Add USB Gadget HAL 1.2 support

Add a new API to query current USB connection speed

Bug: 181938674
Test: Pass USB Gadget V1.2 HIDL tests
Signed-off-by: Albert Wang <albertccwang@google.com>
Change-Id: Ib908434771854e66d22323b15c02acffe1eff48b

usb/Android.bp

@@ -1,5 +1,5 @@
 //
-// Copyright (C) 2018 The Android Open Source Project
+// Copyright (C) 2020 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.
@@ -23,7 +23,7 @@ cc_binary {
     init_rc: ["android.hardware.usb@1.2-service.redfin.rc"],
     vintf_fragments: [
         "android.hardware.usb@1.2-service.redfin.xml",
-        "android.hardware.usb.gadget@1.1-service.redfin.xml",
+        "android.hardware.usb.gadget@1.2-service.redfin.xml",
     ],
     srcs: ["service.cpp", "Usb.cpp", "UsbGadget.cpp"],
     shared_libs: [
@@ -32,6 +32,7 @@ cc_binary {
         "android.hardware.usb@1.2",
         "android.hardware.usb.gadget@1.0",
         "android.hardware.usb.gadget@1.1",
+        "android.hardware.usb.gadget@1.2",
         "libbase",
         "libcutils",
         "libhardware",

usb/UsbGadget.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright (C) 2020 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.
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#define LOG_TAG "android.hardware.usb.gadget@1.1-service.redfin"
+#define LOG_TAG "android.hardware.usb.gadget@1.2-service.redfin"
 
 #include "UsbGadget.h"
 #include <dirent.h>
@@ -30,7 +30,7 @@ namespace android {
 namespace hardware {
 namespace usb {
 namespace gadget {
-namespace V1_1 {
+namespace V1_2 {
 namespace implementation {
 
 UsbGadget::UsbGadget() {
@@ -55,6 +55,40 @@ Return<void> UsbGadget::getCurrentUsbFunctions(const sp<V1_0::IUsbGadgetCallback
     return Void();
 }
 
+Return<void> UsbGadget::getUsbSpeed(const sp<V1_2::IUsbGadgetCallback> &callback) {
+    std::string current_speed;
+    if (ReadFileToString(SPEED_PATH, &current_speed)) {
+        current_speed = Trim(current_speed);
+        ALOGI("current USB speed is %s", current_speed.c_str());
+        if (current_speed == "low-speed")
+            mUsbSpeed = UsbSpeed::LOWSPEED;
+        else if (current_speed == "full-speed")
+            mUsbSpeed = UsbSpeed::FULLSPEED;
+        else if (current_speed == "high-speed")
+            mUsbSpeed = UsbSpeed::HIGHSPEED;
+        else if (current_speed == "super-speed")
+            mUsbSpeed = UsbSpeed::SUPERSPEED;
+        else if (current_speed == "super-speed-plus")
+            mUsbSpeed = UsbSpeed::SUPERSPEED_10Gb;
+        else if (current_speed == "UNKNOWN")
+            mUsbSpeed = UsbSpeed::UNKNOWN;
+        else
+            mUsbSpeed = UsbSpeed::RESERVED_SPEED;
+    } else {
+        ALOGE("Fail to read current speed");
+        mUsbSpeed = UsbSpeed::UNKNOWN;
+    }
+
+    if (callback) {
+        Return<void> ret = callback->getUsbSpeedCb(mUsbSpeed);
+
+        if (!ret.isOk())
+            ALOGE("Call to getUsbSpeedCb failed %s", ret.description().c_str());
+    }
+
+    return Void();
+}
+
 V1_0::Status UsbGadget::tearDownGadget() {
     if (resetGadget() != Status::SUCCESS)
         return Status::ERROR;
@@ -357,7 +391,7 @@ error:
     return Void();
 }
 }  // namespace implementation
-}  // namespace V1_1
+}  // namespace V1_2
 }  // namespace gadget
 }  // namespace usb
 }  // namespace hardware

usb/UsbGadget.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright (C) 2020 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.
@@ -19,7 +19,9 @@
 #include <android-base/file.h>
 #include <android-base/properties.h>
 #include <android-base/unique_fd.h>
-#include <android/hardware/usb/gadget/1.1/IUsbGadget.h>
+#include <android-base/strings.h>
+#include <android/hardware/usb/gadget/1.2/types.h>
+#include <android/hardware/usb/gadget/1.2/IUsbGadget.h>
 #include <hidl/MQDescriptor.h>
 #include <hidl/Status.h>
 #include <pixelusb/UsbGadgetCommon.h>
@@ -36,13 +38,15 @@ namespace android {
 namespace hardware {
 namespace usb {
 namespace gadget {
-namespace V1_1 {
+namespace V1_2 {
 namespace implementation {
 
 using ::android::sp;
 using ::android::base::GetProperty;
 using ::android::base::SetProperty;
+using ::android::base::Trim;
 using ::android::base::unique_fd;
+using ::android::base::ReadFileToString;
 using ::android::base::WriteStringToFile;
 using ::android::hardware::hidl_array;
 using ::android::hardware::hidl_memory;
@@ -60,14 +64,18 @@ using ::android::hardware::google::pixel::usb::MonitorFfs;
 using ::android::hardware::google::pixel::usb::resetGadget;
 using ::android::hardware::google::pixel::usb::setVidPid;
 using ::android::hardware::google::pixel::usb::unlinkFunctions;
-using ::android::hardware::usb::gadget::V1_0::GadgetFunction;
+using ::android::hardware::usb::gadget::V1_0::IUsbGadgetCallback;
 using ::android::hardware::usb::gadget::V1_0::Status;
-using ::android::hardware::usb::gadget::V1_1::IUsbGadget;
+using ::android::hardware::usb::gadget::V1_2::IUsbGadget;
+using ::android::hardware::usb::gadget::V1_2::GadgetFunction;
 using ::std::string;
 
 constexpr char kGadgetName[] = "a600000.dwc3";
 static MonitorFfs monitorFfs(kGadgetName);
 
+#define UDC_PATH "/sys/class/udc/a600000.dwc3/"
+#define SPEED_PATH UDC_PATH "current_speed"
+
 struct UsbGadget : public IUsbGadget {
     UsbGadget();
 
@@ -75,6 +83,7 @@ struct UsbGadget : public IUsbGadget {
     std::mutex mLockSetCurrentFunction;
     uint64_t mCurrentUsbFunctions;
     bool mCurrentUsbFunctionsApplied;
+    UsbSpeed mUsbSpeed;
 
     Return<void> setCurrentUsbFunctions(uint64_t functions,
                                         const sp<V1_0::IUsbGadgetCallback> &callback,
@@ -84,6 +93,8 @@ struct UsbGadget : public IUsbGadget {
 
     Return<Status> reset() override;
 
+    Return<void> getUsbSpeed(const sp<V1_2::IUsbGadgetCallback> &callback) override;
+
 private:
     Status tearDownGadget();
     Status setupFunctions(uint64_t functions, const sp<V1_0::IUsbGadgetCallback> &callback,
@@ -91,7 +102,7 @@ private:
 };
 
 }  // namespace implementation
-}  // namespace V1_1
+}  // namespace V1_2
 }  // namespace gadget
 }  // namespace usb
 }  // namespace hardware

usb/android.hardware.usb.gadget@1.2-service.redfin.xml

@@ -2,7 +2,7 @@
     <hal format="hidl">
         <name>android.hardware.usb.gadget</name>
         <transport>hwbinder</transport>
-        <version>1.1</version>
+        <version>1.2</version>
         <interface>
             <name>IUsbGadget</name>
             <instance>default</instance>

usb/service.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright (C) 2020 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.
@@ -27,8 +27,8 @@ using android::hardware::configureRpcThreadpool;
 using android::hardware::joinRpcThreadpool;
 
 // Generated HIDL files
-using android::hardware::usb::gadget::V1_1::IUsbGadget;
+using android::hardware::usb::gadget::V1_2::IUsbGadget;
-using android::hardware::usb::gadget::V1_1::implementation::UsbGadget;
+using android::hardware::usb::gadget::V1_2::implementation::UsbGadget;
 using android::hardware::usb::V1_2::IUsb;
 using android::hardware::usb::V1_2::implementation::Usb;