Add support for Cr50 (Chromebook CCD) (#540)

usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/ChromeCcdSerialDriver.java

@@ -0,0 +1,96 @@
+package com.hoho.android.usbserial.driver;
+
+import android.hardware.usb.UsbConstants;
+import android.hardware.usb.UsbDevice;
+import android.hardware.usb.UsbEndpoint;
+import android.hardware.usb.UsbInterface;
+import android.util.Log;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.EnumSet;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.ArrayList;
+
+public class ChromeCcdSerialDriver implements UsbSerialDriver{
+
+    private final String TAG = ChromeCcdSerialDriver.class.getSimpleName();
+
+    private final UsbDevice mDevice;
+    private final List<UsbSerialPort> mPorts;
+
+    @Override
+    public UsbDevice getDevice() {
+        return mDevice;
+    }
+
+    @Override
+    public List<UsbSerialPort> getPorts() {
+        return mPorts;
+    }
+
+    public ChromeCcdSerialDriver(UsbDevice mDevice) {
+        this.mDevice = mDevice;
+        mPorts = new ArrayList<UsbSerialPort>();
+	for (int i = 0; i < 3; i++)
+	    mPorts.add(new ChromeCcdSerialPort(mDevice, i));
+    }
+
+    public class ChromeCcdSerialPort extends CommonUsbSerialPort {
+	private UsbInterface mDataInterface;
+
+        public ChromeCcdSerialPort(UsbDevice device, int portNumber) {
+            super(device, portNumber);
+        }
+
+        @Override
+        protected void openInt() throws IOException {
+            Log.d(TAG, "claiming interfaces, count=" + mDevice.getInterfaceCount());
+	    mDataInterface = mDevice.getInterface(mPortNumber);
+	    if (!mConnection.claimInterface(mDataInterface, true)) {
+		throw new IOException("Could not claim shared control/data interface");
+	    }
+            Log.d(TAG, "endpoint count=" + mDataInterface.getEndpointCount());
+            for (int i = 0; i < mDataInterface.getEndpointCount(); ++i) {
+                UsbEndpoint ep = mDataInterface.getEndpoint(i);
+                if ((ep.getDirection() == UsbConstants.USB_DIR_IN) && (ep.getType() == UsbConstants.USB_ENDPOINT_XFER_BULK)) {
+		    mReadEndpoint = ep;
+                } else if ((ep.getDirection() == UsbConstants.USB_DIR_OUT) && (ep.getType() == UsbConstants.USB_ENDPOINT_XFER_BULK)) {
+		    mWriteEndpoint = ep;
+                }
+            }
+        }
+
+        @Override
+        protected void closeInt() {
+	    try {
+		mConnection.releaseInterface(mDataInterface);
+	    } catch(Exception ignored) {}
+        }
+
+        @Override
+        public UsbSerialDriver getDriver() {
+            return ChromeCcdSerialDriver.this;
+        }
+
+        @Override
+        public EnumSet<ControlLine> getControlLines() throws IOException {
+            return EnumSet.noneOf(ControlLine.class);
+        }
+
+        @Override
+        public EnumSet<ControlLine> getSupportedControlLines() throws IOException {
+            return EnumSet.noneOf(ControlLine.class);
+        }
+    }
+
+    public static Map<Integer, int[]> getSupportedDevices() {
+        final Map<Integer, int[]> supportedDevices = new LinkedHashMap<>();
+        supportedDevices.put(UsbId.VENDOR_GOOGLE, new int[]{
+                UsbId.GOOGLE_CR50,
+        });
+        return supportedDevices;
+    }
+}

usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/UsbId.java

@@ -37,6 +37,9 @@ public final class UsbId {
     public static final int PROLIFIC_PL2303GE = 0x23e3; // "
     public static final int PROLIFIC_PL2303GS = 0x23f3; // "
 
+    public static final int VENDOR_GOOGLE = 0x18d1;
+    public static final int GOOGLE_CR50 = 0x5014;
+
     public static final int VENDOR_QINHENG = 0x1a86;
     public static final int QINHENG_CH340 = 0x7523;
     public static final int QINHENG_CH341A = 0x5523;

usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/UsbSerialProber.java

@@ -38,6 +38,7 @@ public class UsbSerialProber {
         probeTable.addDriver(ProlificSerialDriver.class);
         probeTable.addDriver(Ch34xSerialDriver.class);
         probeTable.addDriver(GsmModemSerialDriver.class);
+        probeTable.addDriver(ChromeCcdSerialDriver.class);
         return probeTable;
     }