android_device_xiaomi_sm835.../udfps/UdfpsHandler.cpp

127 lines
2.9 KiB
C++
Raw Normal View History

/*
* Copyright (C) 2022 The LineageOS Project
*
* SPDX-License-Identifier: Apache-2.0
*/
#define LOG_TAG "UdfpsHandler.xiaomi_sm8350"
#include <android-base/logging.h>
#include <fcntl.h>
#include <fstream>
#include <poll.h>
#include <thread>
#include "UdfpsHandler.h"
// Fingerprint hwmodule commands
#define COMMAND_NIT 10
#define PARAM_NIT_UDFPS 1
#define PARAM_NIT_NONE 0
// Touchscreen and HBM
#define FOD_HBM_PATH "/sys/devices/platform/soc/soc:qcom,dsi-display-primary/fod_hbm"
#define FOD_STATUS_PATH "/sys/devices/virtual/touch/tp_dev/fod_status"
#define FOD_UI_PATH "/sys/devices/platform/soc/soc:qcom,dsi-display-primary/fod_ui"
#define FOD_HBM_OFF 0
#define FOD_HBM_ON 1
#define FOD_STATUS_OFF 0
#define FOD_STATUS_ON 1
template <typename T>
static void set(const std::string& path, const T& value) {
std::ofstream file(path);
file << value;
}
static bool readBool(int fd) {
char c;
int rc;
rc = lseek(fd, 0, SEEK_SET);
if (rc) {
LOG(ERROR) << "failed to seek fd, err: " << rc;
return false;
}
rc = read(fd, &c, sizeof(char));
if (rc != 1) {
LOG(ERROR) << "failed to read bool from fd, err: " << rc;
return false;
}
return c != '0';
}
class XiaomiUdfpsHander : public UdfpsHandler {
public:
void init(fingerprint_device_t* device) {
mDevice = device;
std::thread([this]() {
int fd = open(FOD_UI_PATH, O_RDONLY);
if (fd < 0) {
LOG(ERROR) << "failed to open fd, err: " << fd;
return;
}
struct pollfd fodUiPoll = {
.fd = fd,
.events = POLLERR | POLLPRI,
.revents = 0,
};
while (true) {
int rc = poll(&fodUiPoll, 1, -1);
if (rc < 0) {
LOG(ERROR) << "failed to poll fd, err: " << rc;
continue;
}
if (readBool(fd)) {
mDevice->extCmd(mDevice, COMMAND_NIT, PARAM_NIT_UDFPS);
set(FOD_STATUS_PATH, FOD_STATUS_ON);
} else {
mDevice->extCmd(mDevice, COMMAND_NIT, PARAM_NIT_NONE);
set(FOD_HBM_PATH, FOD_HBM_OFF);
set(FOD_STATUS_PATH, FOD_STATUS_OFF);
}
}
}).detach();
}
void onFingerDown(uint32_t /*x*/, uint32_t /*y*/, float /*minor*/, float /*major*/) {
// nothing
}
void onFingerUp() {
// nothing
}
void onAcquired(int32_t /*result*/, int32_t /*vendorCode*/) {
// nothing
}
void cancel() {
// nothing
}
private:
fingerprint_device_t* mDevice;
};
static UdfpsHandler* create() {
return new XiaomiUdfpsHander();
}
static void destroy(UdfpsHandler* handler) {
delete handler;
}
extern "C" UdfpsHandlerFactory UDFPS_HANDLER_FACTORY = {
.create = create,
.destroy = destroy,
};