Support USB Port Reset (476cd2e3) · Commits · e / os / android_frameworks_base

core/api/system-current.txt

+1 −0

Original line number	Diff line number	Diff line
		@@ -4690,6 +4690,7 @@ package android.hardware.usb {
		method @CheckResult @RequiresPermission(android.Manifest.permission.MANAGE_USB) public int enableUsbData(boolean);
		method @CheckResult @RequiresPermission(android.Manifest.permission.MANAGE_USB) public int enableUsbDataWhileDocked();
		method @Nullable @RequiresPermission(android.Manifest.permission.MANAGE_USB) public android.hardware.usb.UsbPortStatus getStatus();
		method @CheckResult @RequiresPermission(android.Manifest.permission.MANAGE_USB) public int resetUsbPort();
		method @RequiresPermission(android.Manifest.permission.MANAGE_USB) public void setRoles(int, int);
		field public static final int ENABLE_LIMIT_POWER_TRANSFER_ERROR_INTERNAL = 1; // 0x1
		field public static final int ENABLE_LIMIT_POWER_TRANSFER_ERROR_NOT_SUPPORTED = 2; // 0x2

core/java/android/hardware/usb/IUsbManager.aidl

+3 −0

Original line number	Diff line number	Diff line
		@@ -136,6 +136,9 @@ interface IUsbManager
		/* Resets the USB gadget. */
		void resetUsbGadget();

		/* Resets the USB port. */
		boolean resetUsbPort(in String portId, int operationId, in IUsbOperationInternal callback);

		/* Set USB data on or off */
		boolean enableUsbData(in String portId, boolean enable, int operationId, in IUsbOperationInternal callback);

core/java/android/hardware/usb/UsbManager.java

+37 −0

Original line number	Diff line number	Diff line
		@@ -1323,6 +1323,43 @@ public class UsbManager {
		}
		}

		/**
		* Should only be called by {@link UsbPort#resetUsbPort}.
		* <p>
		* Disable and then re-enable USB data signaling.
		*
		* Reset USB first port..
		* It will force to stop and restart USB data signaling.
		* Call UsbPort API if the device has more than one UsbPort.
		* </p>
		*
		* @param port reset the USB Port
		* @return true enable or disable USB data successfully
		* false if something wrong
		*
		* Should only be called by {@link UsbPort#resetUsbPort}.
		*
		* @hide
		*/
		@SystemApi
		@RequiresPermission(Manifest.permission.MANAGE_USB)
		boolean resetUsbPort(@NonNull UsbPort port, int operationId,
		IUsbOperationInternal callback) {
		Objects.requireNonNull(port, "resetUsbPort: port must not be null. opId:" + operationId);
		try {
		return mService.resetUsbPort(port.getId(), operationId, callback);
		} catch (RemoteException e) {
		Log.e(TAG, "resetUsbPort: failed. ", e);
		try {
		callback.onOperationComplete(UsbOperationInternal.USB_OPERATION_ERROR_INTERNAL);
		} catch (RemoteException r) {
		Log.e(TAG, "resetUsbPort: failed to call onOperationComplete. opId:"
		+ operationId, r);
		}
		throw e.rethrowFromSystemServer();
		}
		}

		/**
		* Should only be called by {@link UsbPort#enableUsbData}.
		* <p>

core/java/android/hardware/usb/UsbPort.java

+40 −0

Original line number	Diff line number	Diff line
		@@ -128,6 +128,9 @@ public final class UsbPort {
		@Retention(RetentionPolicy.SOURCE)
		@interface EnableUsbDataStatus{}

		@Retention(RetentionPolicy.SOURCE)
		@interface ResetUsbPortStatus{}

		/**
		* The {@link #enableLimitPowerTransfer} request was successfully completed.
		*/
		@@ -318,6 +321,43 @@ public final class UsbPort {
		mUsbManager.setPortRoles(this, powerRole, dataRole);
		}

		/**
		* Reset Usb data on the port.
		*
		* @return {@link #ENABLE_USB_DATA_SUCCESS} when request completes successfully or
		* {@link #ENABLE_USB_DATA_ERROR_INTERNAL} when request fails due to internal
		* error or
		* {@link ENABLE_USB_DATA_ERROR_NOT_SUPPORTED} when not supported or
		* {@link ENABLE_USB_DATA_ERROR_PORT_MISMATCH} when request fails due to port id
		* mismatch or
		* {@link ENABLE_USB_DATA_ERROR_OTHER} when fails due to other reasons.
		*/
		@CheckResult
		@RequiresPermission(Manifest.permission.MANAGE_USB)
		public @ResetUsbPortStatus int resetUsbPort() {
		// UID is added To minimize operationID overlap between two different packages.
		int operationId = sUsbOperationCount.incrementAndGet() + Binder.getCallingUid();
		Log.i(TAG, "resetUsbData opId:" + operationId);
		UsbOperationInternal opCallback =
		new UsbOperationInternal(operationId, mId);
		if (mUsbManager.resetUsbPort(this, operationId, opCallback) == true) {
		opCallback.waitForOperationComplete();
		}
		int result = opCallback.getStatus();
		switch (result) {
		case USB_OPERATION_SUCCESS:
		return ENABLE_USB_DATA_SUCCESS;
		case USB_OPERATION_ERROR_INTERNAL:
		return ENABLE_USB_DATA_ERROR_INTERNAL;
		case USB_OPERATION_ERROR_NOT_SUPPORTED:
		return ENABLE_USB_DATA_ERROR_NOT_SUPPORTED;
		case USB_OPERATION_ERROR_PORT_MISMATCH:
		return ENABLE_USB_DATA_ERROR_PORT_MISMATCH;
		default:
		return ENABLE_USB_DATA_ERROR_OTHER;
		}
		}

		/**
		* Enables/Disables Usb data on the port.
		*

services/usb/java/com/android/server/usb/UsbPortManager.java

+43 −0

Original line number	Diff line number	Diff line
		@@ -503,6 +503,49 @@ public class UsbPortManager {
		return HAL_MODE_DFP;
		}

		/**
		* Reset USB port.
		*
		* @param portId port identifier.
		*/
		public boolean resetUsbPort(@NonNull String portId, int transactionId,
		@NonNull IUsbOperationInternal callback, IndentingPrintWriter pw) {
		synchronized (mLock) {
		Objects.requireNonNull(callback);
		Objects.requireNonNull(portId);
		final PortInfo portInfo = mPorts.get(portId);
		if (portInfo == null) {
		logAndPrint(Log.ERROR, pw, "resetUsbPort: No such port: " + portId
		+ " opId:" + transactionId);
		try {
		callback.onOperationComplete(
		USB_OPERATION_ERROR_PORT_MISMATCH);
		} catch (RemoteException e) {
		logAndPrintException(pw,
		"resetUsbPort: Failed to call OperationComplete. opId:"
		+ transactionId, e);
		}
		return false;
		}

		try {
		try {
		return mUsbPortHal.resetUsbPort(portId, transactionId, callback);
		} catch (Exception e) {
		logAndPrintException(pw,
		"reseetUsbPort: Failed to resetUsbPort. opId:"
		+ transactionId , e);
		callback.onOperationComplete(USB_OPERATION_ERROR_INTERNAL);
		}
		} catch (RemoteException e) {
		logAndPrintException(pw,
		"resetUsbPort: Failed to call onOperationComplete. opId:"
		+ transactionId, e);
		}
		return false;
		}
		}

		public void setPortRoles(String portId, int newPowerRole, int newDataRole,
		IndentingPrintWriter pw) {
		synchronized (mLock) {