diff --git a/Android.mk b/Android.mk index 148e36c..b81b0fb 100644 --- a/Android.mk +++ b/Android.mk @@ -2,8 +2,8 @@ #libs to be built for QCOM targets only ifeq ($(call is-vendor-board-platform,QCOM),true) -display-hals := libgralloc libgenlock libcopybit -display-hals +=libhwcomposer liboverlay libqdutils +display-hals := libgralloc libgenlock libcopybit liblight +display-hals += libhwcomposer liboverlay libqdutils endif include $(call all-named-subdir-makefiles,$(display-hals)) diff --git a/liblight/Android.mk b/liblight/Android.mk new file mode 100644 index 0000000..93ece2f --- /dev/null +++ b/liblight/Android.mk @@ -0,0 +1,26 @@ +# Copyright (C) 2008 The Android 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. + +LOCAL_PATH:= $(call my-dir) +# HAL module implemenation stored in +# hw/..so +include $(CLEAR_VARS) + +LOCAL_SRC_FILES := lights.c +LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw +LOCAL_SHARED_LIBRARIES := liblog +LOCAL_MODULE := lights.$(TARGET_BOARD_PLATFORM) +LOCAL_MODULE_TAGS := optional + +include $(BUILD_SHARED_LIBRARY) diff --git a/liblight/NOTICE b/liblight/NOTICE new file mode 100644 index 0000000..7340b9e --- /dev/null +++ b/liblight/NOTICE @@ -0,0 +1,190 @@ + + Copyright (c) 2008, The Android 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. + + 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. + + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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+static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER; +static struct light_state_t g_notification; +static struct light_state_t g_battery; +static int g_attention = 0; + +char const*const RED_LED_FILE + = "/sys/class/leds/red/brightness"; + +char const*const GREEN_LED_FILE + = "/sys/class/leds/green/brightness"; + +char const*const BLUE_LED_FILE + = "/sys/class/leds/blue/brightness"; + +char const*const LCD_FILE + = "/sys/class/leds/lcd-backlight/brightness"; + +/** + * device methods + */ + +void init_globals(void) +{ + // init the mutex + pthread_mutex_init(&g_lock, NULL); +} + +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) { + ALOGE("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) +{ + int err = 0; + int brightness = rgb_to_brightness(state); + pthread_mutex_lock(&g_lock); + err = write_int(LCD_FILE, brightness); + 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 + ALOGD("set_speaker_light_locked colorRGB=%08X, onMS=%d, offMS=%d\n", + colorRGB, onMS, offMS); +#endif + + red = (colorRGB >> 16) & 0xFF; + green = (colorRGB >> 8) & 0xFF; + blue = colorRGB & 0xFF; + + // R, G, B value is among 0, 1, 2 + if (red > 128) red = 2; + else if (red <= 128 && red > 0) red = 1; + if (green > 128) green = 2; + else if (green <= 128 && green > 0) green = 1; + if (blue > 128) blue = 2; + else if (blue <= 128 && blue > 0) red = 1; + + write_int(RED_LED_FILE, red); + write_int(GREEN_LED_FILE, green); + write_int(BLUE_LED_FILE, blue); + + // TODO + 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(RED_LED_FILE, freq); + } + + 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; + 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; + 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); + if (state->flashMode == LIGHT_FLASH_HARDWARE) { + g_attention = state->flashOnMS; + } else if (state->flashMode == LIGHT_FLASH_NONE) { + g_attention = 0; + } + handle_speaker_battery_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_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 + */ +struct hw_module_t HAL_MODULE_INFO_SYM = { + .tag = HARDWARE_MODULE_TAG, + .version_major = 1, + .version_minor = 0, + .id = LIGHTS_HARDWARE_MODULE_ID, + .name = "lights Module", + .author = "Google, Inc.", + .methods = &lights_module_methods, +};