Amazfit GTR: enable firmware flashing for those who dare (untested)

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgtr/AmazfitGTRCoordinator.java

@@ -56,7 +56,8 @@ public class AmazfitGTRCoordinator extends AmazfitBipCoordinator {
 
     @Override
     public InstallHandler findInstallHandler(Uri uri, Context context) {
-        return null;
+        AmazfitGTRFWInstallHandler handler = new AmazfitGTRFWInstallHandler(uri, context);
+        return handler.isValid() ? handler : null;
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgtr/AmazfitGTRFWHelper.java

@@ -0,0 +1,44 @@
+/*  Copyright (C) 2016-2019 Andreas Shimokawa, Carsten Pfeiffer, Daniele
+    Gobbetti
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr;
+
+import android.content.Context;
+import android.net.Uri;
+
+import androidx.annotation.NonNull;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr.AmazfitGTRFirmwareInfo;
+
+public class AmazfitGTRFWHelper extends HuamiFWHelper {
+
+    public AmazfitGTRFWHelper(Uri uri, Context context) throws IOException {
+        super(uri, context);
+    }
+
+    @NonNull
+    @Override
+    protected void determineFirmwareInfo(byte[] wholeFirmwareBytes) {
+        firmwareInfo = new AmazfitGTRFirmwareInfo(wholeFirmwareBytes);
+        if (!firmwareInfo.isHeaderValid()) {
+            throw new IllegalArgumentException("Not a an Amazifit GTR firmware");
+        }
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgtr/AmazfitGTRFWInstallHandler.java

@@ -0,0 +1,49 @@
+/*  Copyright (C) 2015-2019 Andreas Shimokawa, Carsten Pfeiffer
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWInstallHandler;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+
+class AmazfitGTRFWInstallHandler extends AbstractMiBandFWInstallHandler {
+    AmazfitGTRFWInstallHandler(Uri uri, Context context) {
+        super(uri, context);
+    }
+
+    @Override
+    protected String getFwUpgradeNotice() {
+        return mContext.getString(R.string.fw_upgrade_notice_amazfitgtr, helper.getHumanFirmwareVersion());
+    }
+
+    @Override
+    protected AbstractMiBandFWHelper createHelper(Uri uri, Context context) throws IOException {
+        return new AmazfitGTRFWHelper(uri, context);
+    }
+
+    @Override
+    protected boolean isSupportedDeviceType(GBDevice device) {
+        return device.getType() == DeviceType.AMAZFITGTR;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgtr/AmazfitGTRFirmwareInfo.java

@@ -0,0 +1,116 @@
+/*  Copyright (C) 2017-2019 Andreas Shimokawa, Carsten Pfeiffer
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.HuamiFirmwareInfo;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.HuamiFirmwareType;
+import nodomain.freeyourgadget.gadgetbridge.util.ArrayUtils;
+
+public class AmazfitGTRFirmwareInfo extends HuamiFirmwareInfo {
+    private static final int FW_OFFSET = 2;
+
+    private static final byte[] FW_HEADER = new byte[]{
+            0x09, 0x20, (byte) 0x99, 0x12, 0x01, 0x08 // completely nonsense probably
+    };
+
+    private static final byte[] GPS_ALMANAC_HEADER = new byte[]{ // probably wrong
+            (byte) 0xa0, (byte) 0x80, 0x08, 0x00, (byte) 0x8b, 0x07
+    };
+
+    private static final byte[] GPS_CEP_HEADER = new byte[]{ // probably wrong
+            0x2a, 0x12, (byte) 0xa0, 0x02
+    };
+
+    // gps detection is totally bogus, just the first 16 bytes
+    private static final byte[][] GPS_HEADERS = {
+            new byte[]{
+                    0x73, 0x75, 0x68, (byte) 0xd0, 0x70, 0x73, (byte) 0xbb, 0x5a,
+                    0x3e, (byte) 0xc3, (byte) 0xd3, 0x09, (byte) 0x9e, 0x1d, (byte) 0xd3, (byte) 0xc9
+            }
+    };
+    private static Map<Integer, String> crcToVersion = new HashMap<>();
+
+    static {
+        // firmware
+
+        // Latin Firmware
+
+        // resources
+
+        // font
+
+        // gps
+        crcToVersion.put(62532, "18344,eb2f43f,126");
+    }
+
+    public AmazfitGTRFirmwareInfo(byte[] bytes) {
+        super(bytes);
+    }
+
+    @Override
+    protected HuamiFirmwareType determineFirmwareType(byte[] bytes) {
+        if (ArrayUtils.equals(bytes, NEWRES_HEADER, COMPRESSED_RES_HEADER_OFFSET_NEW)) {
+            return HuamiFirmwareType.RES_COMPRESSED;
+        }
+        if (ArrayUtils.equals(bytes, FW_HEADER, FW_OFFSET)) {
+            if (searchString32BitAligned(bytes, "Amazfit GTR")) {
+                return HuamiFirmwareType.FIRMWARE;
+            }
+            return HuamiFirmwareType.INVALID;
+        }
+        if (ArrayUtils.startsWith(bytes, WATCHFACE_HEADER)) {
+            return HuamiFirmwareType.WATCHFACE;
+        }
+        if (ArrayUtils.startsWith(bytes, NEWFT_HEADER)) {
+            if (bytes[10] == 0x01) {
+                return HuamiFirmwareType.FONT;
+            } else if (bytes[10] == 0x02) {
+                return HuamiFirmwareType.FONT_LATIN;
+            }
+        }
+
+        if (ArrayUtils.startsWith(bytes, GPS_ALMANAC_HEADER)) {
+            return HuamiFirmwareType.GPS_ALMANAC;
+        }
+        if (ArrayUtils.startsWith(bytes, GPS_CEP_HEADER)) {
+            return HuamiFirmwareType.GPS_CEP;
+        }
+
+        for (byte[] gpsHeader : GPS_HEADERS) {
+            if (ArrayUtils.startsWith(bytes, gpsHeader)) {
+                return HuamiFirmwareType.GPS;
+            }
+        }
+
+        return HuamiFirmwareType.INVALID;
+    }
+
+    @Override
+    public boolean isGenerallyCompatibleWith(GBDevice device) {
+        return isHeaderValid() && device.getType() == DeviceType.AMAZFITGTR;
+    }
+
+    @Override
+    protected Map<Integer, String> getCrcMap() {
+        return crcToVersion;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgtr/AmazfitGTRSupport.java

@@ -23,6 +23,7 @@ import android.net.Uri;
 import java.io.IOException;
 
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr.AmazfitGTRFWHelper;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitbip.AmazfitBipSupport;
 
 public class AmazfitGTRSupport extends AmazfitBipSupport {
@@ -39,6 +40,6 @@ public class AmazfitGTRSupport extends AmazfitBipSupport {
 
     @Override
     public HuamiFWHelper createFWHelper(Uri uri, Context context) throws IOException {
-        return null;
+        return new AmazfitGTRFWHelper(uri, context);
     }
 }

app/src/main/res/values/strings.xml

@@ -66,6 +66,7 @@
 \nPROCEED AT YOUR OWN RISK!
 \n
 \nCOMPLETELY UNTESTED, PROBABLY YOU NEED TO FLASH A BEATS_W FIRMWARE IF YOUR DEVICE NAME IS \"Amazfit Band 2\"</string>
+    <string name="fw_upgrade_notice_amazfitgtr">You are about to install the %s firmware on your Amazfit GTR.\n\nPlease make sure to install the .fw file, then the .res file, and finally the .gps file. Your watch will reboot after installing the .fw file.\n\nNote: You do not have to install .res and .gps if these files are exactly the same as the ones previously installed.\n\nPROCEED AT YOUR OWN RISK!</string>
     <string name="fw_upgrade_notice_miband3">You are about to install the %s firmware on your Mi Band 3.\n\nPlease make sure to install the .fw file, and after that the .res file. Your band will reboot after installing the .fw file.\n\nNote: You do not have to install .res if it is exactly the same as the one previously installed.\n\nPROCEED AT YOUR OWN RISK!</string>
     <string name="fw_upgrade_notice_miband4">You are about to install the %s firmware on your Mi Band 4.\n\nPlease make sure to install the .fw file, and after that the .res file. Your band will reboot after installing the .fw file.\n\nNote: You do not have to install .res if it is exactly the same as the one previously installed.\n\nPROCEED AT YOUR OWN RISK!</string>
     <string name="fw_multi_upgrade_notice">You are about to install the %1$s and %2$s firmware, instead of the ones currently on your Mi Band.</string>