sdm660-common: DeviceSettings: Add USB fastcharge toggle

Co-authored-by: ronaxdevil <pratabidya.007@gmail.com>
Signed-off-by: clarencelol <clarencekuiek@icloud.com>
Signed-off-by: pix106 <sbordenave@gmail.com>

DeviceSettings/res/drawable/ic_usb_fastcharge.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?> <!-- drawable/usb.xml --> <vector 
+xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?android:attr/colorControlNormal" >
+    <path android:fillColor="#000" 
+android:pathData="M15,7V11H16V13H13V5H15L12,1L9,5H11V13H8V10.93C8.7,10.56 
+9.2,9.85 9.2,9C9.2,7.78 8.21,6.8 7,6.8C5.78,6.8 4.8,7.78 4.8,9C4.8,9.85 
+5.3,10.56 6,10.93V13A2,2 0 0,0 8,15H11V18.05C10.29,18.41 9.8,19.15 
+9.8,20A2.2,2.2 0 0,0 12,22.2A2.2,2.2 0 0,0 14.2,20C14.2,19.15 13.71,18.41 
+13,18.05V15H16A2,2 0 0,0 18,13V11H19V7H15Z" />
+</vector>

DeviceSettings/res/values/strings.xml

@@ -152,4 +152,9 @@
     <string name="dirac_preset_soft_bass">Soft Bass</string>
     <string name="dirac_preset_soft_treble">Soft Treble</string>
 
+    <!-- USB fastcharge -->
+    <string name="usb_fastcharge_title">USB Fastcharge</string>
+    <string name="fastcharge_title">Enable USB Fastcharge</string>
+    <string name="fastcharge_summary">Charge upto 900mA when connected to a computer via USB 3.0 port</string>
+
 </resources>

DeviceSettings/res/xml/preferences_xiaomi_parts.xml

@@ -173,6 +173,18 @@
                 android:targetClass="com.xiaomi.parts.speaker.ClearSpeakerActivity"
                 android:targetPackage="com.xiaomi.parts.speaker" />
         </Preference>
-      </PreferenceCategory>
+    </PreferenceCategory>
+
+    <PreferenceCategory
+        android:key="usb_fastcharge"
+        android:title="@string/usb_fastcharge_title" >
+
+        <org.lineageos.settings.device.preferences.SecureSettingSwitchPreference
+            android:key="fastcharge"
+            android:defaultValue="true"
+            android:title="@string/fastcharge_title"
+            android:icon="@drawable/ic_usb_fastcharge"
+            android:summary="@string/fastcharge_summary" />
+    </PreferenceCategory>
 
 </PreferenceScreen>

DeviceSettings/src/org/lineageos/settings/device/BootReceiver.java

@@ -85,6 +85,10 @@ public class BootReceiver extends BroadcastReceiver implements Utils {
         // Dirac
         context.startService(new Intent(context, DiracService.class));
 
+        // USB Fastcharge
+        FileUtils.setValue(DeviceSettings.USB_FASTCHARGE_PATH, Settings.Secure.getInt(context.getContentResolver(),
+                DeviceSettings.PREF_USB_FASTCHARGE, 0));
+
         // FPS Info
         boolean enabled = Settings.Secure.getInt(context.getContentResolver(), 
                 DeviceSettings.PREF_KEY_FPS_INFO, 0) == 1;

DeviceSettings/src/org/lineageos/settings/device/DeviceSettings.java

@@ -57,6 +57,9 @@ public class DeviceSettings extends PreferenceFragment implements
     private static final String PREF_PRESET = "dirac_preset_pref";
 
     public static final String PREF_KEY_FPS_INFO = "fps_info";
+    public static final String CATEGORY_FASTCHARGE = "usb_fastcharge";
+    public static final String PREF_USB_FASTCHARGE = "fastcharge";
+    public static final String USB_FASTCHARGE_PATH = "/sys/kernel/fast_charge/force_fast_charge";
 
     // value of vtg_min and vtg_max
     public static final int MIN_VIBRATION = 116;
@@ -86,6 +89,7 @@ public class DeviceSettings extends PreferenceFragment implements
     private SecureSettingSwitchPreference mEnableDirac;
     private SecureSettingListPreference mHeadsetType;
     private SecureSettingListPreference mPreset;
+    private SecureSettingSwitchPreference mFastcharge;
 
     @Override
     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
@@ -135,7 +139,6 @@ public class DeviceSettings extends PreferenceFragment implements
         } else {
           gainCategory.removePreference(findPreference(PREF_MIC_GAIN));
         }
-
         // Display Category
         PreferenceCategory displayCategory = (PreferenceCategory) findPreference(CATEGORY_DISPLAY);
         // Doze
@@ -190,6 +193,15 @@ public class DeviceSettings extends PreferenceFragment implements
         } else {
             getPreferenceScreen().removePreference(findPreference(CATEGORY_HALL_WAKEUP));
         }
+
+        if (FileUtils.fileWritable(USB_FASTCHARGE_PATH)) {
+            mFastcharge = (SecureSettingSwitchPreference) findPreference(PREF_USB_FASTCHARGE);
+            mFastcharge.setEnabled(Fastcharge.isSupported());
+            mFastcharge.setChecked(Fastcharge.isCurrentlyEnabled(this.getContext()));
+            mFastcharge.setOnPreferenceChangeListener(new Fastcharge(getContext()));
+        } else {
+            getPreferenceScreen().removePreference(findPreference(CATEGORY_FASTCHARGE));
+        }
     }
 
     @Override

DeviceSettings/src/org/lineageos/settings/device/Fastcharge.java

@@ -0,0 +1,65 @@
+/*
+* Copyright (C) 2020 ronaxdevil <pratabidya.007@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 2 of the License, or
+* (at your option) any later version.
+*
+* This program 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program. If not, see <http://www.gnu.org/licenses/>.
+*
+*/
+package org.lineageos.settings.device;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.provider.Settings;
+import androidx.preference.Preference;
+import androidx.preference.Preference.OnPreferenceChangeListener;
+import androidx.preference.PreferenceManager;
+
+import org.lineageos.settings.device.DeviceSettings;
+
+public class Fastcharge implements OnPreferenceChangeListener {
+
+    private Context mContext;
+
+    public Fastcharge(Context context) {
+        mContext = context;
+    }
+
+    public static String getFile() {
+        if (FileUtils.fileWritable(DeviceSettings.USB_FASTCHARGE_PATH)) {
+            return DeviceSettings.USB_FASTCHARGE_PATH;
+        }
+        return null;
+    }
+
+    public static boolean isSupported() {
+        return FileUtils.fileWritable(getFile());
+    }
+
+    public static boolean isCurrentlyEnabled(Context context) {
+        return FileUtils.getFileValueAsBoolean(getFile(), false);
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object value) {
+        final String key = preference.getKey();
+        switch (key) {
+            case DeviceSettings.PREF_USB_FASTCHARGE:
+                FileUtils.setValue(DeviceSettings.USB_FASTCHARGE_PATH, (boolean) value);
+                break;
+
+            default:
+                break;
+        }
+        return true;
+    }
+}

DeviceSettings/src/org/lineageos/settings/device/FileUtils.java

@@ -115,6 +115,14 @@ public class FileUtils {
         return line;
     }
 
+    static boolean getFileValueAsBoolean(String filename, boolean defValue) {
+        String fileValue = getValue(filename);
+        if (fileValue != null) {
+            return !fileValue.equals("0");
+        }
+        return defValue;
+    }
+
     static void setProp(String prop, boolean value) {
         if (value) {
             SystemProperties.set(prop, "1");

rootdir/etc/init.xiaomi_parts.rc

@@ -41,6 +41,10 @@ on boot
     chmod 0660 /sys/class/leds/red/brightness
     chmod 0660 /sys/class/leds/red/max_brightness
 
+    # USB Fastcharge
+    chown system system /sys/kernel/fast_charge/force_fast_charge
+    chmod 0660 /sys/kernel/fast_charge/force_fast_charge
+
 # KCal
     chown system system /sys/devices/platform/kcal_ctrl.0/kcal_cont
     chown system system /sys/devices/platform/kcal_ctrl.0/kcal_enable

sepolicy/vendor/file.te

@@ -17,6 +17,9 @@ type vendor_sysfs_hvdcp, fs_type, sysfs_type;
 # Hall Switch
 type hall_dev, sysfs_type, fs_type;
 
+# Fast Charge
+type sysfs_fcharge, sysfs_type, fs_type;
+
 # Kcal
 type kcal_dev, sysfs_type, fs_type;
 

sepolicy/vendor/genfs_contexts

@@ -67,3 +67,4 @@ genfscon sysfs /devices/platform/soc/ca0c000.qcom,cci/ca0c000.qcom,cci:qcom,came
 genfscon sysfs /devices/platform/soc/ca0c000.qcom,cci/ca0c000.qcom,cci:qcom,camera@1/video4linux/video3/wakeup                                       u:object_r:sysfs_wakeup:s0
 genfscon sysfs /devices/platform/soc/ca0c000.qcom,cci/ca0c000.qcom,cci:qcom,camera@2/video4linux/video4/wakeup                                       u:object_r:sysfs_wakeup:s0
 genfscon sysfs /devices/virtual/input/input1/wakeup                                                                                                  u:object_r:sysfs_wakeup:s0
+genfscon sysfs /kernel/fast_charge/force_fast_charge            u:object_r:sysfs_fcharge:s0

sepolicy/vendor/system_app.te

@@ -5,6 +5,7 @@ allow system_app kcal_dev:dir search;
 allow system_app kcal_dev:file rw_file_perms;
 allow system_app proc_pagetypeinfo:file r_file_perms;
 allow system_app proc_vmallocinfo:file read;
+allow system_app sysfs_fcharge:file rw_file_perms;
 allow system_app sysfs_vibrator:dir search;
 allow system_app sysfs_vibrator:file rw_file_perms;
 allow system_app sysfs_graphics:dir search;