130 lines
3.1 KiB
C++
130 lines
3.1 KiB
C++
/*
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* Copyright (C) 2022 The LineageOS Project
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define LOG_TAG "UdfpsHandler.xiaomi_sm8350"
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#include <android-base/logging.h>
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#include <fcntl.h>
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#include <fstream>
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#include <poll.h>
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#include <thread>
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#include "UdfpsHandler.h"
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// Fingerprint hwmodule commands
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#define COMMAND_NIT 10
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#define PARAM_NIT_UDFPS 1
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#define PARAM_NIT_NONE 0
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// Touchscreen and HBM
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#define FOD_HBM_PATH "/sys/devices/platform/soc/soc:qcom,dsi-display-primary/fod_hbm"
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#define FOD_STATUS_PATH "/sys/devices/virtual/touch/tp_dev/fod_status"
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#define FOD_UI_PATH "/sys/devices/platform/soc/soc:qcom,dsi-display-primary/fod_ui"
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#define FOD_HBM_OFF 0
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#define FOD_HBM_ON 1
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#define FOD_STATUS_OFF 0
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#define FOD_STATUS_ON 1
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template <typename T>
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static void set(const std::string& path, const T& value) {
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std::ofstream file(path);
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file << value;
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}
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static bool readBool(int fd) {
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char c;
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int rc;
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rc = lseek(fd, 0, SEEK_SET);
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if (rc) {
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LOG(ERROR) << "failed to seek fd, err: " << rc;
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return false;
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}
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rc = read(fd, &c, sizeof(char));
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if (rc != 1) {
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LOG(ERROR) << "failed to read bool from fd, err: " << rc;
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return false;
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}
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return c != '0';
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}
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class XiaomiUdfpsHander : public UdfpsHandler {
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public:
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void init(fingerprint_device_t* device) {
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mDevice = device;
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std::thread([this]() {
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int fd = open(FOD_UI_PATH, O_RDONLY);
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if (fd < 0) {
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LOG(ERROR) << "failed to open fd, err: " << fd;
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return;
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}
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struct pollfd fodUiPoll = {
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.fd = fd,
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.events = POLLERR | POLLPRI,
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.revents = 0,
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};
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while (true) {
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int rc = poll(&fodUiPoll, 1, -1);
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if (rc < 0) {
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LOG(ERROR) << "failed to poll fd, err: " << rc;
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continue;
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}
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mDevice->extCmd(mDevice, COMMAND_NIT, readBool(fd) ? PARAM_NIT_UDFPS : PARAM_NIT_NONE);
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}
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}).detach();
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}
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void onFingerDown(uint32_t /*x*/, uint32_t /*y*/, float /*minor*/, float /*major*/) {
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// nothing
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}
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void onFingerUp() {
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// nothing
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}
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void onAcquired(int32_t result, int32_t vendorCode) {
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if (result == FINGERPRINT_ACQUIRED_GOOD) {
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set(FOD_HBM_PATH, FOD_HBM_OFF);
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set(FOD_STATUS_PATH, FOD_STATUS_OFF);
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} else if (vendorCode == 21 || vendorCode == 23) {
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/*
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* vendorCode = 21 waiting for fingerprint authentication
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* vendorCode = 23 waiting for fingerprint enroll
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*/
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set(FOD_STATUS_PATH, FOD_STATUS_ON);
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}
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}
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void cancel() {
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set(FOD_STATUS_PATH, FOD_STATUS_OFF);
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set(FOD_HBM_PATH, FOD_HBM_OFF);
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}
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private:
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fingerprint_device_t* mDevice;
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};
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static UdfpsHandler* create() {
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return new XiaomiUdfpsHander();
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}
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static void destroy(UdfpsHandler* handler) {
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delete handler;
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}
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extern "C" UdfpsHandlerFactory UDFPS_HANDLER_FACTORY = {
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.create = create,
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.destroy = destroy,
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};
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