diff options
Diffstat (limited to 'liblights/lights.c')
| -rw-r--r-- | liblights/lights.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/liblights/lights.c b/liblights/lights.c new file mode 100644 index 0000000..06bb5f8 --- /dev/null +++ b/liblights/lights.c @@ -0,0 +1,240 @@ +/* + * Copyright (C) 2011 The Android Open Source Project + * Copyright (C) 2011 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" +#define LOG_NDEBUG 0 + +#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> + +/******************************************************************************/ + +static pthread_once_t g_init = PTHREAD_ONCE_INIT; +static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER; +static int g_enable_touchlight = -1; + +char const*const PANEL_FILE + = "/sys/class/backlight/panel/brightness"; + +char const*const BUTTON_POWER + = "/sys/class/sec/sec_touchkey/enable_disable"; + +char const*const BUTTON_FILE + = "/sys/class/sec/sec_touchkey/brightness"; + +void init_globals(void) +{ + // init the mutex + pthread_mutex_init(&g_lock, NULL); +} + +void +load_settings() +{ + FILE* fp = fopen("/data/.disable_touchlight", "r"); + if (!fp) { + g_enable_touchlight = 1; + } else { + g_enable_touchlight = (int)(fgetc(fp)); + if (g_enable_touchlight == '1') + g_enable_touchlight = 1; + else + g_enable_touchlight = 0; + + fclose(fp); + } +} + +static int +write_int(char const* path, int value) +{ + int fd; + static int already_warned = 0; + + 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 +is_lit(struct light_state_t const* state) +{ + return state->color & 0x00ffffff; +} + +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 +set_light_backlight(struct light_device_t* dev, + struct light_state_t const* state) +{ + load_settings(); + + int err = 0; + int brightness = rgb_to_brightness(state); + + pthread_mutex_lock(&g_lock); + err = write_int(PANEL_FILE, brightness); + + if (g_enable_touchlight == -1 || g_enable_touchlight > 0) + err = write_int(BUTTON_FILE, brightness > 0 ? 1 : 0); + + pthread_mutex_unlock(&g_lock); + + return err; +} + +static int +set_light_keyboard(struct light_device_t* dev, + struct light_state_t const* state) +{ + return 0; +} + +static int +set_light_buttons(struct light_device_t* dev, + struct light_state_t const* state) +{ + int err = 0; + int on = is_lit(state); + + pthread_mutex_lock(&g_lock); + LOGD("set_light_button on=%d\n", on ? 1 : 0); + err = write_int(BUTTON_FILE, on ? 1:0); + pthread_mutex_unlock(&g_lock); + + return err; +} + +static int +set_light_battery(struct light_device_t* dev, + struct light_state_t const* state) +{ + return 0; +} + +static int +set_light_notification(struct light_device_t* dev, + struct light_state_t const* state) +{ + return 0; +} + +static int +set_light_attention(struct light_device_t* dev, + struct light_state_t const* state) +{ + return 0; +} + +static int +close_lights(struct light_device_t *dev) +{ + 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); + + 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_notification; + } + else if (0 == strcmp(LIGHT_ID_ATTENTION, name)) { + set_light = set_light_attention; + } + else { + return -EINVAL; + } + + pthread_once(&g_init, init_globals); + + 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 = "Samsung Exynos4210 Lights Module", + .author = "The CyanogenMod Project", + .methods = &lights_module_methods, +}; |