--- /dev/null
+/*
+ * Copyright (C) 2012 Stefan Seidel
+ *
+ * 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 <pthread.h>
+
+#include <hardware/lights.h>
+#include <cutils/properties.h>
+
+/******************************************************************************/
+
+static pthread_once_t g_init = PTHREAD_ONCE_INIT;
+static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
+static int max_brightness = 255;
+static char brightness_file[PROPERTY_VALUE_MAX] = { '\0' };
+
+char const*const LLP_BRIGHTNESS_FILE = "backlight.brightness_file";
+char const*const LLP_MAX_BRIGHTNESS_FILE = "backlight.max_brightness_file";
+char const*const LLP_MAX_BRIGHTNESS = "backlight.max_brightness";
+
+void init_globals(void)
+{
+ pthread_mutex_init(&g_lock, NULL);
+}
+
+static int write_int(char* 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 read_int(char* path)
+{
+ int fd;
+
+ fd = open(path, O_RDONLY);
+ if (fd >= 0) {
+ char buffer[3];
+ int amt = read(fd, buffer, 3);
+ close(fd);
+ if (amt <= 0) return -errno;
+ int ret = -1;
+ amt = sscanf(buffer, "%d", &ret);
+ return amt == -1 ? -errno : ret;
+ }
+ return -errno;
+}
+
+static int rgb_to_brightness16(struct light_state_t const* state)
+{
+ int color = state->color & 0x00ffffff;
+ return ((77*((color>>16)&0x00ff)) + (150*((color>>8)&0x00ff)) + (29*(color&0x00ff)));
+}
+
+static int set_light_backlight(struct light_device_t* dev, struct light_state_t const* state)
+{
+ int err = 0;
+ int brightness = rgb_to_brightness16(state) / (65536 / (max_brightness + 1));
+ LOGV("Setting display brightness to %d", brightness);
+
+ pthread_mutex_lock(&g_lock);
+ err = write_int(brightness_file, (brightness));
+ pthread_mutex_unlock(&g_lock);
+
+ return err;
+}
+
+static int close_lights(struct light_device_t *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;
+ char max_b_file[PROPERTY_VALUE_MAX] = { '\0' };
+ if (property_get(LLP_MAX_BRIGHTNESS, max_b_file, NULL)) {
+ if (!sscanf(max_b_file, "%d", &max_brightness)) {
+ LOGE("%s system property is set to '%s', this could not be parsed as an integer!", LLP_MAX_BRIGHTNESS, max_b_file);
+ return -EINVAL;
+ }
+ } else {
+ if (property_get(LLP_MAX_BRIGHTNESS_FILE, max_b_file, NULL)) {
+ max_brightness = read_int(max_b_file);
+ } else {
+ LOGE("%s system property not set", LLP_MAX_BRIGHTNESS_FILE);
+ return -EINVAL;
+ }
+ }
+ LOGV("Read max display brightness of %d", max_brightness);
+ if (max_brightness < 1) {
+ max_brightness = 255;
+ }
+ if (!property_get(LLP_BRIGHTNESS_FILE, brightness_file, NULL)) {
+ LOGE("%s system property not set", LLP_BRIGHTNESS_FILE);
+ return -EINVAL;
+ }
+ } 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.close = (int (*)(struct hw_device_t*))close_lights;
+ dev->common.module = (struct hw_module_t*)module;
+ dev->common.version = 0;
+ 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 = "Generic sysfs liblights implementation",
+ .author = "Stefan Seidel",
+ .methods = &lights_module_methods,
+};
+++ /dev/null
-/*
- * Copyright (C) 2011 The Android-x86 Open Source 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 <pthread.h>
-
-#include <sys/ioctl.h>
-#include <sys/types.h>
-
-#include <hardware/lights.h>
-
-/******************************************************************************/
-
-#ifndef max
-#define max( a, b ) ( ((a) > (b)) ? (a) : (b) )
-#endif
-
-#ifndef min
-#define min( a, b ) ( ((a) < (b)) ? (a) : (b) )
-#endif
-
-static pthread_once_t g_init = PTHREAD_ONCE_INIT;
-static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
-static int g_haveTrackballLight = 0;
-static struct light_state_t g_notification;
-static struct light_state_t g_battery;
-static int g_backlight = 255;
-static int g_trackball = -1;
-static int g_buttons = 0;
-static int g_attention = 0;
-
-char const* const TRACKBALL_FILE =
- "/sys/class/leds/jogball-backlight/brightness";
-
-/**
- * device methods
- */
-
-void init_globals(void) {
- // init the mutex
- pthread_mutex_init(&g_lock, NULL);
-
- // figure out if we have the trackball LED or not
- g_haveTrackballLight = (access(TRACKBALL_FILE, W_OK) == 0) ? 1 : 0;
-}
-
-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 handle_trackball_light_locked(struct light_device_t* dev) {
- int mode = 0;
-
- if (g_attention > 127) {
- mode = 3;
- } else if (!g_backlight && g_attention <= 127 && g_attention > 0) {
- mode = 7;
- }
-
- // If the value isn't changing, don't set it, because this
- // can reset the timer on the breathing mode, which looks bad.
- if (g_trackball == mode) {
- return 0;
- }
-
- return write_int(TRACKBALL_FILE, mode);
-}
-
-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) {
- int err = 0;
- int brightness = rgb_to_brightness(state); // brightness range: 0 - 255
- pthread_mutex_lock(&g_lock);
- g_backlight = brightness;
- brightness = brightness >> 4;
- brightness = min(brightness,10);// ideapad s10 3t brightness range: 0 - 10
- err = write_int("/sys/class/backlight/acpi_video0/brightness", brightness);
- if (err < 1) {
- LOGE("couldn't brightness errorcode was %d\n", err);
- } else {
- LOGI("set_light_backlight brightness=%d\n", brightness);
- }
- if (g_haveTrackballLight) {
- handle_trackball_light_locked(dev);
- }
- pthread_mutex_unlock(&g_lock);
- return err;
-}
-
-static int set_light_keyboard(struct light_device_t* dev,
- struct light_state_t const* state) {
- int err = 0;
- /*
- int on = is_lit(state);
- pthread_mutex_lock(&g_lock);
- err = write_int("/sys/class/leds/keyboard-backlight/brightness", on?255:0);
- pthread_mutex_unlock(&g_lock);
- */
- return err;
-}
-
-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);
- g_buttons = on;
- err = write_int("/sys/class/leds/button-backlight/brightness", on?255:0);
- pthread_mutex_unlock(&g_lock);
- */
- return err;
-}
-
-static int set_speaker_light_locked(struct light_device_t* dev,
- struct light_state_t const* state) {
- /*
- int len;
- int alpha, red, green, blue;
- int blink, freq, pwm;
- int onMS, offMS;
- unsigned int colorRGB;
-
- switch (state->flashMode) {
- case LIGHT_FLASH_TIMED:
- onMS = state->flashOnMS;
- offMS = state->flashOffMS;
- break;
- case LIGHT_FLASH_NONE:
- default:
- onMS = 0;
- offMS = 0;
- break;
- }
-
- colorRGB = state->color;
-
- #if 0
- LOGD("set_led_state colorRGB=%08X, onMS=%d, offMS=%d\n",
- colorRGB, onMS, offMS);
- #endif
-
- red = (colorRGB >> 16) & 0xFF;
- green = (colorRGB >> 8) & 0xFF;
- blue = colorRGB & 0xFF;
-
- write_int("/sys/class/leds/red/brightness", red);
- write_int("/sys/class/leds/green/brightness", green);
- write_int("/sys/class/leds/blue/brightness", blue);
-
- if (onMS > 0 && offMS > 0) {
- int totalMS = onMS offMS;
-
- // the LED appears to blink about once per second if freq is 20
- // 1000ms / 20 = 50
- freq = totalMS / 50;
- // pwm specifies the ratio of ON versus OFF
- // pwm = 0 -> always off
- // pwm = 255 => always on
- pwm = (onMS * 255) / totalMS;
-
- // the low 4 bits are ignored, so round up if necessary
- if (pwm > 0 && pwm < 16)
- pwm = 16;
-
- blink = 1;
- } else {
- blink = 0;
- freq = 0;
- pwm = 0;
- }
-
- if (blink) {
- write_int("/sys/class/leds/red/device/grpfreq", freq);
- write_int("/sys/class/leds/red/device/grppwm", pwm);
- }
- write_int("/sys/class/leds/red/device/blink", blink);
- */
-
- return 0;
-}
-
-static void handle_speaker_battery_locked(struct light_device_t* dev) {
- if (is_lit(&g_battery)) {
- set_speaker_light_locked(dev, &g_battery);
- } else {
- set_speaker_light_locked(dev, &g_notification);
- }
-}
-
-static int set_light_battery(struct light_device_t* dev,
- struct light_state_t const* state) {
- /*
- pthread_mutex_lock(&g_lock);
- g_battery = *state;
- if (g_haveTrackballLight) {
- set_speaker_light_locked(dev, state);
- }
- handle_speaker_battery_locked(dev);
- pthread_mutex_unlock(&g_lock);
- */
- return 0;
-}
-
-static int set_light_notifications(struct light_device_t* dev,
- struct light_state_t const* state) {
- /*
- pthread_mutex_lock(&g_lock);
- g_notification = *state;
- LOGV("set_light_notifications g_trackball=%d color=0x%08x",
- g_trackball, state->color);
- if (g_haveTrackballLight) {
- handle_trackball_light_locked(dev);
- }
- handle_speaker_battery_locked(dev);
- pthread_mutex_unlock(&g_lock);
- */
- return 0;
-}
-
-static int set_light_attention(struct light_device_t* dev,
- struct light_state_t const* state) {
- /*
- pthread_mutex_lock(&g_lock);
- g_notification = *state;
- LOGV("set_light_attention g_trackball=%d color=0x%08x",
- g_trackball, state->color);
- g_attention = rgb_to_brightness(state);
- if (g_haveTrackballLight) {
- handle_trackball_light_locked(dev);
- }
- pthread_mutex_unlock(&g_lock);
- */
- return 0;
-}
-
-/** Close the lights device */
-static int close_lights(struct light_device_t *dev) {
- if (dev) {
- free(dev);
- }
- return 0;
-}
-
-/******************************************************************************/
-
-/**
- * module methods
- */
-
-/** 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) {
- 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_notifications;
- } 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, };
-
-/*
- * The lights Module
- */
-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 = "s103t lights Module",
- .author = "wuhaigang@gmail.com, kelly2.blue@gmail.com, oliver@ratio-informatik.de",
- .methods = &lights_module_methods,
-};
-