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435 lines
12 KiB
435 lines
12 KiB
/*
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* Copyright (C) 2014, 2017-2018 The Linux Foundation. All rights reserved.
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* Not a contribution
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* Copyright (C) 2008 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_NDEBUG 0
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#include <log/log.h>
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#include <cutils/properties.h>
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#include <stdint.h>
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#include <stdlib.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 <linux/msm_mdp.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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* Change this to 1 to support battery notifications via BatteryService
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*/
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#define LIGHTS_SUPPORT_BATTERY 0
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#define CG_COLOR_ID_PROPERTY "ro.boot.hardware.color"
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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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static struct light_state_t g_notification;
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static struct light_state_t g_battery;
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static int g_last_backlight_mode = BRIGHTNESS_MODE_USER;
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static int g_attention = 0;
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static int rgb_brightness_ratio = 255;
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static bool g_has_persistence_node = false;
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char const*const RED_LED_FILE
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= "/sys/class/leds/red/brightness";
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char const*const GREEN_LED_FILE
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= "/sys/class/leds/green/brightness";
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char const*const BLUE_LED_FILE
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= "/sys/class/leds/blue/brightness";
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char const*const LCD_FILE
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= "/sys/class/backlight/panel0-backlight/brightness";
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char const*const PERSISTENCE_FILE
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= "/sys/class/backlight/panel0-backlight/vr_mode";
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char const*const BUTTON_FILE
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= "/sys/class/leds/button-backlight/brightness";
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char const*const RED_BLINK_FILE
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= "/sys/class/leds/red/blink";
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char const*const GREEN_BLINK_FILE
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= "/sys/class/leds/green/blink";
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char const*const BLUE_BLINK_FILE
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= "/sys/class/leds/blue/blink";
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char const*const RED_ON_OFF_MS_FILE
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= "/sys/class/leds/red/on_off_ms";
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char const*const GREEN_ON_OFF_MS_FILE
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= "/sys/class/leds/green/on_off_ms";
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char const*const BLUE_ON_OFF_MS_FILE
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= "/sys/class/leds/blue/on_off_ms";
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char const*const RED_RGB_START_FILE
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= "/sys/class/leds/red/rgb_start";
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char const*const GREEN_RGB_START_FILE
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= "/sys/class/leds/green/rgb_start";
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char const*const BLUE_RGB_START_FILE
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= "/sys/class/leds/blue/rgb_start";
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/**
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* device methods
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*/
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void init_globals(void)
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{
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char color_id_prop[PROPERTY_VALUE_MAX] = {""};
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// init the mutex
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pthread_mutex_init(&g_lock, NULL);
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// check CG color
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property_get(CG_COLOR_ID_PROPERTY, color_id_prop, "DEF00");
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if (strcmp(color_id_prop, "GRA00") == 0) {
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rgb_brightness_ratio = 25;
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} else if (strcmp(color_id_prop, "SLV00") == 0) {
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rgb_brightness_ratio = 15;
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} else if (strcmp(color_id_prop, "BLU00") == 0) {
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rgb_brightness_ratio = 15;
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} else {
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rgb_brightness_ratio = 20;
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}
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}
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static int
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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 = 0;
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fd = open(path, O_WRONLY);
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if (fd >= 0) {
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char buffer[20];
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ssize_t amt;
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size_t bytes = snprintf(buffer, sizeof(buffer), "%d\n", value);
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if(bytes < sizeof(buffer)) {
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amt = write(fd, buffer, bytes);
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} else {
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amt = -1;
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errno = -EINVAL;
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}
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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
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write_double_int(char const* path, int value1, int value2)
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{
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int fd;
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static int already_warned = 0;
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fd = open(path, O_WRONLY);
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if (fd >= 0) {
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char buffer[20];
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ssize_t amt;
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size_t bytes = snprintf(buffer, sizeof(buffer), "%d %d\n", value1, value2);
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if(bytes < sizeof(buffer)) {
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amt = write(fd, buffer, bytes);
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} else {
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amt = -1;
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errno = -EINVAL;
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}
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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
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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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static int
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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
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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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unsigned int lpEnabled =
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state->brightnessMode == BRIGHTNESS_MODE_LOW_PERSISTENCE;
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if(!dev) {
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return -1;
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}
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// The HAL requires that when low-persistence is requested, errors occur in only
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// one case: if VR mode is unsupported. So if the display just doesn't happen to
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// be in the right state for VR mode (an error case in the SDM845 kernel driver),
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// suppress the error.
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bool suppress_persistence_error = false;
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pthread_mutex_lock(&g_lock);
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// Toggle low persistence mode state
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bool persistence_mode = ((g_last_backlight_mode != state->brightnessMode && lpEnabled) ||
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(!lpEnabled &&
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g_last_backlight_mode == BRIGHTNESS_MODE_LOW_PERSISTENCE));
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bool cannot_handle_persistence = !g_has_persistence_node && persistence_mode;
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if (g_has_persistence_node) {
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if (persistence_mode) {
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if ((err = write_int(PERSISTENCE_FILE, lpEnabled)) != 0) {
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ALOGE("%s: Failed to write to %s: %s\n", __FUNCTION__,
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PERSISTENCE_FILE, strerror(errno));
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suppress_persistence_error = true;
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}
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}
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g_last_backlight_mode = state->brightnessMode;
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}
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g_last_backlight_mode = state->brightnessMode;
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if (!err && !lpEnabled) {
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err = write_int(LCD_FILE, brightness);
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}
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pthread_mutex_unlock(&g_lock);
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if (suppress_persistence_error) {
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return 0;
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} else {
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return cannot_handle_persistence ? -ENOSYS : err;
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}
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}
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static int
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set_speaker_light_locked(struct light_device_t* dev,
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struct light_state_t const* state)
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{
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int red, green, blue;
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int blink;
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int onMS, offMS;
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unsigned int colorRGB;
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if(!dev) {
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return -1;
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}
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switch (state->flashMode) {
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case LIGHT_FLASH_TIMED:
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onMS = state->flashOnMS;
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offMS = state->flashOffMS;
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break;
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case LIGHT_FLASH_NONE:
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default:
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onMS = 0;
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offMS = 0;
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break;
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}
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colorRGB = state->color;
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#if 0
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ALOGD("set_speaker_light_locked mode %d, colorRGB=%08X, onMS=%d, offMS=%d\n",
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state->flashMode, colorRGB, onMS, offMS);
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#endif
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red = ((colorRGB >> 16) & 0xFF) * rgb_brightness_ratio / 255;
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green = ((colorRGB >> 8) & 0xFF) * rgb_brightness_ratio / 255;
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blue = (colorRGB & 0xFF) * rgb_brightness_ratio / 255;
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write_double_int(RED_ON_OFF_MS_FILE, onMS, offMS);
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write_int(RED_LED_FILE, red);
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write_double_int(GREEN_ON_OFF_MS_FILE, onMS, offMS);
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write_int(GREEN_LED_FILE, green);
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write_double_int(BLUE_ON_OFF_MS_FILE, onMS, offMS);
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write_int(BLUE_LED_FILE, blue);
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if(!write_int(RED_RGB_START_FILE, 1))
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if(!write_int(GREEN_RGB_START_FILE, 1))
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if(!write_int(BLUE_RGB_START_FILE, 1))
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return -1;
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return 0;
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}
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static void
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handle_speaker_battery_locked(struct light_device_t* dev)
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{
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if (is_lit(&g_battery)) {
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set_speaker_light_locked(dev, &g_battery);
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} else {
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set_speaker_light_locked(dev, &g_notification);
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}
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}
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static int
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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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pthread_mutex_lock(&g_lock);
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g_battery = *state;
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handle_speaker_battery_locked(dev);
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pthread_mutex_unlock(&g_lock);
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return 0;
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}
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static int
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set_light_notifications(struct light_device_t* dev,
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struct light_state_t const* state)
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{
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pthread_mutex_lock(&g_lock);
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g_notification = *state;
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handle_speaker_battery_locked(dev);
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pthread_mutex_unlock(&g_lock);
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return 0;
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}
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static int
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set_light_attention(struct light_device_t* dev,
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struct light_state_t const* state)
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{
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pthread_mutex_lock(&g_lock);
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if (state->flashMode == LIGHT_FLASH_HARDWARE) {
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g_attention = state->flashOnMS;
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} else if (state->flashMode == LIGHT_FLASH_NONE) {
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g_attention = 0;
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}
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handle_speaker_battery_locked(dev);
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pthread_mutex_unlock(&g_lock);
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return 0;
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}
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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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int err = 0;
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if(!dev) {
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return -1;
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}
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pthread_mutex_lock(&g_lock);
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err = write_int(BUTTON_FILE, state->color & 0xFF);
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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
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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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}
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return 0;
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}
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/******************************************************************************/
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/**
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* module methods
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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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g_has_persistence_node = !access(PERSISTENCE_FILE, F_OK);
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set_light = set_light_backlight;
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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 if (0 == strcmp(LIGHT_ID_NOTIFICATIONS, name))
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set_light = set_light_notifications;
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else if (0 == strcmp(LIGHT_ID_BUTTONS, name)) {
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if (!access(BUTTON_FILE, F_OK)) {
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// enable light button when the file is present
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set_light = set_light_buttons;
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} else {
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return -EINVAL;
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}
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}
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else if (0 == strcmp(LIGHT_ID_ATTENTION, name))
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set_light = set_light_attention;
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else
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return -EINVAL;
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pthread_once(&g_init, init_globals);
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struct light_device_t *dev = malloc(sizeof(struct light_device_t));
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if(!dev)
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return -ENOMEM;
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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 = LIGHTS_DEVICE_API_VERSION_2_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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/*
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* The lights Module
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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 = "lights Module",
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.author = "Google, Inc.",
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.methods = &lights_module_methods,
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};
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