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/*
* 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 */
},
};
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