sensors: Add a recalibration hook for the accelerometer

Dial *#*#ACCEL#*#*

Addresses CRACKLING-692

Change-Id: I55d034a8bb8de774ff89277845fef14863c5cccb

device.mk

@@ -107,6 +107,8 @@ PRODUCT_COPY_FILES += \
 
 # Sensors
 PRODUCT_PACKAGES += \
+    accelcal \
+    AccCalibration \
     sensord \
     sensors.msm8916
 

rootdir/etc/init.target.rc

@@ -110,3 +110,10 @@ service sensord /system/bin/sensord
 on property:init.svc.zygote=restarting
     restart sensord
 
+service calibacc /system/bin/accelcal
+    class main
+    oneshot
+    disabled
+
+on property:sys.sensors.acc=*
+    start calibacc

sensors/calibration/AccelCalib/Android.mk

@@ -0,0 +1,13 @@
+LOCAL_PATH:=$(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_CERTIFICATE := platform
+LOCAL_PRIVILEGED_MODULE := true
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+
+LOCAL_PACKAGE_NAME := AccCalibration
+
+include $(BUILD_PACKAGE)

sensors/calibration/AccelCalib/AndroidManifest.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2014 The CyanogenMod 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.
+-->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.cyngn.cracklingacc"
+    android:versionCode="1"
+    android:versionName="1.0"
+    android:sharedUserId="android.uid.system">
+    <uses-sdk android:minSdkVersion="22" />
+
+    <application
+        android:label="@string/app_name" >
+
+       <receiver android:name=".HintReceiver">
+            <intent-filter>
+                 <action android:name="android.provider.Telephony.SECRET_CODE" />
+                 <data android:scheme="android_secret_code" android:host="22235" />
+            </intent-filter>
+       </receiver>
+
+    </application>
+</manifest>

sensors/calibration/AccelCalib/res/values/strings.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="app_name">Accelerometer Calibration</string>
+    <string name="acc_calibration_complete">Accelerometer was recalibrated</string>
+</resources>

sensors/calibration/AccelCalib/src/com/cyngn/cracklingacc/HintReceiver.java

@@ -0,0 +1,29 @@
+package com.cyngn.cracklingacc;
+
+import static com.android.internal.telephony.TelephonyIntents.SECRET_CODE_ACTION;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.BroadcastReceiver;
+import android.os.SystemProperties;
+import android.util.Log;
+import android.view.KeyEvent;
+import android.widget.Toast;
+
+import com.cyngn.cracklingacc.R;
+
+
+public class HintReceiver extends BroadcastReceiver {
+
+    private static final String SECRET_CODE_PREFIX = "android_secret_code://";
+
+    private static final String CALIB_MODE = "22235";
+    public HintReceiver() {
+    }
+    
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        SystemProperties.set("sys.sensors.acc","calibrate");
+        Toast.makeText(context, R.string.acc_calibration_complete, Toast.LENGTH_LONG).show();
+    }
+}

sensors/calibration/Android.mk

@@ -0,0 +1,30 @@
+# Copyright (C) 2015 The CyanogenMod 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.
+
+
+LOCAL_PATH:= $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_SRC_FILES := accelcal.c
+
+LOCAL_PRELINK_MODULE := false
+
+LOCAL_MODULE := accelcal
+
+include $(BUILD_EXECUTABLE)
+
+include $(call all-makefiles-under,$(LOCAL_PATH))

sensors/calibration/accelcal.c

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2015 The CyanogenMod 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.
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+int main() {
+	FILE *f1, *f2, *f3;
+	int calibvals[3];
+
+
+	f1 = fopen("/sys/devices/virtual/bst/ACC/fast_calibration_x","w");
+        if (f1 == NULL) return -1;
+	f2 = fopen("/sys/devices/virtual/bst/ACC/fast_calibration_y","w");
+        if (f2 == NULL) return -1;
+	f3 = fopen("/sys/devices/virtual/bst/ACC/fast_calibration_z","w");
+        if (f3 == NULL) return -1;
+
+        fprintf(f1,"3");
+        fprintf(f2,"3");
+        fprintf(f3,"1");
+
+        fclose(f1);
+        fclose(f2);
+        fclose(f3);
+
+	f1 = fopen("/sys/devices/virtual/bst/ACC/offset_x","r");
+        if (f1 == NULL) return -1;
+	f2 = fopen("/sys/devices/virtual/bst/ACC/offset_y","r");
+        if (f2 == NULL) return -1;
+	f3 = fopen("/sys/devices/virtual/bst/ACC/offset_z","r");
+        if (f3 == NULL) return -1;
+
+	fscanf(f1,"%d",&calibvals[0]);
+	fscanf(f2,"%d",&calibvals[1]);
+	fscanf(f3,"%d",&calibvals[2]);
+
+        fclose(f1);
+        fclose(f2);
+        fclose(f3);
+
+	f1 = fopen("/data/misc/sensor/fast_calib_a","w");
+        if (f1 == NULL) return -2;
+        fprintf(f1,"%d,%d,%d",calibvals[0],calibvals[1],calibvals[2]);
+	fclose(f1);
+
+	return 0;
+}