First implementation of MifareUltralight

Change-Id: I77818ddc89b529c17fc41d6c0850688365c6b770

3 files changed, 86 insertions, 1 deletions

diff --git a/core/java/android/nfc/Tag.java b/core/java/android/nfc/Tag.java
index 938e6a7..4d9e635 100644
--- a/core/java/android/nfc/Tag.java
+++ b/core/java/android/nfc/Tag.java
@@ -18,6 +18,7 @@ package android.nfc;
 
 import android.nfc.technology.IsoDep;
 import android.nfc.technology.MifareClassic;
+import android.nfc.technology.MifareUltralight;
 import android.nfc.technology.NfcV;
 import android.nfc.technology.Ndef;
 import android.nfc.technology.NfcA;
@@ -160,6 +161,9 @@ public class Tag implements Parcelable {
                 case TagTechnology.MIFARE_CLASSIC: {
                     return new MifareClassic(adapter, this, extras);
                 }
+                case TagTechnology.MIFARE_ULTRALIGHT: {
+                    return new MifareUltralight(adapter, this, extras);
+                }
 
                 default: {
                     throw new UnsupportedOperationException("Tech " + tech + " not supported");
diff --git a/core/java/android/nfc/technology/MifareUltralight.java b/core/java/android/nfc/technology/MifareUltralight.java
new file mode 100644
index 0000000..dd1dae9
--- /dev/null
+++ b/core/java/android/nfc/technology/MifareUltralight.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2010 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.
+ * 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.
+ */
+
+package android.nfc.technology;
+
+import android.nfc.NfcAdapter;
+import android.nfc.Tag;
+import android.os.Bundle;
+import android.os.RemoteException;
+
+import java.io.IOException;
+
+/**
+ * Concrete class for TagTechnology.MIFARE_ULTRALIGHT
+ *
+ * Mifare classic has n sectors, with varying sizes, although
+ * they are at least the same pattern for any one mifare classic
+ * product. Each sector has two keys. Authentication with the correct
+ * key is needed before access to any sector.
+ *
+ * Each sector has k blocks.
+ * Block size is constant across the whole mifare classic family.
+ */
+public final class MifareUltralight extends BasicTagTechnology {
+    public static final int TYPE_ULTRALIGHT = 1;
+    public static final int TYPE_ULTRALIGHT_C = 2;
+    public static final int TYPE_UNKNOWN = 10;
+
+		private static final int NXP_MANUFACTURER_ID = 0x04;
+
+    private int mType;
+
+    public MifareUltralight(NfcAdapter adapter, Tag tag, Bundle extras) throws RemoteException {
+        super(adapter, tag, TagTechnology.MIFARE_ULTRALIGHT);
+
+        // Check if this could actually be a Mifare
+        NfcA a = (NfcA) tag.getTechnology(TagTechnology.NFC_A);
+
+        mType = TYPE_UNKNOWN;
+
+        if( a.getSak() == 0x00 && tag.getId()[0] == NXP_MANUFACTURER_ID ) {
+					// could be UL or UL-C
+					mType = TYPE_ULTRALIGHT;
+        }
+    }
+
+    public int getType() {
+        return mType;
+    }
+
+    // Methods that require connect()
+    /**
+     * @throws IOException
+     */
+    public byte[] readBlock(int block) throws IOException {
+        byte[] blockread_cmd = { 0x30, (byte)block }; // phHal_eMifareRead
+        return transceive(blockread_cmd);
+    }
+
+    /**
+     * @throws IOException
+     */
+/*
+    public byte[] readOTP();
+    public void writePage(int block, byte[] data);
+    public void writeBlock(int block, byte[] data);
+*/
+}
diff --git a/core/java/android/nfc/technology/TagTechnology.java b/core/java/android/nfc/technology/TagTechnology.java
index c6c65e8..2b4f74c 100644
--- a/core/java/android/nfc/technology/TagTechnology.java
+++ b/core/java/android/nfc/technology/TagTechnology.java
@@ -77,7 +77,7 @@ public interface TagTechnology {
     public static final int MIFARE_CLASSIC_NDEF = 201;
 
     /**
-     * A Mifare Ultralight tag
+     * This object is an instance of {@link MifareUltralight}
      */
     public static final int MIFARE_ULTRALIGHT = 202;