hidl: add hidl lights hal

Change-Id: I333c8d3e20bb451d208f15661afc06ac47e1a377

Android.mk

@@ -41,6 +41,7 @@ include $(SAM_ROOT)/audio/Android.mk
 include $(SAM_ROOT)/consumerir/Android.mk
 include $(SAM_ROOT)/dtbhtool/Android.mk
 include $(SAM_ROOT)/fingerprint/Android.mk
+include $(SAM_ROOT)/hidl/Android.mk
 include $(SAM_ROOT)/liblights/Android.mk
 include $(SAM_ROOT)/modemloader/Android.mk
 include $(SAM_ROOT)/power/Android.mk

hidl/Android.mk

@@ -0,0 +1,17 @@
+#
+# Copyright (C) 2019 The LineageOS 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.
+#
+
+include $(call all-subdir-makefiles)

hidl/light/.clang-format

@@ -0,0 +1,11 @@
+BasedOnStyle: Google
+AccessModifierOffset: -2
+AllowShortFunctionsOnASingleLine: Inline
+ColumnLimit: 100
+CommentPragmas: NOLINT:.*
+DerivePointerAlignment: false
+IndentWidth: 4
+PointerAlignment: Left
+TabWidth: 4
+UseTab: Never
+PenaltyExcessCharacter: 32

hidl/light/Android.mk

@@ -0,0 +1,42 @@
+#
+# Copyright (C) 2019 The LineageOS 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)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := \
+    Light.cpp \
+    service.cpp
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+
+LOCAL_SHARED_LIBRARIES := \
+    libbase \
+    libbinder \
+    libhidlbase \
+    libhidltransport \
+    libutils \
+    android.hardware.light@2.0
+
+LOCAL_MODULE := android.hardware.light@2.0-service.samsung
+LOCAL_INIT_RC := android.hardware.light@2.0-service.samsung.rc
+LOCAL_MODULE_RELATIVE_PATH := hw
+LOCAL_MODULE_TAGS := optional
+LOCAL_MODULE_OWNER := samsung
+LOCAL_VENDOR_MODULE := true
+
+include $(BUILD_EXECUTABLE)

hidl/light/Light.cpp

@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2019 The LineageOS 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 "android.hardware.light@2.0-service.samsung"
+
+#include <iomanip>
+
+#include "Light.h"
+
+#define COLOR_MASK 0x00ffffff
+#define MAX_INPUT_BRIGHTNESS 255
+
+using android::hardware::light::V2_0::LightState;
+using android::hardware::light::V2_0::Status;
+using android::hardware::light::V2_0::Type;
+
+namespace android {
+namespace hardware {
+namespace light {
+namespace V2_0 {
+namespace implementation {
+
+/*
+ * Write value to path and close file.
+ */
+template <typename T>
+static void set(const std::string& path, const T& value) {
+    std::ofstream file(path);
+    file << value << std::endl;
+}
+
+template <typename T>
+static T get(const std::string& path, const T& def) {
+    std::ifstream file(path);
+    T result;
+
+    file >> result;
+    return file.fail() ? def : result;
+}
+
+Light::Light() {
+    mLights.emplace(Type::BACKLIGHT,
+                    std::bind(&Light::handleBacklight, this, std::placeholders::_1));
+#ifdef BUTTON_BRIGHTNESS_NODE
+    mLights.emplace(Type::BUTTONS, std::bind(&Light::handleButtons, this, std::placeholders::_1));
+#endif
+    mLights.emplace(Type::BATTERY, std::bind(&Light::handleBattery, this, std::placeholders::_1));
+    mLights.emplace(Type::NOTIFICATIONS,
+                    std::bind(&Light::handleNotifications, this, std::placeholders::_1));
+    mLights.emplace(Type::ATTENTION,
+                    std::bind(&Light::handleAttention, this, std::placeholders::_1));
+}
+
+Return<Status> Light::setLight(Type type, const LightState& state) {
+    auto it = mLights.find(type);
+
+    if (it == mLights.end()) {
+        return Status::LIGHT_NOT_SUPPORTED;
+    }
+
+    /*
+     * Lock global mutex until light state is updated.
+     */
+    std::lock_guard<std::mutex> lock(mLock);
+
+    it->second(state);
+
+    return Status::SUCCESS;
+}
+
+void Light::handleBacklight(const LightState& state) {
+    uint32_t max_brightness = get(PANEL_MAX_BRIGHTNESS_NODE, MAX_INPUT_BRIGHTNESS);
+    uint32_t brightness = rgbToBrightness(state);
+
+    if (max_brightness != MAX_INPUT_BRIGHTNESS) {
+        brightness = brightness * max_brightness / MAX_INPUT_BRIGHTNESS;
+    }
+
+    set(PANEL_BRIGHTNESS_NODE, brightness);
+}
+
+#ifdef BUTTON_BRIGHTNESS_NODE
+void Light::handleButtons(const LightState& state) {
+#ifdef VAR_BUTTON_BRIGHTNESS
+    uint32_t brightness = rgbToBrightness(state);
+#else
+    uint32_t brightness = (state.color & COLOR_MASK) ? 1 : 0;
+#endif
+
+    set(BUTTON_BRIGHTNESS_NODE, brightness);
+}
+#endif
+
+void Light::handleBattery(const LightState& state) {
+    mBatteryState = state;
+    setNotificationLED();
+}
+
+void Light::handleNotifications(const LightState& state) {
+    mNotificationState = state;
+    setNotificationLED();
+}
+
+void Light::handleAttention(const LightState& state) {
+    mAttentionState = state;
+    setNotificationLED();
+}
+
+void Light::setNotificationLED() {
+    int32_t adjusted_brightness = MAX_INPUT_BRIGHTNESS;
+    LightState state;
+#ifdef LED_BLN_NODE
+    bool bln = false;
+#endif
+
+    if (mBatteryState.color & COLOR_MASK) {
+        adjusted_brightness = LED_BRIGHTNESS_BATTERY;
+        state = mBatteryState;
+    } else if (mNotificationState.color & COLOR_MASK) {
+        adjusted_brightness = LED_BRIGHTNESS_NOTIFICATION;
+        state = mNotificationState;
+#ifdef LED_BLN_NODE
+        bln = true;
+#endif
+    } else if (mAttentionState.color & COLOR_MASK) {
+        adjusted_brightness = LED_BRIGHTNESS_ATTENTION;
+        state = mAttentionState;
+        if (state.flashMode == Flash::HARDWARE) {
+            if (state.flashOnMs > 0 && state.flashOffMs == 0) state.flashMode = Flash::NONE;
+            state.color = 0x000000ff;
+        }
+        if (state.flashMode == Flash::NONE) {
+            state.color = 0;
+        }
+    } else {
+        set(LED_BLINK_NODE, "0x00000000 0 0");
+        return;
+    }
+
+    if (state.flashMode == Flash::NONE) {
+        state.flashOnMs = 0;
+        state.flashOffMs = 0;
+    }
+
+    state.color = calibrateColor(state.color & COLOR_MASK, adjusted_brightness);
+    std::stringstream ss;
+    ss << std::hex << "0x" << std::setfill('0') << std::setw(8) << state.color << std::dec
+       << " " << state.flashOnMs << " " << state.flashOffMs;
+    set(LED_BLINK_NODE, ss.str());
+
+#ifdef LED_BLN_NODE
+    if (bln) {
+        set(LED_BLN_NODE, (state.color & COLOR_MASK) ? 1 : 0);
+    }
+#endif
+}
+
+Return<void> Light::getSupportedTypes(getSupportedTypes_cb _hidl_cb) {
+    std::vector<Type> types;
+
+    for (auto const& light : mLights) {
+        types.push_back(light.first);
+    }
+
+    _hidl_cb(types);
+
+    return Void();
+}
+
+uint32_t Light::rgbToBrightness(const LightState& state) {
+    uint32_t color = state.color & COLOR_MASK;
+
+    return ((77 * ((color >> 16) & 0xff)) + (150 * ((color >> 8) & 0xff)) + (29 * (color & 0xff))) >>
+           8;
+}
+
+uint32_t Light::calibrateColor(uint32_t color, int32_t brightness) {
+    uint32_t red = ((color >> 16) & 0xFF) * LED_ADJUSTMENT_R;
+    uint32_t green = ((color >> 8) & 0xFF) * LED_ADJUSTMENT_G;
+    uint32_t blue = (color & 0xFF) * LED_ADJUSTMENT_B;
+
+    return (((red * brightness) / 255) << 16) + (((green * brightness) / 255) << 8) +
+           ((blue * brightness) / 255);
+}
+
+}  // namespace implementation
+}  // namespace V2_0
+}  // namespace light
+}  // namespace hardware
+}  // namespace android

hidl/light/Light.h

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2019 The LineageOS 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.
+ */
+
+#ifndef ANDROID_HARDWARE_LIGHT_V2_0_LIGHT_H
+#define ANDROID_HARDWARE_LIGHT_V2_0_LIGHT_H
+
+#include <android/hardware/light/2.0/ILight.h>
+#include <hidl/MQDescriptor.h>
+#include <hidl/Status.h>
+#include <fstream>
+#include <unordered_map>
+#include "samsung_lights.h"
+
+namespace android {
+namespace hardware {
+namespace light {
+namespace V2_0 {
+namespace implementation {
+
+using ::android::sp;
+using ::android::hardware::hidl_array;
+using ::android::hardware::hidl_memory;
+using ::android::hardware::hidl_string;
+using ::android::hardware::hidl_vec;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+
+struct Light : public ILight {
+    Light();
+
+    Return<Status> setLight(Type type, const LightState& state) override;
+    Return<void> getSupportedTypes(getSupportedTypes_cb _hidl_cb) override;
+
+  private:
+    void handleBacklight(const LightState& state);
+#ifdef BUTTON_BRIGHTNESS_NODE
+    void handleButtons(const LightState& state);
+#endif
+    void handleBattery(const LightState& state);
+    void handleNotifications(const LightState& state);
+    void handleAttention(const LightState& state);
+    void setNotificationLED();
+    uint32_t rgbToBrightness(const LightState& state);
+    uint32_t calibrateColor(uint32_t color, int32_t brightness);
+
+    LightState mAttentionState;
+    LightState mBatteryState;
+    LightState mNotificationState;
+
+    std::mutex mLock;
+    std::unordered_map<Type, std::function<void(const LightState&)>> mLights;
+};
+
+}  // namespace implementation
+}  // namespace V2_0
+}  // namespace light
+}  // namespace hardware
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_LIGHT_V2_0_LIGHT_H

hidl/light/android.hardware.light@2.0-service.samsung.rc

@@ -0,0 +1,4 @@
+service vendor.light-hal-2-0 /vendor/bin/hw/android.hardware.light@2.0-service.samsung
+    class hal
+    user system
+    group system

hidl/light/include/samsung_lights.h

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2016 The CyanogenMod Project
+ * Copyright (C) 2017 The LineageOS 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.
+ */
+
+#ifndef SAMSUNG_LIGHTS_H
+#define SAMSUNG_LIGHTS_H
+
+/*
+ * Board specific nodes
+ *
+ * If your kernel exposes these controls in another place, you can either
+ * symlink to the locations given here, or override this header in your
+ * device tree.
+ */
+#define PANEL_BRIGHTNESS_NODE "/sys/class/backlight/panel/brightness"
+#define PANEL_MAX_BRIGHTNESS_NODE "/sys/class/backlight/panel/max_brightness"
+#define BUTTON_BRIGHTNESS_NODE "/sys/class/sec/sec_touchkey/brightness"
+#define LED_BLINK_NODE "/sys/class/sec/led/led_blink"
+#define LED_BLN_NODE "/sys/class/misc/backlightnotification/notification_led"
+
+// Uncomment to enable variable button brightness
+//#define VAR_BUTTON_BRIGHTNESS 1
+
+/*
+ * Brightness adjustment factors
+ *
+ * If one of your device's LEDs is more powerful than the others, use these
+ * values to equalise them. This value is in the range 0.0-1.0.
+ */
+#define LED_ADJUSTMENT_R 1.0
+#define LED_ADJUSTMENT_G 1.0
+#define LED_ADJUSTMENT_B 1.0
+
+/*
+ * Light brightness factors
+ *
+ * It might make sense for all colours to be scaled down (for example, if your
+ * LED is too bright). Use these values to adjust the brightness of each
+ * light. This value is within the range 0-255.
+ */
+#define LED_BRIGHTNESS_BATTERY 255
+#define LED_BRIGHTNESS_NOTIFICATION 255
+#define LED_BRIGHTNESS_ATTENTION 255
+
+#endif  // SAMSUNG_LIGHTS_H

hidl/light/service.cpp

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2019 The LineageOS 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 "android.hardware.light@2.0-service.samsung"
+
+#include <android-base/logging.h>
+#include <hidl/HidlTransportSupport.h>
+#include <utils/Errors.h>
+
+#include "Light.h"
+
+using android::hardware::configureRpcThreadpool;
+using android::hardware::joinRpcThreadpool;
+
+using android::hardware::light::V2_0::ILight;
+using android::hardware::light::V2_0::implementation::Light;
+
+using android::OK;
+using android::sp;
+using android::status_t;
+
+int main() {
+    sp<ILight> light = new Light();
+
+    configureRpcThreadpool(1, true);
+
+    status_t status = light->registerAsService();
+
+    if (status != OK) {
+        LOG(ERROR) << "Could not register service for Light HAL";
+        goto shutdown;
+    }
+
+    LOG(INFO) << "Light HAL service is Ready.";
+    joinRpcThreadpool();
+
+shutdown:
+    // In normal operation, we don't expect the thread pool to shutdown
+    LOG(ERROR) << "Light HAL failed to join thread pool.";
+    return 1;
+}