z2_plus: Add basic 2.0 -> 2.1 fingerprint HAL wrapper

Change-Id: I36752485e39c93691261d9cf90f9455c7de2648e
Signed-off-by: Erfan Abdi <erfangplus@gmail.com>

2 files changed, 227 insertions, 0 deletions

diff --git a/fingerprint/Android.mk b/fingerprint/Android.mk
new file mode 100644
index 0000000..8137e6e
--- /dev/null
+++ b/fingerprint/Android.mk
@@ -0,0 +1,31 @@
+#
+# Copyright (C) 2017 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_SRC_FILES := \
+    FingerprintWrapper.cpp
+
+LOCAL_SHARED_LIBRARIES := \
+    libhardware liblog
+
+LOCAL_MODULE_RELATIVE_PATH := hw
+LOCAL_MODULE := fingerprint.msm8996
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_SHARED_LIBRARY)
diff --git a/fingerprint/FingerprintWrapper.cpp b/fingerprint/FingerprintWrapper.cpp
new file mode 100644
index 0000000..a4e753c
--- /dev/null
+++ b/fingerprint/FingerprintWrapper.cpp
@@ -0,0 +1,196 @@
+/*
+ * Copyright (C) 2017, 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_NDEBUG 0
+#define LOG_TAG "FingerprintWrapper"
+
+#include <cutils/log.h>
+
+#include <hardware/hardware.h>
+#include <hardware/fingerprint.h>
+#include <utils/threads.h>
+
+typedef struct {
+    fingerprint_device_t base;
+    union {
+        fingerprint_device_t *device;
+        hw_device_t *hw_device;
+    } vendor;
+} device_t;
+
+static android::Mutex vendor_mutex;
+
+static union {
+    const fingerprint_module_t *module;
+    const hw_module_t *hw_module;
+} vendor;
+
+static bool ensure_vendor_module_is_loaded(void)
+{
+    android::Mutex::Autolock lock(vendor_mutex);
+
+    if (!vendor.module) {
+        int rv = hw_get_module_by_class("fingerprint", "vendor", &vendor.hw_module);
+        if (rv) {
+            ALOGE("failed to open vendor module, error %d", rv);
+            vendor.module = NULL;
+        } else {
+            ALOGI("loaded vendor module: %s version %x", vendor.module->common.name,
+                vendor.module->common.module_api_version);
+        }
+    }
+
+    return vendor.module != NULL;
+}
+
+static int set_notify(struct fingerprint_device *dev, fingerprint_notify_t notify)
+{
+    device_t *device = (device_t *) dev;
+
+    return device->vendor.device->set_notify(device->vendor.device, notify);
+}
+
+static uint64_t pre_enroll(struct fingerprint_device *dev)
+{
+    device_t *device = (device_t *) dev;
+
+    return device->vendor.device->pre_enroll(device->vendor.device);
+}
+
+static int enroll(struct fingerprint_device *dev, const hw_auth_token_t *hat, uint32_t gid,
+                uint32_t timeout_sec)
+{
+    device_t *device = (device_t *) dev;
+
+    return device->vendor.device->enroll(device->vendor.device, hat, gid, timeout_sec);
+}
+
+static int post_enroll(struct fingerprint_device *dev)
+{
+    device_t *device = (device_t *) dev;
+
+    return device->vendor.device->post_enroll(device->vendor.device);
+}
+
+static uint64_t get_authenticator_id(struct fingerprint_device *dev)
+{
+    device_t *device = (device_t *) dev;
+
+    return device->vendor.device->get_authenticator_id(device->vendor.device);
+}
+
+static int cancel(struct fingerprint_device *dev)
+{
+    device_t *device = (device_t *) dev;
+
+    return device->vendor.device->cancel(device->vendor.device);
+}
+
+static int enumerate(struct fingerprint_device *dev)
+{
+    device_t *device = (device_t *) dev;
+
+    return device->vendor.device->enumerate(device->vendor.device);
+}
+
+static int remove(struct fingerprint_device *dev, uint32_t gid, uint32_t fid)
+{
+    device_t *device = (device_t *) dev;
+
+    return device->vendor.device->remove(device->vendor.device, gid, fid);
+}
+
+static int set_active_group(struct fingerprint_device *dev, uint32_t gid, const char *store_path)
+{
+    device_t *device = (device_t *) dev;
+
+    return device->vendor.device->set_active_group(device->vendor.device, gid, store_path);
+}
+
+static int authenticate(struct fingerprint_device *dev, uint64_t operation_id, uint32_t gid)
+{
+    device_t *device = (device_t *) dev;
+
+    return device->vendor.device->authenticate(device->vendor.device, operation_id, gid);
+}
+
+static int device_close(hw_device_t *hw_device)
+{
+    device_t *device = (device_t *) hw_device;
+    int rv = device->base.common.close(device->vendor.hw_device);
+    free(device);
+    return rv;
+}
+
+static int device_open(const hw_module_t *module, const char *name, hw_device_t **device_out)
+{
+    int rv;
+    device_t *device;
+
+    if (!ensure_vendor_module_is_loaded()) {
+        return -EINVAL;
+    }
+
+    device = (device_t *) calloc(sizeof(*device), 1);
+    if (!device) {
+        ALOGE("%s: Failed to allocate memory", __func__);
+        return -ENOMEM;
+    }
+
+    rv = vendor.module->common.methods->open(vendor.hw_module, name, &device->vendor.hw_device);
+    if (rv) {
+        ALOGE("%s: failed to open, error %d\n", __func__, rv);
+        free(device);
+        return rv;
+    }
+
+    device->base.common.tag = HARDWARE_DEVICE_TAG;
+    device->base.common.version = FINGERPRINT_MODULE_API_VERSION_2_1;
+    device->base.common.module = (hw_module_t *) module;
+    device->base.common.close = device_close;
+
+    device->base.set_notify = set_notify;
+    device->base.pre_enroll = pre_enroll;
+    device->base.enroll = enroll;
+    device->base.post_enroll = post_enroll;
+    device->base.get_authenticator_id = get_authenticator_id;
+    device->base.cancel = cancel;
+    device->base.enumerate = enumerate;
+    device->base.remove = remove;
+    device->base.set_active_group = set_active_group;
+    device->base.authenticate = authenticate;
+
+    *device_out = (hw_device_t *) device;
+    return 0;
+}
+
+static struct hw_module_methods_t module_methods = {
+    .open = device_open
+};
+
+fingerprint_module_t HAL_MODULE_INFO_SYM = {
+    .common = {
+        .tag = HARDWARE_MODULE_TAG,
+        .module_api_version = FINGERPRINT_MODULE_API_VERSION_2_1,
+        .hal_api_version = HARDWARE_HAL_API_VERSION,
+        .id = FINGERPRINT_HARDWARE_MODULE_ID,
+        .name = "Lineage Fingerprint Wrapper",
+        .author = "The LineageOS Project",
+        .methods = &module_methods,
+        .dso = NULL, /* remove compilation warnings */
+        .reserved = {0}, /* remove compilation warnings */
+    },
+};