
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char buffer[20]; |
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int bytes = sprintf(buffer, "%d\n", value); |
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int amt = write(fd, buffer, bytes); |
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close(fd); |
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return amt == -1 ? -errno : 0; |
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} else { |
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if (already_warned == -1) { |
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ALOGE("write_int failed to open %s\n", path); |
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already_warned = 1; |
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} |
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return -errno; |
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} |
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} |
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/** Convert RGB to 0-255 integer **/ |
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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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/** Is light already enabled? **/ |
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static int is_lit(struct light_state_t const* state) |
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{ |
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return state->color & 0x00ffffff; |
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} |
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/** Set LCD backlight **/ |
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static int set_light_backlight(struct light_device_t *dev, struct light_state_t const *state) |
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{ |
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pthread_mutex_lock(&g_lock); |
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int err = write_int(BACKLIGHT_FILE, rgb_to_brightness(state)); |
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pthread_mutex_unlock(&g_lock); |
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return err; |
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} |
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/** Set buttons backlight **/ |
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static int set_light_buttons(struct light_device_t* dev, struct light_state_t const* state) |
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{ |
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int err = 0; |
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pthread_mutex_lock (&g_lock); |
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if(is_lit(state)) |
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err = write_int(BUTTON_FILE, 1); |
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else |
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err = write_int(BUTTON_FILE, 0); |
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pthread_mutex_unlock (&g_lock); |
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return err; |
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} |
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/** Set buttons backlight as BLN **/ |
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static int set_light_notifications(struct light_device_t* dev, struct light_state_t const* state) |
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{ |
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int err = 0; |
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pthread_mutex_lock (&g_lock); |
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if(is_lit(state)) |
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err = write_int(NOTIFICATION_FILE, 1); |
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else |
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err = write_int(NOTIFICATION_FILE, 0); |
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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 (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, |
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char const *name, struct hw_device_t **device) |
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{ |
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pthread_t lighting_poll_thread; |
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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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set_light = set_light_backlight; |
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else if (0 == strcmp(LIGHT_ID_BUTTONS, name)) |
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set_light = set_light_buttons; |
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else if (0 == strcmp(LIGHT_ID_NOTIFICATIONS, name)) |
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set_light = set_light_notifications; |
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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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/** Method list **/ |
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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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/** The backlight module **/ |
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struct hw_module_t HAL_MODULE_INFO_SYM = { |
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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 = "Lights module", |
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.author = "The CyanogenMod Project", |
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.methods = &lights_methods, |
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}; |
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