sdm845-common: Add and build trust HAL

Change-Id: I6ffdcd0cae2afb1b1e872152f7997da704ad74dc

common.mk

@@ -126,6 +126,10 @@ PRODUCT_PACKAGES += \
     KeyHandler \
     tri-state-key_daemon
 
+# Trust HAL
+PRODUCT_PACKAGES += \
+    lineage.trust@1.0-service.oneplus_sdm845
+
 # Update engine
 PRODUCT_PACKAGES += \
     brillo_update_payload \

framework_manifest.xml

@@ -21,4 +21,13 @@
             <instance>default</instance>
         </interface>
     </hal>
+    <hal format="hidl">
+        <name>vendor.lineage.trust</name>
+        <transport>hwbinder</transport>
+        <version>1.0</version>
+        <interface>
+            <name>IUsbRestrict</name>
+            <instance>default</instance>
+        </interface>
+    </hal>
 </manifest>

sepolicy/private/file.te

@@ -1,12 +1,20 @@
+# rootfs
 type adsprpcd_file, file_type;
 type bt_firmware_file, file_type;
-type display_data_file, file_type, data_file_type, core_data_file_type;
 type firmware_file, file_type;
 type op1_file, file_type;
 type op2_file, file_type;
 type persist_file, file_type;
+
+# proc
 type proc_touchpanel, fs_type, proc_type;
-type sysfs_fpc_proximity, sysfs_type, fs_type;
+
-type sysfs_oem, sysfs_type, fs_type;
+# sysfs
-type sysfs_graphics, sysfs_type, fs_type;
 type sysfs_battery_supply, sysfs_type, fs_type;
+type sysfs_fpc_proximity, sysfs_type, fs_type;
+type sysfs_graphics, sysfs_type, fs_type;
+type sysfs_oem, sysfs_type, fs_type;
+type sysfs_usb_supply, sysfs_type, fs_type;
+
+# data
+type display_data_file, file_type, data_file_type, core_data_file_type;

sepolicy/private/file_contexts

@@ -16,9 +16,10 @@
 /system/etc/audio_policy_configuration.xml    u:object_r:vendor_configs_file:s0
 
 # HALs
-/system/bin/hw/android\.hardware\.light@2\.0-service\.oneplus_sdm845        u:object_r:hal_light_sdm845_exec:s0
+/system/bin/hw/android\.hardware\.light@2\.0-service\.oneplus_sdm845    u:object_r:hal_light_sdm845_exec:s0
 /system/bin/hw/lineage\.livedisplay@2\.0-service\.oneplus_sdm845    u:object_r:hal_livedisplay_sdm845_exec:s0
-/system/bin/hw/lineage\.touch@1\.0-service\.oneplus_sdm845          u:object_r:hal_touch_sdm845_exec:s0
+/system/bin/hw/lineage\.touch@1\.0-service\.oneplus_sdm845    u:object_r:hal_touch_sdm845_exec:s0
+/system/bin/hw/lineage\.trust@1\.0-service\.oneplus_sdm845    u:object_r:hal_trust_sdm845_exec:s0
 
 # Modules
 /system/lib/modules/wlan\.ko    u:object_r:vendor_file:s0

sepolicy/private/hal_trust_sdm845.te

@@ -0,0 +1,12 @@
+type hal_trust_sdm845, coredomain, domain;
+hal_server_domain(hal_trust_sdm845, hal_lineage_trust)
+
+type hal_trust_sdm845_exec, exec_type, file_type;
+init_daemon_domain(hal_trust_sdm845)
+
+# Talk to the binder device node
+allow hal_trust_sdm845 binder_device:chr_file rw_file_perms;
+
+# Allow access to otg toggle node
+allow hal_trust_sdm845 sysfs_usb_supply:dir search;
+allow hal_trust_sdm845 sysfs_usb_supply:file rw_file_perms;

trust/.clang-format

@@ -0,0 +1,11 @@
+BasedOnStyle: Google
+AccessModifierOffset: -2
+AllowShortFunctionsOnASingleLine: Inline
+ColumnLimit: 100
+CommentPragmas: NOLINT:.*
+DerivePointerAlignment: false
+IndentWidth: 4
+PointerAlignment: Left
+TabWidth: 4
+UseTab: Never
+PenaltyExcessCharacter: 32

trust/Android.bp

@@ -0,0 +1,33 @@
+//
+// Copyright (C) 2019 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.
+
+cc_binary {
+    name: "lineage.trust@1.0-service.oneplus_sdm845",
+    init_rc: ["lineage.trust@1.0-service.oneplus_sdm845.rc"],
+    defaults: ["hidl_defaults"],
+    relative_install_path: "hw",
+    srcs: [
+        "UsbRestrict.cpp",
+        "service.cpp",
+    ],
+    shared_libs: [
+        "libbase",
+        "libbinder",
+        "libhidlbase",
+        "libhidltransport",
+        "libutils",
+        "vendor.lineage.trust@1.0",
+    ],
+}

trust/UsbRestrict.cpp

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+#include <fstream>
+
+#include "UsbRestrict.h"
+
+#include <android-base/logging.h>
+
+namespace vendor {
+namespace lineage {
+namespace trust {
+namespace V1_0 {
+namespace implementation {
+
+static constexpr const char* kControlPath = "/sys/class/power_supply/usb/otg_switch";
+
+// Methods from ::vendor::lineage::trust::V1_0::IUsbRestrict follow.
+Return<bool> UsbRestrict::isEnabled() {
+    std::ifstream file(kControlPath);
+    std::string content;
+    file >> content;
+    file.close();
+    return !file.fail() && !std::stoi(content);
+}
+
+Return<void> UsbRestrict::setEnabled(bool enabled) {
+    std::ofstream file(kControlPath);
+    if (file.is_open()) {
+        file << (!enabled ? "1" : "0");
+        file.close();
+    } else {
+        LOG(ERROR) << "Failed to open " << kControlPath << ", error=" << errno << " ("
+                   << strerror(errno) << ")";
+    }
+    return Void();
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace trust
+}  // namespace lineage
+}  // namespace vendor

trust/UsbRestrict.h

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+#ifndef VENDOR_LINEAGE_TRUST_V1_0_USBRESTRICT_H
+#define VENDOR_LINEAGE_TRUST_V1_0_USBRESTRICT_H
+
+#include <hidl/MQDescriptor.h>
+#include <hidl/Status.h>
+#include <vendor/lineage/trust/1.0/IUsbRestrict.h>
+
+namespace vendor {
+namespace lineage {
+namespace trust {
+namespace V1_0 {
+namespace implementation {
+
+using ::android::sp;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+
+class UsbRestrict : public IUsbRestrict {
+  public:
+    UsbRestrict() = default;
+
+    // Methods from ::vendor::lineage::trust::V1_0::IUsbRestrict follow.
+    Return<bool> isEnabled() override;
+    Return<void> setEnabled(bool enabled) override;
+};
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace trust
+}  // namespace lineage
+}  // namespace vendor
+
+#endif  // VENDOR_LINEAGE_TRUST_V1_0_USBRESTRICT_H

trust/lineage.trust@1.0-service.oneplus_sdm845.rc

@@ -0,0 +1,4 @@
+service trust-hal-1-0 /system/bin/hw/lineage.trust@1.0-service.oneplus_sdm845
+    class hal
+    user root
+    group root

trust/service.cpp

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#define LOG_TAG "vendor.lineage.trust@1.0-service"
+
+#include <android-base/logging.h>
+#include <binder/ProcessState.h>
+#include <hidl/HidlTransportSupport.h>
+
+#include "UsbRestrict.h"
+
+using android::OK;
+using android::sp;
+using android::status_t;
+
+// libhwbinder:
+using android::hardware::configureRpcThreadpool;
+using android::hardware::joinRpcThreadpool;
+
+using ::vendor::lineage::trust::V1_0::IUsbRestrict;
+using ::vendor::lineage::trust::V1_0::implementation::UsbRestrict;
+
+int main() {
+    sp<IUsbRestrict> usbRestrict;
+    status_t status;
+
+    LOG(INFO) << "Trust HAL service is starting.";
+
+    usbRestrict = new UsbRestrict();
+    if (usbRestrict == nullptr) {
+        LOG(ERROR) << "Can not create an instance of Trust HAL UsbRestricted Iface, exiting.";
+        goto shutdown;
+    }
+
+    configureRpcThreadpool(1, true /*callerWillJoin*/);
+
+    status = usbRestrict->registerAsService();
+    if (status != OK) {
+        LOG(ERROR) << "Could not register service for Trust HAL UsbRestricted Iface (" << status
+                   << ").";
+    }
+
+    LOG(INFO) << "Trust HAL service is ready.";
+    joinRpcThreadpool();
+    // Should not pass this line
+
+shutdown:
+    // In normal operation, we don't expect the thread pool to shutdown
+    LOG(ERROR) << "Trust HAL service is shutting down.";
+    return 1;
+}