From df693e00a86370efd17f6dd2912e61e692a9239e Mon Sep 17 00:00:00 2001
From: Ricky Niu <rickyniu@google.com>
Date: Tue, 7 Dec 2021 20:24:25 +0800
Subject: [PATCH] Implement resetUsbPort in USB HAL

Bug: 197300598
Test: Check it works

Signed-off-by: Ricky Niu <rickyniu@google.com>
Change-Id: Ibd6fd14faf47e1ad5d7817b006f9ba64e2ab5fb9
---
 usb/usb/Usb.cpp | 25 +++++++++++++++++++++++++
 usb/usb/Usb.h   |  1 +
 2 files changed, 26 insertions(+)

diff --git a/usb/usb/Usb.cpp b/usb/usb/Usb.cpp
index 32cc9c97..ba2d5b1c 100644
--- a/usb/usb/Usb.cpp
+++ b/usb/usb/Usb.cpp
@@ -172,6 +172,31 @@ ScopedAStatus Usb::enableUsbDataWhileDocked(const string& in_portName,
     return ScopedAStatus::ok();
 }
 
+ScopedAStatus Usb::resetUsbPort(const std::string& in_portName, int64_t in_transactionId) {
+    bool result = true;
+    std::vector<PortStatus> currentPortStatus;
+
+    ALOGI("Userspace reset USB Port. opID:%ld", in_transactionId);
+
+    if (!WriteStringToFile("none", PULLUP_PATH)) {
+        ALOGI("Gadget cannot be pulled down");
+        result = false;
+    }
+
+    pthread_mutex_lock(&mLock);
+    if (mCallback != NULL) {
+        ::ndk::ScopedAStatus ret = mCallback->notifyResetUsbPortStatus(
+            in_portName, result ? Status::SUCCESS : Status::ERROR, in_transactionId);
+        if (!ret.isOk())
+            ALOGE("notifyTransactionStatus error %s", ret.getDescription().c_str());
+    } else {
+        ALOGE("Not notifying the userspace. Callback is not set");
+    }
+    pthread_mutex_unlock(&mLock);
+
+    return ::ndk::ScopedAStatus::ok();
+}
+
 Status getI2cBusHelper(string *name) {
     DIR *dp;
 
diff --git a/usb/usb/Usb.h b/usb/usb/Usb.h
index 35b6cb58..1a93e191 100644
--- a/usb/usb/Usb.h
+++ b/usb/usb/Usb.h
@@ -69,6 +69,7 @@ struct Usb : public BnUsb {
             int64_t in_transactionId) override;
     ScopedAStatus limitPowerTransfer(const string& in_portName, bool in_limit,
         int64_t in_transactionId) override;
+    ScopedAStatus resetUsbPort(const string& in_portName, int64_t in_transactionId) override;
 
     std::shared_ptr<::aidl::android::hardware::usb::IUsbCallback> mCallback;
     // Protects mCallback variable