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341 lines
8.9 KiB
341 lines
8.9 KiB
/*
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* Copyright (C) 2012 The Android Open Source Project
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* The CyanogenMod Project
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* Daniel Hillenbrand <codeworkx@cyanogenmod.com>
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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 LOG_NDEBUG 0
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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 <pthread.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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/******************************************************************************/
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static pthread_once_t g_init = PTHREAD_ONCE_INIT;
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static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
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char const*const PANEL_FILE = "/sys/class/backlight/panel/brightness";
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#ifndef EXYNOS4X12_TABLET
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char const*const BUTTON_FILE = "/sys/class/sec/sec_touchkey/brightness";
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char const*const LED_RED = "/sys/class/sec/led/led_r";
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char const*const LED_GREEN = "/sys/class/sec/led/led_g";
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char const*const LED_BLUE = "/sys/class/sec/led/led_b";
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char const*const LED_BLINK = "/sys/class/sec/led/led_blink";
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char const*const LED_BRIGHTNESS = "/sys/class/sec/led/led_br_lev";
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#endif
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#define MAX_WRITE_CMD 25
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struct led_config {
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int red;
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int green;
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int blue;
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char blink[MAX_WRITE_CMD];
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};
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struct led_config g_BatteryStore;
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void init_g_lock(void)
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{
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pthread_mutex_init(&g_lock, NULL);
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}
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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;
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already_warned = 0;
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ALOGV("write_int: path %s, value %d", path, value);
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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 == 0) {
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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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static int read_int(char const *path)
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{
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int fd;
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char buffer[2];
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fd = open(path, O_RDONLY);
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if (fd >= 0) {
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read(fd, buffer, 1);
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}
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close(fd);
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return atoi(buffer);
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}
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static int write_str(char const *path, const char* value)
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{
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int fd;
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static int already_warned;
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already_warned = 0;
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ALOGV("write_str: path %s, value %s", path, value);
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fd = open(path, O_RDWR);
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if (fd >= 0) {
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char buffer[MAX_WRITE_CMD];
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int bytes = sprintf(buffer, "%s\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 == 0) {
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ALOGE("write_str 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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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)) + (29*(color & 0x00ff))) >> 8;
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}
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static int get_dimmed_color(struct light_state_t const *state, int brightness)
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{
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int red = (state->color >> 16) & 0xFF;
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int green = ((state->color >> 8) & 0xFF) * 0.7;
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int blue = (state->color & 0x00FF) * 0.7;
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return (((red * brightness) / 255) << 16) + (((green * brightness) / 255) << 8) + ((blue * brightness) / 255);
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}
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/* Panel backlight */
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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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int err = 0;
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int brightness = rgb_to_brightness(state);
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int previous_brightness = read_int(PANEL_FILE);
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pthread_mutex_lock(&g_lock);
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err = write_int(PANEL_FILE, brightness);
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pthread_mutex_unlock(&g_lock);
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return err;
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}
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/* Touchkey backlight */
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static int
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set_light_buttons(struct light_device_t* dev,
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struct light_state_t const* state)
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{
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#ifdef EXYNOS4X12_TABLET
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return 0;
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#else
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int err = 0;
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int brightness = rgb_to_brightness(state);
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pthread_mutex_lock(&g_lock);
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ALOGD("set_light_buttons: %d\n", brightness > 0 ? 1 : 2);
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err = write_int(BUTTON_FILE, brightness > 0 ? 1 : 2);
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pthread_mutex_unlock(&g_lock);
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return err;
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#endif
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}
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/* LEDs */
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static int write_leds(struct led_config led)
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{
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int err = 0;
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#ifndef EXYNOS4X12_TABLET
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pthread_mutex_lock(&g_lock);
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err = write_int(LED_RED, led.red);
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err = write_int(LED_GREEN, led.green);
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err = write_int(LED_BLUE, led.blue);
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err = write_str(LED_BLINK, led.blink);
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pthread_mutex_unlock(&g_lock);
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#endif
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return err;
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}
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static int set_light_leds(struct light_state_t const *state, int type)
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{
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#ifdef EXYNOS4X12_TABLET
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return 0;
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#else
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struct led_config led;
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unsigned int colorRGB;
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colorRGB = get_dimmed_color(state, 200);
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switch (state->flashMode) {
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case LIGHT_FLASH_NONE:
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// use battery led state stored
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if (g_BatteryStore.blink == NULL) {
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led.red = 0;
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led.green = 0;
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led.blue = 0;
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snprintf(g_BatteryStore.blink, MAX_WRITE_CMD, "0x000000 0 0");
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}
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led = g_BatteryStore;
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break;
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case LIGHT_FLASH_TIMED:
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case LIGHT_FLASH_HARDWARE:
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led.red = (colorRGB >> 16) & 0xFF;
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led.green = (colorRGB >> 8) & 0xFF;
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led.blue = colorRGB & 0xFF;
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snprintf(led.blink, MAX_WRITE_CMD, "0x%x %d %d", colorRGB, state->flashOnMS, state->flashOffMS);
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ALOGD("set_light_leds 0x%x %d %d", colorRGB, state->flashOnMS, state->flashOffMS);
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break;
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default:
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return -EINVAL;
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}
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return write_leds(led);
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#endif
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}
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static int set_light_leds_notifications(struct light_device_t *dev,
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struct light_state_t const *state)
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{
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return set_light_leds(state, 0);
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}
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static int set_light_battery(struct light_device_t *dev,
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struct light_state_t const *state)
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{
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#ifdef EXYNOS4X12_TABLET
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return 0;
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#else
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struct led_config led;
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int brightness = rgb_to_brightness(state);
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unsigned int colorRGB;
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colorRGB = get_dimmed_color(state, 20);
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if (brightness == 0) {
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led.red = 0;
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led.green = 0;
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led.blue = 0;
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snprintf(led.blink, MAX_WRITE_CMD, "0x000000 0 0");
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} else {
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led.red = (colorRGB >> 16) & 0xFF;
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led.green = (colorRGB >> 8) & 0xFF;
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led.blue = colorRGB & 0xFF;
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snprintf(led.blink, MAX_WRITE_CMD, "0x%x %d %d", colorRGB, state->flashOnMS, state->flashOffMS);
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ALOGD("set_light_battery 0x%x %d %d", colorRGB, state->flashOnMS, state->flashOffMS);
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}
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g_BatteryStore = led;
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return write_leds(led);
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#endif
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}
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static int set_light_leds_attention(struct light_device_t *dev,
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struct light_state_t const *state)
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{
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return set_light_leds(state, 1);
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}
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static int close_lights(struct light_device_t *dev)
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{
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ALOGV("close_light is called");
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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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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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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_leds_notifications;
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else if (0 == strcmp(LIGHT_ID_ATTENTION, name))
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set_light = set_light_leds_attention;
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else if (0 == strcmp(LIGHT_ID_BATTERY, name))
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set_light = set_light_battery;
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else
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return -EINVAL;
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pthread_once(&g_init, init_g_lock);
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g_BatteryStore.red = 0;
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g_BatteryStore.green = 0;
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g_BatteryStore.blue = 0;
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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_module_methods = {
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.open = open_lights,
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};
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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 = "Exynos4x12 lights Module",
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.author = "The CyanogenMod Project",
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.methods = &lights_module_methods,
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};
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