nx: Flash dummy super on clean install

Reference: https://github.com/jjpprrrr/device_xiaomi_sdm845-common/commit/03191c60c738c84b99bcc67e0c3856b4e9087876
Co-authored-by: Thomas Makin <halorocker89@gmail.com>
Co-authored-by: Tim Zimmermann <tim@linux4.de>
Change-Id: Ida93bd051185aeb22feba61d5aa5e5f6c0ec2c38

AndroidBoard.mk

@@ -33,3 +33,17 @@ $(CEC_XML_SYMLINK): $(LOCAL_INSTALLED_MODULE)
 	$(hide) ln -sf /data/vendor/permissions/android.hardware.hdmi.cec.xml $@
 
 ALL_DEFAULT_INSTALLED_MODULES += $(CEC_XML_SYMLINK)
+
+LPFLASH := $(HOST_OUT_EXECUTABLES)/lpflash$(HOST_EXECUTABLE_SUFFIX)
+INSTALLED_SUPERIMAGE_DUMMY_TARGET := $(PRODUCT_OUT)/super_dummy.img
+
+$(INSTALLED_SUPERIMAGE_DUMMY_TARGET): $(PRODUCT_OUT)/super_empty.img $(LPFLASH)
+	$(call pretty,"Target dummy super image: $@")
+	$(hide) touch $@
+	$(hide) echo $(CURDIR)
+	$(hide) $(LPFLASH) $(CURDIR)/$@ $(CURDIR)/$(PRODUCT_OUT)/super_empty.img
+
+.PHONY: super_dummyimage
+super_dummyimage: $(INSTALLED_SUPERIMAGE_DUMMY_TARGET)
+
+INSTALLED_RADIOIMAGE_TARGET += $(INSTALLED_SUPERIMAGE_DUMMY_TARGET)

BoardConfig.mk

@@ -76,6 +76,7 @@ TARGET_RECOVERY_PIXEL_FORMAT := BGRA_8888
 
 # Releasetools
 TARGET_RELEASETOOLS_EXTENSIONS := device/nintendo/nx/releasetools
+TARGET_RECOVERY_UPDATER_LIBS += librecovery_updater_nx
 
 # Security Patch Level
 VENDOR_SECURITY_PATCH := 2022-04-05

recovery/Android.mk

@@ -0,0 +1,23 @@
+#
+# Copyright (C) 2024 The LineageOS 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 := librecovery_updater_nx
+LOCAL_SRC_FILES := recovery_updater.cpp
+LOCAL_STATIC_LIBRARIES += libedify libotautil libbase
+include $(BUILD_STATIC_LIBRARY)

recovery/recovery_updater.cpp

@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: Apache-2.0
+/**
+ * @name recovery_updater.cpp
+ * @author Thomas Makin
+ * @brief NX-specific edify updater command additions.
+ * @copyright 2024 The LineageOS Project
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <android-base/logging.h>
+
+#include "edify/expr.h"
+#include "otautil/error_code.h"
+
+#define MAGIC_OFFSET 4096
+#define MAGIC_SZ 4
+#define MAGIC "gDla" // 67446c61
+
+Value *CheckSuperFn(const char *name, State *state,
+        [[maybe_unused]] const std::vector<std::unique_ptr<Expr>> &argv)
+{
+    FILE *fd = fopen("/dev/block/by-name/super", "r");
+    char read_magic[MAGIC_SZ+1];
+
+    if(!fd)
+        return ErrorAbort(state, kArgsParsingFailure, "%s(): Failed to get file", name);
+
+    fseek(fd, MAGIC_OFFSET, SEEK_SET);
+    fgets(read_magic, (MAGIC_SZ + 1), fd);
+
+    LOG(INFO) << name << ": magic read from file: " << read_magic;
+
+    fclose(fd);
+
+    if(!strcmp(read_magic, MAGIC))
+        return StringValue("SUCCESS");
+
+    return StringValue("");
+}
+
+void Register_librecovery_updater_nx()
+{
+    RegisterFunction("nx.check_super", CheckSuperFn);
+}

releasetools/releasetools.py

@@ -20,6 +20,7 @@ import re
 import os
 
 DTB_PART     = '/dev/block/by-name/dtb'
+SUPER_PART   = '/dev/block/by-name/super'
 NX_FILES     = '/mnt/vendor/hos_data'
 
 NX_BL_VERSION = '2022.10-g4f111ee6dc'